CHILLERVISOR System Manager IIIManual Revisions The CHILLERVISOR System Manager III Overview and Configuration Manual is catalog number 808-957, Rev. 1/08. This revision replaces catalog

Overview and Configuration Manual

CHILLERVISORSystem Manager III

NETWORKCOMFORT

This document is the property of Carrier Corporation and is delivered onthe express condition that it is not to be disclosed, reproduced in wholeor in part, or used for manufacture by anyone other than CarrierCorporation without its written consent, and that no right is granted todisclose or so use any information contained in said document.

Carrier reserves the right to change or modify the information or productdescribed without prior notice and without incurring any liability.

© 2008, Carrier Corporation

ManualRevisions

The CHILLERVISOR System Manager III Overview andConfiguration Manual is catalog number 808-957, Rev. 1/08. Thisrevision replaces catalog number 808-957, Rev. 01/08.

The following changes have been made since the 08/03 version.

Section/Chapter Changes

Overview 1. Under CSM III Functions, added a note to theChiller Start/Stop Sequencing Modes section.

2. Under CSM III Functions,, updated theAdditional Cooling Required (ACR) Algorithmsection to use a configurable ACR demandlimit. Also updated the ACR Algorithmexample and the Demand Limiting section forthe same.

Service Configuration Table Decisions 3. In the Service Configuration Table, addedACR Demand Limit decision, updated thedefault value for the Clear Failstart Timedecision, updated metric allowable entries forACR Function Setpoint Delta T decision, andupdated metric allowable entries as well asdefault values for ACR Function PulldownRate Limit decision.

4. In the Bypass Value Service ConfigurationTable, added Opening Time decision, updatedmetric allowable entries for CHW SetpointHysteresis decision,

Configuration Sheets 5. Added ACR Demand Limit to ServiceConfiguration Table Configuration Sheet

Appendix C - System Flowcharts 5. Updated Additional Cooling Require (ACR)flowchart to use ACE Demand Limit.

iii

iv

Contents

Overview ............................................................................... 1

About this Manual ...................................................... 1

Introduction ................................................................ 2

Other Required Documentation ................................. 4

CSM III Hardware ..................................................... 4

Sensors ....................................................................... 5

Required Sensor ................................. 5

Optional Sensors ................................ 6

Operator Interfaces ..................................................... 7

Chiller Information .................................................... 9

CSM III Functions ..................................................... 9

Manual ProgramEnable/Disable ................................. 10

Mixed Plant Capability .................... 10

Chiller Start/Stop SequencingModes ............................................... 10

Standby Chiller Support ................... 11

Cooling Active ................................. 11

Remote Start Contact/Plant Switch (Optional) .................... 11

Temperature OverrideFunction ........................................... 12

Time Schedule and TimeSchedule Override ............................ 12

Chiller AvailabilityDetermination................................... 12

Control SensorDetermination................................... 13

Hardwired TemperatureSensors Configuration ...................... 13

v

vi

Outside Air Temperature ................. 15

Automatic Chiller Start/Stop ............ 15

Add/Drop Sequencing ...................... 15

Additional Cooling Required(ACR) Algorithm ............................. 16

ACR Algorithm Example................. 17

ACR Sequencing Modes .................. 18

New Chiller Inhibit Time ................. 19

Capacity Control .............................. 19

Type 1 (Chiller ControlPoint) ................................................ 20

Type 2 (kW Balancing) .................... 20

Ramp Loading .................................. 20

Setpoint Reset (Optional) ................. 21

Demand Limiting ............................. 24

Reduced Cooling Required(RCR) Algorithm ............................. 24

RCR Algorithm Example ................. 26

Bypass Valve Control ...................... 27

Chiller Fault Determinationand Handling .................................... 30

Hardwired Sensors AlarmLimits ............................................... 30

Automatic Program Disablingand Alarm Conditions ...................... 31

CSM III Alarms ............................... 32

CSM III Alerts ................................. 39

Power Fail Restart ............................ 39

Network Functions ................................................... 40

Water System Manager .................... 40

vii

Loadshed .......................................... 40

Data Transfer .................................... 41

Data Collection ................................ 41

BEST and BEST++ .......................... 41

Points Display Table Decisions ............................................... 43

System Points Display Table Decisions................... 43

Points1 Display Table Decisions ............................. 49

Points2 Display Table Decisions ............................. 52

Bypass Points DisplayTable Decisions ........................................................ 55

Configuration Table Decisions ............................................... 59

CHILLERS Configuration Table Decisions ............ 59

Chiller Sequencing Configuration TableDecisions .................................................................. 62

Time Schedule Configuration TableDecisions .................................................................. 68

Holiday Configuration Table Decisions .................. 70

Setpoint Configuration Table Decisions .................. 72

Broadcast Configuration Table Decisions ............... 74

Service Configuration Table Decisions ................................ 79

Service Configuration TableDecisions .................................................................. 79

Sensors1 Configuration Table Decisions ................. 90

Sensors2 Configuration Table Decisions ................. 94

viii

Bypass Valve Service ConfigurationTable Decisions ........................................................ 96

Alarms Service Configuration TableDecisions .................................................................. 99

Maintenance Table Decisions ............................................. 105

BASEMAIN Maintenance Table Decisions .......... 105

Chiller Maintenance Table Decisions .................... 115

Time Schedule Maintenance Table Decisions ....... 118

WSMDEFME Maintenance Table Decisions ........ 121

Configuration Sheets .........................................................123

Appendix A ............................................................................... 139

Glossary ................................................................. 139

Appendix B ................................................................................ 141

Network Access ..................................................... 141

Appendix C ............................................................................... 145

System Flowcharts ................................................. 145

Index .................................................................................. 153

Figures Figure 1 Sample CHILLERVISORSystem Layout ........................................ 3

Figure 2 CHILLERVISOR SystemManager III ............................................. 5

Figure 3 Remote Contact/Plant Switch(REMCON) Wiring Diagram ............... 15

Figure 4 Reset Types........................................... 22

Figure 5 Correcting RCR Setpoint ...................... 26

Figure 6 BASESYS PointsDisplay Table........................................ 44

Figure 7 POINTS1 Display Table....................... 49

Figure 8 POINTS2 Display Table....................... 52

Figure 9 BYPASS Points Display Table............. 55

Figure 10 CHILLERS Configuration Table.......... 60

Figure 11 SEQUENCE ConfigurationTable ..................................................... 62

Figure 12 Time Schedule ConfigurationTable (OCCDEFCS) ............................. 68

Figure 13 Holiday Configuration Table ................ 71

Figure 14 SETPOINT ConfigurationTable (SETPOINT)............................... 72

Figure 15 Broadcast ConfigurationTable (BRODEF).................................. 74

Figure 16 SERVICE Configuration Table ............ 80

Figure 17 SENSORS1 ServiceConfiguration Table.............................. 90

Figure 18 SENSORS2 ServiceConfiguration Table.............................. 94

Figure 19 Bypass Valve ServiceConfiguration Table (BYPASS) ........... 97

Figure 20 ALARMS Configuration Table .......... 100

Figure 21 BASEMAIN Maintenance Table........ 106

Figure 22 Chiller Maintenance Table(CHILLER1)....................................... 115

ix

Figure 23 Time Schedule MaintenanceTable (OCCDEFME).......................... 118

Figure 24 WSMDEFME Maintenance Table ..... 121

Tables Table 1 Base Module and OptionalModule Inputs ....................................... 14

Table 2 Base Module Outputs ........................... 14

Table 3 Configured Values forACR Algorithm Example ..................... 17

Table 4 Lag Chiller Start Criteria forACR Algorithm Example ..................... 17

Table 5 BASESYS Table Network Access ..... 142

Table 6 POINTS1 Table Network Access ....... 142

Table 7 POINTS2 Table Network Access ....... 143

Table 8 BYPASS Table Network Access........ 143

Table 9 BASEMAIN Table NetworkAccess ................................................. 144

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Overview

1

This manual contains information about the functions of theCHILLERVISOR System Manager III (CSM III) and how you mustconfigure it to perform those functions.

This manual is divided into the following chapters and appendixes:

• Overview• Points Display Table Decisions• Configuration Table Decisions• Service Configuration Table Decisions• Maintenance Table Decisions• Configuration Sheets• Appendixes A–C

The Overview chapter gives a detailed description of the CSMhardware and control functions.

The Points Display Table Decisions chapter contains illustrations ofthe CSM’s points display tables and descriptions of all the informa-tion displayed for each point.

The Configuration Table Decisions chapter includes illustrations ofthe CSM’s configuration tables and descriptions of all configurationtable decisions.

The Service Configuration Table Decisions chapter contains illustra-tions of the CSM’s service configuration tables and descriptions ofall service configuration table decisions.

The Maintenance Table Decisions chapter contains illustrations ofthe CSM’s maintenance tables and descriptions of all maintenancetable decisions.

The Configuration Sheets chapter contains blank configurationsheets for the CSM’s configuration and service configuration tables.The sheets are lists of configuration decisions arranged in tableformat with space provided to write in values for each decision.You can make copies of these blank sheets for use as worksheetsand hard copy records when configuring the CSM.

Overview

About this Manual

2

Appendix A provides definitions of acronyms used in this manual.

Appendix B lists the CSM points that can be accessed by BEST(phase IV) and BEST++ on the CCN. These tables also indicate thenetwork Read Only or Read/Write capability of each accessiblepoint.

Appendix C contains function flowcharts, for example, sequencing,capacity control, starting and stopping, and bypass valve control.

The CSM is a component of the Carrier Comfort Network (CCN)CHILLERVISOR System. The CSM is designed to function withchillers, Comfort Controllers, and other CCN system elements toprovide total chiller system control. The CSM can presently inter-face with the following Carrier chillers:

• 17EX, 17TS, 19XL, 19EX, and 19XR centrifugal chillers• 23XL screw compressor chillers• 30GX/HX screw chillers• Flotronic II reciprocating chillers (phase 3 only)• ProDialog II reciprocating chillers• 32MP Gateway–equipped single or dual compressor chillers

The CSM coordinates the operations of a multiple chiller systemconsisting of up to eight chillers feeding a common chilled waterloop. The chillers do not have to be equally sized. The CSM com-municates with the chillers through the CCN Communication Bus.

An example of a CHILLERVISOR system layout is shown in Figure 1.

Introduction

3

Figure 1Sample CHILLERVISORSystem Layout

Note: You should install all chiller plant controls on a dedicatedCCN bus. Use a CCN Bridge if the overall CCN networkcontains elements other than those directly associated withthe chiller system.

32MPGatewayCSM III

17/19 SeriesChiller with

3200MP/ESP IIController

CCN Bus

ComfortWORKSor

BuildingSupervisor

19XR19XR 19XRAutodialGateway

Data Collect/Data Xfer

30 SeriesFlotronic/

ProDialog II

ComfortController

(cooling towercontrol)

ComfortController

(pump control)

4

Further information that may be helpful to you can be found in thefollowing documentation:

• ComfortWORKS Operation Manual (808-902)

• Building Supervisor IV Operation Manual (808-981)

• 32MP Gateway Overview and Configuration Manual (808-824)

• 19 EX PIC CCN Supplement (808-878)

• 19XL PIC CCN Supplement (808-814)

• 23XL PIC CCN Supplement (808-825)

• Flotronic II Phase 3 PIC CCN Supplement (808-887)

• Water System Manager Overview and Configuration Manual(808-734)

• Loadshed Option Overview and Configuration Manual (808-855)

• Data Collection III Overview and Configuration Manual (808-705)

• Data Transfer Option Overview and Configuration Manual(808-557)

The CSM is a CCN module equipped with specialized software thatenables it to perform its control functions.

The CSM is shown in Figure 2. The CSM communicates with otherCCN system elements on the CCN Communication Bus through a3-pin, Phoenix-type connector at the bottom rear of the module. TheCSM communicates with its optional module, if present, on the I/Obus through a 3-pin, Phoenix-type connector at the bottom center ofthe module.

Sensors are connected to the input and output connectors as indi-cated in Table 1 in the Hardwired Temperature Sensors Configura-tion section.

Other RequiredDocumentation

CSM III Hardware

5

Figure 2CHILLERVISOR

System

Manager III

The Supply Water Temperature sensor is critical to the operation ofthe CSM. This sensor is located in the common supply header, at apoint where water mixing conditions are optimum.

This sensor provides the basic start/stop sequencing function of theCSM. It may be one of the following sensor types:

• Standard 5K thermistor• 10K thermistor (Type III - YSI)

SensorsRequired Sensor

6

Note: Some systems may require a Return Water Temperaturesensor located in the common return header. It can be ofthe same types and be used for the same CSM functions asthe Supply Water Temperature sensor.

The Supply and Return Water Temperature sensors are wired to theCSM base module. The CSM provides an adjustable low and highlimit alarm for each sensor to indicate that the sensor value isoutside the expected operating range. The optional module providesbackup sensor capability.

Additional sensors may be required to perform certain functions.

Base module:load return temperatureload delta pressureoverride or outside air temperature (configurable)external reset inputexternal demand limitremote contact input/plant switchnormally open and normally closed alarm indicator outputs

Optional module:backup supply water temperaturebackup return water temperaturebackup load return temperaturebackup load pressureoverride or outside air temperature (configurable)optional reset temperature

• Backup load return temperature and backup load pressuresensors are backups for the optional Bypass Valve Controlfunction.

• If the Setpoint Reset function will be used, a Reset Temperaturesensor, an OAT sensor, or an external reset input will be re-quired. The external reset input can be used by another controlsystem for this function.

• If the Temperature Override function will be used, an overridesensor or OAT sensor will be required. An OAT sensor can be

Optional Sensors

7

hard wired to the CSM, or a reading can be broadcast to theCSM by another CCN system element.

• The external demand limit input can be used by another controlsystem for the Demand Limiting function (4 mA=configuredlow input value, 20 mA=configured high input value).

• The remote contact input sensor can be used by another controlsystem to determine plant start/stop (sets Cooling Active). Thisinput point can optionally be configured as a plant switch toenable or disable the CSM programs (sets Program Status).

Every sensor must be configured in the SENSORS1 or SENSORS2service table. If any sensor fails, the CSM will automatically sendan alarm. If a sensor fails and there is a backup present, the controlwill automatically switch to the backup. If the supply or return watertemperature sensor fails, the CSM will average chiller leaving orentering chilled water temperature if possible. If any other sensorfails, the CSM will disable the associated functions, and continue tooperate as if they had not been configured. The functions will returnto operation when the sensor returns to normal.

The return to operation does not apply to the CSM if it disablesitself due to any of the following alarm conditions:

• Supply or return water temperature sensor failure• Invalid CSM module time• No chillers configured• Invalid chiller configuration• Invalid chiller sequence configuration

If the CSM does disable itself as a result of an alarm, you will haveto re-enable the CSM by accessing the System Points Display Tableand entering Enable in the Program Status point when the alarmcondition has been corrected.

ComfortWORKS and the Building Supervisor are the primaryoperator interfaces to the CSM. A Network Service Tool or centrifu-gal chiller local interface device can also be used. Once a CSM isconnected to the CCN Communication Bus, you must add andupload the CSM’s configuration data to the ComfortWORKS orBuilding Supervisor database.

OperatorInterfaces

8

After adding and uploading the CSM’s configuration data, anoperator can:

• display a list of CSM points that shows the current status of thechiller system.

• modify selected points, and return them to automatic control.• display and modify (where allowed) configuration and mainte-

nance data.• create chiller system graphics.

There are five table types associated with the CSM that can bedisplayed on ComfortWORKS or a Building Supervisor:

• Points Display Tables• Configuration Tables• Service Configuration Table• Maintenance Tables• Controller Identification Table

Specific information on individual parameters displayed in thePoints, Configuration, Service Configuration, and MaintenanceTables is provided in this manual. A brief description of each tableis provided below.

The Points Display Tables display the current status of chillersystem parameters such as system status, primary and backup sensorstatus, and optional bypass valve control status.

The Configuration Tables contain data that the CSM requires tooperate such as the system element numbers of its chillers, chillercapacities, sequences, time schedule, holidays, and setpoints.

The Service Configuration Tables allow an operator to configureCSM service parameters such as capacity control, start/stop criteria,setpoint reset, sensors, bypass valves, and alarms. These tables areintended for use by service personnel during initial system setup.

The Maintenance Tables display the status of the CSM’s controlalgorithms and of the data being communicated between the CSMand the chillers, time schedules, and optional WSM. These tablesare intended as an aid to service personnel during system trouble-shooting.

9

The Controller Identification Table is a table listing CSM controllerinformation such as device name, description and location, andsoftware part numbers.

Every ten seconds the CSM collects information from its chillersand stores it in memory for use by its control algorithms. The CSMcollects the following information for each of the chillers in thesystem:

• Chiller statusThe CSM examines chiller status to determine if a chiller isavailable, unavailable (in a local or reset state), starting, running,or faulted, or if a chiller failed to start or stop.

• Chiller capacityThe CSM uses a rotary chiller’s compressor motor load %kW asan indication of its current capacity, and a chiller parametercalled Percent Available Capacity for staged chillers.

• Service runtimeService runtime values are used for monitoring purposes andwhen sequence rotation based on runtime is selected.

The CSM provides the following functions:

• Manual program enable/disable• Mixed plant capability• Chiller start/stop sequencing modes with add/drop capability• Designated standby chiller support• Cooling Active determination• Remote start contact (optional)• Temperature override function• Time schedule and time schedule override• Chiller availability determination• Control sensor determination (supply or return)• Hardwired temperature sensors configuration• OAT as control temperature• Automatic chiller start/stop• Additional Cooling Required (ACR) algorithm• Two seasonal sequencing modes• New chiller inhibit time• Capacity control algorithms

Chiller Information

CSM III Functions

10

• Optional soft start ramp loading• Setpoint reset (optional)• Demand limiting• Reduced Cooling Required (RCR) algorithm• Bypass valve control (optional)• Chiller fault determination and capacity matching• Configurable alarm limits and levels• Automatic program disabling and associated alarm conditions• Power fail restart short- and long-term logic

Each function is described in detail below.

You can enable or disable the CSM’s programs manually. TheProgram Status point (PSTATUS) in the System Points DisplayTable provides an Enable/Disable switch.

Enabling the programs allows the CSM to take control of the chillerplant. If cooling active is No, no action will be taken. If CoolingActive is Yes, CSM will assume active control.

Disabling the programs halts CSM control of the system. Allchillers are left in their last commanded states. CSM chiller controlfunctions are halted, but Points and Maintenance Table data contin-ues to be updated.

CSM provides supervisory control of up to eight chillers of anytype, for example, one or more staged chillers in a system with oneor more rotary chillers. However, all chillers must be equipped withcontrols that support the CSM.

The CSM supports two configurable chiller sequences, sequencerotation, and optional add/drop capability. Each sequence can haveone or two capacity steps. Add/drop can be configured as a singlepoint per sequence, that is, all chillers in Step 1 are stopped whenthe first chiller in Step 2 is started. Or, you can configure an add/drop chiller, usually a small one, to be started and stopped betweenthe starting of larger machines.

A configurable sequence selection type allows for seasonal systemsequencing. The first sequence is skipped and the second sequenceis used, based on outside air temperature, calendar date, or both.Note: The selection of either the first or second sequence is only

done when the CSM transitions from UNOCC (CoolingActive = Yes) to OCC (Cooling Active = No). The se-quence in effect does not change as long as the CSM staysin Cooling Active = Yes.

Manual ProgramEnable/Disable

Mixed Plant Capability

Chiller Start/StopSequencing Modes

11

Sequence rotation is configurable as either fixed sequence (norotation) or rotation based on service runtime hours. When rotationbased on runtime is selected, the chillers rotate to equalize serviceruntime, once per week at a configured time and day. However, adecision forceable by the operator can cause the CSM to resequencethe chillers at any time. The new sequence must be configured inthe Sequence Table before CSM is forced to resequence, and theoperating status must be steady state.

The CSM supports a designated standby chiller per sequence. Thischiller will be started when ACR logic determines that additionalcapacity is required, at least one chiller is faulted, and no otherchillers are available.

Cooling active is determined from the five inputs listed below:• The time schedule.• Remote contacts, if configured and closed.• Force by an operator at a human interface.• The Temperature Override function.• A WSM module present on the CCN.

When program status is enabled and Cooling Active is set to Yes,the CSM will assume active control of the plant. The current Cool-ing Active status is displayed in the Points Display Table’s CoolingActive system point (COOLING). Cooling Active modes aredisplayed in the BASEMAIN maintenance table as follows:

TIMESCHED Time schedule.REMCON Closed remote contacts.FORCE Point is forced by an operator.TEMPOVRD Temperature Override function.WSM WSM module on the CCN.DISABLED Cooling Active is disabled.

The CSM’s default configuration sets the base module’s hardwiredinput Channel 8 as a Remote Start Contact. This input is displayedin the POINTS1 points display table’s Remote Contact Input point(REMCON).

If REMCON’s point status is On (because the channel input isclosed or forced to On), the CSM will override the current schedule,causing the CSM to set the Cooling Active point, which causes the

Standby Chiller Support

Cooling Active

Remote Start Contact/Plant Switch (Optional)

12

control functions to run (if CSM is enabled) as if the time schedulewas occupied. In this case, the BASEMAIN maintenance table’sCOOLMOD point will display REMCON. If REMCON’s pointstatus is Off (because the channel input is open or forced to Off), theCSM will return to its Time Schedule function for occupancy statusdetermination.

If the CSM configuration is changed so that Channel 8 is used as aplant switch, this input will enable/disable the CSM programs at theProgram Status point (PSTATUS).

This function uses a temperature comparison to inhibit the config-ured time schedule. Either outside air temperature or an overridetemperature, obtained from a sensor hardwired to an input channelon the CSM module, is compared by the CSM to a configuredsetpoint. The sensor type wired to the CSM base or optionalmodule’s Channel 5 is configurable. During an occupied period,system startup will not occur until the temperature obtained from thesensor rises above the setpoint. The CSM stops the chiller plantwhen the override temperature is below the setpoint minus a config-ured deadband value, or when the time schedule becomes unoccu-pied.

The CSM contains a single time schedule that is used to specify thehours in which chiller plant operation is required. When the time ofday reaches a scheduled occupied time, the CSM commands thelead chiller to start. When the time of day reaches a scheduledunoccupied time, all chillers are commanded to stop at one-minuteintervals. Manual Override allows the CSM to disregard the config-ured time schedule and become occupied at any time, or to extendan occupied period. The Manual Override Hours decision (in theTime Schedule Configuration Table) can be used to enter up to fourhours of Time Override. If Manual Override is initiated during anunoccupied period, the time schedule will become occupied and theCSM will begin its normal daily operations. If Manual Override isinitiated during an occupied period, the time schedule will remain inthe occupied mode beyond the scheduled time.

For all CSM-compatible chillers: 17EX, 17TS, 19XL, 19XR,19EX, 23XL, and 30 Series chillers, a chiller will be consideredavailable for CSM control if the CCN mode has been selected viathat chiller’s Local Interface Display (LID).

Chiller AvailabilityDetermination

Temperature OverrideFunction

Time Schedule andTime ScheduleOverride

13

Note: For 30 Series Flotronic II chiller PICS, set the Minutes OffTime decision in the SETPOINT Table to a value otherthan the default, zero. Select CCN mode via the three-position switch.

Some stand-alone control functions of the chiller controller aresuperseded by CSM functions. Because of this, the followingchiller control functions should not be enabled in a CSM controlledsystem:

• Lead/Lag Option• Chilled Water Setpoint Reset• Remote Start Contact (optional)• Demand Limiting Option (optional)

For chillers with a 3200 MP/ESP-II controller, the CSM’s ability tosend commands to a chiller is determined by the position of theLocal/Remote and Panel/Remote switches located on the 3200MPController and ESP-II panel. A chiller will be considered availablefor CSM control only if both these switches are in the Remoteposition.

For the CSM to restart chillers after a power failure, the chillercontrol should be configured for auto restart after power failure. Ifthe CSM is not able to communicate with a newly configuredchiller, the status remains set to Unavail.

You can configure either the supply or return water temperaturesensor to be the start/stop control sensor. The default control sensor(supply temperature) is preferred for most applications.

The CSM’s primary temperature sensors are hardwired to the basemodule’s input channels, and the optional temperature sensors arehardwired to the Optional module’s input channels. Refer to Table 1below. You must configure the sensor types in the Sensor Configu-ration Table (SENSORS1 for the base module sensors, SENSORS2for the optional module sensors). For a description of each configu-ration decision, refer to the Sensor Configuration Tables in theService Configuration Table Decisions chapter of this manual. Thetemperatures are displayed on the POINTS Screens. POINTS1displays temperatures for the base module sensors; POINTS2displays temperatures for the optional module sensors.

Hardwired TemperatureSensors Configuration

Control SensorDetermination

14

Channel Desc. Sensor Type/Terminal Number

Therm 4- Disc Dry

20mA Contacts

(5K/10K) (+)(-)

Base Module1 Supply Temperature 1,22 Return Temperature 3,43 Load Return Temp 5,64 Load Delta Pressure 7,85 Override/OA Temp* 9,106 External Reset Input 11, 127 External Demand Limit 13, 148 Remote Contacts Input/ 15, 16

Plant Switch**

Optional Module1 Backup Supply Temp 1,22 Backup Return Temp 3,43 Backup Load Ret Temp 5,64 Backup Load Pressure 7,85 Override/OA Temp* 9,106 Optional Reset Temp 11, 12Note: 10K sensors should be Type III (YSI) sensor types.

*Channel 5 on either module can be used as either a TemperatureOverride or OAT sensor, depending on configuration.** See wiring diagram in Figure 3 below.

Channel Desc. Output Type/Terminal No.

24 Vdc Relay (+)(-)

9 Normally closedAlarm Status 24 Vdc/80mA 1, 2

10 Bypass Valve 1 4-20 mA 3, 411 Bypass Valve 2 4-20 mA 5, 616 Normally Open

Alarm Status 24 Vdc/80mA 15, 16

Table 1Base Module and

Optional Module Inputs

Table 2Base Module Outputs

15

The CSM gives you the capability to use the Outside Air Tempera-ture (OAT) as the control temperature for the Temperature Overrideor Setpoint Reset functions.

The OAT sensor is usually hardwired to the CSM, but some systemsbroadcast OAT on the CCN. In those systems, the CSM will use thebroadcast OAT temperature. If the broadcasting device stopssending OAT, the CSM will retain the last value that was broadcast.

The CSM starts and stops lead and lag chillers in different ways.When Program Status is Enable and Cooling Active is set to Yes, thelead chiller is started. Program status is manually enabled by theuser when the CSM is required to control the chillers. CoolingActive is enabled by the time schedule, remote contact closure,force, or WSM.

Lag chillers are started and stopped while Cooling Active is Yes bythe CSM’s Additional Cooling Required (ACR) and ReducedCooling Required (RCR) algorithms, based on system conditions.When Cooling Active returns to No, for example, when the timeschedule reaches the unoccupied time, all chillers are stopped at oneminute intervals in reverse of the starting order.

Once the lead chiller has been started, no additional chillers can bebrought on until the Pulldown Time has expired. Pulldown Timeallows the lead chiller to cool the building’s water loop and preventsthe starting of unnecessary additional machines.

If add/drop sequencing is used (add/drop chiller number specified inCapacity Step 1, and add/drop operation selected), the add/drop willbe started between the other chillers for an increase in building load,and it will also be turned on/off between the other chillers as build-ing load decreases.

Figure 3Remote Contact/PlantSwitch (REMCON) WiringDiagram

Note: Contact impedance 3 KΩ maximum.

CSMJ-3

DICONTACTS

15(+)

16(-)

Outside AirTemperature

Automatic ChillerStart/Stop

Add/DropSequencing

16

The ACR algorithm determines when lag chillers should be started.The algorithm requires that the following criteria be met before a lagchiller is started:

1. The current ACR control sensor temperature value must beabove the Current CHW Setpoint (BASEMAIN MaintenanceTable) + ACR Setpoint Delta T.

2. The CSM current demand limit is greater than the ACRDemand Limit. The current demand limit is the value that theCSM sends to the chillers, not the per cent load at which theyare running.

3. The temperature pulldown rate is less than the configuredPulldown Rate Limit. The pulldown rate is calculated every10 seconds, linearized on the last 10 control temperaturesensor samples. This is an indication that the chillers pres-ently running do not have enough cooling capacity to reducethe system water temperature to the setpoint value.

4. If bypass valve control is configured and all chillers have thesame configured capacity, Flow Bypassed (BYPASS PointsDisplay Table) must not exceed 80%.

5. The above conditions must remain true for the Lag StartDelay Time. The CSM will decrement the Time To StartChiller point (in the BASEMAIN Maintenance Table) andissue a Start command to the next chiller to be started (if oneis available) when it reaches zero.

6. No chiller is in low load recycle.

The CSM will then check if the chiller has actually been started byreading the chiller status until the configured Start Fault Time haselapsed. If, after the delay, the chiller has not started, the chiller willbe in Failstart mode and the next available chiller will be requestedto start. The chiller that fails to start cannot be started again by theCSM until the operator manually changes the condition by forcingthe Clear Failstart Chillers display parameter to Yes.

Only lag chillers are subject to the ACR task. Lead chiller start isdetermined by the Cooling Active status. The chillers’ startingsequence is initially determined by the sequence configuration;however, it can be changed dynamically if the lead chiller faults orif Rotate By Runtime is performed.

Additional CoolingRequired (ACR)Algorithm

17

ACR AlgorithmExample

Note: If an add/drop chiller is configured, it will be started andstopped between the other chillers as building load in-creases.

This example assumes the following:

• A configured chiller sequence of 12345678.• Chillers 1 and 2 are running.• Chillers 3 and 4 are available.

Refer to Table 3 to determine the configured values of the servicetable’s decisions.

Configuration Decision Configure Value

Control Sensor is CHWST 0Current CHW Setpoint 45°FACR Setpoint Delta Temp 1°FBypass Valve Control Type 1ACR Demand Limit 95%Pulldown Rate Limit 0.5°F/min

Note: CHWST temperature is at 50°F and increasing slowly, by0.02°F every 10 seconds.

1. Condition 1 is true because CHWST value is 50°F, which isgreater than 45°F + 1°F.

2. Condition 2 is true because present demand limit – the valueCSM sends, not the chiller's actual % load – is 97%, whichis greater than the ACR Demand Limit (95%).

3. Condition 3 is true because the pulldown rate is 0.02 * 6 =0.12°F/minute, which is less than the Pulldown Rate Limit(0.5 °F/min).

4. Condition 4 is true because Flow Bypassed is 75%, which isless than 80%.

5. Condition 5 is true because the above conditions remain truewhile the CSM is decrementing the lag start timer.

6. Condition 6 is true because no chiller is in low load recycle.

While ACR conditions are met, the ACR Conditions True mainte-nance point will display Yes. If the ACR conditions are not met, theACR point will display No.

Table 3Configured Values for

ACR Algorithm Example

Table 4Lag Chiller Start Criteria

for ACR Algorithm

Example

18

After Time to Start Chiller expires, the CSM starts Chiller 3 (thenext chiller available to start). If it reads back a Running statusbefore the Start Fault Timer (Chiller Configuration Table, CHILL-ERS) has elapsed, the ACR algorithm will compare the start criteriaagain and determine if Chiller 4 is also required to start.

Two configurable sequencing types are provided to determine thechiller starting sequence: fixed (no rotation) and Rotate by Runtime(runtime equalization).

In the fixed sequencing mode the CSM will implement the sequenceconfigured in the Service Configuration Table (SERVICE). Thissequence will be implemented once a week at the specified Se-quence Rotation Time on the Sequence Rotation Day. This allowsyou to pre-configure a desired sequence.

In the runtime equalization mode the elapsed on-times of the chillersare compared to determine the new sequence. This is done once aweek at the specified Sequence Rotation Time on the SequenceRotation Day. The chiller with the lowest elapsed on-time becomesthe lead, the second lowest becomes the first lag, etc. In this mode,the sequence specified in the Service Configuration Table providesthe initial sequence only.

A method for immediately implementing a new sequence is alsoprovided. The Resequence Chillers Now decision allows you to re-sequence the chillers at any time. When this decision is enabled, thechillers are immediately re-sequenced.

Regardless of whether fixed sequencing or runtime equalization isused, it is important to remember that the sequence actually in effectmay differ from the initially configured sequence. The configuredsequence can be altered automatically by the CSM’s fault handlinglogic (the lead chiller only is rotated to the end of the current se-quence if its status is Faulted). The sequence that is currently ineffect is displayed on the System Points Screen as Current Leadthrough Current 7th Lag Chiller.

ACR SequencingModes

19

You may wish to prevent any additional chillers from being startedwhen the time of day is approaching the scheduled unoccupied time.A configurable Chiller Inhibit Time is provided for that purpose.This is the amount of time (up to four hours) prior to unoccupiedtime during which no additional chillers will be commanded to start.This function is applicable only when Cooling Active control isbased on Time Schedule. It is not applicable for Cooling Activedetermined by remote contacts or WSM.

CSM allows two types of capacity control to maintain the systemChilled Water Setpoint:

1. Current CHW Setpoint is sent to all chillers along withsystem demand limit (100% unless ramping or forced). Youcan apply a PI calculation to modulate the setpoint, but this isusually not necessary.

2. A PI calculation is used to determine the %kW the chillersmust run at to maintain setpoint. This is called kW balancing.PI calculated demand limit is sent to the chillers along withMinimum Control Point.

If kW Balancing is disabled (Capacity Control Type 1), the CurrentControl Point is sent to the chillers instead of the Minimum ControlPoint, and each will then control to that temperature setpoint regard-less of the %kW (up to the System Demand Limit) required toachieve it.

In both types of capacity control, the proportional term is an instan-taneous linear correction. The integral term is a running sum cor-rection over time. Every 10 seconds (Type 1) or every 2 minutes(Type 2), the proportional and integral terms are calculated. Thenew proportional term replaces the previous one, while the newintegral term is added to the previous one.

The proportional term is found by multiplying the error (the differ-ence between the Current CHW Temperature and the Current CHWSetpoint) by the proportional gain. The integral term is found bymultiplying the same error by the integral gain. You can configureboth the proportional and integral gains.

New Chiller Inhibit Time

Capacity Control

20

After Pulldown Time (refer to the Automatic Chiller Start/Stopfunction described earlier in this chapter) has expired, the CSMperforms a calculation to determine the Current Control Point thatmust be sent to the chillers in order to maintain the Current CHWSetpoint. Current Control Point is typically the same value as theCurrent CHW Setpoint, though a PI calculation can be applied ifsystem conditions require it. In that case, the Current Control Pointshows the PI calculated value. For most systems, the KP and KIgain values can be left at the default of 0. This will result in theCurrent CHW Setpoint being sent to all the chillers. The chillerdemand limiters are updated every ten seconds. Every two minutes,the Current Control Point is sent to the chillers. The Current Con-trol Point is set to the Minimum Control Point.

In the case where the PI loop is used (Pgain or Igain>0), the CurrentControl Point is a summation of a proportional term and an integralterm. The proportional and integral terms are summed and thenadded to the Current CHW Setpoint to determine the Current Con-trol Point. The calculated value cannot be less than the MinimumControl Point, and it must be within 5 ˚F of the Current CHWSetpoint.

The CSM will balance the system by %kW if Capacity ControlType 2 is selected in the Service Configuration Table.

If this function is enabled, the chiller on line capacity is controlledby a Proportional/Integral loop that calculates the chiller demandlimit (%kW) required to maintain the Current CHW Setpoint. Thechiller demand limiters are updated every ten seconds. Every twominutes, the Current Control Point is sent to the chillers. TheCurrent Control Point is set to the Minimum Control Point. Thisforces the chillers to attempt to provide cold water at the MinimumControl Point, which they will not be able to achieve because of thedemand limit imposed on them, thereby balancing the system.

When additional chillers are required, the CSM commands allrunning chillers to unload to a calculated %kW in preparation forstarting another chiller. The calculated %kW causes the system,including the new chiller, to run at the same on line capacity as itwas before the new chiller was started, in order to provide a smooth

Type 1 (ChillerControl Point)

Type 2 (kW Balancing)

Ramp Loading

21

transition. Once the chiller start has been confirmed, all demandlimiters are ramped up at the configured Ramp Rate. This is calledsoft loading and is done to reduce wear and to help ensure that thebuilding load is evenly distributed among the chillers.

The Ramp Rate is the rate used to load the chillers after start-upapplied to the demand limit that is sent to each chiller. Although theunits for the Ramp Rate decision are specified as %kW per minute,it is important to note that the actual ramping of the demand limit isdone every ten seconds at one-sixth of this rate.

The chillers' demand limits are ramped to the Maximum DemandLimit (100% unless forced lower) for capacity control Type 1(Setpt). The Maximum Demand Limit is the maximum allowable%kW at which the chillers are allowed to run. For capacity controltype 2 (kW balancing), it ramps to 80%, at which point PID controlbegins. The CSM Status maintenance parameter is Ramping whilethis occurs.

Chilled Water Setpoint Reset is an optional energy saving functionthat automatically resets the configured Chilled Water Setpoint to ahigher value based on one of the following temperature inputs:

• OAT• An optional reset temperature sensor of your choice (requires an

optional CSM module).• A 4-20 mA external signal hardwired to an input channel.

The modified setpoint (including reset) is displayed as CurrentCHW Setpoint in the BASEMAIN Maintenance Table.

If Setpoint Reset is enabled (the Reset Type has been selected in theSERVICE Table and a valid input signal is present), the CSM willautomatically reset the Chilled Water Setpoint.

Setpoint Reset(Optional)

22

Figure 4Reset Types

LOW SETPOINT

HIGH SETPOINT

RESET

STOPINPUTSTART• ••

•

mA

POSITIVE

˚FULL RESET

RESET TYPE 3

LOW SETPOINT

HIGH SETPOINT

RESET

STARTINPUTSTOP•

•

•

•

•

•

OAT/OPTIONALRESET TEMP.

NEGATIVE

˚FULL RESET

RESET TYPES 1 AND 2

23

The following decisions must be configured in order to performChilled Water Reset:

• Reset Type

• Start Temperature

This is the temperature measured by the reset sensor, at whichreset begins.

• Stop Temperature

This is the maximum temperature reached by the reset sensor, atwhich reset stops.

Note: The Start Temperature and Stop Temperature decisions donot apply to Reset Type 3 (external reset input).

• Degrees Full Reset

This is the maximum number of degrees that can be added to theconfigured Chilled Water Setpoint regardless of the temperatureat the reset sensor.

Chilled Water Reset is disabled if one of the following conditionsexists:

• Reset type = 0

• The reset sensor failed (Temp input -40 or 245°, mA input < 3mA or > 21 mA).

• Degrees Full Reset is set to 0

• Start Temperature and Stop Temperature are the same value (forReset Types 1 and 2)

• WSM is enabled

24

The demand limiting function allows the CSM to reduce chiller plantelectrical power usage. The CSM can perform demand limiting intwo ways: manually and in conjunction with a CCNLoadshed Option.

Manual demand limiting can be accomplished by lowering the valuein the Maximum Demand Limit decision in the BASEMAIN Mainte-nance Table to reduce the chiller plant’s output and power usage. Toprevent any additional chillers from starting, force Maximum De-mand Limit to less than the ACR Demand Limit.

The CSM can also perform automatic demand limiting when used inconjunction with the CCN Loadshed Option. The CSM can thenrespond to two levels of demand limiting, Redline and Loadshed.When a Redline command is received from the Loadshed Option, theCSM will set the demand limiter on each running chiller at its currentoperating %kW and no additional chillers will be allowed to start.When a Loadshed command is received, the CSM will lower thedemand limiter on each running chiller by the configured LoadshedDemand Limit Decrease.

If the CSM receives Redline or Loadshed commands while rampingis in progress, these commands will not be acted upon until rampingis completed. This allows the system to stabilize before outputreductions occur.

For more information, refer to the Loadshed Option Overview andConfiguration Manual.

The RCR algorithm determines when lag chillers can be stopped.This algorithm requires that the following criteria be met before a lagchiller can be stopped:

1. The average chiller load of all running chillers (AVGLOADpoint in the BASEMAIN Maintenance Table) must be lessthan or equal to the RCR Corrected Setpoint (RCRCSET pointin the BASEMAIN table).

2. The selected Current CHW Temperature value (BASEMAINMaintenance Table) is less than the Current CHW Setpointvalue + [Setpoint Delta T (SERVICE Table) * 0.6].

Demand Limiting

Reduced CoolingRequired (RCR)Algorithm

25

3. The above conditions must be true for the Lag Stop DelayTime (SERVICE Table). The RCR algorithm will decrementthe Time to Stop Chiller timer (BASEMAIN MaintenanceTable) while checking that all conditions remain true. Whenthe timer reaches 0, the next chiller will be stopped.

The RCR Corrected Setpoint is calculated as the sum of the RCRuncorrected setpoint and a correction term that provides a linearapproximation of a non-linear function (the relationship between%KW and chiller load).

The RCR correction term is used to raise the RCR setpoint so that achiller can be stopped at a higher load. The correction term providesa linear approximation of the relationship between motor current andbuilding load for centrifugal chillers. The non-linear relationshipmeans that a chiller can be stopped at a higher % load and there maybe enough capacity in the remaining chillers to satisfy the buildingload. For centrifugal chillers, the correction term could be as high as15% or more. For screw and reciprocating chillers, the correctionterm would normally be a low number, or 0%. The correction termcan also be used to compensate for systems with chillers of greatlyunequal capacities. System operations should be monitored andadjustments made by the operator for optimum results.

Corrected RCR Setpoint= Uncorrected RCR setpt + Correction term

Uncorrected RCR setpoint is calculated as follows:

UncorrectedRCRsetpt = CapacityN-1

* 100 - RCR Hysteresis __________________________________________________

CapacityN

where CapacityN is the sum of the capacities of all running chillers,

and CapacityN-1

is the sum of the capacities of all running chillers less

the capacity of the next one to be stopped.

Note: If an add/drop chiller is configured, it will be started andstopped between the other chillers as building load de-creases.

26

Figure 5Correcting RCR Setpoint

0 %

RCRCORRECTION TERM(SERVICE TABLE)

90%40 %AVGKW

CORRECTIONTERM

Only lag chillers are subject to RCR. Lead chiller stop is primarilydetermined by Cooling Active, although the lead chiller can shut itscompressor off under low load (Recycle state) or fault conditions.When Cooling Active transitions to No, the CSM stops all runningchillers at one minute intervals, in reverse order of the current se-quence.

The example is based on a system where three chillers are running.

• Each chiller capacity is 100 tons (CapacityN= 300, Capacity

N-1 =200).

• Configured RCR Hysteresis is 10%.• The Average Chiller Load of all running chillers = 55%.• Configured RCR Correction Term is 5%.• Current CHW Setpoint is 45οF, Setpoint Delta T is 5^F.• Current CHW Temperature value is 47οF.

Before testing RCR criteria, the CSM first determines the RCRuncorrected setpoint, as follows :

UncorrectedRCRsetpt = CAPAN-1

* (100-RCRHysteresis) = 200*(100 - 10) = 60%CAPA

N 300

RCR Algorithm Example

27

Because Average Chiller Load (55%) is between 40% and 90%, thecorrection term will be calculated as follows:

correctionterm = RCRcorrectionfactor * (90-avgkw) = 5 * (90 - 55) = 3.5%50 50

Therefore, the corrected setpoint will be:

RCR corrected setpoint = Uncorrected RCR setpoint + correctionterm = 60 + 3.5 = 63.5%

Evaluation of Condition 1:

Condition 1 is true because the Average Chiller Load of all runningchillers (=55%) < RCR Corrected Setpoint (= 63.5).


Condition 2 is true because the Current CHW Temperature (47οF) <[ Control Setpoint (=45οF) + (Setpoint Delta T (=5^F) * 0.6 ]


RCR Conditions True will display Yes, and RCR will decrementTime to Stop Chiller and keep checking to verify that Conditions 1and 2 are still true. After the configured Lag Stop Delay Time haselapsed, the next chiller will be stopped. The specific lag chiller tobe stopped is dependent on the current sequence.

This routine controls chilled water bypass flow between the chillerplant and building piping systems. The CSM controls normally openbypass valves. The output signal modulates from 4 mA for 100%bypass flow to 20 mA for 0% bypass flow.

The bypass valve routine controls chilled water systems with eitherone or two bypass valves. The number of valves is specified in theBypass Valve Service Configuration Table. The routine opens thevalves 1 minute before any chiller is commanded to start, and every10 seconds when at least one chiller is running.

The bypass valve characteristics are configurable as follows:

• Single Bypass Valve — The CSM controls a single bypassvalve that is sized to bypass one chiller’s flow. The valve is

Bypass Valve Control

28

wired to Channel 10. The valve position (0 to 100% open) isdisplayed by the Valve 1 Output point. The Valve 2 Outputpoint displays this same value, and that point may optionally beused for a backup valve.

• Dual Bypass Valves — The CSM controls two parallel pipedvalves. One is sized for one-third of one chiller’s flow and theother sized for two-thirds. The small valve is wired to Channel10 and the large valve to Channel 11. The valve positions aredisplayed in the Valve 1 Output and Valve 2 Output points,respectively.

The Bypass Valve Control routine controls the value based on eitherdifferential pressure or differential temperature as specified in theControl Type decision (BYPASS Service Configuration Table).Each control type is described below:

• Differential Pressure Control — This control type uses the valuemeasured by the Load Delta Pressure sensor (BYPASS Points)as its input. The Control Type and the Input Low Value andInput High Value decisions (SENSORS1 Service ConfigurationTable) must be configured so the Load Delta Pressure value canbe determined. The Load Delta Pressure sensor is wired toChannel 4.

The output value is calculated by a PI loop. The differentialpressure setpoint for the PI loop is entered in the BPV Delta PSetpoint decision (SETPOINT Configuration Table) and isdisplayed as the Delta P Control Point (BYPASS Points). Thegain for the PI loop is entered in the Control Loop Gain deci-sion. This gain modifies both the proportional and integralterms.

• Differential Temperature Control — This control type uses thedifference between the chilled water return temperature andchilled water supply temperature as its input.

Note: A Return Water Temperature sensor must be installed forthis type of control.

29

The output value is calculated by a PI loop. The gain for the PIloop is entered in the Control Loop Gain decision. This gainmodifies both the proportional and integral terms.

The differential temperature setpoint for the PI loop is calculatedbased on the value entered in the System Design Delta T deci-sion as follows:

1. The CSM selects the chiller that is running at the lowestpercent capacity KW (% KW) for rotary chillers, and atthe lowest percent total available capacity for stagedchillers.

2. It calculates a new setpoint value:Differential temperature setpoint value = % capacity *System Design Delta T / 100

3. If the new setpoint value is greater than the currentsetpoint, it adds 0.1°F to the current setpoint.

If the new setpoint value is less than the current setpoint,it subtracts 0.1°F from the current setpoint.

If a new chiller has started, it uses 0°F as the setpoint forone minute. 0˚F causes the valve to drive full open.

The setpoint is displayed in the Delta T Control Point decision. Theload return temperature sensor is provided for monitoring purposesand is used as an ACR criteria for systems using this bypass valvecontrol type. Refer to the section that describes the ACR algorithm.

Regardless of the number of valves or type of control (differentialpressure or differential temperature), the CSM fully opens the valvefor one minute before it commands a chiller to start. This ensuresthat the chiller’s primary pump will have a path of low resistance toestablish flow during start-up.

The valve’s opening rate is unrestricted so the valve can openquickly when a chiller starts. The closing rate, however, is restrictedto prevent unstable operation.

30

The CSM will consider a chiller faulted if the following occurs:

• A FAULTED status is returned to the CSM by the chiller inresponse to a poll

Chillers faulted are commanded off.

Only the lead is rotated in the current sequence. For example, if thelead chiller in a four chiller system is faulted, the CSM will rotate itto the bottom of the sequence and the other chillers will be movedup. If any chiller other than the lead faults, it does not rotate.

If a running chiller faults, the CSM compares the current loadcapacity at the time of the fault to the total (configured) capacityavailable. If the faulted chiller’s capacity can be provided by theother running chillers, no additional chillers will be started. If theother running chillers cannot meet capacity, the CSM will startadditional chillers as necessary.

The CSM’s ALARMS Service Configuration Table gives you thecapability to specify the allowable limits range for some CSMsensors. This table consists of four sections:

• Alarm Realarm Time• Control Temperature Alert Hysteresis• Supply Water Temperature• Return Water Temperature• Load Delta Pressure

The last three sections consist of four decisions:

• Low Limit• High Limit• Alarm or Alert• Alarm Level

Each Low Limit decision is used to determine the lowest desirablevalue for the sensor. If the value becomes less than this limit, theCSM will generate an alert or alarm to warn you that the sensorvalue is too low. This will not affect the CSM functions.

Chiller FaultDeterminationand Handling

Hardwired SensorsAlarm Limits

31

Each High Limit decision is used to determine the highest desirablevalue for the sensor. If the value becomes greater than this limit, theCSM will generate an alert or alarm to warn you the sensor value istoo high. This will not affect the CSM functions.

The CSM contains built-in safeguards that allow it to disable itsoperating programs automatically, if necessary. These safeguardsare designed to protect the chiller plant in the event of criticalsystem errors.

The CSM sends CCN alarm or alert messages indicative of the errorcondition when such an event occurs. Alarm messages cause thenormally closed alarm output point to cycle at a 1 hertz rate (lightblinks).

Some conditions cause the CSM to disable all its functions(PSTATUS point forced to Dsable state). In these cases, you mustcorrect the system error and manually re-enable the CSM before theCSM control can be resumed. If the fault disappears by itself, theCSM will not re-enable itself automatically after it has been dis-abled. You must re-enable it manually in all cases.

Some conditions only cause a sub-function of the CSM to be dis-abled, while the main CSM controlling functions still operate(PSTATUS point is not set to Dsable state). This is the case for theSetpoint Reset and Temperature Override functions. Each isdisabled when the applicable control sensor is faulted. After thealarm condition disappears, the function will be automatically re-enabled.

Some conditions will only cause the CSM to send an alert message.No functions will be affected.

The following information is specified for each case listed on thepages that follow:

• Whether the condition is an alarm (ALM) or alert (ALRT)• Alarm/alert conditions and message• Return-to-normal (RTN) conditions and message

Automatic ProgramDisabling and AlarmConditions

32

1. Chilled Water Supply Temp Limit AlarmConditions:Program Status AND Cooling Active must be true ANDPulldown Time must be over ANDChilled Water Supply Temperature must be outside of configuredhigh/low limits

Note: Configurable Alarm/Alert and Level; default is Alarm,Level 6

Alarm Message:Alarm - 6 at time/date: CHWST Supply WaterTemperature ___ exceeds limit of ___

Rtn To Normal Message:Return to Normal at time/date: CHWST

2. Chilled Water Return Temp Limit AlarmConditions:Program Status AND Cooling Active must be true ANDPulldown Time must be over ANDChilled Water Return Temperature must be outside of configuredhigh/low limits


Alarm Message:Alarm - 6 at time/date: CHWRT Return WaterTemperature ___ exceeds limit of ___

Rtn To Normal Message:Return to Normal at time/date: CHWRT

3. Load Delta Pressure Limit AlarmConditions:Program Status AND Cooling Active must be true ANDPulldown Time must be over AND Bypass Valve Control Type = 2(delta pressure) ANDLoad Delta Pressure must be outside of configured high/low limits

CSM III Alarms

33


Alarm Message:Alarm - 6 at time/date: CHWLDP Load DeltaPressure ___ exceeds limit of ___

Rtn To Normal Message:Return to Normal at time/date: CHWLDP

4. Chilled Water Supply Temperature Sensor Failed AlarmConditions:Primary OR Backup Supply Water Temperature Sensor Type > 0ANDChilled Water Supply Temperature failed (-40 or 245 ˚F)

Alarm Message:Alarm - 2 at time/date: CHWST Supply Water Temperaturesensor failed - Program disabled

Rtn To Normal Message:Return to Normal at time/date: CHWST

5. Chilled Water Return Temperature Sensor Failed AlarmConditions:Primary OR Backup Return Water Temperature Sensor Type > 0ANDChilled Water Return Temperature failed (-40 or 245 ˚F)

Alarm Message:Alarm - 2 at time/date: CHWRT Return Water Temperaturesensor failed - Program disabled

Rtn To Normal Message:Return to Normal at time/date: CHWRT

6. Load Return Temperature Sensor Failed AlarmConditions:Primary OR Backup Load Return Temperature Sensor Type > 0ANDLoad Return Temperature failed (-40 or 245 ˚F)

34

Alarm Message:Alarm - 6 at time/date: CHWLRT Load Return Temperaturesensor failed

Rtn To Normal Message:Return to Normal at time/date: CHWLRT

7. Load Delta Pressure Sensor Failed AlarmConditions:Primary OR Backup Load Delta Pressure High Value > 0 ANDLoad Delta Pressure failed ( <3 or > 21 mA)

Alarm Message:Alarm - 6 at time/date: CHWLDP Load Delta Pressuresensor failed

Rtn To Normal Message:Return to Normal at time/date: CHWLDP

8. OAT Sensor Failed AlarmConditions:Primary OR Backup Channel 5 Sensor Type > 0 ANDPrimary OR Backup Channel 5 Sensor Select = 0 (Outside AirTemp) ANDOAT Sensor Failed (-40 or 245 ˚F)

Alarm Message:Alarm - 6 at time/date: OAT Outside Air Temperaturesensor failed

Rtn To Normal Message:Return to Normal at time/date: OAT

9. Override Temperature Sensor Failed AlarmConditions:Primary OR Backup Channel 5 Sensor Type > 0 ANDPrimary OR Backup Channel 5 Sensor Select = 1 (Override Temp)ANDOverride Temperature Failed (-40 or 245 ˚F)

35

Alarm Message:Alarm - 6 at time/date: OVRDTMP Override Temperaturesensor failed

Rtn To Normal Message:Return to Normal at time/date: OVRDTMP

10. Optional Reset Temperature Sensor FailedConditions:Optional Reset Temperature Sensor Type > 0 ANDOptional Reset Temperature Failed (-40 or 245 ˚F)

Alarm Message:Alarm - 6 at time/date: OPTRST Optional Reset Temperaturesensor failed

Rtn To Normal Message:Return to Normal at time/date: OPTRST

11. Invalid Time AlarmCondition:CSM Module has invalid time

Alarm Message:Alarm - 6 at time/date: CSMTIME CSM module time invalid -Program disabled

Rtn To Normal Message:Return to Normal at time/date: CSMTIME

12. No Configured Chillers AlarmConditions:Program Status AND Cooling Active true but thereare no chillers configured

Alarm Message:Alarm - 6 at time/date: CHILLERS No configured chillers - Pro-gram disabled

Rtn To Normal Message:Return to Normal at time/date: CHILLERS

36

13. Invalid Chiller ConfigurationCondition:Chiller configuration table misconfigured (duplicate addresses).

Alarm Message:Alarm - 6 at time/date: CHILLERS Invalid chiller configuration -Program disabled

Rtn To Normal Message:Return to Normal at time/date: CHILLERS

14. Sequence 1 AlarmCondition:Sequence 1 has an invalid configuration. Sequence configuration isinvalid if any of the following are true:

• A valid chiller number (1-8) appears more than once withineither step.

• An invalid chiller number (0 or 9) appears in either step.• The first chiller number in step 2 is also in step 1.• Both steps are blank.• There is an add/drop chiller and either step is blank.• There is an add/drop chiller and step 1 has more than one chiller

number.• The add/drop chiller number appears in step 2.• There is a standby chiller and the standby chiller number ap-

pears in either step.

Alarm Message:Alarm - 6 at time/date: SEQUENCE Sequence 1 configurationinvalid

Rtn To Normal Message:Return to Normal at time/date: SEQUENCE

15. Sequence 2 AlarmCondition:Sequence 2 has an invalid configuration. Sequence configuration isinvalid if any of the conditions listed in Case 14 above are true.

Alarm Message:Alarm - 6 at time/date: SEQUENCE Sequence 2 configurationinvalid

37


16. CSM Disabled AlarmCondition:Previous sequence alarms have been ignored and an invalid se-quence has been activated

Alarm Message:Alarm - 6 at time/date: SEQUENCE Invalid sequence - Programdisabled


17. Auto Restart AlarmCondition:No configured chillers have Auto Restart After Power Failureconfigured and a power failure has occured - CSM cannot resumeplant control

Alarm Message:Alarm - 6 at time/date: AutoPFR AutoPFR Not Configured - Pro-gram disabled

Rtn To Normal Message:Return to Normal at time/date: AutoPFR

18. Minimum LCW Setpoint Configuration AlarmCondition:LCW Minimum Control Point configured greater than CurrentCHW Setpoint

Alarm Message:Alarm - 6 at time/date: SERVICE Min LCW Setpoint configurationinvalid

Rtn To Normal Message:Return to Normal at time/date: SERVICE

38

19. Communication Failure AlarmsCondition:CSM cannot communicate with (read status data from) a configuredchiller

Alarm Message:Alarm - 6 at time/date: COMFAIL Chiller n communications failed

Rtn To Normal Message:Return to Normal at time/date: COMFAIL

20. Chiller Faulted AlarmsCondition:A configured chiller has returned a status of FAULTED

Alarm Message:Alarm - 6 at time/date: FAULTED Chiller n faulted

Rtn To Normal Message:Return to Normal at time/date: FAULTED

21. Chiller Failstop AlarmsCondition:A configured chiller has not stopped after CSM has sent a Stopcommand

Alarm Message:Alarm - 6 at time/date: FAILSTOP Chiller n failed to stop

Rtn To Normal Message:Return to Normal at time/date: FAILSTOP

22. Chiller Failstart AlarmsCondition:A configured chiller has not started after CSM has sent a Startcommand and the configured Start Fault Timer has elapsed

Alarm Message:Alarm - 6 at time/date: FAILSTRT Chiller n failed to start

Rtn To Normal Message:Return to Normal at time/date: FAILSTRT

39

Note: CCN alerts do not have associated Return To Normalmessages.

23. Setpoint Limit Exceeded AlertConditions:Program Status AND Cooling Active are true ANDPulldown Time has expired ANDCurrent CHW Temperature > Current CHW Setpoint + CHWSetpoint Hysteresis ORCurrent CHW Temperature < Current CHW Setpoint - CHWSetpoint HysteresisAlert Message:Alert - 6 at time/date: CTLTMP Current CHW Temperature ___exceeds limit of ___

24. CSM Capacity Exceeded AlertConditions:Program Status AND Cooling Active are true ANDACR Conditions are true but there are no more chillers available forCSM to startAlert Message:Alert - 6 at time/date: FULLCAP CSM capacity exceeded

Rtn To Normal Message:Return to Normal at time/date:

Power Fail Restart (PFR) provides the CSM with the ability torecover from power failures. If the CSM’s Program Status wasenabled when power was lost, the PFR function will be activatedwhen power is restored.

In order for Power Fail Restart to function, each chiller’s AutoRestart Option should be enabled. If this option is not enabled at thechillers, the chillers must be manually restarted when power isrestored. On power-up if no chillers are running, the CSM checksthe status of each chiller’s Auto Restart Option (located in eachchiller’s configuration table), and disables itself if the option is notactivated in at least one chiller. The CSM must then be manuallyre-enabled.

CSM III Alerts

Power Fail Restart

40

The CSM can recover automatically from two different types ofpower outages: loss of power to only the CSM and plant-widepower failures.

If only the CSM lost power, system control will be resumed basedon current conditions. If power to the chiller plant was lost, theCSM waits until the Power Fail Restart Delay time elapses. Then, ifthe time schedule’s status is occupied, the appropriate number ofchillers are started. If the CSM was without power for more thanthe PFR Threshold Time, the lead chiller is started but Pulldown isskipped, to allow the plant to achieve load capacity quickly. If theCSM was without power for less than the Threshold Time, the leadchiller is started and the correct number of lag chillers are startedthereafter at one minute intervals until the on-line configured capac-ity meets or exceeds the load capacity prior to the power failure.During this type of PFR recovery, chillers are not ramped and startdelay times are bypassed. If the time schedule’s status is unoccu-pied the CSM returns to its unoccupied operating mode and ensuresthat all chillers are stopped.

CCN options that are applicable to the CSM are Loadshed, DataTransfer, Data Collection, and Water System Manager (WSM).BEST and BEST++ (Building Environmental System Translator) areCarrier’s custom programming languages. Like the CCN options,they are available for use with the CSM.

The CSM interfaces with the Water System Manager (WSM)Option by acting as a cool source. The WSM supplies the CSMwith an Enable/Disable command, which the CSM uses in determin-ing its occupancy status. The WSM can also supply the CSM with aCHW Control Point value, which the CSM uses as its chiller systemsetpoint. For information on the WSM Option, refer to the WaterSystem Manager Overview and Configuration Manual.

The Loadshed Option provides automatic demand limiting to saveenergy if electrical demand exceeds configured limits. In order forthe CSM to use Loadshed, a value must be entered in the CSM’sLoadshed Demand Limit Decrease decision, and the CSM’sLoadshed Group Number must match the Loadshed Option’s Super-visory Part Number. The point name LDSHDxxE must be specified

Loadshed

Water System Manager

Network Functions

41

in the Loadshed Option’s Device tables, where xx is the LoadshedGroup Number configured at the CSM. For more information onLoadshed, refer to the Loadshed Option Overview and Configura-tion Manual.

The Data Transfer Option transmits data from or to some CSMpoints. For a list of CSM points used by the Data Transfer Option,refer to Appendix B, Network Access.

The Data Collection Option provides the capability to generatereports. Data can be collected from almost any point displayed inthe Points Display Screens. For more information on Data Collec-tion, refer to the Data Collection III Overview and ConfigurationManual.

BEST AND BEST++ can read and write to the values of some CSMpoints. The tables in Appendix B list the CSM points that can beaccessed by BEST and BEST++ on the CCN. They also indicatewhether each network accessible point is Read Only or Read/Write.

Data Collection

Data Transfer

BEST and BEST++

42

Points DisplayTable Decisions

43

Points DisplayTable Decisions

The Chiller System Manager III has a System points display table(BASESYS), two Points Display tables (POINTS1 and POINTS2),and a Bypass Valve points display table (BYPASS). Descriptions ofeach table’s individual decisions appear below.

Points display tables resemble maintenance tables. However,general system data is displayed in the points display tables, anddata specific to operation of the control algorithms is displayed inthe maintenance tables.

Use the BASESYS table to enable and disable the CSM programs,and display current system operating parameters such as lead/lagsequence and the status of chillers. Figure 6 shows the BASESYStable.

System PointsDisplay TableDecisions

44

Figure 6BASESYS PointsDisplay Table

BASESYS: Status Display

DESCRIPTION

Program Status

Program Status

Cooling Active

Alarm Status

Supply Water Temperature

Return Water Temperature

Clear Failstart ChillersResequence Chillers Now

Current Sequence NumberCurrent Step Number

UNITS STATUS FORCE NOTES

COOLING

ALARMPT

PSTATUS

CHWST

CLRFAIL

CURRSEQ

Current Lead Chiller

dF

dF CHWRT

RESEQCH

CURRSTP

CLEADCHStatus

Current 1st Lag Chiller

Status

Current 2nd Lag Chiller

Status

Current 3rd Lag ChillerStatus

Current 4th Lag Chiller

CLEADST

C1LAGCH

C1LAGST

C2LAGCH

C3LAGCHC3LAGST

Status

C2LAGST

C4LAGCHC4LAGST

Current 5th Lag Chiller

Status

Current 6th Lag ChillerStatus

Current 7th Lag ChillerStatus

StatusCurrent Add/Drop Chiller

C5LAGCHC5LAGST

C6LAGCHC6LAGST

CADDPCH

CADDPST

Current Standby ChillerStatus

C7LAGCHC7LAGST

CSTBYCH

CSTBYST

VALUE NAME

Disable

NoNormal

NoNo

Not Used

Not Used

Not Used

Not Used

Not Used

Not Used

Not Used

Not Used

Not Used

Not Used

0

0

0 0

0

0

0

0

0

0

0

0

0

0

45

This point acts as the CSM’s on/off switch. The operator uses thispoint to manually enable or disable the CSM.

When disabled, the chillers are left in their last commanded states(running or stopped). When enabled, the CSM resumes operationbased on current operating conditions.

Note: Internal fail-safe logic can disable the CSM automatically.An alarm message will be generated in that event.

You can force this point.

Display Units Enable/Disable

This point displays the current Cooling Active status. When Pro-gram Status and Cooling Active are both true, the CSM is activelycontrolling the plant.


Display Units Yes/No

This point displays the alarm status of the CSM. Whenever at leastone alarm is active, this point will display Alarm. When all alarmshave returned to normal this point will display Normal.

When it displays Alarm, the normally energized alarm output point(Channel 9) will cycle at a 1-second rate.

Display Units Normal/Alarm

Current system supply water temperature is measured in thesystem's common supply header or is forceable. If the base moduleSupply Temperature sensor fails, the CSM uses the temperaturefrom the backup Supply Temperature sensor, if one is installed. If abackup Supply Temperature sensor is not installed, the CSM usestemperature averaging if valid LCW readings can be obtained frommore than 50% of the running chillers.

Display Units Degrees F or C

Program Status

Cooling Active

Supply WaterTemperature

Alarm Status

46

Current system return water temperature is measured in the system'scommon return header or is forceable. If the base module ReturnTemperature sensor fails, the CSM uses the temperature from thebackup Return Temperature sensor, if one is installed. If a backupReturn Temperature sensor is not installed, the CSM uses tempera-ture averaging if valid ECW readings can be obtained from morethan 50% of the running chillers.


You can use this point to command the CSM to update the currentstart sequence. When you force this point to Yes and download it tothe CSM, the CSM resequences the chillers by runtime (if Rotate byRuntime is enabled), or reverts to the configured sequence. Afterresequencing completes, this point is reset to No.

Note: You must change the configured sequence beforeresequencing manually.

For more information on how the CSM determines the currentstarting sequence, refer to the section on chiller start/stop sequenc-ing modes in the Overview section of this manual.

Display Units No/Yes

You can use this point to clear a type of chiller fault calledFAILSTART. The CSM declares a FAILSTART fault when itcommands a chiller to start and the chiller either rejects the com-mand or accepts the command but fails to start within the config-ured start fault time. If the chiller FAULTS (a chiller status),FAILSTART is not in effect. Otherwise, when the CSM declares aFAILSTART fault, it displays the chiller status as FAILSTART inthis table.

When a FAILSTART fault occurs, inspect and repair the chiller orincrease the Start Fault Time for the chiller before clearing the faultstatus. To clear the fault status, force this point to Yes. The CSMwill then remove the FAILSTART status and reset this point to No.

Note: The FAILSTART condition will clear automatically aftera configurable time if Clear Failstart Timer is enabled.


Return WaterTemperature

Clear Failstart Chillers

Resequence ChillersNow

47

Current SequenceNumber

This point displays the number of the current active sequence. Theinitial sequences are configured in the sequencing configurationtable (SEQUENCE). If this decision is 0, then a starting sequencehas not yet been selected.

Display Units 0 to 2

This point displays the current active step of the active sequence. Ifthis decision is 0, then a starting sequence has not yet been selected.


This point displays the number of the system's lead chiller.


This point displays the current status of the system's lead chiller.

Display Units AVAIL Off, available for startingRUNNING Running normallyRECYCLE Low load recyclingUNAVAIL Unavailable, chiller under

local control or in alarm stateRESTART Restarting after power failureFAULTED Safety shutdownCOMMFAIL CSM cannot communicate

with the chillerNOT USED No chiller configured for this

numberFAILSTOP Failed to stop in 5 minutesFAILSTRT Failed to start in Start Fault

Time, but not faulted

Note: As an initial condition, or if the CSM has never communi-cated with a chiller, the status is NOT USED.

Current Step Number

Current Lead Chiller

Current Lead Status

48

These points display the chiller numbers of the lag sequence that iscurrently in effect. The numbers displayed here are assigned tospecific chillers by the Chiller 1 through Chiller 8 Element Numberdecisions in the CHILLERS Configuration Table.


These points display the status of the chillers in the lag sequencethat is currently in effect.

Display Units Refer to Current Lead Chiller Status

This point displays the number of the add/drop chiller configuredfor the current sequence, if any.


This point displays the status of the add/drop chiller configured forthe current sequence, if any.


This point displays the status of the chiller currently configured asthe standby chiller. This chiller will be started when the ACRalgorithm determines that additional capacity is required, at leastone chiller is faulted, and no other chillers are available.


This point displays the status of the chiller currently configured asthe standby chiller.


Current 1st through 7thLag Chiller

Current 1st through 7thLag Status

Current Add/DropChiller

Current Add/DropStatus

Current Standby Chiller

Current Standby Status

49

Use the POINTS1 Display Table to display current system operatingparameters for primary sensors (sensors wired to the base CSMmodule), such as the primary supply water temperature.

Note: Unused temperature sensors (sensor type = 0) display -40˚and other unused sensors display 0.

Sensors are configured in either the SENSORS1 or SENSORS2Service Configuration Table.

Figure 7 shows the POINTS1 Display Table.

POINTS1 DisplayTable Decisions

Figure 7POINTS1 Display Table

POINTS1: Status Display

DESCRIPTION

Base Module Points

Supply Temperature

Supply Temperature

Return Temperature

Load Delta Pressure

Load Return Temperature

External Reset InputOverride/OA Temp

External Demand InputRemote Contact Input

UNITS FORCE NAME NOTES

dF

PCHWRT

PCHWST

PCHWLDP

REMCON

dF

dF

dF

mA

POVRTOAPSI

mA

PCHWLRT

RSTINPT

DEMINPT

VALUE STATUS

-40.0

-40.0

-40.0

-40.0

0.0

0.0

0.0Off

50

This point displays the value of the common header supply watertemperature sensor wired to base module input Channel 1. There aretwo possible input sensor types:

• Standard 5K Thermistor• 10K Thermisto (Type III - YSI)


This point displays the value of the return water temperature sensorwired to base module input Channel 2. It has the same input sensortype possibilities as the Supply Water Temperature sensor.


This point displays the temperature of the water leaving the load.The CHW load return temperature sensor is located in the commonreturn header upstream of the bypass line and wired to base moduleinput Channel 3. It has the same input sensor type possibilities asthe Supply Water Temperature sensor. This is an optional sensorused only in bypass valve applications, when all chillers are of thesame capacity, or for monitoring.


This point displays the differential pressure across the chilled watersupply and return headers from base module input Channel 4. Thisoptional sensor can be used as input for bypass valve control basedon differential pressure.

When a CHW differential pressure sensor is used, you configure theconversion values for scaling mA into psi in the SENSORS1 Ser-vice Configuration Table.

Display Units psi or kPa

Supply Temperature

Return Temperature

Load ReturnTemperature

Load Delta Pressure

51

This point displays the value of the Temperature Override sensor orOutside Air Temperature sensor wired to base module input Chan-nel 5. You select the sensor type in the SENSORS1 Service Con-figuration Table. Both have the same input sensor type possibilitiesas the Supply Water Temperature sensor.

If used for OAT, this point can be used as the source or target for anetwork OAT broadcast. It can also be used as one of twoconfigurable inputs to the Time Schedule Override function, or asone of three configurable inputs to the Setpoint Reset function.


This point displays the value of an optional external reset input,which is wired to base module input Channel 6. This point is usedas one of three configurable inputs to the Setpoint Reset function.The points External Reset Input, External Demand Input, andRemote Contact input are used by an external control system tocontrol the chiller plant.

When an External Reset Input is used, this value is converted to aSetpoint Reset value in ˚F. You configure the conversion value forscaling mA into ˚F in the SERVICE Service Configuration Table.


Display Units 0.0 to 20.0 mΑ

This point displays the milliamp value from an optional ExternalDemand Limit Input, wired to base module input Channel 7. Thepoints External Reset Input, External Demand Input, and RemoteContact input are used by an external control system to control thechiller plant.

When an External Demand Limit Input is used, this value is con-verted to a Plant Demand Limit value in %. You configure theconversion values for scaling mA into % in the SENSORS1 ServiceConfiguration Table.


Display Units 0.0 to 20.0 mA

Override/OA Temp

External Reset Input

External Demand Input

52

This point displays the status of the Remote Contact Input drycontacts, Channel 8. It is used to override the time schedule. Ifthis input is On, then Cooling Active is True. If this input is Off,then it is not used to determine Cooling Active. The points ExternalReset Input, External Demand Input, and Remote Contact input areused by an external control system to control the chiller plant.

This input can also be used as a Plant Switch, which sets ProgramStatus instead of Cooling Active, if configured to do so in theSENSORS1 Service Configuration Table.


Display Units On or Off

Use the POINTS2 Display Table to display current system operatingparameters for optional module sensors, such as backup supply andreturn water temperatures. Figure 8 shows the POINTS2 DisplayTable.

Note: Unused temperature sensors (sensor type = 0) display -40˚and other unused sensors display 0.

Sensors are configured in either the SENSORS1 or SENSORS2Service Configuration Table.

Remote Contact Input

POINTS2: Status Display

DESCRIPTION

Optional Module Points

Supply Temperature

Supply Temperature

Return Temperature

Load Delta Pressure


Optional Reset TempOverride/OA Temp


dF

BCHWRT

BCHWST

BCHWLDP

dF

dF

dF

dFBOVRTOA

PSI

BCHWLRT

OPTRSET

VALUE STATUS

-40.0

-40.0

-40.0

-40.0-40.0

-0.0

Figure 8POINTS2 Display Table

POINTS2 DisplayTable Decisions

53

This point displays the value of the backup common header supplywater temperature sensor wired to optional module input Channel 1.There are two possible input sensor types:

• Standard 5K Thermistor• 10K Thermistor (Type III - YSI)


This point displays the value of the backup return water temperaturesensor wired to optional module input Channel 2. It has the sameinput sensor type possibilities as the Supply Water Temperaturesensor.


This point displays the temperature of the water leaving the load.The backup CHW load return temperature sensor is located in thecommon return header upstream of the bypass line and wired tooptional module input Channel 3. It has the same input sensor typepossibilities as the backup Supply Water Temperature sensor. Thisis an optional sensor used only in bypass valve applications, whenall chillers are of the same capacity, or for monitoring.


This point displays the differential pressure across the chilled watersupply and return headers from optional module input Channel 4.This backup sensor can be used as input for bypass valve controlbased on differential pressure.

When a backup CHW differential pressure sensor is used, youconfigure the conversion values for scaling mA into psi in theSENSORS2 Service Configuration Table.

Display Units psi or kPa

Supply Temperature

Return Temperature


Load Delta Pressure

54

This point displays the value of the backup Temperature Overridesensor or backup Outside Air Temperature sensor wired to optionalmodule input channel 5. The function of this channel depends uponhow channel 5 in the base module is configured (see the table below).

Base Module Option Module Option ModuleCh. 5 Config. Ch. 5 Config. Ch. 5 Function

None None NoneNone OAT Primary OAT sensorNone Override Primary override sensorOAT None NoneOAT OAT Backup OAT sensorOAT Override Primary override sensorOverride None NoneOverride OAT Primary OAT sensorOverride Override Backup override sensor

You select the sensor type in the SENSORS2 Service ConfigurationTable. Both have the same input sensor type possibilities as theSupply Water Temperature sensor.

If used for OAT, this point can be used as the source or target for anetwork OAT broadcast. It can also be used as one of twoconfigurable inputs to the Time Schedule Override function, or asone of three configurable inputs to the Setpoint Reset function.


This point displays the value of the optional Reset Temperaturesensor, wired to optional module input channel 6. It has the sameinput sensor type possibilities as the Supply Water Temperaturesensor.

This point is one of three configurable inputs to the Setpoint Resetfunction, for setpoint reset based on a temperature input other thanOAT or a 4-20 mA external signal.


Override/OA Temp

Optional Reset Temp

55

Use the BYPASS Display Table to display current system operatingparameters for optional bypass valves, such as load return watertemperature, flow bypassed, and valve outputs. Figure 9 shows theBYPASS Display Table.

BYPASS PointsDisplay TableDecisions

Figure 9BYPASS PointsDisplay Table

BYPASS: Status Display

DESCRIPTION


Current Delta T

Current Delta T

Delta T Control Point

Load Delta Pressure

Delta P Control Point

Flow BypassedLoad Return Temperature

Valve 1 Output

Valve 2 Output


%

CDELTAT

DTCTLPT

CHWLDP

FLOWBYP

BPV1OUT

^F

^F

PSI

PSI

dF

%

DPCTLPT

CHWLRT

BPV2OUT

%

VALUE STATUS

0.00.0

0.00.0

-40.00

0

0

Algorithm Status NONE BPVSTAT

56

This point displays the current status of the bypass valve controlalgorithm.

Display Units NONE Bypass valve control is disabledFORCE Either bypass valve output is forcedNO CHLRS No chillers are commanded onCHLRSTRT A new chiller is starting upALARM An alarm condition exists, depending

on Control Type.For Type 1 (Delta temperature):Either the CHWS Temp or LoadReturn Temp sensor is failed.For Type 2 (Delta pressure), the deltapressure sensor is failed.

NORMAL Bypass valves are under CSM controlCLOSING A valve is closing, but rate restrictions

are in effect. The valve closing rate islimited to 20% per 10 seconds.

This point applies only when the Control Type decision is set to 1(differential temperature control) and a Return Water Temperaturesensor is installed.

This calculated value displays the entering to leaving water tempera-ture difference (the current chilled water system temperature rise).

This value is used to calculate the setpoint for the bypass valve PIloop. For more information, refer to Bypass Valve Control in theOverview section of this manual.

Display Units Delta degrees F or C

This point applies only when the Control Type decision is set to 1(differential temperature control).

It displays the internally calculated differential temperature setpointthat the bypass valve PI loop is currently using. This value is deter-mined as a function of chiller loading and the configured SystemDesign Delta T. For more information, refer to Bypass Valve Con-trol in the Overview section of this manual.


Current Delta T

Delta T Control Point

Algorithm Status

57

This point applies only when the Control Type decision is set to 2(differential pressure input).

This point displays the differential pressure across the chilled watersupply and return headers from input channel 4 of the base module(primary) or option module (backup). This sensor can be used asinput to control the bypass valves.

When a CHW pressure drop sensor is used, you configure theconversion values for scaling mA into psi in the SENSORS1 orSENSORS2 Configuration Table.

This point can be forced.

Display Units psi/kPa

This point applies only when the Control Type decision is set to 2(differential pressure input).

The point displays the differential pressure setpoint for the bypassvalve control routine. This setpoint is configured in the SETPOINTConfiguration Table. For more information, refer to Bypass ValveControl in the Overview section of this manual.

Display Units psi/kPa

This point applies only when all chillers have the same capacity, orif temperature monitoring is desired.

It displays the temperature of the water leaving the load. The CHWload Return Temperature sensors are located in the return pipingupstream of the bypass line. The primary load Return Temperaturesensor is wired to input channel 3 on the base module; the backupLoad Return temperature sensor is wired to input channel 3 on theoption module. Both sensors are optional.

This point can be forced.


Delta P Control Point


Load Delta Pressure

58

This point applies only when all chillers have the same capacity anda return water temperature sensor is present.

This point displays the amount of chilled water passing through thebypass line, internally calculated and expressed as the percentage ofone chiller’s design flowrate.

When the system has a bypass valve, a CHWRT sensor, and allchillers are equal size, the % of one chiller’s flow being bypassed isused as a load indication for Additional Cooling Required (ACR).Otherwise, this point can be used for monitoring.

For a complete description of ACR, refer to the Overview section.

Display Units %

This point displays the output command for Bypass Valve #1, wiredto base module output channel 10.

When Number of Valves is 2, the CSM assumes that the valves aresized for one-third and two-thirds of bypass flow. It will modulatethis valve first and only modulate Bypass Valve #2 when this valveis fully opened (100%).

When Number of Valves is 1, the CSM will modulate this valve inparallel with Bypass Valve #2 to allow for possible use of a sparebypass valve.

You can force this point from this display screen for test purposes.

Display Units %

This point displays the output command for Bypass Valve #2, wiredto base module output channel 11.

When Number of Valves is 2, the CSM assumes that the valves aresized for one-third and two-thirds of bypass flow and will modulatethis valve only after Bypass Valve #1 is fully opened (100%).

When Number of Valves is 1, the CSM will modulate this valve inparallel with Bypass Valve #1 to allow for possible use of a sparebypass valve.

You can force this point from this display screen for test purposes.

Display Units %

Flow Bypassed

Valve 1 Output

Valve 2 Output

Configuration TableDecisions

59

You select the CSM’s CHILLERS Configuration Table to configureparameters such as chiller system element numbers, and chillercapacities.

The table is shown in Figure 10 on the following page. Descriptionsof the individual decisions follow the figure. Each descriptionincludes the purpose of the decision, its allowable entries, and itsdefault value.

CHILLERSConfigurationTable Decisions

ConfigurationTable Decisions

60

Figure 10CHILLERSConfigurationTable

CHILLERS: Configuration

DESCRIPTION

Chiller 1

Element Number

Element Number

Capacity

Start Fault Timer

Chiller 2

CapacityElement Number

Start Fault Timer

Chiller 3

UNITS NAME NOTES

0

15

CHILLELE

CHILLCAP

CHILLTIM

CHILLELE

CHILLTIM

CHILLCAPElement Number

0

0

0

0

15

0

CHILLCAP

CHILLELE

CHILLTIMCapacityStart Fault Timer

Chiller 4

Element Number

CapacityStart Fault Timer

Chiller 5

Element Number

15

CHILLTIM

CHILLELE

CHILLCAP

CHILLCAPCHILLTIM

Capacity

0

0

15

0

0

0

0

CHILLELE

CHILLCAP

CHILLELE

Start Fault Timer

Chiller 6Element NumberCapacity

Start Fault Timer

Chiller 7

CapacityElement Number

15

15

CHILLTIM

CHILLTIM

CHILLELECHILLCAP

CHILLCAPCHILLTIM

Start Fault Timer

Chiller 8

00

0

CHILLELE

15

Element Number

CapacityStart Fault Timer

VALUE

15 min

0

min

min

min

min

min

min

min

61

These decisions are used to enter the element numbers of the chillersin the system. The CSM must have this information in order tocommunicate with the chillers. All chillers must be on the sameCCN Bus as the CSM.

Allowable Entries 0 = No Chiller present1 through 239 system elementnumbers

Default Value 0

The capacities (in tons or KW) of the chillers in the system areentered in these decisions. This information is used by the CSM’scontrol algorithms.

Allowable Entries 0 = No chiller present1 through 9999 tons or KW

Default Value 0

This decision specifies the time that may elapse, after a Start com-mand is sent to a chiller, until the chiller achieves the Runningstatus. The timer’s purpose is to provide a timeout in the event thereis a prestart alert condition (such as excessive starts) that mayprevent the chiller from reaching its status in a reasonable time.

If the chiller does not start or fault in this amount of time, it will beconsidered FAILSTART and the next chiller in the sequence will becommanded to start.

Allowable Entries 1 to 60 minutes

Default Value 15

Chiller 1 Through Chiller8 Element Number

Chiller 1 Through Chiller8 Start Fault Timer

Chiller 1 Through Chiller8 Capacity

62

The CSM supports two configurable chiller sequences for seasonalsequencing, and sequence rotation. Each sequence can have one ortwo steps of capacity. You can configure parameters that allow theCSM to select the active sequence.

You can also select an optional add/drop chiller. An add/dropchiller is usually a small chiller that is started and stopped betweenstarting and stopping of successive larger machines.

ChillerSequencingConfigurationTable Decisions

Figure 11SEQUENCEConfiguration Table

SEQUENCE: Configuration

DESCRIPTION

Chiller Sequence 1

Capacity Step 1

Capacity Step 1

Capacity Step 2

Add/Drop Chiller

Chiller Sequence 2

Capacity Step 2Capacity Step 1

Add/Drop Chiller

Sequence Selection

UNITS NAME NOTES

No

7

SEQSTP1

SEQSTP2

ADDRPCH

SEQSTP1

ADDRPCH

SEQSTRMSelection Type

621

0

0

SEQSTP2

SEQTYP

SEQSTRDStart MonthStart Day

Stop DayRotate By RuntimeRotation TimeRotation Day

Temperature Override

Override Type

ROTDAY

ROTRUNROTTIM

OVRDHYS

No24:00

5.0

OVRDTYP

Override Hysteresis

No

Stop Month 9 SEQSTPM

SEQSTPD

VALUE

21

^F

Standby Chiller Number 0

0

STANDBY

STANDBYStandby Chiller Number

63

To configure a system using no add/drop capability, enter chillernumbers in the initial starting order required in this step for eitherchiller sequence.

To configure a system so that all chillers in Step 1 are stoppedwhen the first chiller in Step 2 is started and running, enter thenumbers of the chillers to be started and stopped up to the end ofthis step.

To configure a system with an add/drop chiller, enter the add/dropchiller number – and no other chiller number – in this step and Yesin the Add/Drop Chiller decision below. The CSM will start andstop that chiller between the chillers configured in Step 2.

Allowable Entries 12345678

Default Value blank

Leave this step blank unless you want to stop all chillers in Step 1after the first chiller in this step is started and running, or unless youare using an add/drop chiller.

If you want to stop all chillers in Step 1 when the first chiller in Step2 is started and running, enter the sequence for that capacity stephere and set Add/Drop Chiller to No.

If you want to add/drop, enter the add/drop chiller in Step 1 and theother chillers here and set Add/Drop Chiller to Yes.

Allowable Entries 12345678

Default Value blank

Chiller Sequence 1/2Capacity Step 1

Chiller Sequence 1/2Capacity Step 2

64

Use this decision to specify that a chiller is to be added and dropped,that is, started and stopped between the starting or stopping of twolarger chillers.

Allowable Entries No/Yes

Default Value No

This decision specifies the standby chiller, if present. This chillerwill be started when ACR determines that additional capacity isrequired, at least one chiller is faulted, and no other chillers areavailable.

Allowable Entries 0 = No chiller present1 through 8

Default Value 0

This decision allows you to select Chiller Sequence 1 or 2 based onseasonal conditions. Use it to skip Chiller Sequence 1 and useSequence 2 based on OAT, calendar date, or both.

Allowable Entries 0 = Disabled (use Chiller Sequence 1)1 = Use Chiller Sequence 2 if OAT >the Sequence Select OA Setpoint2 = Use Chiller Sequence 2 if thecalendar date is between the start dateand the stop date3 = use Chiller Sequence 2 if either 1 or2 above is true

Default Value 0

Chiller Sequence 1/2Add/Drop Chiller

Sequence SelectionSelection Type

Chiller Sequence 1/2Standby ChillerNumber

65

If you set sequence Selection Type to 2 or 3, use this decision toenter the month when the CSM should begin using Chiller Sequence2.

Allowable Entries 1 – 12

Default Value 6

If you set sequence Selection Type to 2 or 3, use this decision toenter the day of the month when the CSM should begin usingChiller Sequence 2.

On this day at 12:01 a.m., the CSM begins to use Sequence 2.


Default Value 21

If you set sequence Selection Type to 2 or 3, use this decision toenter the month when the CSM should stop using Chiller Sequence2.

Allowable Entries 1– 12

Default Value 9

Use this decision to enter the day of the month when the CSMshould stop using Chiller Sequence 2.

On this day, the CSM uses Chiller Sequence 2; on the next day at12:01 a.m., the CSM returns to using Sequence 1.


Default Value 21

Sequence SelectionStart Month

Sequence SelectionStart Day

Sequence SelectionStop Month

Sequence SelectionStop Day

66

Use this decision if you want the CSM to rotate sequences based onservice runtime. When you set it to Yes, the chillers will rotate toequalize service runtime once a week at the Rotation Time and Dayspecified in the two following decisions.

Note: You can cause the current sequence to resequence at anytime by forcing Resequence Chillers Now in theBASESYS Table.

Allowable Entries No/Yes

Default Value No

Use this decision to configure the time of day when the chillersequence will be rotated. When Rotate by Runtime is set to No, theCSM will revert to the configured sequence once a week at theRotation Time and Day (fixed rotation).

Allowable Entries 00:00 through 23:59 hours

Default Value 24:00 (function disabled)

Use this decision to configure the day of week when the chillersequence will be rotated.

Allowable Entries 1 = Monday2 = Tuesday3 = Wednesday4 = Thursday5 = Friday6 = Saturday7 = Sunday

Default Value 7

Sequence SelectionRotation Time

Sequence SelectionRotate by Runtime

Sequence SelectionRotation Day

67

The Temperature Override function uses a temperature comparisonto inhibit the configured time schedule. During an occupied period,system startup will not occur (Cooling Active will be No) until thetemperature specified here goes above Temp Override Setpoint.

This decision indicates whether the temperature override functionwill operate, and which temperature input will be used in the algo-rithm. For more information, refer to the description of Time Sched-ule and Time Schedule Override function in the Overview chapterof this manual. The temperature override setpoint is configured inthe Setpoint Table.

Note: This function applies only to occupancy based control. Itdoes not apply if system start/stop is controlled by remotecontacts, WSM, or an external force.

Allowable Entries 0 = Function disabled1 = Use Outside Air Temperature (OAT)2 = Use Override Temperature (OVRT)

Default Value 0

This decision is used to enter the hysteresis or deadband value usedby Temperature Override. When the selected override temperature isbelow the Setpoint - Hysteresis, Cooling Active will transition fromYes to No, and the chiller plant will be stopped.

Allowable Entries 0 to 18^F (0 to 10^C)

Default Value 5.0 (2.8)

Temperature OverrideOverride Type

Temperature OverrideOverride Hysteresis

68

Time ScheduleConfigurationTable Decisions

The CSM contains a table that allows you to enter up to eightdifferent sets of occupied and unoccupied times. The CSM uses thistable to determine when to operate the chiller plant. The figurebelow illustrates the OCCDEFCS Time Schedule ConfigurationTable.

Explanations of the individual decisions follow the figure. Eachdescription includes the purpose of the decision, its allowableentries, and the default value that it contains before it is configured.

Figure 12Time ScheduleConfiguration Table(OCCDEFCS)

OCCDEFCS: Configuration

DESCRIPTION

Time Schedule

Manual Override Hours

Manual Override Hours

Period 1: Day of WeekPeriod 1: Occupied from

Period 1: Occupied to

Period 2: Occupied fromPeriod 2: Day of Week

Period 2: Occupied toPeriod 3: Day of Week

UNITS NAME NOTES

0 OVRD

DOW1OCC1UNOCC1

Period 3: Occupied from

11111111

0:00

111111110:00

Period 3: Occupied toPeriod 4: Day of WeekPeriod 4: Occupied from

Period 4: Occupied toPeriod 5: Day of WeekPeriod 5: Occupied from

Period 5: Occupied to

Period 6: Day of WeekPeriod 6: Occupied fromPeriod 6: Occupied toPeriod 7: Day of WeekPeriod 7: Occupied fromPeriod 7: Occupied toPeriod 8: Day of WeekPeriod 8: Occupied fromPeriod 8: Occupied to

24:00

24:0011111111

11111111

11111111

11111111

11111111

11111111

0:0024:00

0:0024:00

0:00

24:00

0:0024:00

0:0024:00

DOW1OCC1UNOCC1DOW1OCC1UNOCC1DOW1OCC1UNOCC1DOW1OCC1

UNOCC1

DOW1OCC1

UNOCC1DOW1OCC1

UNOCC1DOW1OCC1UNOCC1

0:00

24:00

VALUE

hours

69

This decision is used to enter the day(s) that the period’s OccupiedFrom and Occupied To times are in effect. From left to right, thefirst seven positions of the decision’s data entry field representMonday through Sunday. The eighth position represents Holiday.Each position of the data entry field can be set to 1 or 0. A 1 speci-fies that the period is in effect on the day that corresponds to thatposition; a 0 specifies that it is not in effect on that day. A periodmay be specified to be in effect on more than one day-of-week.

Allowable Entries 0 = Period not in effect on corresponding day1 = Period in effect on corresponding day

Default Value 0Note: Period 1 defaults to always occupied.

This decision is used to enter the hour and minute, in military time,that this occupied period begins.

To enter a 24-hour occupied period, enter 00:00 in the OccupiedFrom decision and 24:00 in the Occupied To decision.

To enter a 24-hour unoccupied period, enter 00:00 in both theOccupied From decision and the Occupied To decision.

When typing input for this decision, type in a leading zero (ifneeded), and a colon (:) to separate hours and minutes.

Allowable Entries 00:00 to 24:00(hour:minute of day)

Default Value 00:00

Period 1 - 8 DOW(MTWTFSSH)

Occupied From

70

This decision is used to enter the hour and minute, in military time,that this occupied period ends.

To enter a 24-hour occupied period, enter 24:00 in the OccupiedFrom decision and 00:00 in the Occupied To decision.

To enter a 24-hour unoccupied period, enter 00:00 in both theOccupied From decision and the Occupied To decision.

When typing input for this decision, type in a leading zero (ifneeded), and a colon (:) to separate hours and minutes.

Allowable Entries 00:00 to 24:00(hour:minute of day)

Default Value 00:00Note: Period 1 defaults to 24:00.

The CSM has eighteen Holiday Configuration Tables namedHOLDY01S through HOLDY18S. In each table you can configurea day or series of days to be treated as a holiday. On holidays theCSM's occupancy software will use the holiday occupancy scheduleinstead of the day of the week schedule it would normally use.

If the CSM is accepting holiday broadcasts from another device onthe CCN, there is no need to configure its holiday tables. In thiscase, the CSM's occupancy schedules will accept holiday flagstransmitted by a CCN broadcaster.

An example of this table is shown in Figure 13 on the next page.Descriptions of the individual decisions follow the figure. Eachdescription includes the purpose of the decision, its allowableentries, and the default value that it contains before it is configured.

HolidayConfigurationTable Decisions

Occupied To

71

Figure 13Holiday ConfigurationTable

In this decision you specify the month in which the holiday willbegin.

Allowable Entries 1 to 12 (months of the year)

Default Value 1

In this decision you specify the day of the month on which theholiday will begin.

Allowable Entries 1 to 31 (days of the month)

Default Value 1

Start Month

Start Day

HOLDY01S: Configuration

DESCRIPTION

Start Month

VALUE

Start Month

Start Day

Duration

UNITS NAME NOTES

MONTH

DAY

1

10 DURATION

72

In this decision you specify how many consecutive days the holidaywill last.

Allowable Entries 0 to 99 (days)

Default 0

The Setpoint Configuration Table is shown in Figure 14 below.

Duration (days)

SetpointConfigurationTable Decisions

Figure 14Setpoint ConfigurationTable (SETPOINT)

SETPOINT: Configuration

DESCRIPTION

Chilled Water Setpoint


Sequence Select OA Setpoint

Temp Override SetpointBPV Delta P Setpoint

UNITS NAME NOTES45.0

SEQSPT

CHWSPT

BPVSPT

-40.0

-40.0

0.0

OVRSPT

VALUE

dF

dF

dFPSI

73

This point displays the chilled water temperature that the CSM istrying to maintain at the configured control sensor, usually the CHWSupply Temperature sensor in the common supply header of thechiller plant.

Allowable Entries 0 to 212°F (-17.8 to 100°C)

Default Value 45 (7.2)

Enter the OAT Setpoint to be used in Sequence Selection Types 1 and3 in this decision.

Allowable Entries -40 to 245οF (-40 to 118.3οC)

Default Value -40 (-40)

If the Temperature Override function is enabled, and the selectedtemperature rises above the value entered in this decision, the CSM isconsidered to be in the occupied state (Cooling Active will be Yes).The value in this decision is the value used by the Temperature Over-ride algorithm.

Allowable Entries -40 to 245οF (-40 to 118.3οC)

Default Value -40 (-40)

This decision applies only when the Bypass Valve Control Typedecision is set to 2 (differential pressure input).

Enter the differential pressure setpoint for the bypass valve controlroutine. For more information, refer to Bypass Valve Control in theOverview section of this manual.

Allowable Entries 0.0 to 999.9 psi (0 to 6894.3 kPa)



Sequence Select OASetpoint

Temp Override Setpoint

BPV Delta P Setpoint

74

This CSM table gives you the capability to:

• broadcast current time on the CCN.• configure the start of daylight saving time.• configure the end of daylight saving time.

The Broadcast configuration table is shown in Figure 15 below.

BroadcastConfigurationTable Decisions

Figure 15Broadcast ConfigurationTable (BRODEF)

BRODEF: Configuration

Description

Time Broadcast Enable


Value Units

Dsable

Name Notes

Daylight Saving

Start Month

Start Day of Week

Start Time

Start Advance

Stop Month

Stop Day of Week

Stop Time

Stop Back

4

3

2:00

60

10

2:00

60

DAYSAV

DLSTRMON

DLSTRDOW

DLSTRWK

DLSTRTIM

DLSTRADV

DLSTPMON

TIMEBCST

Start Week

Stop Week

DLSTPDOW

DLSTPWK

DLSTPTIM

DLSTPADV

7

min

7

3

min

75

Use this decision to indicate whether the CSM will broadcast thetime and date to other system elements on the CCN.

Allowable Entries Disable/Enable

Default Value Disable

Use this decision to enter the month when the CSM will adjust thetime for the start of daylight saving time.

Allowable Entries 1 to 12

Default Value 4

Use this decision to enter the day of the week when the CSM willadjust the time for the start of daylight saving time, where 1 =Monday.


Default Value 7

Use this decision to enter the week of the month when the CSMwill adjust the time for the start of daylight saving time.


Default Value 1

Use this decision to enter the time of day when the CSM will adjustthe time for the start of daylight saving time. Use a decimal orcolon to separate hours from minutes.

Allowable Entries 00:00 to 23:59

Default Value 02:00


Daylight SavingStart Month

Daylight SavingStart Day of Week

Daylight SavingStart Week

Daylight SavingStart Time

76

Use this decision to enter the number of minutes by which the CSMwill adjust the time for the start of daylight saving time. An entry of0 will disable this feature.


Default Value 60

Use this decision to enter the month when the CSM will adjust thetime for the end of daylight saving time.


Default Value 10

Use this decision to enter the day of the week when the CSM willadjust the time for the end of daylight saving time, where 1 = Mon-day.


Default Value 7

Use this decision to enter the week of the month when the CSM willadjust the time for the end of daylight saving time.


Default Value 5

Use this decision to enter the time of day when the CSM will adjustthe time for the end of daylight saving time. Use a decimal or colonto separate hours from minutes.

Allowable Entries 00:00 to 23:59

Default Value 02:00

Daylight SavingStart Advance

Daylight SavingStop Month

Daylight SavingStop Day of Week

Daylight SavingStop Week

Daylight SavingStop Time

77

Use this decision to enter the number of minutes by which the CSMwill adjust the time for the end of daylight saving time. An entry of0 will disable this feature.


Default Value 60

Daylight SavingStop Back

78

Service ConfigurationTable Decisions

79

The Chiller System Manager has five service configuration tables —SERVICE, SENSORS1, SENSORS2, BYPASS, and ALARMS.Descriptions of each table’s individual decisions appear later in thischapter.

The SERVICE Configuration Table gives you the capability toconfigure system operating parameters such as capacity control,setpoint resets, and ACR and RCR parameters. It is primarilyintended for use by Carrier Service personnel during initial systemsetup.

The SERVICE Configuration Table is shown on the next page.Descriptions of the individual decisions follow the figure. Eachdescription includes the purpose of the decision, allowable entries,and the default value.

ServiceConfigurationTable Decisions

ServiceConfigurationTable Decisions

80

Figure 16SERVICE Configuration

Table

SERVICE: Configuration

DESCRIPTION

Capacity Control

Capacity Control Type

VALUE


Proportional GainIntegral Gain

Control Sensor, 0=CHWST

Reset TypeSetpoint Reset Function

Start TemperatureStop Temnperature

UNITS NAME NOTES

0.0

50

CAPTYP

PGAIN

IGAIN

MINLCW

RSTTYP

RSTSTPDegrees Full Reset

1

0.0

0

30

2.0

30

1.0

CTLSEN

RSTSTR

RSTDEG

ACR FunctionSetpoint Delta T

Pulldown TimeLag Start Delay Time

Soft Start FunctionRamp Rate (%kW/Min)Chiller Inhibit Time

STARTDEL

ACRDELTAPULLDOWN

ACRRAMPRCINHIBIT

10

Dsa SOFTSTRT

Min Control Point Delta

070.060.05.0

^F

dFdF^F

^Fmin

min

min

%

10RCR Function

10

RCR Hysteresis

120

5

0 RCRCORRTRCRHYSTR

RCR Correction TermLag Stop Delay Time

Power Fail RestartPFR Delay Time

Threshold Time

Loadshed Function

Demand Limit DecreaseGroup Number

30

STOPDELY

MAXSHED

LDSGRPNLDSDLTA

Maximum Loadshed Time

00

PFRDELYTHRSHLD

min

minmin

min

%%

%

Pulldown Rate Limit

Clear Failstart Time

2.7

240

^F

min

PULLRLIM

CLRFAILT

ACR Demand Limit 95 % ACRLIMIT

Clear Failstart TimeClear Failstart TimeClear Failstart Time

81

This decision determines which type of capacity control the CSMwill use to maintain the system Current CHW Setpoint. For Type 1(normally recommended) the system supply water setpoint is sent tothe chillers, and the chiller controls maintain that control point. ForType 2 (best used where chillers are of relatively equal capacity andsystem load varies evenly), the configured Minimum Control PointDelta determines the chiller control points while the chiller demandlimits are continuously adjusted by a Proportional Integral calcula-tion to maintain the system CHW Setpoint (including Reset, if any).

Allowable Entries 1 = LCW Setpoint control2 = Demand Limit control (kW balancing)

Default Value 1

This decision is used to configure the proportional gain used in theCSM’s capacity control calculations. Higher gains cause the systemto react to changes faster, lower gains cause it to react slower. Theproportional and integral gains default to 0. For capacity controltype 1 (LCW setpoint control), this will cause the CSM to send itsCurrent CHW setpoint to all chillers. Generally, these gains shouldbe left at default values for capacity control type 1.

For capacity control type 2 (kW balancing), these gains should beset to 2.0 (P) and 0.2 (I) initially, then adjusted as required. TheProportional term is found by multiplying the difference betweenthe Current CHW Temperature and the Current CHW Setpoint bythe proportional gain (entered here). The integral term is found bymultiplying the same difference by the integral gain and adding theprevious integral term.

Allowable Entries 0.0 to 5.0

Default Value 0

Capacity ControlCapacity ControlType

Capacity ControlProportional Gain

82

This decision is used to configure the integral gain used in theintegral term calculation.

Refer to Capacity Control Proportional Gain description above.

Allowable Entries 0.0 to 5.0

Default Value 0

The value entered here is the lowest allowable LCW Setpoint theCSM will send to the chillers.

This value has two purposes depending on the capacity control type:For type 1 (LCW Setpoint), it acts as a safety limit - the PI calcula-tion (if used) cannot send a setpoint below this value to the chillers.For type 2 (kW balancing), this value is sent to all chillers to ensurethat they operate at the CSM's calculated demand limit.

Allowable Entries 0 to 5.0^F (0 to 2.8^C)


This decision allows you to designate either the Supply WaterTemperature sensor or the Return Water Temperature sensor as thesystem control sensor. Generally, it should be left at the default(CHWST).

Allowable Entries 0 =Chilled water supplytemperature sensor

1 =Chilled water returntemperature sensor

Default Value 0

Capacity ControlIntegral Gain

Capacity ControlMin Control PointDelta

Capacity ControlControl Sensor,0=CHWST

83

Use this decision to specify the chilled water reset method. ChilledWater Reset is an energy saving function that raises the currentCHW setpoint as conditions warrant.

Enter 1 in this decision to use an OAT sensor wired to Channel 5 ofthe CSM base module or optional module. OAT value can also bebroadcast from the CCN.

Enter 2 in this decision to use the Reset Temperature Sensor wiredto Channel 6 of the CSM optional module.

Enter 3 in this decision to use a 4 to 20 mA input signal from theExternal Reset input wired to Channel 6 of the CSM base module.

Note: For Reset Type 3, 4 mA equals 0° reset and 20 mA equalsconfigured Degrees Full Reset value.

Allowable Entries 0 = No reset1 = OAT sensor2 = Optional Reset Temperature sensor3 = External 4 to 20 mA reset signal

Default Value 0

The value entered here is the temperature at which chilled waterreset begins (degrees reset = 0).

The value of the reset temperature must go above this temperaturebefore reset can start.

Note: This decision does not apply to Reset Type 3 describedabove.

Allowable Entries -40 to 212°F (-40 to 100°C)


Setpoint ResetFunctionReset Type

Setpoint ResetStart Temperature

84

The value entered here is the temperature at which chilled waterreset has the maximum effect (degrees reset = degrees full reset).

Note: This decision does not apply to Reset Type 3 describedabove.

Allowable Entries -40 to 212°F (-40 to 100°C)


The value entered here is the maximum amount that chilled waterreset can add to the Current CHW setpoint, regardless of the tem-perature measured by the reset sensor.



The value entered in this decision is used by the ACR algorithm aspart of the temperature criteria to determine if a chiller should bestarted. One ACR condition is met if the CHW temperature exceedsthe current CHW setpoint by this amount. For more information,refer to the description of the Additional Cooling Required algo-rithm in the Overview chapter of this manual.

Allowable Entries 0.5 to 18.0^F (0.3 to 10^C)


This decision specifies the minimum time delay between the start ofthe lead chiller and the start of the 1st lag chiller.

This delay allows the lead chiller time to cool the building’s chilledwater loop. If all other ACR criteria are met at the end of thePulldown Time, the first lag chiller will be started.

Setpoint ResetStop Temperature

Setpoint ResetDegrees Full Reset

ACR FunctionSetpoint Delta T

ACR FunctionPulldown Time

85

The value entered here should be slightly greater than the amount oftime it takes for the chilled water to make one complete circuitthrough the building.

Pulldown Time is bypassed when the CSM is in the Power FailRestart mode.


Default Value 30

This decision specifies the minimum time delay allowed betweensuccessive starts of lag chillers. It is used by the ACR algorithm todetermine when a lag chiller can be started. For more information,refer to the description of the Additional Cooling Required algo-rithm in the Overview chapter of this manual.


Default Value 10

This decision enables and disables soft loading. When Soft Start isin effect, the CSM ramps smoothly to a new required system capac-ity when a new chiller is started. For more information, refer toRamp Loading in the Overview of this manual.

Caution: Do not use soft start for systems in which the chillercapacities are greatly unequal. Inefficient operationand/or machine damage may result.

Allowable Entries Disable/Enable

Default Value Disable

ACR FunctionLag Start Delay Time

ACR FunctionSoft Start Function

86

This is the rate at which the chillers will be ramped after a start-up isconfirmed if soft start is enabled.

Note: Although the units specified for this decision are %kW perminute, the actual ramping is done every 10 seconds atone-sixth of the rate.

This decision does not supersede the individual chiller’s RampLoading Rate adjustment. The Ramp Loading Rate at the chillershould be set to correspond with the value entered here.

Allowable Entries 10 to 100 %kW/Minute

Default Value 50

The value entered in this decision is the amount of time before thescheduled unoccupied time during which no additional chillers willbe started.


Default Value 30

This is the rate of change criteria used by the ACR algorithm.

For most applications, this decision should be left at the defaultvalue. If flow problems or other site-specific conditions requiremore aggressive starting, you can raise this value.

Allowable Entries 0.5 to 5.0^F (.3 to 2.8^C)

Default Value 2.7.5^F (1.5^C)

ACR FunctionRamp Rate (%kW/Min)

ACR FunctionChiller Inhibit Time

ACR FunctionPulldown Rate Limit

87

If a chiller is commanded to start but it does not start or fault in theconfigured Failstart Time, its status is FAILSTART. TheCHILLERVISOR System Manager will not try to start it again untilthis status is cleared.

You can clear FAILSTART manually by forcing Clear FailstartChillers to Yes, or automatically after the time configured in thisdecision. Entering 0 disables automatic FAILSTART clearing.


Default Value 240

This value is one criterion used by the ACR algorithm to determineif an additional chiller should be started. The Current Demand Limitof the CSM must exceed this value for the criterion to be true. IfCapacity Control Type 2 (KW Balancing) is being used and it isdesired to start lag chillers more agressively, then this value shouldbe decreased. For more information, refer to the description of theAdditional Cooling Required algorithm in the Overview chapter ofthis manual.

Allowable Entries 50 to 99%

Default Value 95

RCR Hysteresis is used by the RCR algorithm to calculate the RCRuncorrected setpoint. For more information, refer to the descriptionof the Reduced Cooling Required algorithm in the Overview chapterof this manual.


Default Value 10

The value entered in this decision is used by the RCR algorithm tocalculate the corrected RCR setpoint from the uncorrected setpoint.For more information, refer to the description of the ReducedCooling Required algorithm in the Overview chapter of this manual.


Default Value 0

ACR FunctionClear Failstart Time

RCR FunctionRCR Hysteresis

ACR FunctionACR Demand Limit

RCR FunctionRCR Correction Term

88

This decision specifies the minimum time delay required for theRCR conditions to be satisfied before the RCR algorithm can stop alag chiller. For more information, refer to the description of theReduced Cooling Required algorithm in the Overview chapter ofthis manual.


Default Value 10

The value entered here is the delay time before the lead chiller isstarted, on recovery from a power outage.

This delay allows time for other electrical building loads to stabilizebefore starting a chiller.


Default Value 5

After the PFR Delay Time expires, if power was lost for less thanthe amount of time configured in this decision, the CSM will startthe available chillers in the current sequence at 1-minute intervalsuntil the capacity on line before the power failure is restored.

After the PFR Delay Time expires, if power was lost for more thanthe amount of time configured in this decision, the CSM will startthe available chillers in the current sequence using the Lag StartDelay Time between Start commands. ACR logic determines thenumber of chillers to be started.

Note: For power failures lasting longer than this value, thisprocess is similar to normal startup, except that the CSMbypasses pulldown time to allow the chiller plant toachieve capacity more quickly.


Default Value 30

Power Fail RestartPFR Delay Time

RCR FunctionLag Stop Delay Time

Power Fail RestartThreshold Time

89

This decision is used to coordinate CSM operations with a CCNLoadshed Option. For more information on Loadshed, refer to theLoadshed Option Overview and Configuration Manual.

A CCN Loadshed Option can be used to affect chiller demandlimits. If you wish the chillers to be subject to Loadshed Optiondemand limiting, enter the Loadshed Supervisory Part Number inthis decision.

If a Redline command is received from Loadshed, all chiller demandlimits are clamped at their current values. When a Loadshed com-mand is received the demand limits are reduced by the configureddemand limit decrease.

Allowable Entries 0 = No Loadshed Option1 through 16 =Loadshed Supervisory

Part Numbers

Default Value 0

This is the amount that the CSM will subtract from the actual run-ning %kW for each chiller when a Loadshed command is received.

Allowable Entries 0 to 99 %

Default Value 0

The value entered here limits the time that the chiller can remaindemand-limited by the Loadshed Option.

If the CSM loses communication with the Loadshed Option, thisdecision will allow the chiller plant to return to full capacity. Thevalue entered here should be slightly greater than the Maximum OffTime configured at the Loadshed Option.


Default Value 120

LoadshedGroup Number

LoadshedDemand LimitDecrease

LoadshedMaximum LoadshedTime

90

SENSORS1ConfigurationTable Decisions

Use the SENSORS1 Configuration Table to configure the tempera-ture sensors hardwired to the CSM base module. The status of thesepoints is displayed in the POINTS1 Table.

A SENSORS1 Configuration Table is shown below. Descriptions ofthe decisions follow the figure. Each description includes the pur-pose of the decision, allowable entries, and the default value. Be-cause the decisions for the temperature sensors are the same, theyare shown only once.

Figure 17SENSORS1 Service

Configuration Table

SENSORS1

DESCRIPTION


Sensor Type

Sensor Type

Sensor Trim

Sensor TrimSensor Type

UNITS NAME NOTES

0

SENSTYPE

SENSTRIM

SENSTYPE

INPUTHI

Sensor Type

0.0

50

SENSTRIM

INPUTLO

Sensor Trim

Input Low Value

Base Module Channel 5

Sensor TypeSensor Trim

External Demand Limit

Input Low ValueEXTDMHI

0.0

100EXTDMLO

Input High Value

Input High Value



Load Delta Pressure

OAT/OVRD Sensor Select

1

0.0

0

0.0

00.0

0.0

0

SENSTRIMSENSTYPE

SENSTYPESENSTRIMBASEMCH5

VALUE

^F

^F

^F

^F

PSI

%

PSI

%

Remote Contact/Plant Sw 0 REMCON

91

This decision determines the type of sensor to be used.

Allowable Entries 0 = None1 = 5K Thermistor sensor2 = 10K Thermistor sensor (Type III - YSI)

Default Value 1 (for supply water temp-erature only)

0 (for all others)

This decision determines the offset to be added to the actual tempera-ture value before its storage/display. This can be useful when a sensorhas a constant offset, to compensate for the error.

Allowable Entries -18.0 to 18.0^F (-10.0 to 10.0^C)


This decision determines the low pressure range. It is used only forBypass Valve Control Type 2.

Allowable Entries 0.0 to 999.9 psi (0-6894.3 kPa)


This decision determines the high pressure range and must be config-ured for the sensor input to function. It is used only for Bypass ValveControl Type 2.



Sensor Type (Supply/Return Water Temp,Load Return Temp)

Sensor Trim (Supply/Return Water Temp,Load Return Temp)

Input High Value (LoadDelta Pressure)

Input Low Value (LoadDelta Pressure)

92

This decision determines the type of sensor to be used. The functionof the channel is user configurable (OAT or override sensor).

Allowable Entries 0 = Sensor not used1 = 5K Thermistor sensor2 = 10K Thermistor sensor (Type III - YSI)

Default Value 0




This decision indicates whether the sensor wired to Channel 5 of theCSM base module is an OAT sensor or a Temperature Overridesensor.

Allowable Entries 0 = OAT1 = OVRD

Default Value 0 (OAT)

This decision determines the low range (4 mA) for the optional exter-nal demand limit 4-20 mA sensor wired to CSM base module Channel7.


Default Value 50

Sensor Type (BaseModule Channel 5)

Sensor Trim (BaseModule Channel 5)

OAT/OVRD Select

Input Low Value (Exter-nal Demand Limit)

93

Input High Value (Ex-ternal Demand Limit)

This decision determines the high range (20 mA) for the optionalexternal demand limit 4-20 mA sensor wired to CSM base moduleChannel 7.


Default Value 100

This decision determines whether CSM base module Channel 8 acts asa remote contact input (sets Cooling Active), or as a chiller plantswitch (sets Program Status).

For Remote Contact operation, the plant is started and stopped. ForPlant Switch operation, the CSM programs are enabled and disabled.

Allowable Entries 0 = Remote Contact1 = Plant Switch

Default Value 0

Remote Contact/Plant Switch

94

SENSORS2ConfigurationTable Decisions

Figure 18SENSORS2 Service

Configuration Table

Use the SENSORS2 Configuration Table to configure the tempera-ture sensors hardwired to the CSM optional module. The status ofthese points is displayed in the POINTS2 Table.

A SENSORS2 Configuration Table is shown below. Descriptions ofthe decisions follow the figure. Each description includes the pur-pose of the decision, allowable entries, and the default value. Be-cause the decisions for the temperature sensors are the same, theyare shown only once.

SENSORS2

DESCRIPTION

Backup Supply Water Temp

Sensor Type

Sensor Type

Sensor Trim

Sensor TrimSensor Type

UNITS NAME NOTES

0

SENSTYPE

SENSTRIM

SENSTYPE

SENSTRIMSensor Type

0

0.0

0

0.0

0.0

0.0

0

SENSTRIM

SENSTYPE

INPUTLO

Sensor Trim

Input Low Value

Option Module Channel 5

Sensor TypeSensor Trim

Optional Reset Temp

Sensor Type

SENSTRIMSENSTYPE

SENSTYPE

0.0

0.0 SENSTRIMSensor Trim

Input High Value 0.0 INPUTHI

Backup Return Water Temp

Backup Load Return Temp

Backup Load Delta Press

OAT/OVRD Sensor Select 0

0

OPTNMCH5

VALUE

^F

^F

^F

^F

^F

PSIPSI

95

Sensor Type (BackupSupply/Return WaterTemp, Backup LoadReturn Temp, OptionalReset Temp)

This decision determines the type of sensor to be used.

Allowable Entries 0 = None1 = 5K Thermistor sensor2 = 10K Thermistor sensor (Type III - YSI)

Default Value 0




This decision determines the low pressure range. It is used only forBypass Valve Control Type 2.



This decision determines the high pressure range and must be config-ured for the sensor input to function. It is used only for Bypass ValveControl Type 2.



Sensor Trim (BackupSupply/Return WaterTemp, Backup LoadReturn Temp, OptionalReset Temp)

Input Low Value(Backup Load DeltaPressure)

Input High Value(Backup Load DeltaPressure)

96

Sensor Type (OptionModule Channel 5)

Sensor Trim (OptionModule Channel 5)

This decision determines the type of sensor to be used. The function ofthe channel is user configurable (OAT or override sensor).

Allowable Entries 0 = Sensor not used1 = 5K Thermistor sensor2 = 10K Thermistor sensor (Type III - YSI)

Default Value 0




This decision indicates whether the sensor wired to Channel 5 of theCSM option module is an OAT sensor or a Temperature Overridesensor.

Allowable Entries 0 = OAT1 = OVRD

Default Value 0 (OAT)

Use the Bypass Valve Service Configuration Table (BYPASS) toconfigure the bypass valve type and other control parameters. Bypassvalve status is displayed in the BYPASS Table.

The Bypass Valve Service Configuration Table is shown on the nextpage. Descriptions of the decisions follow the figure. Each descriptionincludes the purpose of the decision, allowable entries, and the defaultvalue.

Bypass ValveServiceConfigurationTable Decisions

OAT/OVRD Select(Option ModuleChannel 5)

97

Figure 19Bypass Valve Service

Configuration Table

(BYPASS)

Use this decision to select the type of input to use as feedback forcontrolling the bypass valve(s).

Note: The other decisions in this table are applicable only if thisdecision is > 0.

Enter 1 to select differential temperature control. It uses theCHWST and CHWRT sensors. CHWRT is not installed in everysystem.

Enter 2 to select differential pressure control. You must also wire aCHW pressure differential sensor to Channel 4.

You must also wire a load return temperature sensor to channel 3 ifall chillers are approximately the same capacity and to calculate %flow bypassed (BYPASS Points Display Table). Otherwise, it may

Bypass Valve ControlControl Type

BYPASS

DESCRIPTIONBypass Valve Control

Control Type

Control Type

Number of Valves

Control Loop Gain

System Design Delta T

UNITS NAME NOTES

0BPVALVS

BPVTYPE

BPVGAIN

2

10.0

3

DTDESIN

VALUE

^F

Valve 1Output TypeNormal Position

Valve 2Output TypeNormal Position

1

1

Open

Open

BPV1TYPE

BPV2TYPE

BPV1NMLBPV2NML

Opening Time 60 sec BPVOPEN

98

be installed as an optional monitoring feature.For more information, refer to Bypass Valve Control in the Over-view section of this manual.

Allowable Entries 0 = Disabled1 = Control based on delta temperature2 = Control based on delta pressure

Default Value 0

This decision specifies whether the chilled water system has one ortwo bypass valves. If there are 2, it assumes valve 1 is sized forone-third of the bypass flow, and valve 2 is sized for two-thirds.

Allowable Entries 1 or 2

Default Value 2

This decision applies only when the Control Type decision is set to1 (differential temperature input).

Enter the chiller plant design entering to leaving water temperaturedifference (the chilled water system design temperature rise).

This value is used to calculate the setpoint for the Bypass Valve PIloop. For more information, refer to Bypass Valve Control in theOverview section of this manual.



Enter the overall gain for the bypass valve control PI loop. Increas-ing this value will cause the PI loop to calculate faster controlresponses to changes in the input signal (differential temperature orpressure). Decreasing this value will cause the PI loop to calculateslower responses to changes in the input signal.

Bypass Valve ControlNumber of Valves

Bypass Valve ControlSystem Design Delta T

Bypass Valve ControlControl Loop Gain

99


Default Value 3

Enter the bypass valve opening time, in seconds, to match the field-selected actuator. A new chiller is not allowed to start until thebypass valves have been commanded open for this amount of time,so that they are fully open on start up.

Allowable Entries 0 to 300 seconds

Default Value 60

Enter the type of output for this bypass valve.

Allowable Entries 1 = 4-20 mA2 = 2-10 Vdc3 = 0-10 Vdc

Note: You must adjust dip switch settings on the CSM moduleaccording to the valve's output type (refer to the CSM IIIinstallation instructions).

Default Value 1

Enter this bypass valve's normal position.

Allowable Entries Open/Close

Default Value Open

The CSM's ALARMS Configuration Table gives you the capabilityto specify re-alarm time, alarm routing, and the allowable limits forCSM inputs. This table consists of five sections:

• General alarm configuration• Setpoint Hysteresis• Supply Water Temperature• Return Water Temperature• Load Delta Pressure

Each temperature limit alarm consists of four decisions:

• Low Limit• High Limit• Alarm or Alert• Alarm Level

Valve 1/Valve 2Output Type

Valve 1/Valve 2Normal Position

ALARMS ServiceConfigurationTable Decisions

Opening Time

100

The ALARMS Configuration Table is shown below. Descriptions ofthe individual decisions follow the figure. Each description includesthe purpose of the decision, allowable entries, and the default value.

Use this decision to specify the amount of time that will be allowedto elapse between re-alarms. A re-alarm occurs when the conditionthat caused the initial alarm continues to persist for the number ofminutes specified in this decision. Re-alarming will continue at thespecified interval until the condition causing the alarm is corrected.

Allowable Entries 0 = Re-alarming disabled1-1440 minutes

Default Value Value 0

ALARMS

DESCRIPTION

Alarm Control

Realar m Time

Realarm Time

Low Limit


UNITS NAME NOTES

1

REALARM

ALRMHI

ALRMOR245.0

0.0

ALRMLO

ALRMHI

Alarm Level

Low Limit

Alarm or Alert

Low LimitLoad Delta Pressure

Alarm Level

6Alarm Level

High Limit

CHW Setpoint Hysteresis

High Limit


High Limit

011010000

245.0

61

1

999.9

ALRMORALRMLV

ALRMOR

LOADLO

LOADHI

Alarm or Alert

Alarm or Alert

-40.0

6

-40.0

SPTHYST

ALRMLO

ALRMLV

ALRMLV

Alarm Routing

VALUE

5

min

^F

dFdF

dFdF

PSI

PSI

ALRMCNT

Figure 20ALARMS

Configuration Table

Alarm ControlRe-alarm Time

101

This decision determines which CCN system elements will receiveand process alarms sent by the CSM. Input for the decision consists ofeight digits, each of which can be set to either 0 or 1. Setting a digit to1 specifies that alarms will be sent to the system element that corre-sponds to that digit. Setting all digits to 0 disables alarm processing.Digits in this decision correspond to CCN system elements in thefollowing manner:

Alarm Printer Interface ModuleAutodial GatewayLocal CCN User Interface

1 1 0 1 0 0 0 0unused

Note: If your CCN does not contain ComfortWORKS or a Build-ing Supervisor, Autodial Gateway, or APIM to serve as analarm acknowledger, you should set all digits in this decisionto 0 in order to prevent unnecessary activity on the CCNCommunication Bus.

Allowable Entries 00000000 to 111111110 = Disabled, 1 = Enabled

Default Value 1 1 0 1 0 0 0 0

If the value of the CSM control sensor (usually CHWST) exceeds thecurrent CHW Setpoint by this amount when Cooling Active is Trueand Pulldown Time is over, a CCN alert will be generated.

Allowable Entries 1-18^F (0.6 to 10^C)


Use this decision to indicate the lowest desirable temperature for thesensor. If the sensor temperature reading falls below this limit, theCSM will generate an alarm or alert to warn you that the sensor valueis too low. This will not affect the CSM functions. For more informa-tion, refer to the description of the Automatic Program Disabling andAlarm Conditions function in the Overview chapter of this manual.

Allowable Entries -40.0 to 2450F (-40 to 118.3 0C)

Default Value -40.0 (-40.0)

Alarm ControlAlarm Routing

CHW SetpointHysteresis

102

Use this decision to indicate the lowest desirable temperature for thesensor. If the sensor temperature reading falls below this limit, theCSM will generate an alarm or alert to warn you that the sensor value istoo low. This will not affect the CSM functions. For more information,refer to the description of the Automatic Program Disabling and AlarmConditions function in the Overview chapter of this manual.


Default Value -40.0 (-40.0)

Use this decision to indicate the highest desirable temperature for thesensor. If the sensor temperature reading rises above this limit, theCSM will generate an alarm or alert to warn you that the sensor value istoo high. This will not affect the CSM functions. For more information,refer to the description of the Automatic Program Disabling and AlarmConditions function in the Overview chapter of this manual.


Default Value 245 (118.3)

Use this decision to indicate the lowest desirable pressure for the sen-sor. If the sensor temperature reading falls below this limit, the CSMwill generate an alarm or alert to warn you that the sensor value is toolow. This will not affect the CSM functions. For more information,refer to the description of the Automatic Program Disabling and AlarmConditions function in the Overview chapter of this manual.

Allowable Entries 0 to 999.9 psi ( 0 to 6894.3 kPa)


Low Limit (Supply/Return WaterTemperature)

High Limit (Supply/Return WaterTemperature)

Low Limit (Load DeltaPressure)

103

Use this decision to indicate the highest desirable pressure for thesensor. If the sensor temperature reading rises above this limit, theCSM will generate an alarm or alert to warn you that the sensor valueis too high. This will not affect the CSM functions. For more informa-tion, refer to the description of the Automatic Program Disabling andAlarm Conditions function in the Overview chapter of this manual.

Allowable Entries 0 to 999.9 psi ( 0 to 6894.3 kPa)Default Value 999.9 (6894.3)

This decision defines whether a sensor temperature reading below orabove the low or high limits will generate an alarm or alert.

Allowable Entries 0 = Alert1 = Alarm

Default Value 1

This decision defines CSM alarm or alert priority level. The levelsrange from 0 to 6. A priority of 0 is the highest, and a priority of 6 isthe lowest.

Allowable Entries 0 = Fire/life safety1 = Critical2 = Service3 = Reserved4 = Maintenance5 = Reserved6 = Control

Default Value 6

High Limit (Load DeltaPressure)

Alarm Level(Supply/Return WaterTemperature, LoadDelta Pressure)

Alarm or Alert(Supply/Return WaterTemperature, LoadDelta Pressure)

104

Maintenance TableDecisions

105

MaintenanceTable Decisions

The CSM contains the following maintenance tables:

• BASEMAIN System Maintenance Table• CHILLER 1–8 Chiller Maintenance Tables• OCCDEFME Time Schedule Maintenance Table• WSMDEFME WSM Maintenance Table

Maintenance tables display current information about the operationof the CSM and its functions. They also serve as a useful tool forunderstanding and troubleshooting chiller system operations.

The BASEMAIN System Maintenance Table is shown on the nextpage. Descriptions of the individual decisions follow the figure.Each description includes the purpose of the decision and its validdisplay units.

BASEMAINMaintenanceTable Decisions

106

Figure 20BASEMAIN MaintenanceTable

BASEMAIN

DESCRIPTION

System Status

CSM Status

CSM Status

Pulldown Time Remaining

PFR Delay Timer

Fault Conditions

Any Backup Sensr ActiveAny Chiller Faulted

Temp Averaging Active

Cooling Active Function

UNITS NAME DEFAULT

Cooling ActiveModeOverride Temperature

Current Sequence

Step 1

Step 2

Capacity ControlCurrent Control PointCurrent Demand LimitMaximum Demand Limit

Setpoint Reset Function

Current CHW SetpointCurrent CHW TemperatureAverage Chiller Load

Reset Value

Optional Reset Temp

Outside Air Temperature

ACR FunctionACR Conditions True

Time To Start ChillerNext Chiller To StartStart Fault Timer

Pulldown RateCSM Capacity Exceeded

Inhibit Chiller Startup

RCR FunctionRCR Conditions TrueRCR Corrected Setpoint

Time To Stop ChillerNext Chiller To Stop

Loadshed FunctionRedlineLoadshedLoadshed Timer

VALUE

CSMSTATPULLTIME

PFRTIME

CHILFLT

BACKUPATMPAVGA

COOLINGCOOLMODOVRDTMP

CSEQSTP1CSEQSTP2

LCW_STPT

DEM_LIMMAXDEMCTLSETCTLTMPAVGLOAD

RSTVAL

OATOPTRST

ACRFLAG

STRTTIMNXTSTRTSTRTFLTPULLRATE

FULLCAPINHIBIT

RCRFLAGRCRCSETSTOPTIMNXTSTOP

REDLINELOADSHED

LOADTIME

dF

min

min

dF%%dFdF%

^F

dFdF

min

min^F

%min

min

000

00

NoNoNo

No

000.0

Standby Chiller Number CSTANDBY0

000.0

000.0000.0

000000

000

00.0

000.0000.0

No

No

No

No

NoNo

000

000.0

000

000

000

107

This point displays the status of the entire CSM system when pro-gram status is enabled. When program status is disabled, this pointdisplays NO COOL.

Note: After recovery from a power outage, the system willdisplay No Cool for the configured PFR Delay Time, thenit will display PFR.

Display Units NO COOLLEADSTRTPULLDOWNLAGSTARTSTDYSTATRAMPINGLAGSTOPRESEQPFRSHUTDOWN

This point displays the number of minutes before pulldown timeelapses. During the pulldown period the lead chillers “pull down”the chilled water supply temperature without the Additional CoolingRequired (ACR) routine trying to start additional chillers. At allother times it displays 0.

Display Units Minutes

This point displays the amount of time before the lead chiller isstarted, on recovery from a power outage. At all other times itdisplays 0.


This point displays whether any configured chiller is currently inFaulted status.


System StatusCSM Status

System StatusPulldown TimeRemaining

Fault ConditionsAny Chiller Faulted

System StatusPFR Delay Timer

108

This point displays whether the Backup Supply/Return Tempera-ture, Load Return Temperature, Load Pressure, Override or OATsensor is currently active. All of these sensors are wired to theoptional CSM module.


This point displays whether temperature averaging is in effect. If aconfigured Chilled Water Supply or Chilled Water Return sensorfails without a backup when Temp Averaging is Active, the CSMreads the entering or leaving water temperatures from the chillers.If valid readings are obtained from more than 50% of the runningchillers, these temperatures are weighted by the configured chillercapacities to produce an average temperature value.


This point displays whether CSM has assumed active control of thechiller plant. The same value is also displayed in the BASESYSPoints Display Table.


This point displays the input that is currently determining whetherCooling Active is true or false.

Display Units DISABLE = DisabledTIMESCHED = Time ScheduleREMCON = Closed remote contactsFORCE = Force by an operator on the

Points screenWSM = WSM module on the CCNTEMPOVRD = Temperature Override

This point displays the value of the Override Temperature fromChannel 5 on the base module or from Channel 5 on the optionmodule. The point can be forced.


Fault ConditionsAny Backup SensorActive

Fault ConditionsTemp AveragingActive

Cooling Active FunctionCooling Active

Cooling Active FunctionMode

Cooling Active FunctionOverride Temperature

109

This point displays step 1 of the currently active sequence.

Display Units Chiller numbers 1-8

This point displays step 2 of the currently active sequence.

Display Units Chiller numbers 1-8

This decision specifies the standby chiller for the current sequence,if one is configured.

Display Units 0 = No chiller present1 through 8

This point displays the Leaving Chilled Water setpoint that the CSMis sending to all chillers.

For more information, refer to Capacity Control in the Overviewsection of this manual.

Display Units Degrees

This point displays the current Demand Limit that the CSM issending to all chillers.

Display Units %

This point displays the maximum active demand limit the CSM cansend to any chiller. The active demand limit is the maximum percentunit capacity at which a chiller is allowed to run. The CSM can resetthis value downward if there is an External Demand Limit sensorconfigured, or if a loadshed option is present on the CCN. Thispoint can be forced.

For more information, refer to Capacity Control in the Overviewsection of this manual.

Display Units %

Current SequenceStep 1

Current SequenceStep 2

Current SequenceStandby ChillerNumber

Capacity ControlCurrent Control Point

Capacity ControlCurrent Demand Limit

Capacity ControlMaximum DemandLimit

110

This point displays the system chilled water temperature that theCSM is trying to maintain.


This point displays the temperature of the water at the Controlsensor (CHWST or CHWRT). The CSM is attempting to maintainthe current CHW Setpoint temperature at this sensor.


This point represents the per cent capacity at which the plant iscurrently running. It is calculated based on % Mtr Amps from allrunning chillers, weighted by their configured capacities.

Display Units %

This point displays the calculated Setpoint Reset value.


When Setpoint Reset is based on OAT, this point displays theoutside air temperature value.

Display Units Degrees F

When Setpoint Reset is based on the Optional Reset Sensor tem-perature value, this point displays that value.

Display Units Degrees F

Capacity ControlCurrent CHW Setpoint

Capacity ControlCurrent CHWTemperature

Setpoint Reset FunctionReset Value

Setpoint Reset FunctionOutside AirTemperature

Setpoint Reset FunctionOptional Reset Temp

Capacity ControlAverage Chiller Load

111

The ACR algorithm determines the need for an additional chiller.The status of ACR is displayed here.


This decision displays the time remaining in the Service Configura-tion Table’s Lag Start Delay Time decision. When all of the ACRconditions are true, this value decrements once each minute. If anyACR condition becomes false, this value resets itself back to thevalue specified in the Lag Start Delay Time decision.

Refer to Additional Cooling Required (ACR) in the Overviewsection of this manual for a complete description of the ACR condi-tions and routine.


This point displays the number of the next chiller in the configuredsequence that is available to start.


This point displays the remaining time that may elapse after ACRcommands a lag chiller to start until the chiller attains Runningstatus.


This point displays the temperature pulldown rate, the rate at whichthe system CHW temperature is dropping, which is calculated every10 seconds, linearized on the last 10 ACR control temperaturesensor samples.

Display Units ^F or ^C/min

ACR FunctionACR Conditions True

ACR FunctionTime To Start Chiller

ACR FunctionNext Chiller To Start

ACR FunctionStart Fault Timer

ACR FunctionPulldown Rate

112

When this decision displays Yes, more chillers are needed to satisfythe cooling load, but none are currently available.

When this decision displays No, the available chillers are satisfyingthe cooling load.


This decision displays whether the CSM is in the configured ChillerInhibit Time period just before it is due to become unoccupied.During this time period, the CSM will not start any chillers.

While Inhibit Chiller Startup is set to Yes:

• the Start Lead Chiller routine will not start any chillers.

• the ACR routine does not test to determine whether to start achiller.

Note: The Power Failure Restart routine is allowed to startchillers.


The RCR algorithm determines when a chiller can be stopped. Thestatus of RCR is displayed here.


This point displays the maximum allowable cooling load as apercent of on-line capacity before stopping a chiller. If the AverageChiller Load is above this CSM-calculated value, there is too muchcooling load to be handled by one less chiller, and the ReducedCooling Required routine (RCR) will not stop a chiller.

For a complete description of the Reduced Cooling Required rou-tine, refer to Reduced Cooling Required (RCR) in the Overviewsection of this manual.

Display Units 0 to 100%

ACR FunctionCSM CapacityExceeded

ACR FunctionInhibit Chiller Startup

RCR FunctionRCR Conditions True

RCR FunctionRCR Corrected Setpoint

113

This point displays the time remaining before the Reduced CoolingRequired routine (RCR) can stop a chiller. When all of the RCRconditions are true, this value decrements once each minute. If anyRCR condition becomes false, this value resets to the value of theLag Stop Delay Time decision.

Refer to Reduced Cooling Required (RCR) in the Overview sectionof this manual for a complete description of the RCR conditions androutine.


This point displays the number of the next lag chiller that is sched-uled to stop. When all of the RCR conditions are true, CSM stopsthe next chiller in the current sequence.


This decision displays whether the CSM has received a Redlinecommand from its associated Loadshed Option supervisory part (inthe Loadshed Option module).

Redline is set to Yes when the CSM receives a Redline alert fromthe Loadshed Option.

While Redline is set to Yes:

• the Loadshed Equipment Part (in the CSM) stops any lag chill-ers that have been commanded to start but have not yet started.

• the ACR routine does not test to determine whether to start a lagchiller.

• the Capacity Control routine cannot increase the active demandlimit of any chiller.

Redline is set to No when either of the following conditions occurs:

• The Maximum Loadshed Time expires so the Loadshed Timerdecrements to 0.

RCR FunctionTime To Stop Chiller

RCR FunctionNext Chiller To Stop

Loadshed FunctionRedline

114

• The Loadshed Option supervisory part sends a Cancel Redlinemessage.


This decision is set to Yes when the CSM has received a Loadshedcommand from its associated Loadshed Option supervisory part (inthe Loadshed Option module).

While Loadshed is set to Yes:

• the Loadshed Equipment Part decreases the active demand limitof all running chillers by the configured loadshed demand deltavalue (when Ramping = No).

• the Loadshed Equipment Part (in the CSM) stops any chillersthat have been commanded to start but have not yet started.

• the ACR routine does not test to determine whether to start a lagchiller.

• the Capacity Control routine cannot increase the active demandlimit of any chiller.

This decision is set to No when either of the following conditionsoccurs:

• the Maximum Loadshed Time expires so the Loadshed Timerdecrements to 0.

• the Loadshed Option supervisory part sends a Cancel Loadshedcommand.


This decision displays the number of minutes that the CSM willremain in Loadshed or Redline alert before it will release itself.When Redline or Loadshed demand limiting starts, this timer is setto the Maximum Loadshed Time. It then decrements by one eachminute.

Loadshed FunctionLoadshed

Loadshed FunctionLoadshed Timer

115

The timer is cleared when a cancel Redline or Loadshed message isreceived (Redline or Loadshed = No). If it decrements to 0 before itis cleared, the CSM terminates Redline or Loadshed on its own. Formore information on Loadshed, refer to Loadshed under NetworkFunctions in the Overview section of this manual.

Display Units 0 to 480 minutes

The CSM contains up to eight Chiller Maintenance Tables, namedCHILLER1 to CHILLER8. Each table displays information aboutthe operation of one chiller. The data displayed in these tables isupdated every 10 seconds.

An example of this table is shown in Figure 21 below. Descriptionsof the individual decisions follow the figure. Each descriptionincludes the purpose of the decision, and its valid display values.

ChillerMaintenanceTable Decisions

Figure 21Chiller MaintenanceTable

CHILLER1

DESCRIPTION

Chiller 1

Commanded State

Commanded State

Status

Current Capacity

Current Control Point

Current Demand Limit


CHILLST

CHIL_S_S

UNITCAP%

LCW_STPT

DEM_LIM

VALUE STATUS

Stop

0

0

0

UNAVAIL

Service Runtime

Auto PFR Configured

SERVTIM

APFCONFNo

dF

%

0 hours

Reset Failstart Timer minutes0 RESETTIM

116

This point displays the last start or stop command that the CSM sentto this chiller. If program status is disabled, this point resets to stopto allow the operator to see it transition to start when the program isre-enabled. Even though Stop is displayed, no actual command issent. The chillers are left in the last commanded state when theCSM is disabled.

Display Units Stop = CSM has commanded chiller to stop

Start = CSM has commanded the chiller to run

This decision displays the operating status that the CSM is currentlyreceiving from this chiller’s PIC. It displays the last status that theCSM received from the PIC.

Chiller Status is also displayed in the BASESYS system pointsdisplay table.

Display Units AVAIL = Off, available for startingRUNNING = Running normallyRECYCLE = Load recyclingUNAVAIL = Unavailable, chiller under localcontrolRESTART = Restarting after power failureFAULTED = Safety shutdownCOMFAIL = CSM cannot communicate withthe chillerNOT USED = No chiller designated for thisnumberFAILSTOP = Failed to stop in 5 minutesFAILSTRT = Failed to start within theconfigured Start Fault Time.

Chiller 1–Chiller 8Commanded State

Chiller 1–Chiller 8Status

117

This point displays the percentage of this chiller’s operating capac-ity at which it is running.

Display Units %

This point displays the current LCW control point (setpoint) that theCSM is sending to this chiller.

Display Units Degrees

This point displays the current demand limit value that the CSM issending to this chiller.

Display Units %

This point displays the accumulated compressor runtime hours ofthis chiller. When runtime hours exceed 65535, the decision resetsto 0.

Display Units Hours

This point displays whether this chiller is enabled for automaticpower failure restart. If CSM power failure restart is desired, AutoPFR should be enabled in all chillers.


When, due to a problem condition, a chiller's status is set toFAILSTRT, this point is set to the number of minutes specified inthe Service Configuration Table's Clear Failstart Time decision andbegins to count down. When it reaches 0, the chiller's FAILSTRTstatus is cleared.

This point will also be set to 0 (and the chiller's FAILSTRT statuswill be cleared) whenever the System (BASESYS) Points DisplayTable's Clear Failstart Chillers decision is set to Yes.

Display Units 0 to 1440 minutes

Chiller 1–Chiller 8Current Capacity

Chiller 1–Chiller 8Current Control Point

Chiller 1–Chiller 8Current Demand Limit

Chiller 1–Chiller 8Service Runtime

Chiller 1–Chiller 8Auto PFR Configured

Reset Failstart Timer

118

The CSM contains a time schedule maintenance table,OCCDEFME. This table displays information about the operationof the time schedules.

The Time Schedule Maintenance Table is shown below. Descrip-tions of the individual decisions follow the figure. Each descriptionincludes the purpose of the decision and its valid display units.

Time ScheduleMaintenanceTable Decisions

Figure 22Time ScheduleMaintenance Table(OCCDEFME)

OCCDEFME

DESCRIPTION

Time Schedule

Mode

Mode

Current Occupied Period

Override Duration

Unoccupied Start Time

Next Occupied Day


PERIOD

MODE

OVERDURAhours

UNSTART

NXTOCCD

VALUE STATUS

0

0

0:00

1

0

Next Unoccupied Day

Last Unoccupied Day

NXTUNOD

PRVUNOD

Override in Progress No OVERLAST

Occupied Start Time 0:00 OCCSTART

Next Occupied Time 0:00 NXTOCCT

Next Unoccupied Time 0:00 NXTUNOT

Last Unoccupied Time 0:00 PRVUNOT

119

The value displayed here is 1 if the time schedule is in an occupiedmode or if a timed override is in effect. It displays the value 0 if thetime schedule is in an unoccupied mode.

Display Units 1 = Occupied0 = Unoccupied

This decision displays the number of the period that is occupied. Itdisplays 0 during unoccupied modes, and when a timed override isin effect.


This decision displays Yes if the mode is occupied because of timedoverride, the result of an operator configuring manual overridehours in the time schedule configuration table. It displays No whenthere is no timed override in effect.

Display Units Yes = Timed override activeNo = Timed override not in effect

When a timed override has been configured, the number of hoursthe override will be in effect is displayed here.

When there is no timed override in effect or pending, this decisiondisplays the value 0.

Display Units 0 to 4 hours

This field displays the Occupied From time for the period beingused. When a timed override is commanded during a scheduledunoccupied period, this decision displays the time at which thetimed override is commanded. Occupied Start Time displays thevalue 0:00 while the time schedule is in an unoccupied mode.

Display Units 0:00 to 24:00 (hour:minute of day)

Occupied Start Time

Override Duration

Current Mode

Current OccupiedPeriod

Override In Progress

120

While the time schedule is in an occupied mode, this decisiondisplays the hour and minute that the mode will go unoccupied. Ifthe time schedule is in an occupied mode with no timed override,the value displayed here is the same as the configured Occupied Totime.


This decision displays the day that the configured time schedule willmake its next transition from an unoccupied mode to an occupiedmode.

Display Units 1 to 7 (1 = Mon)

This decision displays the hour and minute of the day that theconfigured time schedule will make its next transition from anunoccupied mode to an occupied mode.


This decision displays the day that the configured time schedule willmake its next transition from an occupied mode to an unoccupiedmode. While the schedule is in an occupied mode, either scheduledor resulting from timed override, the decision displays the day thatthe current mode will end. While the schedule is in an unoccupiedmode, this decision displays the day that the next scheduled occu-pied period will end.


This decision displays the hour and minute of the day at which theschedule will make its next transition from an occupied mode to anunoccupied mode. While the schedule is in an occupied mode, eitherscheduled or resulting from timed override, the decision displayswhen the current occupied mode will end. While the schedule is inan unoccupied mode, the start of the next scheduled unoccupiedperiod is displayed.


Unoccupied Start Time

Next Occupied Day

Next Occupied Time

Next Unoccupied Time

Next Unoccupied Day

121

This decision displays the most recent day on which the schedulemade a transition from occupied mode to an unoccupied mode.


This decision displays the hour and minute of the day that theschedule most recently made the transition from an occupied modeto an unoccupied mode.


The CSM includes a WSM Equipment Part Cool Source Mainte-nance (WSMDEFME) Table for use in a system with a WSM optionmodule installed on the CCN. The table displays current status datain the WSM algorithms and the CSM.

An example of this table is shown below. Descriptions of the indi-vidual decisions follow. Each description includes the purpose ofthe decision and its valid display values.

Last Unoccupied Time

Last Unoccupied Day

Figure 23WSMDEFMEMaintenanceTable

WSMDEFMEMaintenanceTable Decisions

WSMDEFME

DESCRIPTION

Water System Manager

WSM Active?

WSM Active?

Equipment Status

Commanded State

CHW Setpt Reset Value


WSMSTAT

CHLRST%

^FCHLRENA

CHWRVAL

VALUE STATUS

No

Off

Disable

0.0Current CHW Setpoint 0.0 CHWSTPT

Chilled Water Temp 0.0 dF CHWTEMP

dF

122

This decision displays the status of the WSM algorithms and com-munication between the CSM and WSM.

This decision will display No if either of the following is true:

• No WSM is present, or WSM Program Status is Disabled• Communication with the WSM has failed


This decision displays the current chilled water supply temperature.


This decision displays the current status of the chillers. If anychiller’s status is On, this decision displays On. Otherwise, it dis-plays Off.

Display Units On/Off

This decision displays whether a WSM is commanding the CSMinto occupied mode. For more information on occupancy, refer tothe Time Schedule and Time Schedule Override description in theOverview chapter of this manual.

Display Units Enable = occupiedDisable = unoccupiedNone = no command

This decision displays the current CHW Setpoint Reset Valuedetermined by the WSM for the CSM. The chiller adds the CHWSetpoint Reset Value to its configured chilled water setpoint.CSM's internal setpoint reset function is disabled if WSM is active.

Display Units ^ Degrees F

This decision displays the effective CHW Control Point for theCSM, as determined by the WSM.


Chilled Water SetpointReset Value

Commanded State

Equipment Status

Chilled WaterTemperature

WSM Active?

Current Chilled WaterSetpoint

Configuration Sheets

123

Controller Name:_______________________________ Bus #___________ Element #___________

Table Description:______________________________________________ Table Name: CHILLERS

Sheet 1 of 2

DESCRIPTION VALUELIMITS

CHILLER CONFIGURATION TABLE CONFIGURATION SHEET

Element Number 0 - 239

0 - 9999

UNITS

Chiller 1

Capacity

Start Fault Timer 1 - 60

0 - 239

0 - 9999

1 - 60

0 - 239

0 - 9999

1 - 60

0 - 239

0 -9999

1 - 60

min

Chiller 2

Element Number

Capacity

Start Fault Timer min

Chiller 3

Element Number

Capacity


Chiller 4

Element Number

Capacity


Chiller 5

Element Number

Capacity

Start Fault Timer

0 - 239

0 -9999

1 - 60 min

124


Table Description:______________________________________________ Table Name: CHILLERS

Sheet 2 of 2


CHILLER CONFIGURATION TABLE CONFIGURATION SHEET

Element Number 0 - 239

0 - 9999

UNITS

Chiller 6

Capacity

Start Fault Timer 1 - 60

0 - 239

0 - 9999

1 - 60

0 - 239

0 - 9999

1 - 60

min

Chiller 7

Element Number

Capacity


Chiller 8

Element Number

Capacity


125


Table Description:______________________________________________ Table Name: SEQUENCE

Sheet 1 of 2


CHILLER SEQUENCING CONFIGURATION TABLECONFIGURATION SHEET

Capacity Step 1

UNITS

Chiller Sequence 1

Capacity Step 2

Add/Drop Chiller

Standby Chiller Number

Sequence Selection

Selection Type

Stop Day

Rotate By Runtime

Rotation Time

Rotation Day

0 to 3

1 to 31

No\Yes

0:00 - 23:59

1 to 8

1 to 8

No/Yes

0 to 8

1 to 8

1 to 8

Chiller Sequence 2

Capacity Step 1

Capacity Step 2

Add/Drop Chiller

Standby Chiller Number

No/Yes

0 to 8

Start Month

Start Day

Stop Month

1 to 12

1 to 12

1 to 31

1 to 7

126


Table Description:______________________________________________ Table Name: SEQUENCE

Sheet 2 of 2


CHILLER SEQUENCING CONFIGURATION TABLECONFIGURATION SHEET

Override Type

UNITS

Temperature Override

Override Hysteresis 0 to 180 to 10

^F^C

0 to 2

127


Table Description:_____________________________________________________ Table Name: OCCPC___S

1 of 2

Description Units ValueLimits

TIME SCHEDULE (OCCDEFCS) CONFIGURATION SHEET

Manual override hours

Occupied From

Occupied To

0 - 4

0/1

0:00 - 24:00

Period 1 Day of Week

0:00 - 24:00

Hour:Minutes






Occupied From

Occupied From

Occupied From

Occupied From

Occupied From

Occupied To

Occupied To

Occupied To

Occupied To

Occupied To

0/1

0/1

0/1

0/1

0/1

0:00 - 24:00

0:00 - 24:00

0:00 - 24:00

0:00 - 24:00

0:00 - 24:00

0:00 - 24:00

0:00 - 24:00

0:00 - 24:00

0:00 - 24:00

0:00 - 24:00

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hour:Minutes

Hours

128


Table Description:_____________________________________________________ Table Name: OCCPC___S

2 of 2


TIME SCHEDULE (OCCDEFCS) CONFIGURATION SHEET

Occupied From

Occupied To

0/1

0:00 - 24:00


0:00 - 24:00

Hour:Minutes


Occupied From

Occupied To

0/1

0:00 - 24:00

0:00 - 24:00

Hour:Minutes

Hour:Minutes

Hour:Minutes

129

1 of 1


Table Description:_____________________________________________________ Table Name: HOLDY___S


HOLIDAY CONFIGURATION SHEET

Start Month

Duration

0-12

0-31

0-99

Start Day

Days




Start Month

Duration

0-12

0-31

0-99

Start Day

Days




Start Month

Duration

0-12

0-31

0-99

Start Day

Days

130

1 of 1

Controller Name:_____________________________________ Bus #___________ Element #___________

Table Description:_____________________________________________________ Table Name: SETPOINT


SETPOINT CONFIGURATION SHEET


Temp Override Setpoint

BPV Delta P Setpoint

0 - 212 ˚F

-40 - 245

-40 - 245

Sequence Select OA Setpoint

0 - 999.9

˚F

PSI

˚F

131

Controller Name:______________________________________ Bus #___________ Element #___________

Table Description:______________________________________________________ Table Name: BRODEF

1 of 1


BROADCAST CONFIGURATION SHEET


Start Month

Start Day of Week

Start Week

Start Time

Start Advance

Stop Month

Stop Day of Week

Stop Week

Disable/Enable

1 – 7

1 – 5

00:00 – 23:59

HH:MM

Minutes

Daylight Saving

1 – 12

0 – 360

HH:MM

1 – 12

1 – 7

1 – 5

Stop Time 00:00 – 23:59

Minutes

Stop Back 0 – 360

132


Table Description:______________________________________________ Table Name: SERVICE

Sheet 1 of 2


SERVICE CONFIGURATION TABLECONFIGURATION SHEET


UNITS

Capacity Control

Proportional Gain

Integral Gain

Min Control Point Delta

Control Sensor, 0=CHWST

Setpoint Reset Function

Reset Type

Start Temperature

Stop Temperature

ACR Function

Setpoint Delta T

Pulldown Time

Lag Start Delay Time

Ramp Rate (%kW/Min)

Chiller Inhibit Time

1 – 120

Dsa/Ena

^F^C

0 – 240

min

min

1 or 2

0 – 5.0

-40 – 212-40 – 100

°F°C°F°C

^F^C

0.5 – 18.00.3 – 10

%

0 – 5.0

0 – 5.00 – 2.8

0 or 1

0 – 3

-40 – 212-40 – 100

Degrees Full Reset 0 – 180 – 10

^F^C

1 – 60 min

Soft Start Function

10 – 100

Pulldown Rate Limit

Clear Failstart Time

0.5 – 5.00.3– 2.8

^F^C

0 – 1440 min

ACR Demand Limit 50 – 99 %

133


Table Description:______________________________________________ Table Name: SERVICE

Sheet 2 of 2


SERVICE CONFIGURATION TABLECONFIGURATION SHEET

RCR Hysteresis

UNITS

RCR Function

RCR Correction Term

Power Fail Restart

PFR Delay Time

Threshold Time

Loadshed Function

Group Number

Demand Limit Decrease

Lag Stop Delay Time

0 – 1440

0 – 99

min

min

0 – 50

%

0 – 16

1 – 60 min

Maximum Loadshed Time 30 – 480

%

0 – 50 %

1 – 60

min

134


Table Description:______________________________________________ Table Name: SENSORS1

Sheet 1 of 1


SENSOR SERVICE CONFIGURATION TABLE CONFIGURATION SHEET

Sensor type

UNITS


Sensor trim


Sensor type

Sensor trim


Sensor type

Sensor trim

Load Delta Pressure

Sensor type

Input low value

Input low value

Sensor trim

0 – 2

0 - 2

PSI

%

0 - 2

0 - 2

0.0 – 999.9

Input high value 0.0 – 999.9

Base Module Channel 5

OAT/OVRD Sensor Select 0/1

External Demand Limit

Input high value

0 - 100

0 - 100 %

PSI

-18 – 18-10 – 10

^F^C

-18 – 18-10 – 10

-18 – 18-10 – 10

-18 – 18-10 – 10

^F^C

^F^C

^F^C

Remote Contact/Plant Switch 0 = Remote Contact1 = Plant Switch

135


Table Description:______________________________________________ Table Name: SENSORS2

Sheet 1 of 1


SENSOR SERVICE CONFIGURATION TABLE CONFIGURATION SHEET

Sensor type

UNITS

Backup Supply Water Temp

Sensor trim

Backup Return Water Temp

Sensor type

Sensor trim

Backup Load Return Temp

Sensor type

Sensor trim

Backup Load Delta Press

Sensor type

Input low value

Sensor type

Sensor trim

0 – 2

0 - 2

PSI

0 - 2

0 - 2

0.0 – 999.9

Input high value 0.0 – 999.9

Option Module Channel 5

OAT/OVRD Sensor Select 0/1

Optional Reset Temp

Sensor trim

0 - 2

PSI

-18 – 18-10 – 10

^F^C

-18 – 18-10 – 10

-18 – 18-10 – 10

-18 – 18-10 – 10

-18 – 18-10 – 10

^F^C

^F^C

^F^C

^F^C

136

Controller Name:______________________________________ Bus #___________ Element #___________

Table Description:______________________________________________________ Table Name: BYPASS

1 of 1


BYPASS VALVE SERVICE CONFIGURATION TABLE CONFIGURATION SHEET


Control type 0 – 2

Number of valves

System design delta T

Control loop gain

Output type

Open/CloseNormal position

^F

1 – 2

1 – 15

Valve 1

1 – 3

Valve 2

Output type

Normal position

1 – 3

Open/Close

Opening time 0 - 300 sec

0 – 990 –55

137


Table Description:______________________________________________ Table Name: ALARMS

Sheet 1 of 1


ALARMS SERVICE CONFIGURATION TABLECONFIGURATION SHEET

Realarm time 1 – 1440

UNITS

Alarm Control

Alarm routing

CHW Setpoint Hysteresis

Low limit

1 – 180.6 – 10

°F°C

-40 – 245-40 – 118.3

^F^C

min

00000000 – 11111111 binary


High limit -40 – 245-40 – 118.3

°F°C

Alarm or alert 0 or 1

Alarm level 0 – 6


Low limit

High limit

Alarm or alert

Alarm level

Load Delta Pressure

Low limit

High limit

Alarm or alert

Alarm level

-40 – 245-40 – 118.3-40 – 245-40 – 118.3

°F°C°F°C

0 or 1

0 – 6

0 – 999.9 PSI

0 – 999.9

0 or 1

0 – 6

PSI

138

Appendixes

139

Appendix A

Glossary

Additional Cooling Required. Thisalgorithm determines the need for anadditional chiller.

Carrier Comfort Network

Chilled Water

Chilled Water Supply Temperature. Thisis the temperature of the water supply tothe building from the chiller plant.

Chilled Water Return Temperature.This is the temperature of the waterreturned from the building to the chillerplant.

Chiller System Manager III

Entering Chilled Water. This is thetemperature of the water entering anindividual chiller.

Leaving Chilled Water. This is thetemperature of the water leaving anindividual chiller. The term "LCWcontrol point" is synonymous with"chiller setpoint."

Outside Air Temperature

Power Fail Restart. This algorithmenables the CSM to begin functioningautomatically after a power outage.

This appendix defines the acronyms used in this manual.

ACR

PFR

OAT

CCN

CHW

CHWST

CHWRT

CSM III

ECW

LCW

140

Reduced Cooling Required. This algo-rithm determines when a chiller can bestopped.

RCR

141

Appendix B

As part of the CCN, BEST and BEST++, Carrier’s custom program-ming languages, can read and write to the values of certain points inthe CSM. Points that BEST and BEST++ can only read the values ofare referred to as Read Only. Points that BEST and BEST++ canchange and read are referred to as Read/Write.

CSM points that are Read Only or Read/Write can be used with theData Collection Option.

CSM points that are Read Only can be used as sources with the DataTransfer Option. Points that have both Read/Write capability can beused as either Data Transfer sources or destinations.

Tables 5 through 9 list the CSM points that can be accessed byBEST and BEST++ on the CCN. These tables also indicate thenetwork Read Only or Read/Write capability of each accessiblepoint.

Network Access

Data Collection

Data Transfer Option

Read/Write Access

142

Table 5BASESYS Table NetworkAccess

Description Point Name Capability

Program status PSTATUS Read/WriteCooling Active COOLING Read/WriteAlarm status ALRMPT ReadOnlySupply Water Temperature CHWST Read/WriteReturn Water Temperature CHWRT Read/WriteResequence Chillers Now RESEQCH Read/WriteClear Failstart Chillers CLRFAIL Read/WriteCurrent Sequence Number CURRSEQ Read OnlyCurrent Step Number CURRSTP Read OnlyCurrent Lead chiller CLEADCH Read OnlyCurrent Lead chiller status CLEADST Read OnlyCurrent 1st Lag chiller C1LAGCH Read OnlyCurrent 1st Lag chiller status C1LAGST Read OnlyCurrent 2nd Lag chiller C2LAGCH Read OnlyCurrent 2nd Lag chiller status C2LAGST Read OnlyCurrent 3rd Lag chiller C3LAGCH Read OnlyCurrent 3rd Lag chiller status C3LAGST Read OnlyCurrent 4th Lag chiller C4LAGCH Read OnlyCurrent 4th Lag chiller status C4LAGST Read OnlyCurrent 5th Lag chiller C5LAGCH Read OnlyCurrent 5th Lag chiller status C5LAGST Read OnlyCurrent 6th Lag chiller C6LAGCH Read OnlyCurrent 6th Lag chiller status C6LAGST Read OnlyCurrent 7th Lag chiller C7LAGCH Read OnlyCurrent 7th Lag chiller status C7LAGST Read OnlyCurrent Add/Drop Chiller CADDPCH Read OnlyCurrent Add/Drop Chiller status CADDPST Read OnlyCurrent Standby Chiller CSTBYCH Read OnlyCurrent Standby Chiller status CSTBYST Read Only


Base Module PointsSupply Temperature PCHWST Read OnlyReturn Temperature PCHWRT Read OnlyLoad Return Temperature PCHWLRT Read OnlyLoad Delta Pressure PCHWLDP Read OnlyOverride/OA Temp POVRTOA Read OnlyExternal Reset Input RSTINPT Read/WriteExternal Demand Input DEMINPT Read/WriteRemote Contact Input REMCON Read/Write

Table 6POINTS1 Table NetworkAccess

143

Table 7POINTS2 Table NetworkAccess


Optional Module PointsSupply Temperature BCHWST Read/WriteReturn Temperature BCHWRT Read/WriteLoad Return Temperature BCHWLRT Read/WriteLoad Delta Pressure BCHWLDP Read/WriteOverride/OA Temp BOVRTOA Read/WriteOptional Reset Temp OPTRSET Read/Write

Note: The sensors must be configured as type 1 or 2 in theSENSORS2 Configuration Table to be network accessible.


Current Delta T CDELTAT Read OnlyDelta T Control Point DTCTLPT Read OnlyLoad Delta Pressure CHWLDP Read/WriteDelta P Control Point DPCTLPT Read OnlyLoad Return Temperature CHWLRT Read/WriteFlow Bypassed FLOWBYP Read OnlyValve 1 Output BPV1OUT Read/WriteValve 2 Output BPV2OUT Read/Write

Table 8BYPASS Table NetworkAccess

144

Table 9BASEMAIN Table NetworkAccess


CSM Status CSMSTAT Read OnlyPulldown Time Remaining PULLTIME Read/WritePFR Delay Timer PFRTIME Read OnlyAny Chiller Faulted CHILFLT Read OnlyAny Backup Sensr Active BACKUPA Read OnlyTemp Averaging Active TMPAVGA Read OnlyCooling Active COOLING Read OnlyMode COOLMOD Read OnlyOverride Temperature OVRDTMP Read/WriteStep 1 CSEQSTP1 Read OnlyStep 2 CSEQSTP2 Read OnlyStandby Chiller Number CSTANDBY Read OnlyCurrent Control Point LCW_STPT Read OnlyCurrent Demand Limit DEM_LIM Read OnlyMaximum Demand Limit MAXDEM Read/WriteCurrent CHW Setpoint CTLSET Read OnlyCurrent CHW Temperature CTLTMP Read OnlyAverage Chiller Load AVGLOAD Read OnlyReset Value RSTVAL Read OnlyOutside Air Temperature OAT Read/WriteOptional Reset Temp OPTRST Read/WriteACR Conditions True ACRFLAG Read OnlyTime To Start Chiller STRTTIM Read OnlyNext Chiller To Start NXTSTRT Read OnlyStart Fault Timer STRTFLT Read OnlyPulldown Rate PULLRATE Read OnlyCSM Capacity Exceeded FULLCAP Read OnlyInhibit Chiller Startup INHIBIT Read OnlyRCR Conditions True RCRFLAG Read OnlyRCR Corrected Setpoint RCRCSET Read OnlyTime To Stop Chiller STOPTIM Read OnlyNext Chiller To Stop NXTSTOP Read OnlyRedline REDLINE Read OnlyLoadshed LOADSHED Read OnlyLoadshed Timer LOADTIME Read Only

145

Appendix C

System FlowchartsThis appendix contains flowcharts of CSM system functions.

146

N

Program status AND

cooling active = YES?

N

Y

ACR conditions TRUE = YES

Decrement time to start

N

ACR conditions

TRUE = NO

Start lag chiller

T ime to start = 0? AND CSM

system status = STDYSTAT

Y

Y

S tart

Exit

Additional Cooling Required (ACR)runs every 60 seconds

Are the following conditions TRUE?

1. PFR delay timer expired

2. Current CHW temp > (Current CHW

setpt + setpt ∆T)

3. Current demand limit > ACR Demand Limit

4. Pulldown rate < Pulldown Rate Limit

5. If bypass valve(s) present and all chillers

have equal capacity, then OCFB < =

80%

147

N

BPV ctrl type = 1?

N

Valve 1 = BPVValve 2 = BPV

Y

No chiller running?

F rom BPV ctrl point algorithm

Bypass Valve Control Algorithm

Sensor value = CHWRT - CHWST

Setpoint = BPV ctrl ptError = Sensor value - setpointKp = BPV gain ∗ 1.5Ki = BPV gain ∗ 0.15

Y

Number of values = 2?

Y

N

Y

E xit

N

Y

Sensor value = CHWLD?

~ ∆P control ~ ∆T control

BPV = (Kp ∗ Error) +((Ki ∗ Error) + previous I) + 33.3%

New chiller command to START?

N

Clear integralterm

BPV > = 33.3%?

Valve 1 = 3 ∗ BPVValve 2 = 0

Valve 1 = 100%Valve 2 = 0.5 ∗ ((3 ∗ BPV) - 100)

60 Seconds before starting,value 1 & 2 = 100%

148

N

BPV ctrl type > 0?

N

BPV ctrl pt =∆P setpoint

Y

Has a new chiller been started?

S tart

To BPV control algorithm

Bypass Valve Control PointAlgorithm

BPV ctrl type = 1 (∆T)?

No chillers commandedSTART OR current capacity =

0% for all chillerscommanded START?

Y

∆T ctrl pt = ∆T ctrl pt + 0.1 n close BPV

Y

∆T ctrl pt > ctrl ptfor ANY chiller?

∆T ctrl pt = ∆T ctrl pt - 0.1 n open BPV

BPV ctrl pt = ∆T ctrl pt

Y

N

∆T ctrl pt = 0delay 60 sec

N ∆T ctrl pt < ctrl ptfor all chillers?

Y

E xit

N

N

Y

Calculate ctrl pt for each running chiller:(current capacity n ∗ system design ∆T)/100 for nonrunning chillers ctrl pt = systemdesign ∆T

149

N

Program status =Enable AND cooling

active = YES?

N

Send LCW_STPT = CHW setptand dem_ lim to all runningchillers

Y

Pgain OR Igain > 0?

S tart

E xit

Capacity Control Type 1(LCW Setpoint)

Dem_lim = Maxdemand limit

CSM status = PulldownOR ramping?

Y

N

Send LCW_STPT and dem_ lim toall running and available chillers

Y

LCW_STPT < mincontrol point?

LCW_STPT = min control point

LCW setpt > controlsetpt + 5 ˚F?

LCW setpt = CHW setpt + 5 ˚F

N

Y

Y

N

LCW_STPT = (CHW setpt - CHW temp) ∗Pgain) + ((CHW setpt - CHW temp) ∗Igain + previous I) + CHW setpt

150

N

Program status =Enable AND cooling

active = YES?

Y

CSM status = Ramping?

S tart

E xit

Capacity Control Type 2(KW Balancing)

Dem_ lim = Maxdemand limit

CSM status = Pulldown?

Y

Send LCW_STPT and dem_ lim toall running and available chillers

Clamp dem_limbetween 0% andmax dem_ lim

N

Y

Dem_ lim =Ramping

N

LCW_STPT = Min control

Dem_ lim = ((CHW_temp - CHW setpt)∗ Pgain) + ((CHW temp - CHW setpt ∗

Igain + previous I) + starting value (80%)

151

N

Program status ANDcooling active = YES?

N

Y

RCR conditions TRUE > YESDecrement time to stop

N

RCR conditionsTRUE = NO

Start lag chiller

T ime to start = 0? AND CSMsystem status = STDYSTAT

Y

Y

S tart

E xit

R educed Cooling Required (RCR)runs every 60 seconds

Are the following conditions TRUE?1. More than 1 chiller running?2. Avg. chiller load < = corrected

RCR setpt3. Current CHW temp < current

CHW setp + (setpt ∆T ∗ 0.6)

152

N

Program status =Enable?

Y

N

Use chillersequence 1

Y

Are sequence select criteria TRUE?

Type 1: OAT > seq sel OA setpt?

Type 2: Calendar date between configured

start/stop dates?

Type 3: Either Type 1 or 2 conditions are TRUE?

S tart

E xit

Sequence Selectionruns every 60 seconds

Cooling activetransitioned from NO to

YES?

Sequence selectiontype > 0?

Y

Y

N

N

Use chillersequence 2

Index

153

Index

C

Capacity Control 19configuring types 81proportional gain used in 81types of 19

Capacity Matching 30Cases of Auto. Program Disabling & Alarm

Cond. 31CCN Communication Bus 4CCN Options

Data Collection 41Data Transfer 41Loadshed 40Water System Manager 40

Chilled Water Resetspecifying method 83

Chilled Water Setpoint Reset 21Chiller Availability 12Chiller Compatibility 2Chiller Control Functions

superseded by CSM functions 13Chiller Control Point 20Chiller Fault Determination 30Chiller Information 9Chiller Inhibit Time 112Chiller Load 9Chiller Maintenance Tables 115Chiller Status 9, 116CHILLER1 – CHILLER8 Maintenance Tables 115CHILLERS Configuration Table 59CHILLERVISOR System Manager III (CSM III)

alarm status 45base module 6CCN Bus communication 4chiller compatibility 2disabling 45enabling 45functions 9illustration 5input channels 13operator interfaces 7optional module 6purpose 2, 9sensor connections 4system layout 2

CHWRT Sensor 82CHWST Sensor 82Configuration Tables

BRODEF 74CHILLERS 59HOLDY01S – HOLDY18S 70OCCDEFCS 68

A

ACR Algorithm 15, 16, 111example 17

ACR Control Sensordefault 13

ACR Sequencing Mode 18fixed 18runtime equalization 18

Acronymsused in manual 139

Add/Drop Capability 10configuring 10sequencing 15

Add/Drop Chiller 62configuring 63sequencing 15

Additional Cooling Required (ACR) Algorithm 15Alarm Conditions 7, 31Alarm Limits 30Alarm Messages 32Alarm Status 45Alarm/Alerts

priority levels 103ALARMS Service Configuration Table 99Alarms/Alerts 6Algorithms

Additional Cooling Required (ACR) 15, 16, 111Reduced Cooling Required (RCR) 15, 112Water System Manager (WSM) 122

Automatic Chiller Start/Stop 15Automatic Program Disabling and Alarm Condi-

tions 31

B

Base Moduleconfiguring sensors 90inputs 13outputs 14

BASEMAIN Maintenance Table 105BASESYS Points Display Table 43BEST and BEST++ 141BRODEF Configuration Table 74BYPASS Points Display Table 55BYPASS Service Configuration Table 96Bypass Valve Control 27

defaults 27differential temperature setpoint calculation 29types of 28using differential pressure 28using differential temperature 28

154

SEQUENCE 62SETPOINT 72

Cooling Activedetermination 11modes 11status 11

Custom Programming Languages 141

D

Data Collection Option 41, 141Data Transfer Option 41, 141Daylight Saving Time

configuring 74Deadband Value 12, 67Demand Limiting 24

automatic 24manual 24

DisablingCSM III 45due to alarm conditions 7operating programs 31

E

Enabling/DisablingCSM III 45

F

FAILSTART Fault 46Failstart Mode 16Functions

ACR Sequencing Modes 18Additional Cooling Required (ACR) Algo-

rithm 15, 16Automatic Chiller Start/Stop 15Automatic Program Disabling and Alarm Condi-

tions 31Bypass Valve Control 27Capacity Control 19Chilled Water Setpoint Reset 21Chiller Availability Determination 12Chiller Fault Determination 30Chiller Start/Stop Sequencing Modes 10Cooling Active Determination 11Demand Limiting 24Hardwired Sensors Alarm Limits 30Hardwired Temperature Sensors Configura-

tion 13Manual Program Enable/Disable 10Mixed Plant Capability 10New Chiller Inhibit Time 19Outside Air Temperature 15

Power Fail Restart 39Ramp Loading 20Reduced Cooling Required (RCR) Algorithm 24Remote Start Contact 11Standby Chiller Support 11Temperature Override 12Time Schedule 12Time Schedule Override 12, 67

H

Hardwired Sensors Alarm Limits 30Hardwired Temperature Sensors 13High Alarm Limit 31, 102, 103HOLDY01S – HOLDY18S Configuration Tables 70Holiday Configuration Tables 70

I

Input Channel 5base, optional module configuration 54

Input Channelson base module 13on optional module 13

K

kW Balancing 20

L

Lag Chillerscriteria for starting 15, 16criteria for stopping 24

Lead Chillercurrent status 47rotation if faulted 30starting 12, 15

Loadshed 89Loadshed Option 40, 89Low Alarm Limit 30, 102

M

Maintenance TablesBASEMAIN 105CHILLER1 – CHILLER8 115OCCDEFME 118WSMDEFME 121

Manual Program Enable/Disable 10Messages

alarm 32return to normal 32

Mixed Plant Capability 10

155

N

Network Access 141Network Functions 40

Data Collection Option 41Data Transfer Option 41Loadshed Option 40Water System Manager (WSM) Option 40

New Chiller Inhibit Time 19

O

OAT 15CCN broadcast 15, 54sensor 15

OCCDEFCS Configuration Table 68OCCDEFME Maintenance Table 118Operator Interfaces 7Optional Module

configuring sensors 94inputs 13

Output Channelson base module 14

Outside Air Temperatureas control temperature 15

P

Plant Switch Configuration12Points Display Tables

BASESYS 43BYPASS 55POINTS1 49POINTS2 52

POINTS1 Display Table 49POINTS2 Display Table 52Power Fail Restart 13, 39Power Outages

automatic recovery from 40Program Disabling 31Pulldown Time 15

R

Ramp Loading 20RCR Algorithm 24, 112

example 26RCR Corrected Setpoint

calculating 25Re-enabling CSM

after alarm 7Read/Write Access 141Reading and Writing to Points 141Reduced Cooling Required (RCR) Algorithm 15Remote Contact Wiring Diagram 14

Remote Start Contact 11Resequencing

at any time 11Return to Normal Messages 32Return Water Temperature Sensor (CHWRT)

alarm/alert 6Runtime 9, 11

S

Sensor Connections 4Sensors

failure 7hardwired temperature 13optional 6required 5types 5

SENSORS1 Service Configuration Table 90SENSORS2 Service Configuration Table 94SEQUENCE Configuration Table 62Sequence Rotation 11Sequencing

capacity steps 63modes 10seasonal 10, 62, 64

SERVICE Configuration Table 79Service Configuration Tables 79

ALARMS 99BYPASS 96SENSORS1 90SENSORS2 94SERVICE 79

SETPOINT Configuration Table 72Setpoint Reset

disabling 23temperature inputs for 21

Soft Loading 21Standby Chiller

configuring 64when started 11

Standby Chiller Support 11Starting sequence

initial determination 16Status Display Tables

BASESYS 43BYPASS 55POINTS1 49POINTS2 52

Supply Water Temperature Sensor (CHWST)alarm/alert 6

System Functionsflowcharts of 145

System Layout 2System Status 107

156

T

Temperature Override 12Temperature Sensors 13Time Schedule 12

Configuration Table 68Maintenance Table 118

Time Schedule Override 12, 67

W

Water System Manager (WSM) Option 40WSM Algorithms 122WSMDEFME Maintenance Table 121

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Attn: CCN Documentation

808 - 957 Rev. 01/08

CHILLERVISOR System Manager IIIManual Revisions The CHILLERVISOR System Manager III Overview and Configuration Manual is catalog number 808-957, Rev. 1/08. This revision replaces catalog

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