Catalog C: 1160-9 Vertical Water Source Heat Pumps Unit Sizes 1 /2 to 5 Tons (2.1 to 15.0 kW) ® R M A N U F A C T U R E R C E R TIFIE D TO A R I A S C O M P L Y I N G W I T H I S O S T A N D A R D 1 3 2 5 6 -1 H E A T P U M P S W A T E R T O A IR B R IN E T O A I R
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Catalog C: 1160-9
Vertical Water Source Heat PumpsUnit Sizes 1⁄2 to 5 Tons(2.1 to 15.0 kW)
®
R
MA
NU
FAC
TURE
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CERTIFIED TO ARI AS COMPLYIN
GW
ITH
ISOSTANDARD 13256-1
HEAT PUMPS
WA
TE
RTO
AIR BRINETO
AIR
Page 2 / Catalog 1160
Vertical water source heat pump units
Features:m High efficiency. EERs from 10.4 to 12.0
COPs from 3.8 to 4.0.m Performance rated with ISO Standard 13256-1.m Safety agency listed with CETL.m Multiple panels for easy accessibility to
compressor and fan sections.m Removable fan motor/wheel assembly.m Two return air configurations.m High and low side refrigerant service valves.
(7/00)
. . . and featuring the Mark IV/AC control system with:m Built-in night setback, load shed, shutdown,
and 2-hour override operation.m Compressor short cycle protection.m Random start.m Silent reversing valve operation.
m LED readout.m Condensate overflow protection.m Automatic defrost cycle.m Optional boilerless system control.m Optional pump restart.
m Multi-space fan motor with terminal strip.m High cfm/ton performance.m High sensible cooling performance.m Low unit height.m Circuit board control system for “clean”
wiring.m Freezestat protected water circuit.m Optional extended range heating operation.m Fully rated 50 cycle units.
The information in this catalog supersedes and replaces previous (catalogues)(bulletins) with regards to AAF-McQuay TerminalAir Conditioning products. Illustrations cover the general appearance of AAF-McQuay products at the time of publication and
AAF-McQuay reserves the right to make changes in design and construction at anytime without notice.
. . . and even more control options and accessory itemsfor a complete water source heat pump installation.
Unit Sizes007, 009 & 012
Unit Sizes015 & 019
Unit Sizes024 & 030
Unit Sizes036 & 042
Unit Sizes048 & 060
Catalog 1160 / Page 3
ContentsModel nomenclature ...................................................... 3ISO performance data ................................................... 4Design features .............................................................. 5Control features ............................................................. 7Airflow correction factors ............................................ 1250 cycle correction factors .......................................... 12Operating limits ............................................................ 13Capacity data ............................................................... 14
Physical data ............................................................... 36Fan performance data ................................................. 36Electrical data .............................................................. 37Dimensional data ......................................................... 38Typical Mark IV unit wiring diagrams .......................... 39Typical Microtech unit wiring diagrams ...................... 40Thermostat connection diagrams ............................... 41Engineering guide specifications ................................ 42
NOTE: For illustration purposes only. Not all options available with all models.Please consult AAF-McQuay Sales Representative for specific availability.
AAF-McQuay WSHP Product Nomenclature
W FMS 1 009 E Z
Product CategoryW = WSHP
Product IdentifierSee box below
Design Series1 = A Design2 = B Design3 = C Design4 = D Design5 = E Design
ISO performance dataRated in Accordance With ISO Standard 13256-1
UNIT SIZE AIRFLOW VOLTAGECFM L/S
WATERFLOWGPM L/S
HEATINGCOP
COOLINGEER COPBTU/HR BTU/HR
Notes:EER = Energy Efficiency Ratio COP = Coefficient of Performance L/s = liters per secondCooling capacity is based on 80˚F (27˚C) db, 67˚F (19˚C) wb entering air temperature and 85˚F (29˚C) entering, 95˚F (35˚C) leaving water termperature.Heating capacity is based on 70˚F (21˚C) db entering air temperature and 70˚F (21˚C) entering water temperature.
Each water source heat pump is factory assembled andtested to insure reliability. Servicing is done easily throughlarge removable access panels to internal components. Afull height access panel on the back side allows access tothe compressor and fan section. An upper front panel allowsaccess to the fan motor. Two lower panels allow access tothe compressor/control box section. Each unit is shippedon a wooden skid to facilitate moving with a forklift andcovered with corrugated material for maximum protection.
Five unique cabinet sizes make up our 1/2 through 5 ton(2.1 through 15.0 kW) vertical heat pump product line. Theresult is a consistent cabinet shape with the lowest possibleprofile. The consistent shape makes layout simple; the water,condensate and duct connection locations are the same forall units.
For maximum flexibility, each unit is available in either aleft-hand or right-hand return air arrangement to provide theoptimum piping location and service access.
The cabinet is constructed of unpainted, G-60 galvanizedsteel. Large panels are provided for access to the fan/motorcompartment and the compressor/control compartment. Theinteriors of the top and side panels and the bottom of theunit are covered with 1⁄2" thick (13 mm), 11⁄2 lb. (681 g) densitycoated glass fiber. The 1" (25 mm) thick filter is supportedby factory mounted brackets which allow for face, side orbottom removal.
The water and condensate connections protrude throughthe outside of the cabinet for maximum accessibility. The
water connections are FPT type for easy connection toflexible hoses. The large 7/8" (22 mm) O.D. condensateconnection assures trouble-free condensate removal.
The electrical components are located in the compressorsection of the unit. Holes provided on the side of the cabinetto facilitate main power and low voltage control wiringthrough separate holes. All wiring connections are madeinternal to the cabinet for maximum safety. Each unit is ratedto accept time delay fuses or HACR circuit breakers forbranch circuit overcurrent protection.
The control box is accessible through a panel and canbe moved without access to the side of the unit to allow foreasier compressor removal. The control box houses themajor operating electrical controls including the controlcircuit board, transformer, compressor relay and fan relay.Each component is accessible for service or replacement.
Two unique control systems are offered: Mark IV/AC orMicroTech®, each utilizing a printed circuit board. The printedcircuit board approach allows for direct quick-connect wiringto the controlled components making for “clean” wiring. Eachcontrol board receives power from a large capacity 50 VAtransformer. The control board has a built-in terminal stripfor low voltage control wiring connections. The Mark IV/ACcontrol board provides the basic control functions along withthe numerous advanced features. MicroTech is an advanceddirect digital control system. See the “Controls” section formore detailed information.
Page 6 / Catalog 1160
Refrigeration systemThe refrigeration system includes a hermetic compresser,reversing valve, water-to-refrigerant coaxial heat exchanger,capillary tube expansion device, airside coil, safety controls,and both high and low refrigerant service valves. Two panelsallow for access to the compressor, reversing valve andsafety controls.
The compressor is isolated from the bottom panel withrubber isolators. The compressor junction box is alwayslocated toward the front access panel.
The reversing valve is located so as not to interfere withcompressor removal through the access panel. The valve isenergized in the heating mode and will “fail-safe” to thecooling mode which is the predominate mode of operation.
The two heat exchanger components incorporate themost recent transfer technologies. The coaxial heatexchanger has a copper inner tube and a steel outer tubeand is designed for a maximum heat transfer at normal andlow water flow rates with minimum pressure drop. The largeface area coil has copper tubes and aluminum fins. The finsare lanced and the tubes have finned edges on the inside toenhance heat transfer capabilities.
Safety controls include low suction temperature(freezestat) and high pressure switches to lock outcompressor operation at extreme conditions. The low suctiontemperature switch provides the most reliable protectionagainst freezeup of the coaxial heat exchanger without thenuisance trips associated with low pressure switches whichonly protect against low refrigerant charge. The safetycontrols can only be reset from the main disconnect switchand not from the wall thermostat which preventsunauthorized reset of the unit, which may permanentlydamage a major component.
Fan sectionThe fan section includes the fan housing, fan wheel, fanmotor and drain pan. The fan section is separated from thecompressor section with an insulated drain pan and dividerpanel for maximum sound attenuation. The upper panelprovide service access to the fan motor. The separate frontfan and compressor section access panels allow for fanoperation and compressor operation checkout without airbypass around the coil.
The drain pan is of ample height to allow for self-primingof the condensate trap. All of this assures trouble-freecondensate removal.
The fan motor is a multispeed, PSC type with integralmounting brackets and thermal overload protection. Themotor is isolated from the fan housing for minimum vibrationtransmission. Unit sizes 015 and larger have a terminal stripon the motor for simple motor speed change without goingback to the control box. All the fan/motor assemblies havea removable orifice ring on the housing to accommodatemotor and fan wheel removal without disconnecting theductwork. The fan housing protrudes through the cabinetallowing adequate material for connection of a flexible duct.
Optional factory installed featuresExtended range units are available for applicationsrequiring heating operation at reduce entering conditions.The extended range unit will operate at 40°F (5°C) minimumentering water temperature and 40°F (5°C) minimum enteringair temperature. The unit is modified with a suction line
accumulator, insulated coaxial heat exchanger, insulatedrefrigerant tubing, compressor crankcase heater and a lowersetting on the freezestat safety switch.
The extended range system has advantages in closedloop applications. The ability to operate at reduced waterconditions allows the loop water temperature to fall to 40°F(5°C) before supplemental (boiler) heat has to be added tothe loop, thus taking full advantage of the heat available inthe water loop obtained from internal heat gains. The resultis reduced boiler operation which means reduced energyconsumption.
Left-handreturn
Right-handreturn
Catalog 1160 / Page 7
Mark IV/AC control systemThe Mark IV/AC control system is specifically designed forour water source heat pump units and provides control ofthe entire unit as well as outputs for unit status and “fault”detection. The built-in safety and operating features of theMark IV/AC control system assure safe operation of the unitwhich extends the equipment life.
The Mark IV/AC control system is a microprocessor-basedcontrol board conveniently located in the unit control sectionfor accessibility. The Mark IV/AC control board has quick-connect terminals for simple connection of controlcomponents. A 14-pin low voltage terminal strip providesall the necessary terminals for control connections. LEDsare located in front for quick inspection. The board is 24 voltAC at the thermostat.
The Mark IV/AC control system requires standard typeheating and cooling mercury bulb wall thermostats; there isno need for special “heat pump” thermostats.
The Mark IV/AC control system has the following operatingfeatures:
• Start-up. The unit will not operate until all the inputs andsafety controls are checked for normal conditions.
• Cooling Mode. On a call for cooling, the compressor andfan will start 0 to 32 seconds later. When satisfied, thecompressor and fan shut off immediately.
• Heating Mode. On a call for heating, the reversing valveis energized after 60 seconds and the compressor andfan start immediately. When satisfied, the compressor andfan shut off immediately, the reversing valve isde-energized 60 seconds later to eliminate “swish” noiseand to insure that the compressor always starts up atequalized pressure.
• Short Cycle Protection and Random Start. Each timethe compressor stops, a new random compressor startdelay time between 180 and 212 seconds is generatedeach time power is applied to the unit. This preventscompressor short cycling and assures units will not startat the same time after coming back from an unoccupied cycle.
• Unoccupied Mode. A simple “grounded” signal, no powersource required, puts the unit into the unoccupied modefor night setback operation. The fan shuts off and the unitis put under control from the setback bulb of thethermostat; the day heating thermostat control and coolingis locked out. Not connecting the setback temperatureterminal of the wall thermostat accomplishes a simple“shutdown” mode. A unique LED status is generated forindication of the unoccupied mode. On a call for heating,the fan and the compressor will start after 0 to 32 seconds.
• Override Mode. A switch on the deluxe thermostat canbe activated during the unoccupied mode to put the unitback into the occupied mode for two hours for after-hoursheating or cooling.
• Pump Restart. A signal from the Mark IV/AC board to ourLoop Water Control Panel will restart the water circulatingloop pump when the compressor is energized.
• Load Shed. Again, a simple grounded signal puts the unitinto the load shed mode. The compressor shuts off andthe fan will start on a call for heating or cooling.Compressor power consumption is eliminated and the fanoperation will mask the fact that heating and cooling
Control Features
operation has been temporarily suspended. A unique LEDstatus is generated for indication of the load shed mode.
• Brownout Protection. The Mark IV/AC board measuresthe input voltage and will suspend compressor and fanoperation if the voltage falls below 80% of the nominalline voltage. A unique LED status is generated and anoutput signal is made available for connection to a “fault”LED at the thermostat.
• Unit Shutdown. Again, a simple grounded signal puts theunit into the shutdown mode. Compressor and fanoperations are suspended. A unique LED status isgenerated and an output signal is made available forconnection to a “fault” LED at the thermostat.
• Condensate Overflow Protection. The Mark IV/AC boardincorporates a liquid sensor at the top of the drain pan.Sensing water, cooling operation is suspended. A uniqueLED status is generated and an output signal is madeavailable for connection to a “fault” LED at the thermostat.Heating operation is not suspended in this mode.
• Safety Control. The Mark IV/AC board receives separateinput signals from the refrigerant high pressure switch andthe low suction temperature (freezestat) switch. In a highpressure situation, compressor operation is suspended.In a low temperature situation, the unit goes into a defrostcycle where the unit is put into cooling operation for 60seconds which will assure that the coaxial heat exchangeris free of ice. Each switch generates its own unique LEDstatus and an output signal is made available forconnection to a “fault” LED at the thermostat if eithersituation exists.
• Testing. The Mark IV/AC board allows service personnelto eliminate the fan, reversing valve and compressor timedelays for faster diagnostics. The output terminals andexposed quick-connect terminals allow troubleshootingwith a voltmeter.
Mark IV/AC and fault outputs
IndicationLEDs Fault
Yellow Green Red OutputNormal Mode Off On Off OffHigh Pressure Fault Off Off Flash OnLow Temperature Fault Flash Off Off OnCondensate Overflow On Dim Off OnBrownout Off Flash Off OnLoad Shed Off Off On OffUnoccupied Mode On On Off OffUnit Shutdown Off Flash Off On
Page 8 / Catalog 1160
GroundTime Clock
inOccupied Mode
Unit1
Unit2
Unit3
ToAdditional
Units
The Mark IV/AC control system allows for the followingoptional field installed controls and accessories:
• Boilerless System Kit. Eliminates the need for a boiler inthe system water loop. The boilerless system control boardsenses the entering water temperature to the unit andlocks out compressor heating operation if the watertemperature falls below the adjustable setpoint. Contactsare provided to energize a field supplied electric heaterdownstream of the unit on a call for heating.
• Auxiliary Relay. Available to control other devices whenthe fan operates. The relay can also be factory mounted.
• Multiple Unit Control Panels. Allow a single thermostatto control up to three units in parallel.
• Motorized Valve. Used for variable pumping applications.The valve is wired in the compressor circuit and is pipedin return water line from the unit. The valve opens whenthe compressor is on and closes when the compressor isoff. Valve is rated for 300 psig (2070 kPa).
To activate the unoccupied mode for units on the same clockschedule, a single wire can be “daisy chained” between unitsand simply grounded through the time clock contacts. Thesame system can also be done to activate the load shed andemergency shutdown modes by running additional wiresbetween units to ground.
Field wiring to activate unoccupied mode
Catalog 1160 / Page 9
Loop Water Controller (LWC)
The Loop Water Controller (LWC) is a stand-alone,preprogrammed, pre-tested, microprocessor-basedcontroller providing control of the heat rejection, heat additionstages and the water circulating pumps for control of a watersource heat pump system through solid-state output relays. The controller has a keypad/display to view all statusconditions, temperatures, setpoints and monitor/alarmconditions. The display is two lines by sixteen columns in asupertwist LCD format. The LWC can be applied to control a traditional single loopsystem; closed circuit evaporative cooler, boiler, primarypump and standby pump; or a two-loop system with theheat pump loop having a boiler, primary pump and standbypump separated by a water-to-water heat exchanger to acondenser water loop with an open cooling tower, primary(stage 1) pump and a standby (stage 2) pump. The pumpscan be operated as “auto” or “manual” lead-lag. Pumpsequencing allows the standby pump to automatically comeon upon failure of the lead pump as indicated by a flowswitch. The LWC controls heating and cooling stages from the heatpump loop supply temperature and from the outdoor airtemperature for reset of the heat addition setpoint, if desired.Other locations can be temperature monitored: heat pumploop return temperature, entering and leaving towertemperatures, entering and leaving boiler temperatures, andstorage tank temperature. Clock schedule outputs are built-in to (1) time control theheat pump circulating pump for shutdown at night (can berestarted if outdoor air temperature falls) and (2) provideprogrammable time schedules for heat pump unit occupied/unoccupied operation. A maximum of six time clock scheduleoutputs are available. Two LWC models are available. LWC-16 and LWC-24provide 9 and 17 configurable outputs, respectively, choosingbetween heat rejection (cooling) stages, heat addition(heating) stages and time clock schedules. Each heating andcooling output has individual on and off (differential) setpointadjustment capability. Modulating heating and cooling outputsignals are available to control tower bypass valve and two-way or three-way boiler heat addition valves.
Safety alarms include visual and audible notification of alow water temperature, high water temperature, or no flowcondition. Upon activation of any alarm, the LWC hascontacts to send out an emergency shutdown signal. Aremote alarm panel is available for alarm notification at aremote location. The LWC interfaces with Mark IV/AC controlled heat pumpunits for a low cost control system. The Mark IV/AC boardcan receive occupied/unoccupied time clock scheduleoutputs and an emergency shutdown signal (pump restart)from the Mark IV/AC board to energize and override the maincirculating pump, if it is scheduled off, whenever acompressor operates from a call for night setback heat orfrom a call for heating or cooling during the two-hour overridecycle. Simple “daisy chain” wiring is required between MarkIV/AC board terminals. Optional Microtech MonitorTM for Windows Software allowsthe operator to monitor and control setpoints of the LWC atan IBM PC by direct connecting or through a phone line.Includes system graphics.
Additional features include built-in test mode to simulateall control modes, pre-cool cycle to start heat rejection earlierfor undersized boilers, pre-heat cycle to start heat additionearlier for undersized towers, keypad password protection,and holiday schedules.
Mark IV/AC Interface
Mark IV/AC Board TerminalsP = Pump RestartC = CommonU = UnoccupiedE = Unit ShutdownL = Load ShedF = Fault Relay
ThermostatO = 2-Hour OverrideW2 = Night Setback HeatingG = FanW1 = Day HeatingY1 = CoolingR = Power — AC VoltsA = Altitude Fault Signal to LED
O W2 G W1 Y1 R A
F P C U E L F P C U E L
O W2 G W1 Y1 R A
Mark IV/ACBoard
Deluxe AutoChangeover
Wallstat
Deluxe AutoChangeover
Wallstat
PumpRestart
Unocc.Sched.
UnitShut-down
Loop WaterController
PumpRestart
Relay
OptionalPersonalComputer
Heat Pump Supply Loop Temp.
Heat Pump Loop Flow SwitchOutside Air Temp.
Optional Temperature Sensors
Optional Condenser Loop Flow Switch
Optional Condenser Loop Temp.
Heat Pump Loop Pumps
Condenser Loop PumpsHeat Rejection Stages
Modulating Heat Rejection
Heat Addition Stages
Modulating Heat Addition
Additional UnoccupiedSchedules — 6 Total
Pump Restart}Unoccupied
Optional Load Shed Input
Unit Shutdown
INPUTS OUTPUTS
Mark IV/ACBoard
Page 10 / Catalog 1160
MicroTech 2000 water sourceheat pump controller
Each vertical heat pump unit is available with a newMicroTech water source heat pump unit controller. The newcontroller is a microprocessor-based control systempreprogrammed with the software required to monitor andcontrol the unit. The controller enables the mode ofoperation, monitors the water and air temperatures, andcommunicates fault conditions.The controller includespassword protection to protect against unauthorized oraccidental setpoint or parameter changes.
The new MicroTech control system includes unit-mountedreturn air, discharge air and leaving water temperaturesensors; optional tenant setpoint adjustment knob andtenant override button; and the capability of replacing thereturn air sensor with a wall-mounted roorn sensor.
The PC has the ability to communicate with each heatpump unit and the entire system through two dedicatedtwisted conductors. Each controller utilizes LonWorkstechnology, retaining programmable setpoint parametersand control logic. Each controller may operate stand-alone,independent of the network communications and will:
● control heating and cooling from a room sensor● provide fan and compressor operation● monitor all safety controls● monitor discharge air temperature● monitor leaving water temperature● provide status of all vital unit functions● provide optional control outputs
The IBM-compatible MonitorTM software package allowsthe operator to interface with each unit controller into aMicroTech network by using a MicroTech gateway panel.Parameters within each controller are factory set but can bechanged from the PC. All control sequencing, stop/start andsafety monitoring is displayed on the PC screen with thefollowing unique values and parameters for each unit:
● return air and discharge air temperatures● compressor, fan and reversing valve status● high pressure, low temperature, brownout and drain pan
status● occupied and unoccupied heat and cool setpoints● auto/manual and occupied/unoccupied fan control● mode, fault, system, schedule and setpoint operation● compressor starts and fan run hours● load shed level and tenant override
In addition, the following unique operation andmaintenance parameters can be displayed for each unit:
● leaving water temperature● return air temperature setpoint adjustment● adaptive optimal start● occupied/unoccupied (on/cycle) fan mode● room temperature warning● filter changes from fan hours● compressor management: on/off differential, minimum
off time, maximum cycle
An amber, on-board status LED aids ln diagnostics byindicating the water source heat pump operating mode andalarm conditions. If there are no current alarm conditions,the LED will indicate the unit operating mode as shown inthe table below. If there are one or more alarm conditionspresent, the LED will flash in a specific sequence to indicatea particular alamn condition.
New MicroTech WSHP unit controlier LED indication
Status LED State Mode
On continually Occupied, Occupied Load ShedOn 1/2 sec, off 51/2 sec. UnoccupiedOn 51/2 sec., off 1/2 sec. Tenant Override, Overide Load ShedFlashing Alarm Condition
Time schedules can be graphically displayed to showstart/stop times for each day of the week and holidays. Upto 16 holiday dates and duration cycles can be set for atotal of 240 possible holiday dates. Each heat pump can beassigned to a different time schedule and any number ofheat pumps can be assigned to the same time schedule.
Group summary screens are available to display variousparameters for 12 units. Screens are grouped to cover majorgroups such as temperatures, setpoints, and status.
Control and monitoring of the entire water source heatpump system through the MicroTech network includes theMicroTech Loop Water Controller and Application SpecificControllers complete with graphic displays.
Wall-mounted roorn sensors are available to control theheating and cooling operation of each new MicroTech watersource heat pump unit controller. These include a basic roomsensor with LED status, tenant override and optional tenantsetpoint adjustment.
For remote access, a Modem Access Unit allows a remotePC to call the MicroTech network through phone lines aswell as allowing the MicroTech network to dial out topredefined phone numbers.
Catalog 1160 / Page 11
Field installed accessories
Wall mounted thermostats are available for automatic ormanual changeover. All include a fan switch for constant“on” operation or “automatic” for cycle operation with thecompressor. All thermostats are 24 volt type and have dualFahrenheit and Celsius temperature setpoint scales.Thermostat accessories include universal guard, lockingcover and adapter plate to convert from horizontal to verticaljunction box mounting. Individual thermostats include:
• Standard Manual Changeover. Single point lever for one-stage heating and cooling. System “heat-off-cool” switchand fan “on-off” switch.
• Standard Manual and Automatic Changeover. Dualsetpoint levers for one-stage cooling operation. System“off-auto” switch and fan “on-auto” switch. Includes LEDfor “fault.”
• Deluxe Automatic Changeover. Dual setpoint levers forone-stage heating, one-stage cooling, one-stage nightsetback operation. Night setback temperature setpoint is12˚F (-6.6˚C) below daytime heating setting. System “off-auto” switch and fan “on-auto” switch. Includes LED for“fault.”
• Programmable Microelectronic Changeover. Two stageheating, two stage cooling, night setback, night setup andday/night time clock operation. Features include 7-dayprogrammability, four settings per day, keyboard lockcode, time delay and adjustable dead band. System“heat-auto-cool-off” and fan “on-auto” switches.
Supply and return water hoses are available as fire-ratedconstruction in 2 or 3 foot (0.6 or 0.9 m) lengths. Fire-ratedhoses have a synthetic polymer core with an outer ratedcovering of steel. Fittings are steel. Assembly is “fire-rated”and tested according to ASTM-84 81a not to exceed flamespread 25, fuel contribution 25 and smoke density 50.
Each hose has MPT connections. Fire-rated hoses havea swivel connection at one end. Hoses are available in 1/2"(13 mm), 3/4" (19 mm), or 1" (25 mm) to match the FPT fittingson the unit.
Condensate hose is available as a 30" (762 mm) long, clearplastic hose with the necessary clamps and a MPT hosefitting for connection to the FPT field piping.
ManualChangeoverThermostat
AutomaticChangeoverThermostat
ProgrammableThermostat
Combination balancing and shutoff (ball) valves areconstructed of brass and rated at 400 psig (2758 kPa)maximum working pressure. Valves have built-in adjustablememory stop to eliminate rebalancing. Valves have FPTconnections on both ends for connection to the water hoseand to the field piping.
A return air duct collar kit provides a 1" (25 mm) deepcollar for connection of return air ductwork. The kit alsoallows for a 1" (25 mm) or 2" (51 mm) thick filter. The kitconsists of four sheet metal brackets and fasteners. Thebrackets replace the ones shipped with the unit and can befastened to allow for side or bottom filter removal.
To determine unit performance at varying airflow rates, apply the above factors to the tables shown in the catalog supplement.
kW HEAT OFABSORPTION
Catalog 1160 / Page 13
Operating limits
STANDARD EXTENDED RANGEUNITS UNITS
Cooling Heating Cooling Heating Min Ambient Air 50°F 40°F 40°F 40°F Normal Ambient Air 80°F 70°F 80°F 70°F Max Ambient Air 100°F 85°F 100°F 85°F Min Entering Air ➀ ➁ 50°F 50°F 50°F 40°F Normal Ent Air DB/WB 80/67°F 70°F 80/67°F 70°F Max Ent Air DB/WB ➀ ➁ 100/83°F 80°F 100/83°F 80°F
Air limits — °F (English units) EnvironmentThis equipment is designed for indoor installation only.Sheltered locations such as attics, garages, etc., generallywill not provide sufficient protection against extremes intemperature and/or humidity, and equipment performance,reliability, and service life may be adversely affected.
Power supplyA voltage variation of ±10% of nameplate utilization voltageis acceptable. Three-phase system unbalance shall notexceed 2%.
Additional information (initial start-up only)1. Standard units:
Standard conditions are guaranteed to start and operatein an ambient temperature of 40°F (5°C), with entering airat 40°F (5°C), with entering water at 70°F (21°C), with bothair and water at the flow rates used in the ARI Standard320-86 rating test, for initial start-up in winter. Note: Thisis not a normal or continuous operating condition. It isassumed that such a start-up is for the purpose of bringingthe building space up to occupancy temperature.
2. Extended range units:All extended range heat pump conditioners are guaranteedto start and operate in an ambient temperature of 40°F(5°C), with entering air at 40°F (5°C), with entering waterat 70°F (21°C), with both air and water at the flow ratesused in the ARI Standard 320-86 rating test, for initialstart-up in winter.
Note: Voltages listed are to show voltage range. However,units operating with overvoltage and undervoltage forextended periods of time will experience prematurecompontent failure.
Water enthalpy — °F (English units)
Notes:➀ At ARI flow rate➁ Maximum and minimum values may not be combined. If one value
is at maximum or minimum, the other two conditions may not exceedthe normal condition for standard units. Extended range units maycombine any two maximum or minimum conditions, but not morethan two, with all other conditions being normal conditions.
STANDARD EXTENDED RANGEUNITS UNITS
Cooling Heating Cooling Heating Min Ambient Air 10°C 10°C 5°C 5°C Normal Ambient Air 27°C 21°C 27°C 21°C Max Ambient Air 38°C 29°C 38°C 29°C Min Entering Air ➀ ➁ 20°C 10°C 10°C 5°C Normal Ent Air DB/WB 27/19°C 21°C 21°C 21°C Max Ent Air DB/WB ➀ ➁ 38/28°C 27°C 27°C 27°C
Air limits — °C (SI units)
Cooling Heating Cooling Heating Min Ent Water ➀ ➁ 55°F 55°F 40°F 40°F Normal Ent Water 85°F 70°F 85°F 70°F Max Ent Water ➀ ➁ 110°F 90°F 110°F 90°F
Water enthalpy — °C (SI units)
Cooling Heating Cooling Heating Min Ent Water ➀ ➁ 13°C 13°C 5°C 5°C Normal Ent Water 29°C 21°C 29°C 21°C Max Ent Water ➀ ➁ 43°C 32°C 43°C 32°C
40
50
60
70
80
85
90
100
110
Page 14 / Catalog 1160
Extended Range Units Only
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
Capacity data — 60 HertzUnit size 007 at 230 cfm 60 Hz — English units
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesEWT = Entering water temperature, ˚FGPM = Water flow, gallons per minuteWPD = Water pressure drop, ft. of waterEA = Entering air temperature, ˚F (db/wb)LWT = Leaving water temperature, ˚FTOT = Total net cooling and heating capacity, Btu/hrSEN = Sensible cooling capacity, Btu/hrkW = Total unit power input, kWTHR = Total heat of rejection, Btu/hrTHA = Total heat of absorption, Btu/hrLWT = THR 3 (500 2 gpm) + EWTTHA = TOT – (kW 2 3413)
COOLING HEATINGEWT GPM WPD EA LWT TOT SEN kW THR EA TOT kW THA
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
Extended Range Units Only
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
Extended Range Units Only
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
Extended Range Units Only
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
Extended Range Units Only
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
Extended Range Units Only
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
COOLING HEATINGEWT L/s WPD EA LWT TOT SEN kW THR EA TOT kW THA
Extended Range Units Only
List of Abbreviations in Capacity Data TablesL/s = Airflow, liters per secondEWT = Entering water temperature, ˚CL/s = Water flow, liters per secondWPD = Water pressure drop, kilo Pascal (kPa)EA = Entering air temperature, ˚C (db/wb)LWT = Leaving water temperature, ˚CTOT = Total net cooling and heating capacity, WattsSEN = Sensible cooling capacity, WattskW = Total unit power input, kWTHR = Total heat of rejection, WattsTHA = Total heat of absorption, WattsLWT = THR 3 (4180 2 L/s) + EWTTHA = TOT – (kW 2 1000)
*Factory wiredFor wet coil, calculate face velocity (cfm / coil face area, sq ft). Add the following static to the external static pressure for the corresponding face velocity:300 fpm = .05"; 400 fpm = .08"; 450 fpm = .10"; 500 fpm = .12"; 550 fpm = .14". Re-enter table at the increased external static pressure to determine final cfm.
*Factory wiredFor wet coil, calculate face velocity (L/s / coil face area, sq m). Add the following static to the external static pressure for the corresponding face velocity:1.52 m/s = 12.5 Pa; 2.03 m/s = 19.9 Pa; 2.29 m/s = 24.9 Pa; 2.54 m/s = 29.9 Pa; 2.79 m/s = 34.9 Pa. Re-enter table at the increased external static pressureto determine final airflow.
➀ 208-230 volt units are shipped for 208 volt operation. For 230 volt operation, the tap on the 24 volt control transformer must be changed from the208 volt tap to the 230 volt tap.
➁ Maximum time delay (Class RK5) fuse or HACR circuit breaker; value is amps.
Page 38 / Catalog 1160
DIMENSIONS WATERUNIT SIZE A B C D E F CONNS.
in. mm in. mm in. mm in. mm in. mm in. mm (FPT)007 & 009 21 533 21 533 24 610 4.89 124 7.55 192 1.50 38 1/2
Typical Wiring DiagramsMark IV/AC unit wiring diagram, 007 thru 060
>
>
<<
L1 GndCommon
L2
ComprMotor1
30 OL
C S
R
33
12Fan
Motor
32 31
2
Cap
Cap
BL
44
70
CRVR
V
Cof
LTLT
HP
HP
Fan
L1 Com
p
30
46
BR
42
43
Hi Press CondensateSensor
Lo Temp
BR
S
CC - Compressor ContactorCap - Motor Capacitor
BK60
ReversingValve
Solenoid
BK61
Common
OR 240V
24VAC
BKXFORMER
WH 115VRD 208VBR 265V
CircuitBreaker
(optional)
WHBK 007/012
RD 009BR
YE
Mark IV/ACPC
Board
O W2
G W1
Y1
F E L U A P V R C
Page 40 / Catalog 1160
16
17
SCap
Cap
BK YERD BR
RDRD
10
18
23
BKRD 208VBR 265V
OR 240V
BK
Line
24VAC
52
51
Circ
uit
Bre
aker
YEBL
12
L1Com
1810 19
ComprContr
32
29
38
Lo Temp
19
52
51
J2
J1
1
2
1
2
3
4
5
6
7
YE
WH
RD
GN
BL
RedTapeEnd
OR
BK53
5455
56
FanMotor
2021
4
Aux
iliar
y M
odul
e(O
ptio
nal)
Term
inal
Boa
rd #
2
3
2
22
35
BR
3332
3130
29
27
26
2524
CondensateOverflow
37
36
J4 14 13 12 11
Con
den
sate
Lo T
emp
SR
C
Lo T
emp
SIG
Lo P
ress
SIG
Lo P
ress
SR
C
Hi P
ress
SIG
RV
Com
RV
Out
Com
p C
om
Com
p O
ut
Fan
Com
Fan
Out
24VA
C
24V
Gnd
Dis
char
ge A
ir C
om
Dis
char
ge A
ir In
Wat
er O
ut C
om
Rem
ote
DI S
RC
Rem
ote
DI S
IG
Sp
are
Rel
ay N
C
Sp
are
Rel
ay C
om
Sp
are
Rel
ay N
O
RM
Sen
sor
LED
Tena
nt O
verr
ide
RM
Sen
sor
In
RM
Sen
sor
Com
Lon
Talk
Lon
Talk
24VA
C C
omW
ater
Out
In
Aux
Mod
ule
DC
Com
Aux
Mod
ule
DC
+
Aux
Mod
ule
SE
L 2
Aux
Mod
ule
SE
L 1
Aux
Mod
ule
CLK
Aux
Mod
ule
RC
V
Aux
Mod
ule
XM
T
10 9 8 7 6 5 4 3 2 11J5 10 9 8 7 6 5 4 3 2 1 J6
21J1 3 4 5 6 7 8 9 10 11 12
6874
75
76
67
66
65
64
63
62
1 2 3 4 5 6 7
Terminal Board #1
1st Option
3 4
52
1
J2
1
36
69
70
71 (See Note 3)
72 (See Note 3)
E
L
U
P
C73
73
37
34
Fan Relay
DischargeAir
WaterOut
Hi PressRV
Solenoid
BR
C
R
39
Compr
MicroTechController
Optional WiringShielded Cable
Typical MicroTech unit wiring diagram
Catalog 1160 / Page 41
Thermostat Connection Diagrams Mark IV/AC Units – Unit Sizes 007 to 060
Manual changeover thermostat
Standard automatic and manual changeover thermostat
Deluxe automatic changeover thermostat
Non-programmable electronic thermostat
WSHP Mark IV/AC Board Low Voltage Terminal Strip
Thermostat Terminals
P/N 106069001Includes Thermostat and Subbase(Honeywell P/N T834C2416)Fan Switch: Auto / OnSystem Switch: Heat / Off / Cool
WSHP Mark IV/AC Board Low Voltage Terminal Strip
Thermostat Terminals
P/N 105570701Includes Thermostat and Subbase(Honeywell P/N’s T874A1598 andQ674E1460)Fan Switch: Auto / OnSystem Switch: Off / Heat / Auto / Cool
WSHP Mark IV/AC Board Low Voltage Terminal Strip
Thermostat Terminals
P/N 105571003Includes Thermostat and Subbase(Honeywell P/N’s T874C1869 and Q674C1579)Fan Switch: Auto / On / Tenant OverrideSystem Switch: Off / Auto
Note: Thermostat provides a fixed 13°F differential between W1 and W2.
Operation: The units Mark IV/AC boardwill be in the occupied mode, monitoringterminals W1 and Y1 and ignoringterminal W2, when the time clockcontacts are open. The Mark IV/ACboard will be in the unoccupied mode,monitoring terminal W2 and ignoringterminals W1 and Y1, when the timeclock contacts are closed. No cooling isallowed during the unoccupied mode.The tenant override feature of thethermostat allows the occupant to forcea 2-hour override of unoccupied mode.During this override period the W1 andY1 terminals are monitored and the W2terminal is ignored (same as occupied).
WSHP Mark IV/AC Board Low Voltage Terminal Strip
Thermostat Terminals
P/N 105570801Includes Thermostat and Wall Plate(Honeywell P/N T8524D1064)
Page 42 / Catalog 1160
Engineering guide specificationsGeneral — Contractor shall furnish and install water source heat pumps as indicated on plans. Each unit shall be ISO rated andCETL listed. Each unit shall be fully run tested at the factory. Each unit shall be shipped on a wooden skid and covered withcorrugated material.
Casing and Cabinet — The cabinet shall be fabricated from unpainted, heavy-gauge, G-60 galvanized steel. The interior shall beinsulated with 1⁄2" (13 mm) thick, 11⁄2 lb. (1681 g) density coated glass fiber. A full height access panel at the rear of the unit shallprovide access to the fan and compressor sections. A separate front panel shall provide access to the fan motor. A separate frontpanel shall provide access to the compressor section and control box. A panel below the coil shall provide access to the evaporatorsection. Unit shall have an insulated panel and drain pan separating the fan compartment from the compressor compartment. Unitshall have a factory installed 1" (25 mm) thick filter bracket for side filter removal. Unit shall have a 1" (25 mm) thick throwaway filter.Unit shall have a galvanized steel drain pan with 7/8" (22 mm) O.D. drain connection extending through the unit casing. Cabinet shallhave separate holes and knockouts for entrance of line voltage and low voltage control wiring. Supply and return water connectionsshall be copper FPT fittings and shall protrude through the cabinet for connection to a flexible hose.
Refrigerant Circuit — Each unit shall have a sealed refrigerant circuit including a hermetic compressor, capillary expansion tube(s),finned tube heat exchanger, reversing valve, water-to-refrigerant coaxial heat exchanger, safety controls, and both high and lowrefrigerant service valves.
Compressor shall be hermetic type with external vibration isolator mounts and thermal overload protection. The finned tube coilshall be constructed of aluminum fins bonded to copper tubes. The coaxial heat exchanger shall be constructed of a copper innertube and a steel outer tube and be U.L. listed. The heat exchanger shall be rated for 400 psig (2760 kPa) on the water side and 450psig (3103 kPa) on the refrigerant side.
Safety controls shall include a low suction temperature (freezestat) switch and a high refrigerant pressure switch to lock outcompressor operation. Units four tons and above shall have a low refrigerant pressure switch for loss of charge protection. A lowpressure switch shall not be permitted to replace a low suction temperature switch for freeze protection. Units shall be capable ofbeing reset only by interrupting the power supply to the unit. Unit shall not be able to be reset from the wall thermostat.
Unit shall be capable of starting in an ambient temperature of 40°F (5°C) with entering water at 70°F (21°C) with both air and waterflow rates at the ARI rating conditions.
Electrical — A control box shall be located within the unit and shall contain controls for compressor, reversing valve and fan motoroperation and shall have a 50 VA transformer and a terminal block for low voltage field wiring connections. The control box shall bemovable without access to the side of the unit.
Unit shall be namplated to accept time delay fuses or HACR circuit breaker for branch overcurrent protection of the power source.Unit control system shall provide heating or cooling as required by the setpoints of the wall thermostat. The unit control scheme
shall provide for fan operation simultaneous with compressor operation (fan interlock) regardless of the thermostat type. The unitshall be capable of providing an output signal to an LED on the thermostat or to a central monitoring panel to indicate a “fault”condition from the activation of any one of the safety switches.
Fan and Motor Assembly — Unit shall have a direct drive centrifugal fan. The fan housing shall have a removable orifice ring tofacilitate fan motor and fan wheel removal. The fan housing shall protrude through the cabinet to facilitate field duct connection. Thefan motor shall be a multispeed, PSC type with integral mounting bracket isolated from the fan housing and thermal overloadprotection. Units above one ton shall have a separate fan access panel for fan operation during compressor operation checkout.
Mark IV/AC Control System — Unit shall have a microprocessor-based control system. The unit control logic shall provide heatingand cooling operation as required by the setpoints on the wall thermostat. The control system shall provide the following:1. The use of standard mercury bulb type wall thermostats.2. Fan operation simultaneous with the compressor (fan interlock) regardless of thermostat logic.3. Time delay compressor operation.4. Delayed de-energization of the reversing valve or quiet reversing valve operation.5. Compressor short cycle protection for a minimum of three minutes before restart is possible.6. Random unit start-up after coming off an unoccupied mode.7. Single grounded wire connection for activation of the unoccupied, load shed or emergency shutdown modes.8. Night setback temperature setpoint input signal from the wall thermostat.9. Override signal from wall thermostat to override unoccupied mode for two hours.
10. Brownout protection to suspend unit operation if the supply voltage drops below 80% of nominal.11. Condensate overflow protection to suspend cooling operation in an event of a full drain pan.12. Suspended compressor operation upon activation of the refrigerant pressure switch(es).13. Cooling operation for 60 seconds upon activation of the low suction temperature (freezestat) switch - defrost cycle.14. Method of defeating compressor, reversing valve and fan time delays for fast service diagnostics.
Optional MicroTech Control System — Unit shall have a preprogrammed, pretested, microprocessor-based control system.The unit control logic shall provide control of unit heating and cooling functions in response to a wall mounted comfort sensor.The control system shall provide the following:1. Monitoring of safety controls in each heat pump and appropriate responses.2. Monitoring of discharge air temperature and leaving water temperature at each heat pump.3. Fan, reversing valve, and compressor operation.4. Control outputs for boilerless system electric heat, motorized valves, fresh air damper and other auxiliary equipment.5. Operation status of all vital unit functions.6. Optional night setback override for tenant comfort.7. RS-232 interface for direct interface using a portable IBM-compatible computer.
Catalog 1160 / Page 43
Optional Extended Range Unit — Unit shall be capable of heating operation at 40°F (5°C) minimum entering water temperatureand 40°F(5°C) minimum entering air temperature. Unit shall have a suction line accumulator, insulated coaxial heat exchanger,insulated refrigerant tubing, and a compressor crankcase heater.
Field Installed Accessories
Thermostats (choose one of the following wall thermostats):
M Manual changeover wall thermostat for one-stage heating and cooling operation. Subbase shall have system “heat-off-cool” andfan “on-auto” switches.
M Automatic changeover wall thermostat for one-stage heating and one-stage cooling operation. Subbase shall have system “off-auto”and fan “on-auto” switches with LED for “fault.”
M Automatic and manual changeover wall thermostat for one-stage heating and one-stage cooling operation. Subbase shall havesystem “off-auto” and fan “on-auto” switches with LED for “fault.”
M Programmable microelectronic wall thermostat for one- or two-stage heating, one- or two-stage cooling, night setup, nightsetback and day/night time clock operation. The thermostat shall have system “on-off,” temperature “heat-auto-cool” and fan“on-auto” switches.
Flexible Hoses — Two fire-rated flexible hoses with ASTM ratings of Flame Spread 25, Fuel Contribution 25 and Smoke Density 50for connection to unit and field piping. Hose shall be covered with braided steel.
Valves — Two combination balancing and shutoff valves with adjustable memory stop.
Optional Duct Collar/Filter Rack — Return air duct collar/ 2" (51 mm) filter rack to accept a return air duct connection and a 1"(25 mm) or 2" (51 mm) thick filter. The side bracket shall allow for side or bottom filter removal without removing the ductwork.
Field Installed Controls for Mark IV/AC Control Units — Boilerless system kit locks out compressor operation if the entering waterfalls below the adjustable setpoint. In addition, the control shall provide a contact signal to control a field installed electric heaterdownstream of the heat pump unit. An emergency heat switch shall be provided.
Field Installed Controls — Motorized valve relay and control valve. The assembly shall include a relay, valve and wire harness. Thevalve shall open when the compressor is on and close when the compressor is off.
Multiple unit control panel allows a single thermostat to control up to three units in parallel.Auxiliary relay controls optional devices when the fan is operating. The relay shall have SPDT contacts.
0ptional Water ReguIating Valvet — Unit shall have a factory mounted refrigerant connection. The valve requires field installationto the leaving water line. The valve shall open when the compressor is on and shall close when the compressor is off. During theon-cycle, the valve shall modulate the water flow to maintain correct system refrigerant pressures.
AAF-McQuay Incorporated4900 Technology Park Boulevard, Auburn, NY 13201-9030 USA, (315) 253-2771