Supplemental Installation Instructions...have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local

EnergyXR SystemFactory Installed Energy Recovery48/50HC WeatherMasterr Commercial Rooftop Units15 to 25 Nominal Tonswith Puronr (R---410A) Refrigerantand ComfortLINK Controls

Supplemental Installation Instructions

This document is a supplemental installation instruction for the EnergyX factoryinstalled Energy Recovery Ventilator. It is to be used with the base HC 15 to 25 Ton

rooftop unit Installation Instructions and ComfortLINK Controls Manual.

NOTE: Read the entire instruction manual before startingthe installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 2. . . . . . . . . . . . . . . . . . . .

GENERAL 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Roofcurb 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vertical Airflow Configurations 6. . . . . . . . . . . . . . .

Horizontal Airflow Applications 6. . . . . . . . . . . . . .

Install Iso--Exhaust Accessory Hood (if applicable) 6. . .

Install Accessory Exhaust Damper (if applicable) 6. .

Rig and Place Unit on Curb 6. . . . . . . . . . . . . . . . . . . .

Install Hold Down Brackets 6. . . . . . . . . . . . . . . . . .

Positioning 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Make Electrical Connections 9. . . . . . . . . . . . . . . . . . .

Main Power 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Power 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Base Unit Components 9. . . . . . . . . . . . . . . . . . . . . . .

START UP 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start--Up Check List 9. . . . . . . . . . . . . . . . . . . . . . . . . .

Base Unit Evaporator Fan 9. . . . . . . . . . . . . . . . . . . . .

ERV Test Mode 9. . . . . . . . . . . . . . . . . . . . . . . . . . . .

ERV Configuration 10. . . . . . . . . . . . . . . . . . . . . . . .

ERV with Economizer Additional Configurations 10. . .

Adjusting ERV Options 10. . . . . . . . . . . . . . . . . . . . . .

OPERATING SEQUENCE 11. . . . . . . . . . . . . . . . . . . . . .

General 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Communications 11. . . . . . . . . . . . . . . . . . . . . . . . . . .

15--25 Ton Modulating ERV 15. . . . . . . . . . . . . . . . . . . .

Occupancy 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modes of Operation 16. . . . . . . . . . . . . . . . . . . . . . . . .

Off Mode (OA.OP = 0) 16. . . . . . . . . . . . . . . . . . . . .

Test Mode (OA.OP = 5) 16. . . . . . . . . . . . . . . . . . . .

Free Cooling Mode (OA.OP = 3) 16. . . . . . . . . . . . .

Defrost Mode (OA.OP = 4) 16. . . . . . . . . . . . . . . . .

ERV (DCV) Mode (OA.OP = 1) 16. . . . . . . . . . . . . .

OA Tempering Mode (OA.OP = 3) 17. . . . . . . . . . .

Exhaust Control 17. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wheel Stop/Jog 18. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Points 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING 18. . . . . . . . . . . . . . . . . . . . . . . . .

Complete ERV Stoppage 18. . . . . . . . . . . . . . . . . . . . . .

Check Alarms 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T418 OAU Dirty Filter 18. . . . . . . . . . . . . . . . . . . . . .

T418 OAU Motor Failure 18. . . . . . . . . . . . . . . . . . . .

T418 OAU Low CFM 19. . . . . . . . . . . . . . . . . . . . . . .

T418 OAU General Alarm 19. . . . . . . . . . . . . . . . . . . .

Check Diagnostic LEDs 19. . . . . . . . . . . . . . . . . . . . . . .

Communications Failures 19. . . . . . . . . . . . . . . . . . . . . .

Comm Failure1 -- UPC to LEN Fail 19. . . . . . . . . . .

Comm Failure2 -- UPC to EXCB Fail 19. . . . . . . . .

On--board Pressure Transducers 19. . . . . . . . . . . . . . . . .

MAJOR SYSTEM COMPONENTS 20. . . . . . . . . . . . . . .

EnergyX Control Board (EXCB) 23. . . . . . . . . . . . . . .

Universal Protocol Converter (UPC) 25. . . . . . . . . . . .

User Interface 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LCD Texts 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enthalpy Wheel 26. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modulating Fan 26. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modulating Outside Air Damper 26. . . . . . . . . . . . . . .

2

Options and Accessories 26. . . . . . . . . . . . . . . . . . . . . . .

Economizer Damper (field install only) 26. . . . . . . . .

Frost Protection (field install only) 26. . . . . . . . . . . . .

Wheel Motor Status (field install only) 26. . . . . . . . . .

Filter Maintenance (field install only) 26. . . . . . . . . . .

Horizontal Transition Curb (field install only) 27. . . .

SERVICE & MAINTENANCE 27. . . . . . . . . . . . . . . . . .

Cleaning 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wheel and Segment Cleaning 27. . . . . . . . . . . . . . . . .

Filters 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Outdoor--Air Inlet Screens 27. . . . . . . . . . . . . . . . . . . .

Lubrication 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wheel Drive Adjustment 27. . . . . . . . . . . . . . . . . . . . . .

Wheel Air Seal Adjustment 27. . . . . . . . . . . . . . . . . . . .

Wheel and Segment Removal/Installation 28. . . . . . . . .

Wheel Segment Removal/Installation 28. . . . . . . . . . .

Whole Wheel Removal/Installation(36”& 46” wheels) 29. . . . . . . . . . . . . . . . . . . . . . . . . .

Outside Air and Exhaust Hood Removal 29. . . . . . . . . .

Outside Air Hood Removal 29. . . . . . . . . . . . . . . . . . .

Exhaust Air Hood Removal 29. . . . . . . . . . . . . . . . . . .

Outside Air Motorized Damper Removal 31. . . . . . . . .

Outside Air and Exhaust Fan Replacement 31. . . . . . . .

Outside Air Fan Removal 31. . . . . . . . . . . . . . . . . . . .

Exhaust Fan Removal 33. . . . . . . . . . . . . . . . . . . . . . .

APPENDIX 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix A — Certified Dimension Drawings 36. . . . .

Appendix B — Exhaust Fan Performance 52. . . . . . . . .

EnergyX Modulating Volume 15--25 Ton Units 52. . .

Appendix C — Electrical Data 54. . . . . . . . . . . . . . . . . .

48HC -- with ERV:Unit Wire/Fuse or HACR Breaker Sizing Data 54. . . .

50HC -- with Electric Heat and ERV:Unit Wire/Fuse or HACR Breaker Sizing Data 56. . . .

ENERGYX UNIT START--UP CHECKLIST 61. . . . . . .

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electricalshock or other conditions which may cause personal injuryor property damage. Consult a qualified installer, serviceagency, or your distributor or branch for information orassistance. The qualified installer or agency must usefactory--authorized kits or accessories when modifying thisproduct. Refer to the individual instructions packaged withthe kits or accessories when installing.

Follow all safety codes. Wear safety glasses and workgloves. Use quenching cloths for brazing operations andhave a fire extinguisher available. Read these instructionsthoroughly and follow all warnings or cautions attached tothe unit. Consult local building codes and appropriatenational electrical codes (in USA, ANSI/NFPA70,National Electrical Code (NEC); in Canada, CSA C22.1)for special requirements.

It is important to recognize safety information. This is the

safety--alert symbol . When you see this symbol on theunit and in instructions or manuals, be alert to thepotential for personal injury.

Understand the signal words DANGER, WARNING,CAUTION, and NOTE. These words are used with thesafety--alert symbol.

DANGER identifies the most serious hazards which willresult in severe personal injury or death. WARNINGsignifies hazards which could result in personal injury ordeath.

CAUTION is used to identify unsafe practices, whichmay result in minor personal injury or product andproperty damage.

NOTE is used to highlight suggestions which will result inenhanced installation, reliability, or operation.

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3

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personalinjury or death.

Before performing service or maintenance operationson unit, always turn off main power switch to unit andinstall lock(s) and lockout tag(s). Unit may have morethan one power switch. Ensure electrical service torooftop unit agrees with voltage an amperage listed onthe unit rating plate.

! WARNING

UNIT DAMAGE HAZARD

Failure to follow this caution may cause equipmentdamage.

This unit uses a microprocessor--based electroniccontrol system. Do not use jumpers or other tools toshort out components or to bypass or otherwise departfrom recommended procedures. Any short--to--groundof the control board or accompanying wiring maydestroy the electronic modules or electricalcomponents.

CAUTION!

CUT HAZARD

Failure to follow this caution may result in personalinjury.

Sheet metal parts may have sharp edges or burrs. Usecare and wear appropriate protective clothing, safetyglasses and gloves when handling parts and servicingair conditioning equipment.

CAUTION!

GENERAL

This publication contains Installation, Start--Up, Controls,Operation, Troubleshooting and Service information forthe EnergyX Energy Recovery System, factory installedon a 48/50HC (15 to 25 nominal ton) rooftop unit. Thisdocument is a supplemental installation instruction and isto be used in conjunction with the base rooftop unitInstallation Instructions and the ComfortLINK Controls,Start--Up, Operation and Troubleshooting Instructions.

The EnergyX Energy Recovery system is designed topre--condition the outside air prior to it entering therooftop unit evaporator using building exhaust air as aheat sink / source. The EnergyX system provides latentand sensible energy exchange between the outsideventilation air and the building exhaust air. Thispreconditioning of air allows higher operatingefficiencies, increased comfort control, potentialdownsizing of the base rooftop unit while still meeting theASHRAE ventilation requirements. Operational costsavings are realized by the high efficiency EnergyRecovery device meeting the cooling and heating call fora larger portion of the operating cycle than just a normaldamper or economizer device. This is demonstrated by theEnergyX AHRI Guideline--V Combined Efficiency Factor.

EnergyX HC17--28 units are shipped in the vertical supplyand return duct configurations only. A field installedhorizontal curb adapter kit is available for horizontalreturn and supply configuration.

The EnergyX Energy Recovery Wheel is rated inaccordance with AHRI 1060 and is ETL certified.

See Table 1 for Physical Data.

EnergyX

4

Table 1 – Physical Data

Model 48/50HC 15 -17.5 Ton

EnergyX Size NON ECONO CFM ECONO CFM

EnergyX Unit Type Modulating Air Flow Capability

ERV WHEEL OA (CFM) Range 682---3675

ERV WHEEL EA (CFM) Range 682---3675

MAX ECONOMIZER OA (CFM)N/A

6000-7000

MAX ECONOMIZER EA (CFM) 6000-7000

ENERGY RECOVERY WHEEL

TYPE Enthalpy Lightweight Polymer with Silica Gel Desiccant Coating

MODEL (AirXchange) ERC-3628

SIZE (Dia. X Depth) (in.) 36--- in x 3--- in

NOMINAL DRIVE MOTOR HP 1/20

SUPPLY FAN #1

QTY - TYPE 1 - Backward Curved

DRIVE TYPE Direct

BLOWER SIZE (DIAMETER) 15.75--- in

NOMINAL MOTOR HP 1.2

SUPPLY FAN #2


DRIVE TYPE Direct

BLOWER SIZE 15.75--- in


EXHAUST FAN #1


DRIVE TYPE Direct



EXHAUST FAN #2


DRIVE TYPE Direct



FILTERS

TYPE 2-in. Pleated, 30% Efficiency

SUPPLY AIR (QTY) - SIZE (2) 20--- in x 16--- in x 2--- in

EXHAUST AIR (QTY) - SIZE (2) 20--- in x 16--- in x 2--- in

TYPE Aluminum Water Filter

Water Entrapment (QTY) - SIZE (2) 34.375--- in x 17.25--- in x 1--- in

EnergyX

5

Table 1 -- Physical Data (cont)

Model 48/50HC 20 - 25 Ton

EnergyX Size NON ECONO CFM ECONO CFM

EnergyX Unit Type Modulating Air Flow Capability

ERV WHEEL OA (CFM) Range 1076---6000

ERV WHEEL EA (CFM) Range 1076---6000

MAX ECONOMIZER OA (CFM)NA

8000-10000

MAX ECONOMIZER EA (CFM) 8000-10000

ENERGY RECOVERY WHEEL

TYPE Enthalpy Lightweight Polymer with Silica Gel Desiccant Coating

MODEL (AirXchange) ERC-4646C

SIZE (Dia. X Depth) (in.) 46--- in x 3--- in

NOMINAL DRIVE MOTOR HP 1/6

SUPPLY FAN #1


DRIVE TYPE Direct

BLOWER SIZE (DIAMETER) 19.68--- in


SUPPLY FAN #2


DRIVE TYPE Direct



EXHAUST FAN #1


DRIVE TYPE Direct



EXHAUST FAN #2


DRIVE TYPE Direct



FILTERS

TYPE 2-in. Pleated, 30% Efficiency

SUPPLY AIR (QTY) - SIZE (2) 16--- in x 25--- in x 2--- in

EXHAUST AIR (QTY) - SIZE (2) 16--- in x 25--- in x 2--- in

TYPE Aluminum Water Filter

Water Entrapment (QTY) - SIZE (2) 34.375--- in x 24.5--- in x 1--- inEnergyX

6

INSTALLATION

An EnergyX unit is installed as a single piece unit. Toinstall an EnergyX unit, follow the base rooftop unitinstallation instructions with the following exceptions andadditions:

Install Roofcurb

Vertical Airflow Configurations —

The EnergyX unit uses the standard HC base unitroofcurb. No extra curb support rails or extensions arerequired. See the unit nameplate for model numberdesignation. Refer to the base rooftop installation manualand “Install Hold Down Brackets” below for roofcurbinstructions. Ductwork must be attached to the curb.

Horizontal Airflow Applications —

EnergyX units with a horizontal return and supply airconfiguration require a field installed horizontal curbadapter kit. Refer to the base rooftop installation manualand the horizontal curb adaptor kit manual for roofcurbinstructions.

Install Iso--Exhaust Accessory Hood (if applicable) —

If an exhaust isolation hood has been ordered as anaccessory to isolate return air that must be exhausted (e.g.bathroom exhaust), install it in the return air portion of theroof curb prior to setting the rooftop unit. The iso--exhausthood should face with the opening out and the angledhood portion facing the interior of the curb. Refer to theaccessory installation instructions for further guidance.

Install Accessory Exhaust Damper (if applicable) —

See Two Position Exhaust Damper Accessory InstallationInstructions (Catalog # IIK--CREXDPR0304--01 or later)for details.

Rig and Place Unit on Curb

Inspect the EnergyX system for damage. File a claim withthe shipping company if shipment is incomplete ordamaged.

Install Hold Down Brackets —

Units are shipped with hold down brackets for securingthe base unit with the ERV option to the roof curb. Installand secure the brackets as shown in Fig. 1.

NOTE: Hold down brackets must be affixed to the curband rooftop unit prior to removing rigging support.

See the rigging label on the exterior of the base unit andFig. 2. This label is provided for guidance purposesONLY. The unit’s actual weight and center of gravity willvary based on the specific combination of factory optionsincluded with the unit. Use prudent judgment whenrigging and lifting the unit to account for weight variancesand make adjustments for the actual center of gravity asnecessary.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipmentdamage.

All panels must be in place when rigging. Unit is notdesigned for handling by fork truck.

CAUTION!

SUPPLYAIR

RETURNAIR

C11460

Fig. 1 -- MRT ERV Hold Down Brackets —Location and Installation (48HC*17 shown)

EnergyX

7

50HE502615 C

MAX. WEIGHTPOIDS MAXIMUM A B C

LBLIVRES

KGKG

INPO

MMMM

INPO

MMMM

INPO

MMMM

UNIT

48HC17 WITH ERV48HC20 WITH ERV48HC24 WITH ERV48HC28 WITH ERV50HC17 WITH ERV50HC20 WITH ERV50HC24 WITH ERV50HC28 WITH ERV

36943904425943043567377741324177

16791775193619561621171718781899

127.8141.5141.5157.8127.8141.5141.5157.8

32493595359540073249359535954007

89.792.498.9

105.089.793.293.2

105.8

22772348251226672277236923682688

52.352.360.360.352.352.360.360.3

13281328153215321328132815321532

DETAIL "A"DÉTAIL «A «

SEE DETAIL "A"VOIR DÉTAIL «A «

DUCT ENDPASSAGES CONDUITES

PLACE ALL SEAL STRIPS IN PLACEBEFORE PLACING UNIT ON ROOF CURB

INSTALLER TOUTES LES BANDSD’ISOLATION EN PLACE AVANT DE

PLACER L’APPAREIL SUR LE REBORDDE TOIT.

"A"

"C"

"B"

1676(66")

MINIMUM

CAUTION - NOTICE TO RIGGERS:AVERTISSEMENT - REMARQUE ÀL’ATTENTION DES MONTEURS

UNIT IS NOT TO BE RIGGED WITH CHAINS THROUGH BASE RAIL HOLES.NE PAS PASSÉ LES CHAINES AU TRAVERS LES TROUS DU GLISSIÈRE DE BASE POUR GRÉE L'UNITÉ

ALL PANELS MUST BE IN PLACE WHEN RIGGING.TOUS LES CAPOTS DOIVENT ÊTRE EN PLACE AVANT LE LEVAGE

• Hook rigging shackles through holes in base rail, as shown in detail “A”.• Holes in base rails are centered around the unit center of gravity.• Use wooden top skid, when rigging, to prevent rigging straps from damaging unit.

• Accrocher les manilles des élingues de levages dans les trous situés dans le rail de base comme indiqué au détail « A ».• Les trous pratiqués dans le rail de base sont centrés autour de centre de gravité de l’appareil.• Utiliser des cales en bois lors du levage pour éviter que les élingues n’endommagent le haut de l’appareil.

C11415

Fig. 2 -- Rigging Label, 48--50HC Size 17--28 Units With ERV

Positioning

Maintain unit clearances as listed as shown in Fig. 3 and 4for minimum distance from combustible materials, properairflow, and service access. Follow all local codes for properclearances – the local code requirements take precedenceover any clearance listed in this document. Contact yourlocal Carrier representative for clearance obstructions andany potential resulting affect on unit warranty.

Follow all other curb, rigging, and positioning installationguidance in base rooftop unit installation instructions.

NOTE: Install Fan and Filter Status accessories at thispoint. Refer to the accessories Installation Instructions fordetails.

EnergyX

8

36 in[914 mm]

36 in[914 mm]

75 in[1893 mm]

42 in[1067 mm]

60 in[1524 mm]

36 in[914 mm]

42 in[1067 mm]

C11461

Fig. 3 -- Clearances for ERV on Size 17 & 20 HC Base Units

51 in[1295 mm]

36 in[914 mm]

75 in[1893 mm]

36 in[914 mm]

60 in[1524 mm]

36 in[914 mm]

42 in[1067 mm]

C11462

Fig. 4 -- Clearances for ERV on Size 24 & 28 HC Base Unit

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Make Electrical Connections

See the base unit name plate for the ETL certifiedsinglepoint electrical values and component electricalinformation. See the base unit and EnergyX access doorsfor the electrical wiring diagrams specific to each section.

Main Power —

Follow all base unit installation instructions, usingelectrical values shown on unit nameplate; only one mainpower supply is required The EnergyX base rooftop unitand energy recovery module is ETL listed as a singlepoint power supply only.

On some voltage ERV’s, there is a step down transformerthat is factory supplied to power components that are notline side voltage. Field wiring or alteration of thesecomponents is neither required nor desired.

UNIT DAMAGE HAZARD


Some electric heat modules require a dual--pointelectrical service connection independent from allother electrical circuits in the unit. Consult the unitinstallation instructions, unit wiring diagrams and/orelectric heater installation instructions for verification.

CAUTION!

Control Power —

Follow all base unit installation instructions for lowvoltage wiring. The ERV control board is factory wiredinto the base unit communications via the protocolconverter module. See Fig. 7. All external control wiresstill connect to the RTU terminal strip as in the base unitinstallation instructions.

EnergyX modulating units can be equipped with anoptional CO2 sensor for Demand Control Ventilation. Ifthe optional CO2 sensor is used, install and connect thesensor to the base unit ComfortLINK controller per CO2sensor installation instructions. See the base unitComfortLINK controls manual and the Configurationsection of this manual for specific CO2 sensorconfigurations.

Base Unit Components

Follow the base unit installation instructions to install allother base unit components, including (but not limited to)flue hoods, condensate trap and other accessory devices.

START UP

The EnergyX unit is operated in coordination with thebase rooftop unit. Follow the base unit instructions andControls book for proper start--up with addition of thefollowing:

Start--Up Check List

Use the EnergyX Start--Up checklist (see page 61) inconjunction with the base unit Start--Up checklist from thebase Controls book. Fill in all blank data entries that areapplicable to the exact unit being installed. The ERVmodel and serial numbers are printed in the ERV controlbox. Save the checklist for future service and maintenanceuse. It is recommended that a copy of the checklist be leftwith the unit in the literature slot on the base unit controlbox access door.

Base Unit Evaporator Fan

First follow the base unit instructions to balance the RTUindoor fan. The ERV fans should be off during base unitfan set--up. Before start--up and testing the ERV, verifythat the ComfortLINK minimum damper positions are setto 0 and if not change them to 0. Configuration →AIR.Q→AQ.MN = 0, and Configuration →ECON →MP.MX= 0. The ERVs communicate with ComfortLINK thereforethe scrolling marquee can be used for test mode andconfiguration of the ERV. The following sections explainERV testing and configuration. It is important that theseconfigurations are set correctly in order for the ERVmodule to properly control the air performance. Finally,with service test disabled run unit under normal operation,verify proper supply airflow with ERV and indoor fanrunning.

ERV Test Mode —

ERV Test points should be used when starting up anEnergyX unit to verify proper ERV component operation.It can also be used for troubleshooting. To test the ERV,use the Scrolling Marquee to put the ComfortLINK RTUinto test mode. Then go to Test Independent outputs(Service Test →INDP). Table 2 shows a list of test pointsthat can be tested as independent outputs. There are fiveERV tests which can be performed separately or togetherwhile in test mode. Use the scrolling marquee to changethe value of the test point. Follow the ComfortLINKControls, Start--Up, Operation, and Troubleshootingmanual for testing the base rooftop unit.

The 5 ERV specific test points are OAU 2--positionDamper, OAU Wheel Test, OAU OA Fan Speed test,OAU PE Fan Speed Test and OAU Tempering HeaterTest. The 2 position damper can be opened and closedwith the OA.DM point. The 2--position damper accessorycan be installed on the exhaust opening of the ERV. TheERV wheel motor can be turned on and off with the WHLpoint. The ERV’s outside air (OA.OF) and buildingexhaust air (OA.XF) motors can be ramped up and downduring test mode with their corresponding fan speed testpoints. Table 2 shows the test mode test points in the orderthey appear under test mode. Communication failures willno allow these ERV test points to be changed.ComfortLINK will show active alarms during test mode.

NOTE: If a 2 position damper is installed, it must beopened in test mode while operating the exhaust test.

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10

Table 2 – Service Test Mode Independent Test Points

ITEM EXPANSION RANGE

INDP Test Independent Outputs

ECON Economizer Position Test 0 to 100

E.CAL Calibrate Economizer Off/On

PE.1 Power Exhaust 1 Test Off/On

PE.2 Power Exhaust 2 Test Off/On

ALRM Alarm Relay Test Off/On

CCH Crankcase Heat Test Off/On

OA.DM OAU 2---position Damper Close/Open

WHL OAU Wheel Test 0 to 100

OA.OF OAU OA Fan Speed Test 0 to 100

OA.XF OAU PE Fan Speed Test 0 to 100

OA.HT OAU Tempring Heater Test 0 to 100

ERV Configuration —

The ERV configuration menu can be accessed using theScrolling Marquee. Enter the Outside Air UnitConfigurations (Configuration →OAU) menu. Table 5shows the list of complete outside air unit configurationsthat can be changed and the defaults from the factory. Thecritical job specific configurations are listed below andshould be changed at start up for the specific job site. Seethe operation section for details all configurations.

OAU Unoccupied Operation (U.RUN) — This allows theERV to run during the unoccupied period when therooftop fan is brought on.

Min DCV Outside Air CFM (DCV.M) — This sets thelowest setting for ventilation using outside air. Thisnumber sets the absolute minimum for ventilation ofcontaminants and CO2 generated by sources other thanpeople. This is only accessible if CO2 sensors are installedand ComfortLINK is configured properly.

NOTE: ERV must be equipped with optional economizerto operate with CO2 sensors.

Minimum Outside Air CFM (OA.MN) — This sets theoutside air ventilation rate when not using a CO2 sensor toremove contaminants and CO2 generated by all sources inthe building space. When using CO2 sensors and runningDCV, this sets the maximum amount of outside airallowed for ventilation.

Power Exhaust CFM Offset (PE.OF) — This sets theoffset for exhausting building air based on outside airbeing brought in. A negative setting causes a positivebuilding pressure, and a positive setting causes a negativebuild pressure.

ERV with Economizer Additional Configurations

There are seven important ComfortLINK configurations thatimpact the ERV operation when equipped with optionaleconomizer. To change these configuration use theComfortLINK Scrolling Marquee, Navigator, or a CCNcommunication tool. Refer to the base unit Controls,Start--up, Operation, and Troubleshooting manual for moreinformation on using these tools. Table 3 shows theseComfortLINK points that impact ERV operation, with briefdescriptions. These points can be found on the ScrollingMarquee under the economizer and air quality configurationmenus (Configuration → ECON and Configuration →AIR.Q). See operation section for details on individualconfigurations.

Adjusting ERV Options

The ERV can come with factory installed frost protectionand/or an economizer (wheel bypass) damper. Otheraccessories can be added to the ERV in the field includingbut not limited to filter status, wheel status, and buildingpressure control. Refer to the major components section ofthis manual or the specific accessory literature for moredetail on these.

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11

Table 3 – ComfortLINK Configurations

DISPLAYITEM EXPANDED TEXT DEFAULT RANGE DESCRIPTION

EC.EN Economizer Installed No: no FIOPYes: FIOP

Yes/No This tells the ERV that an optionaleconomizer is installed

MP.MX Econo Min at Max Fanspeed 0 0 to 100% Must be set to 0 so the base rooftop doesnot use the economizer for ventilation, onlyfree coolingAQ.MN Econo Min IAQ Position 0 0 to 100%

IA.CF IAQ Analog Input Config 0: no FIOP1: FIOP

0=No IAQ1=DCV2=Override3=Ctl Min Pos

This tells the ERV if a CO2 sensor isinstalled

IA.FN IAQ Analog Fan Config 0 0=Never1=Occupied2=Always

Tells the ERV if it can run duringunoccupied for high CO2 sensor

II.CF IAQ Switch Input Config 0 0=No IAQ1=DCV N/O2=DCV N/C3=Override N/O4=Override N/c

This tells the ERV if a switch is installed forCO2

II.FN IAQ Switch Fan Config 0 0=Never1=Occupied2=Always

Tells the ERV if it can run duringunoccupied for high CO2 switch

AQD.L AQ Differential Low 100 0 to 5000 These set the indoor air quality (IAQ) CO2DCV operating range. Differential is basedoff a 400PPM outside CO2 value.AQD.H AQ Differential High 700 0 to 5000

OVR.P IAQ Override Position 100% 0---100% Sets the speed fo the outside air fan duringoverride.

OPERATING SEQUENCE

General

An EnergyX unit is a 48/50HC rooftop unit and energyrecovery ventilator (ERV). It operates the ERV module inan integrated manner with the base rooftop unit. The baserooftop unit functions per the base unit sequence ofoperation, for information regarding ComfortLINKcontroller operation see the base rooftop unit Controls,Start--Up, Operations, and Troubleshooting manual. TheERV will operate based on communication from theComfortLINK controller. The following section discussesthe ERV operation in detail. In summary, the ERVoperates to provide pre--conditioned outside air forventilation requirements. If equipped with an optionaleconomizer the ERV can provide free cooling when theoutside air conditions are satisfactory.

In general the ERV monitors occupancy and indoor fanstate of the base unit to determine when to activate. Theoutside air fan(s) bring in the outside air pass it throughthe enthalpy wheel and into the rooftop mixing box. Thebuilding return air is pulled through the enthalpy wheel bythe exhaust fan(s) and released outside. During operationthe enthalpy wheel is rotating to use the building air topre--condition the outside air. When free cooling is desiredand allowed the wheel is not needed to pre--condition theair therefore an economizer damper (wheel bypass) isused to bring in the outside air directly to the mixing box.

Communication

The ERV relies on communication with ComfortLINK tooperate. The ERV monitors ComfortLINK points todetermine operation. The ERV writes to points inComfortLINK to provide the user with its running status.If communication is lost the ERV will shut down andremain in the Off mode until communication isestablished. Refer to the troubleshooting section fordetails on communication failures. Table 4 shows theComfortLINK points that the ERV monitors for operationand a brief description of their functions. Table 5 showsthe ComfortLINK points that the ERV uses for itsconfigurations and a brief description of each. Table 6shows the ComfortLINK points that the ERV writes tobased on its running status.

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Table 4 – Inputs -- Points the ERV Reads from ComfortLINK

CCN Point MarqueePoint Expanded Text Range Units Default Function

NVO_MODE nvoUnitStatus.mode xxxx Determine what mode RTU is in

OCCUPIED OCC Currently Occupied No/Yes Determine if RTU is occupied

IDFSTATE Indoor Fan State Off/On Determine if the RTU indoor fan isrunning

FANSPEED F.SPD Commanded Fan Speed xxx % Determine if the RTU indoor fan isrunning

ECONOCMD EC.CP Econo CommandedPosition

0 to 100 % Determine if the RTU commands freecooling

IAQ IAQ IAQ Level (sensor) xxxx Space CO2 sensor level (PPM)

IAQIN IAQ.S IAQ Level (switch) Low/High Determine if CO2 is high or low

SAT SAT Supply Air Temperature xxx.x ° F RTU supply air temp

OA_TEMP OAT Outdoor Air Temperature xxx.x ° F RTU Outdoor Temp

SPACE_T SPT Space Temperature xxx.x ° F Building Space Air Temp

RETURN_T RAT Return Air Temperature xxx.x ° F Building Return Air Temp

PE_1 PE.1 Power Exhaust 1 Relay Off/On N/A

PE_2 PE.2 Power Exhaust 2 Relay Off/On N/A

ECONO EC.EN Economizer Installed No/Yes No: no FIOPYes: FIOP

Determine if there is a Economizerdamper (wheel Bypass)

IAQANCFG IA.CF IAQ Analog Input Config 0=No IAQ1=DCV2=Override IAQ3=Ctrl Min Pos

0: no FIOP1: FIOP

Tells if a sensor is installed for DCV oroverride

IAQANFAN IA.FN IAQ Analog Fan Config 0=Never1=Occupied2=Always

0 Tells if the ERV can run duringunoccupied for high CO2

IAQINCFG II.CF IAQ Switch Input Config 0=No IAQ1=DCV N/O2=DCV N/C3=Override N/O4=Override N/C

0 Tells if a switch is installed for DCV oroverride

IAQINFAN II.FN IAQ Switch Fan Config 0=Never1=Occupied2=Always

0 Tells if the ERV can run duringunoccupied for high CO2

DAQ_LOW AQD.L AQ Differential Low 0 to 5000 100 Sets indoor/outdoor PPM differenceto start ventilating more

DAQ_HIGH AQD.H AQ Differential High 0 to 5000 700 Sets indoor/outdoor PPM at whichmax vent occurs

IAQOVPOS OVR.P IAQ Override Position 0 to 100 % 100 Sets OA fan speed during override

S_OADMPR OA.DM OAU 2---position Damper Close/Open Close Test damper while in test mode

S_WHEEL WHL OAU Wheel Test 0 to100 % 0 Test wheel while in test mode

S_OAFAN OA.OF OAU OA Fan Speed Test 0 to100 % 0 Test intake fan(s) while in test mode

S_EXFAN OA.XF OAU PE Fan Speed Test 0 to100 % 0 Test exhaust fan(s) while in test mode

S_OAHEAT OA.HT OAU Tempring Heater Test 0 to 100 % 0 Test tempering heater while in testmode

These can be viewed under a variety of menus on the Scrolling Marquee or Navigator

These can be viewed under a variety of CCN tables with a CCN device.

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Table 5 – Configurations -- ERV Configurations Read from ComfortLINK

CCN Point MarqueePoint Expanded Text Range Units Default Function

OAU_TYPE OA.TY Outdoor Air Unit Type 0=No OAU1=ERV Module2=Economizer3=Pwr Exhaust4=OA Monitor5=100% OA unit6=EXv1 ERV

0: no FIOP1: FIOP EXv2

Defines what kind of OAU isinstalled

OAFANCRV OA.FC Outside Air Fan Curve 0 to 999 1: 042: 05---063: 074: 08---125: 146: 17---207: 24---28

Determine what outside airfan curve to use

PEFANCRV PE.FC Exhaust Air Fan Curve 0 to 999 1: 04, 1ph, and econ2: 04, 3ph, and econ3: 04, 1ph, and no econ4: 04, 3ph, and no econ5: 05---06 1ph6: 05---06 3ph7: 078: 08---129: 1410: 17---20 and econ11: 17---20 and no econ12: 24---28

Determine what exhaust airfan curve to use

UNOCCRUN U.RUN OAU UnoccupiedOperation

No/Yes NO Tells OAU to run inunoccupied mode

FATALOAU OAU.F Shut Down on Fan Failure No/Yes YES Tells OAU to shut off if one ofit’s fans fail

MODWHEEL M.WHL Modulating Wheel Install No/Yes NO Determine if the OAU’s wheelis a modulating one

MINOACFM OA.MN Minimum Outside Air CFM 0 to 32000 CFM 375: 04800: 05---061000: 072500: 08---123000: 144000: 17---205000: 24---28

Sets Design OA CFM forventilation

MINDCVSP DCV.M Min DCV Outside Air CFM 0 to 32000 CFM 100: 04250: 05---06600: 071000: 08---121500: 14---242000: 24---28

Sets absolute minimum OACFM for ventilation

PEX_CTL PEX.C Power Exhaust Control 0=offset CFM1=BP

0 Determine how to control theexhaust fans

EXOFFSET PE.OF Power Exhaust CFMOffset

---17000 to 17000 CFM ---200 Sets offset CFM setpoint ofexhaust based on intake

OAU_BPSP BP.SP Building Pressure Setpnt ---0.25 to 0.25 inH2O 0.05 Sets required buildingpressure

OATEMPER OA.TM Outside Air Tempering Disable/Enable Disable Determine if there istempering heater installed

OATMPLOC TM.LO OA Tempring LockoutTemp

0 to 80 ° F 60 Sets the outside temp andbelow to allow tempering

OATMPSPT TM.SP OA Tempring SATSetpoint

35 to 80 ° F 55 Sets target Supply airtemperature during tempering

OACFM_K OAC.K Outside Air CFM k Factor 0.8 to 1.2 1.0 Sets outside air curvecorrection factor

EXCFM_K EXC.K Exhaust Air CFM k Factor 0.8 to 1.2 1.0 Sets exhaust air curvecorrection factor

EFB_ENBL EFBE ERV Fan Boost Enable No/Yes NO Tells RTU to adjust fan speedfor low outside air CFM

These can be viewed under Configuration→ OAU on the Scrolling Marquee or Navigator.

These can be viewed under the CCN Table OAU_CFG with a CCN device.

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Table 6 – Status Points -- ERV Writes these points to ComfortLINK

CCN Point MarqueePoint Expanded Text Range Units Function

OAU_RUN OA.RN OAU System Run State 1=AUTO2=OFF3=TEST

High level ERV state

OAU_MODE OA.OP OAU Operating Mode 0=Off1=ERV (DCV)2=Free Cooling3=OA Tempering4=Defrost5=Test6=Ext. Mode 17=Ext. Mode 28=Ext. Mode 3

ERV’s current operating mode

UPC_VER UPC UPC Software Version 0 to 9999 Active UPC software version

OAU_VER OAU OA Unit Software Version 0 to 9999 Active EXCB software version

ACTOACFM A.OA Actual Outside Air CFM 0 to 32000 CFM Real Time CFM being brought in

ACTEXCFM A.EX Actual Exhaust Air CFM 0 to 32000 CFM Real Time CFM being exhausted

CMDOACFM C.OA Command Outside Air CFM 0 to 32000 CFM Commanded CFM to bring in

CMDEXCFM C.EX Command Exhaust Air CFM 0 to 32000 CFM Commanded CFM to exhaust

OAU_LAT LAT OAU Leaving Air Temp xxx.x ° F Air temperature leaving the ERV (RTU intake)

OAU_EXAT EXAT OAU Exhaust Air Temp xxx.x ° F Air Temperature leaving the ERV (exhaust)

OAU_BP BP Building Pressure ---0.25 to 0.25 inH2O Current building pressure

OAUDMPR 2P.DM OAU 2---position Damper Close/Open Exhaust damper position status

OAUWHEEL WHL OAU Wheel Speed 0 to100 % Current ERV wheel speed

OAFANSPD OA.FS OAU OA Fan Speed 0 to100 % Current ERV’s intake fan(s) speed

OAUPESPD EX.FS OAU Exhaust Fan Speed 0 to100 % Current ERV’s exhaust fan(s) speed

OAHEATER OA.HT OAU Tempering Heater 0 to 100 % ERV’s SCR heater commanded capacity

OAUALRM1 ALM.1 OAU Motor Failure Alarm Off/On ERV’s motor failure alarm status

OAUALRM2 ALM.2 OAU Dirty Filter Alarm Off/On ERV’s dirty filter alarm status

OAUALRM3 ALM.3 OA Low CFM Alarm Off/On ERV’s low CFM alarm status

OAUALRM4 ALM.4 OAU Alarm Off/On ERV’s General Alarm status

These can be viewed under Run Status→ OAU or Operating Modes → OAU on the Scrolling Marquee or Navigator.

These can be viewed under the CCN tables OAUDISP or OAU_DIAG with a CCN device.

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15--25 Ton Modulating ERV

The modulating ERV is an intelligent ERV with variablespeed fan motors. The ERV can provide a variety ofvolumes of outside air and offset it with different exhaustspeeds. CO2 sensors can also be tied into it for Demand

control ventilation (DCV) operation. The modulating ERVwill operate based on occupancy and the rooftop’soperating mode, the following sections explain operationin detail. Refer to Figure 5 for the overview flow diagramof a modulating ERV operation.

YES

NO

YES

NO

YES

NO

Notes:* Min CFM represents the minimum outside air CFM requirement based on CO2 values and setpoints.

** Occupied also means being in the unoccupied period but configured to run.

NO

YES

Is there

frost on the

wheel?

YES

NO

Is unit

occupied**

and IDF on?

NO

YES

ERV Mode = OFF Wheel = off

ERV 2POS Damper = Closed

OA CFM = 0

Ex CFM = 0

ERV Mode = TestUser sets ERV to desired values for

testing purposes

OAU OA Fan Speed Test→OA.OF

OAU PE Fan Speed Test→OA.XF

OAU 2-position Damper Test→OA.DM

OAU Wheel Test→WHL

ERV Mode = Free CoolingWheel = stop-jog

ERV 2POS Damper = Open

OA CFM = Between Min CFM*

and 100 dependent on Econ Pos

Ex CFM = OA CFM - Ex CFM offset

ERV Mode = DefrostWheel = On


OA CFM = 0

Ex CFM = Min CFM* in effect

- Ex CFM offset

ERV Mode = ERV or DCV ModeWheel = On


OA CFM = Min CFM*

Ex CFM = OA CFM - Ex CFM offset

START

TEST(RTU in test

mode)

COOL(RTU in

Cool)

VENT(RTU in Heat,

or Vent)

Is economizeropen>than

5%?

C11463

Fig. 5 -- Modulating ERV Control & Operation Flow Chart

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Occupancy

The ERV will not be allowed to run unless it isdetermined to be occupied. The ERV monitors therooftop’s occupancy point (Run Status →MODE→OCC) to determine when it is occupied. The ERVwatches the rooftop’s indoor fan state point (CCN Point =IDFSTATE) to know when its indoor fan has started.When the rooftop is occupied and its indoor fan is on, theERV is considered to be occupied and allowed to run.

The ERV can also operate during the rooftop’s unoccupiedperiod. If the ERV is configured for unoccupied operation(Configurations →OAU→U.RUN = YES), then it willignore the building occupancy of ComfortLINK and allowoccupancy any time the rooftop fan is on. If notconfigured for unoccupied operation but there is a CO2sensor or switch installed and ComfortLINK is configuredto turn on its indoor fan for CO2 ventilation at any time(Configuration →AIR.Q →IA.FN = 2, or Configuration→AIR.Q →II.FN = 2), the ERV will be occupied anytime the CO2 needs the fan.

Modes of Operation

The ERV has 3 basic functions: Auto, Off, or Test. Theseare defined as System run states and displayed in the OAUrun status menu (Run Status →OAU →OA.RN). TheERV will always operate in one of the following operatingmodes depending upon the ComfortLINK mode andoutside conditions: Off, ERV (DCV) Free Cooling, OATempering, Defrost, or Test. The ERV monitors theComfortLINK CCN point NVO_MODE to determine therooftops operating mode. The NVO_MODE values tell theERV what the rooftop operating mode is in a numericform. The ERV’s operating mode is displayed numericallyas OAU Operating Mode (Run Status →OAU→OA.OP). These modes and their correspondingnumbers are described below.

Off Mode (OA.OP = 0) —

The ERV will be set to the Off mode whenever the rooftopindoor fan is turned off, ERV is unoccupied, NVO_MODEequals 6, or if communication fails. During Off Mode, theERV 2 position dampers will be closed and the wheel,outside air fans(s), and exhaust fan(s) will be off.

Test Mode (OA.OP = 5) —

If at any time during operation, the rooftop is put inService Test mode (NVO_MODE equals 7) the ERV willbe set to Test Mode. Refer to Start--Up section for Testmode operation.

Free Cooling Mode (OA.OP = 2) —

Free Cooling Mode is only available if an optionaleconomizer damper is factory installed in the ERV(Configuration →ECON →EC.EN = Yes). Free CoolingMode will be active when the rooftop unit is inUnoccupied Free Cooling Mode, Free Cooling Mode, orin Cooling Mode and the economizer damper position

(Outputs →ECON →EC.CP) is greater than 5%(NVO_MODE = 10 or 3). ERV occupancy tells thecontrol which speed to start the outside air fan(s) duringfree cooling, because the outside fan(s) are needed toassist the indoor fan in bringing in outside air.

When in Free Cooling Mode, the ERV’s 2 positiondamper will be open and the wheel will be set to stop/jogoperation. The rooftop unit will modulate the economizerdamper to provide free cooling as if an ERV was notinstalled. As the economizer damper opens the ERVoutside air fan(s) will maintain a speed that producesminimum outside air CFM. Once the economizer damperposition passes that percent fan speed of the outside airfan(s), the fan(s) speed will ramp up directly with theeconomizer damper position, up to 100%. The exhaustfan(s) will run at a speed equal to the required offsetCFM. Refer to Exhaust Control for details on determiningoffset CFM.

IMPORTANT: Refer to the base unit Controls, Start Up,operation, and Troubleshooting manual for details on howthe rooftop unit modulates the economizer damper for freecooling.

Defrost Mode (OA.OP = 4) —

Defrost Mode is only available when the optional FrostProtection is factory installed in the ERV. The ERV willbe set to defrost mode any time the ERV wheel is runningand frost is detected on the wheel. The EXCB D14 LEDwill turn on to indicate the frost switch is active. DefrostMode runs for at least 2 minutes but continues to run untilthe frost is removed. The frost protection device senses apressure differential across the wheel and trips when thatdifferential is greater than the setpoint (default 2.0 in wc).For information on the frost protection device, refer to theMajor Component section.

When in Defrost Mode, the ERV 2 position damper willbe open and the wheel will be rotating. The outside airfan(s) will ramp down to 0% speed (shut--off). Theexhaust fan(s) will run at a speed equal to the requiredoffset CFM. Refer to Exhaust Control for details ondetermining offset CFM.

ERV (DCV) Mode (OA.OP = 1) —

General ERV Mode – ERV Mode is the basic operatingmode of the ERV. With no options installed on the ERVthis will be the only operating mode besides off and test.ERV Mode will be active when the rooftop ComfortLINKmode is Heating, Cooling, Fan Only, or Dehumidification(NVO_MODE = 1, 3, 9, or 14) and the ERV is occupied.

When in ERV mode, the ERV 2 position damper will beopen and the wheel will be rotating. The outside air fan(s)will run at a speed that produces a CFM equal to theminimum outside air CFM setpoint (Configuration→OAU →OA.MN). The exhaust fan(s) will run at aspeed equal to the required offset CFM. Refer to ExhaustControl for details on determining offset CFM.

ERV Mode with DCV – If an optional economizer isfactory installed in the ERV (Configuration →ECON→EC.EN = Yes) and an optional CO2 sensor or switch is

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installed (Configuration →AIR.Q →IA.CF = 1 or 2) or(Configuration →AIR.Q →II.CF = 1 or 2), DCV ERVMode will be active when the rooftop ComfortLINKmode is Heating, Cooling, Fan Only, or Dehumidification(NVO_MODE = 1, 3, 9, or 14) and the ERV is occupied.

When in DCV ERV mode, the ERV 2 position damperwill be open and the wheel will be rotating. The outsideair fan(s) will run at a speed that produces a CFM equal tothe minimum outside air CFM determined by DemandControl Ventilation (DCV). The exhaust fan(s) will run ata speed equal to the required offset CFM. Refer toExhaust Control for details on determining offset CFM.

Sensor Demand Control Ventilation (DCV) uses theindoor air quality levels (CO2 PPM) to determine howmuch outside air is required for ventilation. The ERVmonitors the IAQ (Inputs →AIR.Q →IAQ) reading fromthe rooftop’s installed CO2 sensor and compares it to ahard coded outside air value of 400PPM. The difference isthen weighed on scale between AQ Differential Low(Configuration →AIR.Q →AQD.L) and AQ DifferentialHigh (Configuration →AIR.Q →AQD.H) to determinethe minimum outside air CFM required for ventilation.The minimum outside air CFM can be equal to or betweenthe Min DCV outside air CFM (Configuration →OAU→DCV.M) setpoint and the minimum outside air CFM(Configuration →OAU →OA.MN) setpoint. As the CO2differential rises from AQD.L to AQD.H, the ERV outsideair CFM requirement will rise from DCV.M to OA.MN.The outside air fan(s) will ramp its speed % up or down toproduce the required CFM. If at any time the CO2 sensorfails or IAQ reads 0ppm, the DCV minimum outside airrequirement will be forced to the maximum value(OA.MN). Fig. 6 shows the DCV minimum outside airCFM determination curve.

VENTILATION FOR PEOPLE

VENTILATION FOR SOURCES

INC

REA

SIN

G V

ENTI

LATI

ON

MinimumOutside Air CFM(Min Outside Air CFM)

DCV Outside AirCFM Setpoint(DCV OA SP CFM)

100 700 INSIDE OUTSIDECO2 DIFFERENTIAL

AQDIFFERENTIALLOW (AQD.L)

AQDIFFERENTIALHIGH (AQD.H)

C11464

Fig. 6 -- IAQ DCV Control

Switch Demand Control Ventilation (DCV) uses theindoor air quality levels (High/Low) to determine howmuch outside air is required for ventilation. The ERVmonitors the IAQ switch (Inputs →AIR.Q →IAQ.S)

reading from the rooftop’s installed CO2 switch. Theminimum outside air CFM will be equal to one of thefollowing: Min DCV outside air CFM (Configuration→OAU →DCV.M) setpoint, or the minimum outside airCFM (Configuration →OAU →OA.MN) setpoint. If theCO2 switch reads low the outside air CFM requirementwill be DCV.M. If the switch reads high the outside airCFM requirement will be OA.MN. The outside air fan(s)will ramp its speed % up or down to produce the requiredCFM.

OA Tempering Mode (OA.OP = 3) —

OA Tempering Mode is only available when the optionalelectric heater is field installed in the ERV and enabled(Configuration →OAU →OA.TM = Enable). The ERVcan only be set to OA Tempering mode when the ERV isoccupied and the rooftop is not running cooling orheating. The rooftop must be in Ventilation (Fan--Only)mode (NVO_MODE = 9) and the outside air temperature(Inputs →AIR.T →OAT) must be less than the OATempering Lockout Temp (Configuration →OAU→TM.LO) to allow the ERV to run OA Tempering Mode.The electric heater will then be turned on and modulated0--100% based on the supply air temperature (Inputs→AIR.T →SAT) relative to the OA Tempering SATsetpoint (Configuration →OAU →TM.SP).

When in OA Tempering Mode, the ERV runs as standardERV (DCV) mode: 2 position damper will be open andthe wheel will be rotating. The outside air fan(s) will rampto maintain correct outside air CFM. The exhaust fan(s)will ramp for the required offset CFM. Additionally theERV’s Electric Heater will ramp up 1% every 2 secondsand ramp down 2% every 1 second based on how far theSAT is away from the setpoint. If the SAT equals thesetpoint then the Electric heater will remain at currentpercentage.

Exhaust Control

When the Power Exhaust control is set of Offset CFM(Configuration →OAU →PEX.C = 0), the ERV exhaustfan(s) operate to offset the outside air being introduced tothe building. The required exhaust offset CFM isdetermined based on the exhaust offset setpoint(Configuration →OAU →PE.OF). The exhaust offsetsetpoint can be set as a negative or positive number toaccommodate a requirement of positive or negativebuilding pressure. A positive setpoint will produce anegative building pressure. A negative setpoint willproduce a positive building pressure.

The ERV will determine the required amount of outsideair CFM based on setpoints and current mode ofoperation. The commanded exhaust air CFM (Run Status→OAU →C.EX) is then calculated by the sum of theactual outside air CFM (Run Status →OAU →A.OA)and the exhaust air offset setpoint (PE.OF). During defrostmode the exhaust will run the same as if the outside airfan(s) were still running.

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When the Power Exhaust Control is set for Buildingpressure control (Configuration →OAU →PEX.C = 1),the ERV exhaust fan(s) operate to maintain a buildingpressure. A building pressure transducer must bepurchased separately and properly field installed in theERV. A desired building pressure is set as BuildingPressure Setpoint (Configuration →OAU →BP.SP). Theactual building pressure (Run Status →OAU →BP) iscompared to the setpoint (BP.SP). The exhaust fan willthen be ramped up and down at the rate of 1% every 2seconds to try and maintain the desired building pressure.The exhaust fan(s) will slow to increase the buildingpressure and speed up to decrease the building pressure.

Wheel Stop/Jog

During free cooling the wheel utilizes a “stop--jog”operation to periodically rotate the wheel and minimizepotential dirt build--up and excess wear on one section ofthe wheel. The wheel will rotate for 5 seconds then stopfor 5 minutes.

Status Points

The ERV updates points within ComfortLINK to representits running status. These points are shown in Table 6 andcan be viewed on the scrolling marquee or handheldnavigator under the run status outside air menu (RunStatus →OAU). These points include but not limited to:commanded and actual outside air CFM, commanded andactual exhaust air CFM, ERV outputs, software versions,and internal ERV air temperatures.

TROUBLESHOOTING

EnergyX units are a combination of the base rooftop unitand an integrated ERV. The ERV requires communicationfrom the rooftop for operation. This section covers ERVtroubleshooting only. For rooftop troubleshooting refer tothe base unit’s Service manual.

Complete ERV Stoppage

There are several conditions that can cause the ERV toshutdown or appear to be shutdown:

S General power failure.

S Transformer’s circuit breaker tripped.

S ERV main power fuses blown.

S Communication failures.

S Active alarm on the base rooftop unit or the ERVpreventing operation. Review alarms.

S Programmed occupancy schedule. Rooftop Unoccupied

S Rooftop indoor fan is off.

S The airflow sensor tubing connected to the incorrecthigh/low sensor ports in the outside air.

Check Alarms

The ERV has 4 possible alarms based on options installedin the ERV. These alarms are described in detail below.They all show up as a T418 alarm in ComfortLINK.Pressing enter and escape together on the scrollingmarquee or navigator will expand the text and provide thespecific alarm condition. There are 4 status points viewedunder Operating Modes on the Scrolling Marquee orNavigator (Operating Modes → OAU) for each alarm tohelp diagnose which alarm caused the T418 inComfortLINK. These will all reset automatically when thesituation has been resolved.

T418 OAU Filter Dirty

The ERV’s dirty filter alarm should only occur if theoptional Filter Maintenance Switch is installed on theERV. The dirty filter alarm activates due to an increase indifferential pressure across the filters. The EXCB’s D16LED will be turn on and the OAU Dirty Filter Alarmpoint will be turned to on (Operating Modes → OAU →ALM.2 = On). The alarm does not affect unit operationbut serves as a warning to replace the filters. It willautomatically reset when the pressure differential fallsbelow setpoint. Verify proper operation by partiallyblocking airflow through the ERV filters and confirmingthat the alarm does trip.

T418 OAU Motor Failure

This alarm indicates a motor problem in the ERV, any oneof the motors can trip this alarm (outside intake, exhaustand/or the wheel motor). The intake and exhaust motorshave build in motor diagnostics and the wheel motorstatus is a field accessory. Since these are feed into thesame alarm, it is important to determine which one ishaving the problem. In test mode run the componentsindividually to determine which is causing the problem. Ifthe Shut Down on fan failure configuration is set to Yes(Configuration → OAU → OAU.F = Yes), the ERV willshutdown with this alarm active. If set to no, the ERV willcontinue to run as if the alarm did not occur, outside airCFM, exhaust CFM, or pre--conditions might not beachievable if a motor fails. The two classes of motorstatus are explained below.

Intake and Exhaust Motor Status – If any one of theERV’s outside or exhaust motors detects a problem, it willclose its build in normally open alarm contact, which willbe seen as 24vac at EXCB J8--3. The EXCB’s D18 LEDwill be turn on and the OAU Motor Failure Alarm pointwill be turned to on (Operating Modes → OAU →ALM.1 = On). This alarm will automatically reset whenthe motor opens its alarm relay. This alarm is tripped byone of the following: phase loss, locked rotor, thermaloverload, communication error, incorrect signal, or a fanfailure.

Wheel Status – This alarm will occur when the ERVwheel is turned on and the wheel proxy sensor does notdetect wheel motion within the set time. It will open its

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contact which energizes the normally closed rotationmonitor relay. This is seen as 24vac at EXCB J5--3 andcauses the alarm. The EXCB’s D12 LED will be turned onand the OAU Motor Failure Alarm point will be turned toon (Operating Modes → OAU → ALM.1 = On). Thisalarm will automatically reset when motion is detected.Possible causes of this alarm are: the wheel belt breakingor slipping, wheel motor failure, proxy sensor failure orincorrect setting, or wiring error.

T418 OAU Low CFM

This alarm indicates that the ERV cannot bring in thedesired amount of outside air. The alarm occurs when theactual outside air CFM (Operating Modes → OAU →A.OA) is less than 10% of the commanded outside airCFM (Operating Modes → OAU → C.OA) after 10minutes. This alarm will not occur in test mode or defrostmode. The Rooftop unit might be able to help by rampingits indoor fan up. Refer to the base controls, start up,operation, and troubleshooting manual for details. TheOAU Low CFM Alarm point will be turned to on(Operating Modes → OAU → ALM.3 = On). This alarmwill automatically reset if the actual CFM is within 10%of the commanded CFM. Possible causes of this are:outside air CFM setpoint set too high, dirty filter orplugged screen, pressure tubing wrong or disconnected,wrong OA CFM curve programmed, or RTU indoor fanspeed running too low.

T418 OAU General Alarm

This alarm is not currently used by the ERV.

Check Diagnostic LEDs

Use the on board LEDs to assist in troubleshooting theEnergyX system. The EnergyX Control Board (EXCB)and the Universal Protocol Converter (UPC) each haveLEDs that can help in the troubleshooting process. SeeTables 7 to 9.

The EXCB has five green LEDs and one red LED. Thered LED is for power indication and the green LEDs arestatus indicators.

The UPC has seven LEDs. There are four communicationLEDs and three status LEDs. The communication LEDsindicate if the translator is speaking to the devices on thenetwork and should reflect communication traffic basedon the baud rate set. The higher the baud rate, the LEDswould become more solid.

Communication Failures

Communication is critical for ERV operation. It can fail ontwo different paths; between the UPC and the rooftop(LEN), or between the UPC and the EXCB. This makes theUPC critical to ERV operation. Make sure the UPC DIPswitches and rotary switches are set correctly. Make sure theboard hardware jumpers are set on EIA 485 and 2W. Duringnormal operation the 4 communication LEDs will flashinterchangeably. If all 4 LEDs are not flashing then there is acommunication problem. Check connections between Port1a and rooftop’s LEN connection and Port 2 and the EXCBJ23 (verify with the proper unit schematic).

The ERVs, LCD screen will show specific communicationfailures when they occur. Use the LCD screen to helptroubleshoot communications failures. If communicationis established, the LED shows “communicationconnected”.

Comm Failure1 – UPC to LEN Fail —

This will be displayed if the EXCB can communicate withthe UPC, but the UPC does not receive information fromComfortLINK. This will occur if the cable is pinched ordisconnected, wired wrong or loose, or if the UPC isconfigured wrong.

Comm Failure2 – UPC to EXCB Fail —

This will be displayed if the EXCB cannot communicatewith the UPC. This will occur if the connection betweenthem is disconnected or pinched. This will also occur ifthe UPC does not have power or software, or if it has anerror or configured wrong.

On--board Pressure Transducers

The EXCB uses on--board pressure transducers to measurethe air pressure of the incoming outside air and thebuilding exhaust air. The CFM values are then calculatedbased on these readings and the fan speed. There is apressure transducer for the outside air and one for theexhaust air. These are screwed into the EXCB board toJ24 and J25 respectively. They have three pins: IN, GND,and OUT. The IN pin is 5vdc input power and GND is thecommon or ground pin. The OUT pin will be 0.26 to4.5vdc based on the pressure reading. There are twodifferent transducers used, two inch of water column(inWC) and 5 inWC. Table 10 shows the voltage/pressurecharacteristics of each.

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20

Table 7 – EXCB LED Indicators

LED COLOR DESCRIPTION STATUS IF LIGHT IS LIT

D9 Red 24vAC board power Board has power

D2 Green Run light Flashing ERV is Running

D12 Green ERV Wheel Status Alarm ERV Wheel not rotating when it should be

D14 Green ERV Wheel Frost Protection ERV detects frost on the wheel and running in Frost Mode

D16 Green ERV Dirty Filter Alarm Dirty Filter

D18 Green ERV Blower Status Alarm Fan Failure

Table 8 – EXUPC LED Indicators

LED COLOR DESCRIPTION STATUS IF LIGHT IS LIT

Power Green Power Indicator Lights when power is being supplied to the translator.

Rx1 Green Port 1 Receiving Data Lights when the translator receives data from ComfortLINK MBB via LEN

Rx2 Green Port 2 Receiving Data Lights when the translator receives data from the Modbus EXCB

Tx1 Green Port 1 Transmitting Data Lights when the translator transmits data to the ComfortLINK MBB via LEN

Tx2 Green Port 2 Transmitting Data Lights when the translator transmits data to the Modbus EXCB

Run Green Run indicator Lights based on translator health. See Table 9.

Error Red Internal Error indicator Lights based on translator health, See Table 9.

Table 9 – EXUPC LED Flash Code Diagnostics

Run LED Status Error LED Status ERV Module Status

2 flashes per second Off Normal

2 flashes per second 2 flashes, alternating with Run LED 5 minute auto--- restart delay after system error

2 flashes per second 3 flashes then off Module has just been formatted

2 flashes per second 4 flashes then pause Two or more devices on this network have the sameARC156 network address

2 flashes per second 1 flash per second Module is alone on the network

2 flashes per second On Operation halted after frequent system errors orcontrol programs halted

5 flashes per second On Operation start---up aborted. Boot is running

5 flashes per second Off Firmware transfer in progress. Boot is running

7 flashes per second 7 flashes per second, alternating with Run LED Ten second recovery period after brownout

14 flashes per second 14 flashes per second, alternating with Run LED Brownout

Alternating with Error Alternating with Run Restoring memory from Archive

Table 10 – Transducer/Voltage vs. Pressure

Voltage(vDC)

Pressure (inWC)

2” transducer 5” transducer

<=0.26 0 0

0.5 0.12 0.28

1 0.34 0.87

1.5 0.53 1.46

2 0.82 2.05

2.5 1.06 2.64

3 1.30 3.23

3.5 1.52 3.82

4 1.76 4.41

4.5 2.00 5.00

MAJOR SYSTEM COMPONENTS

An EnergyX unit has a factory installed energy recovery(ERV) device on a 48/50HC rooftop unit. The EnergyXenergy recovery unit is integrated into the base rooftopunit construction and is factory wired. The energyrecovery unit contains a control box, supply fan(s),exhaust fan(s), and an enthalpy wheel assembly. Allcontrol operations of the ERV are based on the rooftopunits operation through communication with ComfortLINK.See Fig. 7 and 8 for ERV wiring schematic and componentarrangement.

EnergyX

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C11466

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EnergyX

22

C11465

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EnergyX

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EnergyX Control Board (EXCB)

See Fig. 9 and Table 11.

The EXCB board is the muscle of the ERV control system.It acts as just an I/O board that does what the UPCcommands. The EXCB continuously monitors input/outputchannel information received from its inputs and from theUniversal Protocol Converter (UPC). The EXCB receives

inputs from transducers and discrete inputs. See Options andAccessories section. The EXCB has relay analog outputs,and is equipped with a LCD screen. The EXCBcommunicates with a Modbus protocol and is not a CCNdevice. The EXCB is a reset button that is used to force allthe outputs and reset communication.

NOTE: There are hardware jumpers set throughout the.Do not change these jumpers.

C11467

Fig. 9 -- EnergyX Control Board (EXCB)

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24

Table 11 – EXCB Input/Output Connections

POINT DESCRIPTION SENSOR LOCATION Input/Output TYPE OFInput/Output

CONNECTIONPIN NUMBER

Download N/A Both Communication J1

LCD Low voltage control box Both Communication J2

Power from TRANS Control box Input 24VAC J3, 1---2

Power to Relays Low voltage control box Output 24VAC J4, 1

Power to UPC Low voltage control box Output 24VDC J4, 3---4

Wheel Rotation Sensor Attached to scoop Input Switch J5, 2---4

Frost Switch Attached to scoop Input Switch J6, 3---4

Filter Status Switch Attached to scoop and in Exhaustair section Input Switch J7, 3---4

Motor Status Switches Integrated in motors Input Switch J8, 3---4

Leaving Air Temp Scoop section Input 10K J15, 1---2

Exhaust Air Temp Exhaust air section Input 10K J16, 1---2

Wheel Relay High voltage control box Output Relay J17, 4

2---position Exhaust damper relay Exhaust damper assembly Output Relay J19, 4

OA fan speed signal N/A Output 2---10vdc J21, 1---3

OA Modulating Damper Intake damper assembly Output 2---10vdc J21, 1---4

EX fan speed signal N/A Output 2---10dvc J22, 1---3

Modbus to UPC Control box Both Communication J23, 1---3

Outside Air pressure Transducer Low voltage control box Input Digital 0---5vdc J24

Exhaust Air pressure Transducer Low voltage control box Input Digital 0---5vdc J25

Building Pressure Sensor Low voltage control box Input 4---20mA J10, 1---6

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25

Universal Protocol Converter (UPC)

See Fig. 10 and Table 12.

The UPC board is required to convert CCN into Modbus.It is also the brains behind the ERV. It contains theoperating software that runs the ERV logically. The UPC

is connected to the ComfortLINK LEN bus on the rooftopunit.

NOTE: The DIP switches should be set as follows: 1=off,2=off, 3=on, 4=on, 5=off, 6=off, 7=on, and 8=off. Theaddress rotary switches should be set to 01 (10’s=0 and1’s=1). Do not change these settings.

C11468

Fig. 10 -- Universal Protocol Converter (UPC)

Table 12 – UPC Input/Output Connections

TERMINAL NAME DESCRIPTION Input/Output TYPE OFInput/Output

CONNECTIONPIN NUMBER

24VAC Supply power to UPC Input 24VAC 1---2

Port 2 UPC Modbus both Communication 1---2

Port 1a UPC LEN both Communication 1---3

Port 1b Not used N/A N/A N/A

Rnet BACview User Interface orDownload Connection

both Communication 1---4

Local Access both Communication 1---5

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User Interface

All ERV set point adjustment, service tests, and monitoringare accomplished through the ComfortLINK scrollingmarquee interface. See the ComfortLINK Controls,Start--Up, Operation and Troubleshooting Instructions forfurther details on ComfortLINK operation. The ERVEXCB board has a LCD screen that can be used to helptroubleshoot communication problems. The following areexamples of the text that can be seen on the EXCB’s LCDscreen.

LCD Texts —

Initialize_LEN Communication – This will occur whenthe ERV is turned on from a power reset.

Communication Connected – This will be displayedwhen correct communication is established between theRTU and ERV and within the ERV.

Comm Failure1 UPC_to_LEN_Fail – This occurs ifthere is a communication problem between the UPC andComfortLINK MBB.

Comm Failure2 UPC_to_EXCB_Fail – This will occurif there is a communication problem between the UPC andthe EXCB.

Warning UPC TestMODE_Enabled – This will occur ifthe UPC was left in a factory Test mode a BACviewHandheld is needed to pull the ERV out of this mode backto normal running mode.

Enthalpy Wheel

The enthalpy wheel is the “heat exchangers” of the ERV.It consists of several wheel segments aligned in a cassetteassembly. These are not “filters” but made of a desiccantmaterial. The wheel is rotated by a motor and belt, noadjustments required. When the wheel rotates it uses thebuilding exhaust air to pre--conditions the outside air as itpasses through the wheel.

Modulating Fan

The modulating ERV is equipped with direct drivevariable speed plenum fans for outside air intake andexhaust air. The motors have built in VFDs that accept a2--10vdc signal from the EXCB. This 2--10vdc signal isused by the VFD to determine the speed to run the motorat (0--100%). Some ERV models are equipped withmultiple outside air and/or exhaust air fans. The additionalmotor’s signal is parallel off the first motor through thecoupling signal plug. Motor status switches are alsoparalleled for additional motors.

Each motor is capable of diagnosing problems within themotor to provide fan status. The fan status switches arebuilt into each motor and provide a feedback to the EXCBif a problem is detected. The feedback signal is a discreteinput that is normally open, when closed the EXCB willinitiate the motor status alarm.

Modulating Outside Air Damper

ERV units include a factory installed modulating outside airdamper. This damper is controlled in parallel with themodulating intake fan(s). This damper adds static to theoutside air and will be open to the same percentage as theoutside air fan(s) is running. The modulating outside airdamper will also close in the unoccupied mode to preventunwanted air from being introduced to the rooftop unit.

Options and Accessories

The modulating ERV has several optional factory installedoptions and field installed accessories: Frost Protection,Economizer, Wheel Motor Status, Filter Maintenance,horizontal adaptor curb, building pressure sensor, OutsideAir Tempering Kit, and 2--Position Exhaust Damper. Referto Table 11 for where these options wire into the EXCB.

Economizer Damper (factory installed only)

The economizer damper is a factory installed option thatprovides a wheel bypass damper. This damper is controlledby the base unit rooftop as an economizer for the purpose offree cooling. The damper is installed adjacent to the ERVwheel to allow outside air to flow through it when openedinstead of the wheel. The ERV’s outside air fan(s) will runas this damper is opened to allow proper airflow.

Frost Protection (factory installed only)

Frost protection is a factory installed pressure sensor devicewhich senses a differential pressure across the wheel. Thisoccurs if frost builds up on the wheel. The sensor closes itscontact when the pressure differential is greater than thesetpoint. When the EXCB reads the contact closer it willactivate defrost mode. The setpoint is a dial on the sensor, isadjustable from 0.2 to 2.0 inWC, and is factory preset to 2.0inWC. Changing this setting may cause false signal causingdefrost mode when not needed.

Wheel Motor Status (field install only)

The wheel motor status accessory can be installed in thefield and consists of a wheel motion proxy sensor and arelay. The wheel motion sensor is aimed at the wheel todetect rotation. If the wheel does not rotate at the appropriatespeed the sensor will open causing the rotation monitor relayto close a contact to initiate the wheel status alarm. Themotion sensor is factory set at the highest speed (clockwiseuntil stop) and should not be changed. Refer to thetroubleshooting section for details on the alarms.

Filter Maintenance (field install only)

Filter maintenance consists of two field installed pressuresensor devices which sense differential pressure across theERV filters. This occurs if dirt builds up on the filters.There is a separate pressure sensor for each filter (outsideair and exhaust air). The sensor closes its contact when the

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27

pressure differential is greater than the setpoint. Thesensors are wired in parallel, so when the EXCB reads acontact closer from either sensor it will activate the filteralarm. The setpoint is a dial on the sensor, is adjustablefrom 0.2 to 2.0 inWC, and is factory preset to 2.0 inWC.Changing this setting may cause false signal causing falsedirty filter alarms.

Horizontal Transition Curb (field install only)

EnergyX units must receive vertical return. If theapplication requires horizontal return then a horizontaltransition curb must be used. The 15--25 ton units cannotbe field converted to horizontal supply. To accomplishhorizontal supply on a 15--25 ton unit a horizontaltransition curb must be used.

SERVICE & MAINTENANCE

Refer to base unit’s Service manual for base unit service andmaintenance. This section contains service and maintenancefor just the ERV unit.

Cleaning

Wheel and Segment Cleaning

Wheel cleaning periodicity is application dependent. Fieldexperience shows that offices, schools and other “clean”environments will often go 10 years before any build upof dust and dirt is noticed. Other applications such asrestaurants, casinos and factory environments mayexperience fairly rapid build--up of contaminants and mayrequire multiple cleanings per year to maintain airflowand recovery efficiencies.

All air--to--air energy recovery devices will become dirtyover time, even with well--maintained filtration. Properfiltration usage and changes will improve the life of thewheel transfer segments. Once the wheel is exposed tooils, tars or greases in either the supply or exhaust airstreams, these pollutants deposit on the rotary surfacewhich they become “sticky” and begin to attract and holdthe dust particles that previously passed thru the wheel.Over time this particle build up can lead to blockedairflow passages, loss of recovery, excessive pressure dropthrough the wheel and loss of energy savings.

1. Follow steps for wheel and segment removal toremove the affected energy transfer matrix segments.

2. Gently brush the wheel face to remove looseaccumulated dirt.

3. Wash the segments with a non--acid based(evaporator) coil cleaner or alkaline detergentsolution. Non--acid based coil cleaner such as KMPActi--Clean AK--1 concentrate in a 5% solution hasbeen demonstrated to provide excellent results. DONOT use acid based cleaners, aromatic solvents,temperatures in excess of 170_F or steam! Damage tothe wheel will result.

4. Soak the wheel and/or segments in the cleaningsolution until all grease and tar deposits are loosened.

An overnight soak may be required to adequatelyloosen heavy deposits of tar and oil basedcontaminants.

5. Internal heat exchange surfaces may be examined byseparating the polymer strips by hand. (Note: somestaining of the desiccant may remain and is not harm-ful to performance.)

6. After soaking, rinse the dirty solution from the wheelsegments until the water runs clear.

7. Allow excess water to drain prior to replacing seg-ments in the wheel. A small amount of water remain-ing in the wheel will be dried out by the airflow.

Filters

Clean or replace at start of each heating and coolingseasons, or more often if operating conditions require(based on filter manufacture recommendation or filterstatus alarm indication). Refer to Tables 1 and 2 for typeand size of filters.

Outdoor--Air Inlet Screens

Clean screens with steam or hot water and a milddetergent at the beginning of each heating and coolingseason. Do not use throwaway filters in place of screens.

Lubrication

All component bearings are sealed and do not requirelubrication.

Wheel Drive Adjustment

The wheel motor and drives do not require adjustment.The wheel drive pulley is secured to the drive motor shaftby a set screw. The set screw is secured with removablelocktite to prevent loosening. Annually confirm set screwis secure. The wheel drive belt is a urethane stretch beltdesigned to provide constant tension throughout the life ofthe belt. Inspect the drive belt annually for proper trackingand tension. A properly tensioned belt will turn the wheelimmediately after power is applied with no visibleslippage during start--up.

Wheel Air Seal Adjustment

Diameter seals are provided on each wheel cassette tominimize transfer of air between the counter flowingairstreams. Follow below instructions if adjustment isneeded.

1. Loosen diameter seal adjusting screws and back sealsaway from the wheel surface. See Fig. 11.

2. Rotate the wheel clockwise until two opposing spokesare hidden behind the bearing support beam.

3. Using a folded piece of paper as a feeder gauge, posi-tion the paper between the seal and wheel surface.

4. Adjust the seal towards wheel surface until a slightfriction on the feeder gauge (paper) is detected whilemoving the gauge along the length of the spoke.

5. Re--tighten adjustment screws and re--check clearancewith the feeder gauge.

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28

Rotation

Adjusting Screws

Feeler Gauge

ToAdjust

C11469

Fig. 11 -- Diameter Seal Adjustment

Wheel and Segment Removal / Installation

The wheel and segments represent a substantial portion ofthe value of the cassette therefore must be handled withcare and never be dropped. Use a suitable crate or harnessto lift wheel and segments to a roof surface, never use theshipping cartons for this purpose. Wheel and segmentsmay require “slight” persuasion during installation andremoval but never forced or impacted with a hammer orsimilar tool. The wheel assembly can be removed andinstalled or the wheel or segments can be removed fromthe assembly.

UNIT DAMAGE HAZARD


The weight of the wheel assembly must be supportedwhen the assembly is extended from the unit chassisto avoid damage to wheel or unit.

CAUTION!

ERV wheels on 15 to 25 ton units are segmented wheelassemblies. To remove or installed the whole assembly,simply side in or out the assembly noting the motor powerplug.

Wheel Segment Removal / Installation

1. Turn off, lockout and tag--out electrical power to unit.2. Open access door to the EnergyX module on back

side of the unit.3. Slide the entire wheel assembly out until the necessary

segment(s) of the wheel can be accessed. Support theweight of the wheel assembly as necessary to avoiddamage to wheel or unit.

PERSONAL INJURY HAZARD

Failure to follow this caution may result in personalinjury.

Weight of the installed segment will cause the wheelto accelerate in rotation as segments are removed.Failure to maintain control of the wheel rotation whileinstalling all segments could cause severe injury tofingers or hand caught between revolving spokes andthe bearing support beam. The handle of a tool such asa hammer, should be inserted through spokes andabove or below bearing support beams to limitrotation of unbalanced wheel. See Fig. 12.

CAUTION!

Hammer usedas a “stop”

C11470

Fig. 12 -- Wheel Stop

4. Position one segment opening at the top of the cassette.5. Unlock and open the segment retaining brackets on both

sides of the selected segment opening. See Fig. 13.

Catch Pull Tab

C11471

Fig. 13 -- Segment Retaining Brackets

6. Gently lift segment outward.7. Close segment retaining latches and rotate wheel

180_ to remove next segment. Follow this pattern toremove all segments and keep wheel balanced.

8. To install the wheel segments, hold the segment asvertically as possible and centered between spokes,insert nose of segment downward between the hubplates. See Fig. 14.

NOTE: The face of the segment, with the imbedded stiffener(vertical support between nose and rim end of segment) mustface the motor side of the cassette. See Fig. 15.

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29

C11472Fig. 14 -- Segment Removal

Imbedded Stiffeners

C11473

Fig. 15 -- Imbedded Wheel Stiffeners(shown from motor side of wheel assembly)

9. Ease the segment downward until its outer rim clearsthe inside of the wheel rim. Press the segment inwardagainst the spoke flanges.

10. Close and latch segment retaining brackets to the pos-ition shown in Fig. 13 Make certain the retainingbracket is fully engaged under the catch.

11. Slowly rotate, by hand, the first installed segment tothe bottom of the cassette, and then install the secondsegment opposite the first. Repeat this sequence withthe two installed segments rotated to the horizontalposition to balance the weight of installed segments.

12. Continue this sequence with the remaining segmentsas necessary.

13. When complete, close access door and remove lock-out and tag--out to apply power to unit.

Whole Wheel Removal/Installation(36” & 46” wheels)

These wheels include the shaft and are secured to tow wheelsupport beams by two flange bearings with locking collars.

Follow the steps below for removal and reverse forinstallation. See Fig. 16.

1. Loosen the two set screws on each to the two wheelbearings.

2. Remove belt from pulley and position temporarilyaround wheel rim.

3. Remove pulley side wheel support beam with bear-ing, by removing four support beam screws.

4. Pull the wheel with the shaft straight out of the motorside wheel support beam and bearing. Handle wheelwith care.

5. When replacing wheel be certain to tighten four bear-ing set screws. Premature bearing failure can occur ifnot set tightly.

WHEEL,HUB &SHAFT

SETSCREWS(2 EACH)

FLANGEBEARINGS(2)

WHEEL SUPPORT BEAMS

C11474Fig. 16 -- 36” & 46” Wheel Mount

Outside Air and Exhaust Air Hood Removal

Outside Air Hood Removal

1. Turn off, lockout and tag--out electrical power to unit.2. Remove the hood by removing the seal--tek screws

along the perimeter of the hood. See Fig. 17.NOTE: Even after all screws have been removed fromentire perimeter of hood, it will still be difficult to removedue to the gasket applied from original installation. Takecare not to damage the gasket. If damage occurs use9430--2300 gasket to replace before reattaching the hood.

3. Disconnect the green (HIGH) and yellow (LOW)tubes attached to the quick connects located inside theERV. Do NOT damage the tubes.

Exhaust Air Hood Removal

1. Turn off, lockout and tag--out electrical power to unit.2. Remove the hood by removing the seal--tek screws

along the perimeter of the hood.NOTE: Even after all screws have been removed fromentire perimeter of hood, it will still be difficult to removedue to the gasket applied from original installation. Takecare not to damage the gasket. If damage occurs use9430--2300 gasket to replace before reattaching the hood.

EnergyX

30

Detail “A”High and Low

Quick Connects

A

C11491

Fig. 17 -- Outside Air Hood Removal

C11492

Fig. 18 -- Exhaust Air Hood Removal

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31

Outside Air Motorized Damper Removal1. Turn off, lockout and tag--out electrical power to unit.2. Remove the outside air motorized damper access

panel by removing the seal--tek screws around theperimeter (see Fig. 19).

NOTE: Even after all of the screws have been removedfrom the panel it still may be difficult to remove due tothe gasket applied from the original installation. Take carenot to damage the gasket. If damage occurs use9430--2300 gasket to replace before reattaching the panel.

3. Disconnect the connector labeled PL06 for thedamper motor from the wiring harness inside the airchamber of the EnergyX unit.

4. Slide out the outside air motorized damper by pullingit along the track guides. See Fig. 19.

Outside Air and Exhaust Fan Replacement

Outside Air Fan Removal

1. Turn off, lockout and tag--out electrical power to unit.2. Remove outside air hood (see procedure on page 29).3. Remove outside air motorized damper (see procedure

on page 31).

4. Remove the lower and upper guides for the outsideair motorized damper by removing the screws alongthe length of the flanges connecting them to theinside fo the ERV unit.

5. Disconnect the connector PL121, PL123 and thepower wires for the exhaust fan motor from thewiring harness inside the air chamber fo the EnergyX.

6. Remove the fasteners at each corner of the outside airfan that secure the outside air fan front panel to thedividing wall by access through the hood opening ofthe ERV. See Fig. 20.

NOTE: See instructions for removing the wheel andsupply filters if more room is needed to access the outsideair fan through the door for better maneuverability.

7. Remove the four bolts holding the front fan panelonto the rest of the outside air fan assembly.Completely remove this panel from the EVR.

NOTE: Tilt the fan assembly front panel to fit it throughthe hood opening.

8. Pull the outside air fan out through the hood opening.See Fig. 21.

NOTE: Tilt the fan assembly to fit its back panel throughthe opening in the dividing wall.

OutsideAir DamperAccess Panel

MotorizedOutside Air Damper

C11493

Fig. 19 -- Outside Air Motorized Damper Removal

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32

Detail “A” -Outside Air Fan Assembly

Remove Bolts: 4 - Places

Outside Air Fan Assembly,see Detail A(access panelnot shown)

Remove Fasteners: 4 - Places

C11495

Fig. 20 -- Remove Fasteners from Corners of Outside Air Fan Assemble

C11496

Fig. 21 -- Outside Air Fan Removal

EnergyX

33

Exhaust Fan Removal

1. Turn off, lockout and tag--out electrical power to unit.2. Remove the exhaust fan access panel by removing

the seal--tek screws around the perimeter (see Fig.19).

NOTE: Even after all of the screws have been removedfrom the panel it still may be difficult to remove due tothe gasket applied from the original installation. Take carenot to damage the gasket. If damage occurs use9430--2300 gasket to replace before reattaching the panel.

3. Open the door to the EnergyX unit in order to gainaccess to the exhaust fan front panel.

NOTE: See instructions for removing the wheel andexhaust filters if more room is needed to access theexhaust fan front panel.

4. If installed, remove the exhaust motorized damper.5. Remove the fasteners around the perimeter of the

exhaust fan that secure the exhaust fan front panel tothe dividing wall by access through the door of theunit. See Fig. 22.

6. Disconnect connectors PL120 and PL122 as well as thepower wires for the exhaust fan motor from the wiringharness inside the air chamber of the EnergyX unit.

7. Remove the exhaust fan by moving it back and thenout the side of the unit through the exhaust motorizeddamper access panel. See Fig. 23.

Detail “A” -Exhaust Fan Assemblysecured to Dividing Wall

Remove Fasteners: 8 - Places

C11497

Fig. 22 -- Exhaust Fan Assembly -- Fastener Locations

EnergyX

34

Exhaust Fan Assembly

C11498

Fig. 23 -- Exhaust Fan Assembly -- Removal

EnergyX

35

APPENDIX

Appendix A —Certified Dimension Drawings

Appendix B — Exhaust Fan PerformanceCurves

EnergyX Modulating Volume 15--25 Ton Units

Appendix C — Electrical Data:

48HC -- with ERV: Unit Wire/Fuse or HACR BreakerSizing Data

50HC -- with Electric Heat and ERV: Unit Wire/Fuseor HACR Breaker Sizing Data

EnergyX

36

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37

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42

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Fig

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EnergyX

43

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ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11423

Fig

.31

--48

HC

--28

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Gas

Hea

tan

dE

RV

(She

et2

of2)

EnergyX

44

AP

PE

ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11424

Fig

.32

--50

HC

--17

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Ele

ctri

cH

eat

and

ER

V(S

heet

1of

2)

EnergyX

45

AP

PE

ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11425

Fig

.33

--50

HC

--17

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Ele

ctri

cH

eat

and

ER

V(S

heet

2of

2)

EnergyX

46

AP

PE

ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11426

Fig

.34

--50

HC

--20

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Ele

ctri

cH

eat

and

ER

V(S

heet

1of

2)

EnergyX

47

AP

PE

ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11427

Fig

.35

--50

HC

--20

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Ele

ctri

cH

eat

and

ER

V(S

heet

2of

2)

EnergyX

48

AP

PE

ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11428

Fig

.36

--50

HC

--24

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Ele

ctri

cH

eat

and

ER

V(S

heet

1of

2)

EnergyX

49

AP

PE

ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11429

Fig

.37

--50

HC

--24

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Ele

ctri

cH

eat

and

ER

V(S

heet

2of

2)

EnergyX

50

AP

PE

ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11431

Fig

.38

--50

HC

--28

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Ele

ctri

cH

eat

and

ER

V(S

heet

1of

2)

EnergyX

51

AP

PE

ND

IXA

—C

ER

TIF

IED

DIM

EN

SIO

ND

RA

WIN

GS

C11432

Fig

.39

--50

HC

--28

Sing

leZ

one

Ele

ctri

cC

oolin

gw

ith

Ele

ctri

cH

eat

and

ER

V(S

heet

2of

2)

EnergyX

52

APPENDIX B — EXHAUST FAN PERFORMANCE

Many applications that utilize energy recovery incorporateducted return/exhaust air paths. In these applications it isimportant to consider the duct pressure of thereturn/exhaust just as a designer would consider theeffects of the supply duct static pressure on the airflow ofthe rooftop unit itself.

EnergyX Modulating Volume 15--25 Ton Units

The exhaust fan in the Modulated Volume EnergyX unitwill assist the rooftop unit fan in pulling air through the

exhaust/return duct. These exhaust fans are backwardscurved impeller designs which are capable of significantmore static pressure operation than typical forward curvedfan designs. The following exhaust fan performancecurves are provided for additional guidance whenconsidering return/exhaust duct design.

NOTE: If application designs require two separate ducts(one for exhaust air, one for return air) contact yourCarrier Sales Engineer for additional guidance prior tospecification or ordering.

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00

EMP - ECONOMIZER MODE

EMP - ERV MODE

External Static Pressure (in H20)

CFM

C11437

Fig. 26 -- 15 Ton MRT Unit ERV Supply and Exhaust Fan Performance Curves

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00

EMR - ECONOMIZER MODE

EMR - ERV MODE


CFM

C11438

Fig. 27 -- 17.5 Ton MRT Unit ERV Supply and Exhaust Fan Performance Curves

EnergyX

53

00.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00


1000

2000

3000

4000

5000

6000

7000

8000

9000

10000EMS - ECONOMIZER MODE

EMS - ERV MODE C

FM

C11439


00.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00


1000

2000

3000

4000

5000

6000

7000

8000

9000

10000EMT - ECONOMIZER MODE

EMT - ERV MODE

CFM

C11440


EnergyX

54

AP

PE

ND

IXC

—E

LE

CT

RIC

AL

DA

TA

48H

C--

wit

hE

RV

:U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a

48HC

SIZE

NOM.V---Ph---Hz

IFM

TYPE

NOC.O.orUNPWRC.O.

w/PWRDC.O.

w/ERVw/oEconomizer

w/ERVw/Economizer

w/ERVw/oEconomizer

w/ERVw/Economizer

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

17

208/230---3---60

STD

84.4

100

90409

92.2

100

99417

89.2

100

95414

97.0

110

104

422

MED

87.1

100

93426

94.9

110

102

434

91.9

100

99431

99.7

110

107

439

HIGH

91.9

100

99435

99.7

110

107

443

96.7

110

104

440

104.5

125

113

448

460---3---60

STD

42.1

5045

241

45.5

5049

245

44.3

5047

243

47.7

6051

247

MED

43.5

5046

250

46.9

6050

254

45.7

5049

252

49.1

6053

256

HIGH

46.1

5049

254

49.5

6053

258

48.3

6052

256

51.7

6056

260

575---3---60

STD

33.4

4036

191

36.8

4540

195

35.1

4038

193

38.5

4541

197

MED

33.4

4036

191

36.8

4540

195

35.1

4038

193

38.5

4541

197

HIGH

36.2

4539

205

39.6

4543

209

37.9

4541

207

41.3

5045

211

20

208/230---3---60

STD

91.9

100

98456

99.6

125

107

464

96.7

110

103

461

104.4

125

112

469

MED

96.7

110

103

465

104.4

125

112

473

101.5

125

109

470

109.2

125

118

478

HIGH

98.8

125

106

467

106.5

125

115

475

103.6

125

111

472

111.3

125

120

480

460---3---60

STD

43.8

5047

252

47.2

6051

256

46.0

5049

254

49.4

6053

258

MED

46.4

5050

256

49.8

6054

260

48.6

6052

258

52.0

6056

262

HIGH

47.6

6051

257

51.0

6055

261

49.8

6054

259

53.2

6057

263

575---3---60

STD

33.4

4036

193

36.8

4540

197

35.1

4038

195

38.5

4541

199

MED

36.2

4539

207

39.6

4543

211

37.9

4541

209

41.3

5045

213

HIGH

38.2

4541

205

41.6

5045

209

39.9

4543

207

43.3

5047

211

EnergyX

55

AP

PE

ND

IXC

—E

LE

CT

RIC

AL

DA

TA

48H

C--

wit

hE

RV

:U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont)

48HC

SIZE

NOM.V---Ph---Hz

IFM

TYPE

NOC.O.orUNPWRC.O.

w/PWRDC.O.

w/ERVw/oEconomizer

w/ERVw/Economizer

w/ERVw/oEconomizer

w/ERVw/Economizer

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

24

208/230---3---60

STD

121.0

150

131

577

121.0

150

131

577

125.8

150

136

582

125.8

150

136

582

MED

123.1

150

133

579

123.1

150

133

579

127.9

150

138

584

127.9

150

138

584

HIGH

134.5

150

146

658

134.5

150

146

658

139.3

150

152

663

139.3

150

152

663

460---3---60

STD

62.7

7067

292

62.7

7067

292

64.9

8070

294

64.9

8070

294

MED

63.9

8069

293

63.9

8069

293

66.1

8071

295

66.1

8071

295

HIGH

69.6

8075

333

69.6

8075

333

71.8

8078

335

71.8

8078

335

575---3---60

STD

49.6

6054

219

49.6

6054

219

51.3

6055

221

51.3

6055

221

MED

51.6

6056

217

51.6

6056

217

53.3

6058

219

53.3

6058

219

HIGH

53.5

6058

244

53.5

6058

244

55.2

6060

246

55.2

6060

246

28

208/230---3---60

STD

149.7

175

158

617

149.7

175

158

617

154.5

200

164

622

154.5

200

164

622

MED

151.8

175

161

619

151.8

175

161

619

156.6

200

166

624

156.6

200

166

624

HIGH

163.2

200

174

698

163.2

200

174

698

168.0

200

179

703

168.0

200

179

703

460---3---60

STD

68.1

8073

318

68.1

8073

318

70.3

8076

320

70.3

8076

320

MED

69.3

8074

319

69.3

8074

319

71.5

9077

321

71.5

9077

321

HIGH

75.0

9081

359

75.0

9081

359

77.2

9083

361

77.2

9083

361

575---3---60

STD

54.5

6058

243

54.5

6058

243

56.2

6060

245

56.2

6060

245

MED

56.5

7061

241

56.5

7061

241

58.2

7063

243

58.2

7063

243

HIGH

58.4

7063

268

58.4

7063

268

60.1

7065

270

60.1

7065

270

EnergyX

56

AP

PE

ND

IXC

—E

LE

CT

RIC

AL

DA

TA

50H

C--

Wit

hE

lect

ric

Hea

tan

dE

RV

:U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a

50HC

SIZE

NOM.V---Ph---Hz

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER

Nom(kW)

FLA

w/ERVw/oEconomizer

w/ERVw/Economizer

w/ERVw/oEconomizer

w/ERVw/Economizer

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

17

208/230---3---60

STD

NONE

------

84.4

100

90409

92.2

100

99417

89.2

100

95414

97.0

110

104

422

279A00

18.8/25.0

52.1/60.1

94.7/104.7

100/110

90/96

409/409

104.4/114.4

110/125

99/105

417/417

100.7/110.7

110/125

95/102

414/414

110.4/120.4

125/125

104/111

422/422

280A00

37.6/50.0

104.2/120.3

159.8/149.9

175/175

147/166

409/409

169.6/159.6

175/175

156/175

417/417

165.8/155.9

175/175

153/171

414/414

175.6/165.6

200/175

162/180

422/422

281A00

56.3/75.0

156.4/180.4

186.0/210.0

200/225

207/235

409/409

195.7/219.7

200/225

216/244

417/417

192.0/216.0

200/225

213/240

414/414

201.7/225.7

225/250

222/249

422/422

MED

NONE

------

87.1

100

93426

94.9

110

102

434

91.9

100

99431

99.7

110

107

439

279A00

18.8/25.0

52.1/60.1

98.1/108.1

100/110

93/99

426/426

107.8/117.8

110/125

102/108

434/434

104.1/114.1

110/125

99/105

431/431

113.8/123.8

125/125

107/114

439/439

280A00

37.6/50.0

104.2/120.3

163.2/153.3

175/175

150/169

426/426

172.9/163.0

175/175

159/178

434/434

169.2/159.3

175/175

156/174

431/431

178.9/169.0

200/175

165/183

439/439

281A00

56.3/75.0

156.4/180.4

189.4/213.4

200/225

210/238

426/426

199.1/223.1

200/250

219/247

434/434

195.4/219.4

200/225

216/243

431/431

205.1/229.1

225/250

225/252

439/439

HIGH

NONE

------

91.9

100

99435

99.7

110

107

443

96.7

110

104

440

104.5

125

113

448

279A00

18.8/25.0

52.1/60.1

104.1/114.1

110/125

99/105

435/435

113.8/123.8

125/125

107/114

443/443

110.1/120.1

125/125

104/110

440/440

119.8/129.8

125/150

113/119

448/448

280A00

37.6/50.0

104.2/120.3

169.2/159.3

175/175

156/174

435/435

178.9/169.0

200/175

165/183

443/443

175.2/165.3

200/175

161/180

440/440

184.9/175.0

200/175

170/189

448/448

281A00

56.3/75.0

156.4/180.4

195.4/219.4

200/250

216/243

435/435

205.1/229.1

225/250

225/252

443/443

201.4/225.4

225/250

221/249

440/440

211.1/235.1

225/250

230/258

448/448

460---3---60

STD

NONE

------

42.1

5045

241

45.5

5049

245

44.3

5047

243

47.7

6051

247

282A00

25.0

30.1

50.8

6047

241

55.1

6051

245

53.6

6049

243

57.8

6053

247

283A00

50.0

60.1

73.3

8081

241

77.5

8085

245

76.1

8084

243

80.3

9088

247

284A00

75.0

90.2

103.4

110

116

241

107.6

110

120

245

106.2

110

118

243

110.4

125

122

247

MED

NONE

------

43.5

5046

250

46.9

6050

254

45.7

5049

252

49.1

6053

256

282A00

25.0

30.1

52.6

6048

250

56.8

6052

254

55.3

6051

252

59.6

6055

256

283A00

50.0

60.1

75.1

8083

250

79.3

8087

254

77.8

8085

252

82.0

9089

256

284A00

75.0

90.2

105.2

110

117

250

109.4

125

121

254

107.9

125

120

252

112.1

125

124

256

HIGH

NONE

------

46.1

5049

254

49.5

6053

258

48.3

6052

256

51.7

6056

260

282A00

25.0

30.1

55.8

6051

254

60.1

7055

258

58.6

6054

256

62.8

7058

260

283A00

50.0

60.1

78.3

8086

254

82.5

9090

258

81.1

9088

256

85.3

9092

260

284A00

75.0

90.2

108.4

125

120

254

112.6

125

124

258

111.2

125

123

256

115.4

125

127

260

575---3---60

STD

NONE

------

33.4

4036

191

36.8

4540

195

35.1

4038

193

38.5

4541

197

285A00

24.8

23.9

42.3

4539

191

46.6

5043

195

44.5

4541

193

48.7

5045

197

286A00

49.6

47.7

72.1

8066

191

76.3

8070

195

74.2

8068

193

78.4

8072

197

287A00

74.4

71.6

84.1

9094

191

88.3

9098

195

86.2

9096

193

90.4

100

100

197

MED

NONE

------

33.4

4036

191

36.8

4540

195

35.1

4038

193

38.5

4541

197

285A00

24.8

23.9

42.3

4539

191

46.6

5043

195

44.5

4541

193

48.7

5045

197

286A00

49.6

47.7

72.1

8066

191

76.3

8070

195

74.2

8068

193

78.4

8072

197

287A00

74.4

71.6

84.1

9094

191

88.3

9098

195

86.2

9096

193

90.4

100

100

197

HIGH

NONE

------

36.2

4539

205

39.6

4543

209

37.9

4541

207

41.3

5045

211

285A00

24.8

23.9

45.8

5042

205

50.1

6046

209

48.0

5044

207

52.2

6048

211

286A00

49.6

47.7

75.6

8070

205

79.8

8073

209

77.7

8071

207

81.9

9075

211

287A00

74.4

71.6

87.6

9097

205

91.8

100

101

209

89.7

9099

207

93.9

100

103

211

EnergyX

57

AP

PE

ND

IXC

—E

LE

CT

RIC

AL

DA

TA

50H

C--

Wit

hE

lect

ric

Hea

tan

dE

RV

:U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont.

)

50HC

SIZE

NOM.V---Ph---Hz

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER

Nom(kW)

FLA

w/ERVw/oEconomizer

w/ERVw/Economizer

w/ERVw/oEconomizer

w/ERVw/Economizer

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

20

208/230---3---60

STD

NONE

------

91.9

100

98456

99.6

125

107

464

96.7

110

103

461

104.4

125

112

469

279A00

18.8/25.0

52.1/60.1

98.1/108.1

100/110

98/99

456/456

107.8/117.8

125/125

107/108

464/464

104.1/114.1

110/125

103/105

461/461

113.8/123.8

125/125

112/114

469/469

280A00

37.6/50.0

104.2/120.3

163.2/153.3

175/175

150/169

456/456

172.9/163.0

175/175

159/178

464/464

169.2/159.3

175/175

156/174

461/461

178.9/169.0

200/175

165/183

469/469

281A00

56.3/75.0

156.4/180.4

189.4/213.4

200/225

210/238

456/456

199.1/223.1

200/250

219/247

464/464

195.4/219.4

200/225

216/243

461/461

205.1/229.1

225/250

225/252

469/469

MED

NONE

------

96.7

110

103

465

104.4

125

112

473

101.5

125

109

470

109.2

125

118

478

279A00

18.8/25.0

52.1/60.1

104.1/114.1

110/125

103/105

465/465

113.8/123.8

125/125

112/114

473/473

110.1/120.1

125/125

109/110

470/470

119.8/129.8

125/150

118/119

478/478

280A00

37.6/50.0

104.2/120.3

169.2/159.3

175/175

156/174

465/465

178.9/169.0

200/175

165/183

473/473

175.2/165.3

200/175

161/180

470/470

184.9/175.0

200/175

170/189

478/478

281A00

56.3/75.0

156.4/180.4

195.4/219.4

200/250

216/243

465/465

205.1/229.1

225/250

225/252

473/473

201.4/225.4

225/250

221/249

470/470

211.1/235.1

225/250

230/258

478/478

HIIGH

NONE

------

98.8

125

106

467

106.5

125

115

475

103.6

125

111

472

111.3

125

120

480

279A00

18.8/25.0

52.1/60.1

106.7/116.7

125/125

106/107

467/467

116.4/126.4

125/150

115/116

475/475

112.7/122.7

125/125

111/113

472/472

122.4/132.4

125/150

120/122

480/480

280A00

37.6/50.0

104.2/120.3

171.8/161.9

175/175

158/177

467/467

181.6/171.6

200/175

167/186

475/475

177.8/167.9

200/175

164/182

472/472

187.6/177.6

200/200

173/191

480/480

281A00

56.3/75.0

156.4/180.4

198.0/222.0

200/250

218/246

467/467

207.7/231.7

225/250

227/255

475/475

204.0/228.0

225/250

224/251

472/472

213.7/237.7

225/250

233/260

480/480

460---3---60

STD

NONE

------

43.8

5047

252

47.2

6051

256

46.0

5049

254

49.4

6053

258

282A00

25.0

30.1

52.6

6048

252

56.8

6052

256

55.3

6051

254

59.6

6055

258

283A00

50.0

60.1

75.1

8083

252

79.3

8087

256

77.8

8085

254

82.0

9089

258

284A00

75.0

90.2

105.2

110

117

252

109.4

125

121

256

107.9

125

120

254

112.1

125

124

258

MED

NONE

------

46.4

5050

256

49.8

6054

260

48.6

6052

258

52.0

6056

262

282A00

25.0

30.1

55.8

6051

256

60.1

7055

260

58.6

6054

258

62.8

7058

262

283A00

50.0

60.1

78.3

8086

256

82.5

9090

260

81.1

9088

258

85.3

9092

262

284A00

75.0

90.2

108.4

125

120

256

112.6

125

124

260

111.2

125

123

258

115.4

125

127

262

HIGH

NONE

------

47.6

6051

257

51.0

6055

261

49.8

6054

259

53.2

6057

263

282A00

25.0

30.1

57.3

6053

257

61.6

7057

261

60.1

7055

259

64.3

7059

263

283A00

50.0

60.1

79.8

9087

257

84.0

9091

261

82.6

9090

259

86.8

9094

263

284A00

75.0

90.2

109.9

125

122

257

114.1

125

126

261

112.7

125

124

259

116.9

125

128

263

575---3---60

STD

NONE

------

33.4

4036

193

36.8

4540

197

35.1

4038

195

38.5

4541

199

285A00

24.8

23.9

42.3

4539

193

46.6

5043

197

44.5

4541

195

48.7

5045

199

286A00

49.6

47.7

72.1

8066

193

76.3

8070

197

74.2

8068

195

78.4

8072

199

287A00

74.4

71.6

84.1

9094

193

88.3

9098

197

86.2

9096

195

90.4

100

100

199

MED

NONE

------

36.2

4539

207

39.6

4543

211

37.9

4541

209

41.3

5045

213

285A00

24.8

23.9

45.8

5042

207

50.1

6046

211

48.0

5044

209

52.2

6048

213

286A00

49.6

47.7

75.6

8070

207

79.8

8073

211

77.7

8071

209

81.9

9075

213

287A00

74.4

71.6

87.6

9097

207

91.8

100

101

211

89.7

9099

209

93.9

100

103

213

HIGH

NONE

------

38.2

4541

205

41.6

5045

209

39.9

4543

207

43.3

5047

211

285A00

24.8

23.9

48.3

5044

205

52.6

6048

209

50.5

6046

207

54.7

6050

211

286A00

49.6

47.7

78.1

8072

205

82.3

9076

209

80.2

9074

207

84.4

9078

211

287A00

74.4

71.6

90.1

100

99205

94.3

100

103

209

92.2

100

101

207

96.4

100

105

211

EnergyX

58

AP

PE

ND

IXC

—E

LE

CT

RIC

AL

DA

TA

50H

C--

Wit

hE

lect

ric

Hea

tan

dE

RV

:U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont.

)

50HC

SIZE

NOM.V---Ph---Hz

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER

Nom(kW)

FLA

w/ERVw/oEconomizer

w/ERVw/Economizer

w/ERVw/oEconomizer

w/ERVw/Economizer

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

24

208/230---3---60

STD

NONE

------

121.0

150

131

577

121.0

150

131

577

125.8

150

136

582

125.8

150

136

582

279A00

18.8/25.0

52.1/60.1

124.3/134.3

150/150

131/131

577/577

124.3/134.3

150/150

131/131

577/577

130.3/140.3

150/150

136/136

582/582

130.3/140.3

150/150

136/136

582/582

280A00

37.6/50.0

104.2/120.3

189.4/179.5

200/200

174/193

577/577

189.4/179.5

200/200

174/193

577/577

195.4/185.5

200/200

180/198

582/582

195.4/185.5

200/200

180/198

582/582

281A00

56.3/75.0

156.4/180.4

215.6/239.6

225/250

234/262

577/577

215.6/239.6

225/250

234/262

577/577

221.6/245.6

225/250

240/267

582/582

221.6/245.6

225/250

240/267

582/582

MED

NONE

------

123.1

150

133

579

123.1

150

133

579

127.9

150

138

584

127.9

150

138

584

279A00

18.8/25.0

52.1/60.1

126.9/136.9

150/150

133/133

579/579

126.9/136.9

150/150

133/133

579/579

132.9/142.9

150/150

138/138

584/584

132.9/142.9

150/150

138/138

584/584

280A00

37.6/50.0

104.2/120.3

192.0/182.1

200/200

177/195

579/579

192.0/182.1

200/200

177/195

579/579

198.0/188.1

200/200

182/201

584/584

198.0/188.1

200/200

182/201

584/584

281A00

56.3/75.0

156.4/180.4

218.2/242.2

225/250

237/264

579/579

218.2/242.2

225/250

237/264

579/579

224.2/248.2

225/250

242/270

584/584

224.2/248.2

225/250

242/270

584/584

HIGH

NONE

------

134.5

150

146

658

134.5

150

146

658

139.3

150

152

663

139.3

150

152

663

279A00

18.8/25.0

52.1/60.1

141.2/151.2

150/175

146/146

658/658

141.2/151.2

150/175

146/146

658/658

147.2/157.2

150/175

152/152

663/663

147.2/157.2

150/175

152/152

663/663

280A00

37.6/50.0

104.2/120.3

206.3/196.3

225/200

190/208

658/658

206.3/196.3

225/200

190/208

658/658

212.3/202.3

225/225

195/214

663/663

212.3/202.3

225/225

195/214

663/663

281A00

56.3/75.0

156.4/180.4

232.4/256.4

250/300

250/277

658/658

232.4/256.4

250/300

250/277

658/658

238.4/262.4

250/300

255/283

663/663

238.4/262.4

250/300

255/283

663/663

460---3---60

STD

NONE

------

62.7

7067

292

62.7

7067

292

64.9

8070

294

64.9

8070

294

282A00

25.0

30.1

64.6

7067

292

64.6

7067

292

67.3

8070

294

67.3

8070

294

283A00

50.0

60.1

87.1

9094

292

87.1

9094

292

89.8

9096

294

89.8

9096

294

284A00

75.0

90.2

117.2

125

129

292

117.2

125

129

292

119.9

125

131

294

119.9

125

131

294

MED

NONE

------

63.9

8069

293

63.9

8069

293

66.1

8071

295

66.1

8071

295

282A00

25.0

30.1

66.1

8069

293

66.1

8069

293

68.8

8071

295

68.8

8071

295

283A00

50.0

60.1

88.6

9095

293

88.6

9095

293

91.3

100

98295

91.3

100

98295

284A00

75.0

90.2

118.7

125

130

293

118.7

125

130

293

121.4

125

132

295

121.4

125

132

295

HIGH

NONE

------

69.6

8075

333

69.6

8075

333

71.8

8078

335

71.8

8078

335

282A00

25.0

30.1

73.2

8075

333

73.2

8075

333

76.0

8078

335

76.0

8078

335

283A00

50.0

60.1

95.7

100

102

333

95.7

100

102

333

98.4

100

104

335

98.4

100

104

335

284A00

75.0

90.2

125.8

150

136

333

125.8

150

136

333

128.5

150

139

335

128.5

150

139

335

575---3---60

STD

NONE

------

49.6

6054

219

49.6

6054

219

51.3

6055

221

51.3

6055

221

285A00

24.8

23.9

54.6

6054

219

54.6

6054

219

56.7

6055

221

56.7

6055

221

286A00

49.6

47.7

84.3

9078

219

84.3

9078

219

86.5

9080

221

86.5

9080

221

287A00

74.4

71.6

96.3

100

105

219

96.3

100

105

219

98.4

100

107

221

98.4

100

107

221

MED

NONE

------

51.6

6056

217

51.6

6056

217

53.3

6058

219

53.3

6058

219

285A00

24.8

23.9

57.1

6056

217

57.1

6056

217

59.2

6058

219

59.2

6058

219

286A00

49.6

47.7

86.8

9080

217

86.8

9080

217

89.0

9082

219

89.0

9082

219

287A00

74.4

71.6

98.8

100

107

217

98.8

100

107

217

100.9

110

109

219

100.9

110

109

219

HIGH

NONE

------

53.5

6058

244

53.5

6058

244

55.2

6060

246

55.2

6060

246

285A00

24.8

23.9

59.5

6058

244

59.5

6058

244

61.6

7060

246

61.6

7060

246

286A00

49.6

47.7

89.2

9082

244

89.2

9082

244

91.3

100

84246

91.3

100

84246

287A00

74.4

71.6

101.2

110

110

244

101.2

110

110

244

103.3

110

112

246

103.3

110

112

246

EnergyX

59

AP

PE

ND

IXC

—E

LE

CT

RIC

AL

DA

TA

50H

C--

Wit

hE

lect

ric

Hea

tan

dE

RV

:U

nit

Wir

e/F

use

orH

AC

RB

reak

erSi

zing

Dat

a(c

ont.

)

50HC

SIZE

NOM.V---Ph---Hz

IFM

TYPE

ELEC.HTR

NOC.O.orUNPWRC.O.

w/PWRDC.O.

CRHEATER

Nom(kW)

FLA

w/ERVw/oEconomizer

w/ERVw/Economizer

w/ERVw/oEconomizer

w/ERVw/Economizer

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

MCA

FUSE

orHACR

BRKR

DISC.SIZE

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

28

208/230---3---60

STD

NONE

------

149.7

175

158

617

149.7

175

158

617

154.5

200

164

622

154.5

200

164

622

279A00

18.8/25.0

52.1/60.1

149.7/149.7

175/175

158/158

617/617

149.7/149.7

175/175

158/158

617/617

154.5/154.5

200/200

164/164

622/622

154.5/154.5

200/200

164/164

622/622

280A00

37.6/50.0

104.2/120.3

189.4/179.5

200/200

174/193

617/617

189.4/179.5

200/200

174/193

617/617

195.4/185.5

200/200

180/198

622/622

195.4/185.5

200/200

180/198

622/622

281A00

56.3/75.0

156.4/180.4

215.6/239.6

225/250

234/262

617/617

215.6/239.6

225/250

234/262

617/617

221.6/245.6

225/250

240/267

622/622

221.6/245.6

225/250

240/267

622/622

MED

NONE

------

151.8

175

161

619

151.8

175

161

619

156.6

200

166

624

156.6

200

166

624

279A00

18.8/25.0

52.1/60.1

151.8/151.8

175/175

161/161

619/619

151.8/151.8

175/175

161/161

619/619

156.6/156.6

200/200

166/166

624/624

156.6/156.6

200/200

166/166

624/624

280A00

37.6/50.0

104.2/120.3

192.0/182.1

200/200

177/195

619/619

192.0/182.1

200/200

177/195

619/619

198.0/188.1

200/200

182/201

624/624

198.0/188.1

200/200

182/201

624/624

281A00

56.3/75.0

156.4/180.4

218.2/242.2

225/250

237/264

619/619

218.2/242.2

225/250

237/264

619/619

224.2/248.2

225/250

242/270

624/624

224.2/248.2

225/250

242/270

624/624

HIGH

NONE

------

163.2

200

174

698

163.2

200

174

698

168.0

200

179

703

168.0

200

179

703

279A00

18.8/25.0

52.1/60.1

163.2/163.2

200/200

174/174

698/698

163.2/163.2

200/200

174/174

698/698

168.0/168.0

200/200

179/179

703/703

168.0/168.0

200/200

179/179

703/703

280A00

37.6/50.0

104.2/120.3

206.3/196.3

225/200

190/208

698/698

206.3/196.3

225/200

190/208

698/698

212.3/202.3

225/225

195/214

703/703

212.3/202.3

225/225

195/214

703/703

281A00

56.3/75.0

156.4/180.4

232.4/256.4

250/300

250/277

698/698

232.4/256.4

250/300

250/277

698/698

238.4/262.4

250/300

255/283

703/703

238.4/262.4

250/300

255/283

703/703

460---3---60

STD

NONE

------

68.1

8073

318

68.1

8073

318

70.3

8076

320

70.3

8076

320

282A00

25.0

30.1

68.1

8073

318

68.1

8073

318

70.3

8076

320

70.3

8076

320

283A00

50.0

60.1

87.1

9094

318

87.1

9094

318

89.8

9096

320

89.8

9096

320

284A00

75.0

90.2

117.2

125

129

318

117.2

125

129

318

119.9

125

131

320

119.9

125

131

320

MED

NONE

------

69.3

8074

319

69.3

8074

319

71.5

9077

321

71.5

9077

321

282A00

25.0

30.1

69.3

8074

319

69.3

8074

319

71.5

9077

321

71.5

9077

321

283A00

50.0

60.1

88.6

9095

319

88.6

9095

319

91.3

100

98321

91.3

100

98321

284A00

75.0

90.2

118.7

125

130

319

118.7

125

130

319

121.4

125

132

321

121.4

125

132

321

HIGH

NONE

------

75.0

9081

359

75.0

9081

359

77.2

9083

361

77.2

9083

361

282A00

25.0

30.1

75.0

9081

359

75.0

9081

359

77.2

9083

361

77.2

9083

361

283A00

50.0

60.1

95.7

100

102

359

95.7

100

102

359

98.4

100

104

361

98.4

100

104

361

284A00

75.0

90.2

125.8

150

136

359

125.8

150

136

359

128.5

150

139

361

128.5

150

139

361

575---3---60

STD

NONE

------

54.5

6058

243

54.5

6058

243

56.2

6060

245

56.2

6060

245

285A00

24.8

23.9

54.6

6058

243

54.6

6058

243

56.7

6060

245

56.7

6060

245

286A00

49.6

47.7

84.3

9078

243

84.3

9078

243

86.5

9080

245

86.5

9080

245

287A00

74.4

71.6

96.3

100

105

243

96.3

100

105

243

98.4

100

107

245

98.4

100

107

245

MED

NONE

------

56.5

7061

241

56.5

7061

241

58.2

7063

243

58.2

7063

243

285A00

24.8

23.9

57.1

7061

241

57.1

7061

241

59.2

7063

243

59.2

7063

243

286A00

49.6

47.7

86.8

9080

241

86.8

9080

241

89.0

9082

243

89.0

9082

243

287A00

74.4

71.6

98.8

100

107

241

98.8

100

107

241

100.9

110

109

243

100.9

110

109

243

HIGH

NONE

------

58.4

7063

268

58.4

7063

268

60.1

7065

270

60.1

7065

270

285A00

24.8

23.9

59.5

7063

268

59.5

7063

268

61.6

7065

270

61.6

7065

270

286A00

49.6

47.7

89.2

9082

268

89.2

9082

268

91.3

100

84270

91.3

100

84270

287A00

74.4

71.6

101.2

110

110

268

101.2

110

110

268

103.3

110

112

270

103.3

110

112

270

EnergyX

6060

Copyright 2011 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 11/11

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: ERV1---01SI

Replaces: New

EnergyX

61

ENERGYX UNIT START-UP CHECKLIST(To be used in conjunction with base Rooftop Unit Start--Up Checklist. Remove and Store in Job File)

RTU MODEL NO.: RTU SERIAL NO.:

ERV MODEL NO.: ERV SERIAL NO.:

DATE: TECHNICIAN:

I. PRE-START-UP (insert checkmark in box as each item is completed)

j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT

j VERIFY INSTALLATION OF OUTDOOR AIR HOODS

j CHECK THAT AIR FILTERS ARE CLEAN AND IN PLACE ON SUPPLY AND EXHAUST OF ERV WHEEL

j CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE

j VERIFY CONFIGURAITON VALUES FOR ELECTRONIC CONTROLS

II. START-UP (REFER TO UNIT SERVICE/MAINTENANCE MANUAL FOR START--UPINSTRUCTIONS)

ELECTRICAL

SUPPLY VOLTAGE* L1-L2 L2-L3 L3-L1

ERV SUPPLY FAN--1 AMPS L1-L2 L2-L3 L3-L1

ERV SUPPLY FAN--2 AMPS L1-L2 L2-L3 L3-L1

ERV EXHAUST FAN--1 AMPS L1-L2 L2-L3 L3-L1

ERV EXHAUST FAN--2 AMPS L1-L2 L2-L3 L3-L1

*Distribution Block on 575v units will be 460v

TEMPERATURES

OUTDOOR-AIR TEMPERATURE (OAT) F dB (Dry Bulb)

RETURN-AIR TEMPERATURE (SPT or RAT) F dB/F wB (Dry Bulb/Wet Bulb)

ERV INTAKE LEAVING AIR TEMPERATURE (LAT) F

ERV EXHAUST AIR TEMPERATURE (EXAT) F

GENERAL

j COMFORTLINK MINIMUM DAMPER POSITION SET TO “0”

j ERV MINIMUM VENTILATION POSITION PER JOB REQUIREMENTS

j VERIFY ENERGY RECOVERY WHEEL IS ROTATING

j VERIFY SUPPLY AND EXHAUST BLOWER FANS ROTATING IN PROPER DIRECTION

j VERIFY ALL EXTERNAL PANELS FULLY SHUT AND LATCHED

j VERIFY NO ACTIVE ALARMS

j FOLLOW ALL ACCESSORY START--UP PROCEDURES

III. CONFIGURATION (Used in conjunction with Base Unit start--up configurations)

Minimum DCV Outside Air CFM (DCV.M)

Minimum Outside Air CFM (OA.MN)

Exhaust Air Offset CFM (PE.OF)

Building Pressure Setpoint (BP.SP)

Frost Protection Dial Setpoint

EnergyX

62

Copyright 2011 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 11/11

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: ERV1---01SI

Replaces: New

EnergyX

Supplemental Installation Instructions...have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local

Documents