Trane GER-036, GER-048, GER-060, GER-072, GER-090 Installation and Maintenance Manual

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Installation, Operation, and Maintenance

Water-Source Comfort System

Axiom™ Rooftop

Models 60HZ

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and airconditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

August 2013

“E” and later Design Sequence GER -036, -048, -060, -072, -090, -120, -150, -180, -240,-300

SAFETY WARNING

WSHP-SVX12B-EN

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Warnings, Cautions and Notices

Warnings, Cautions and Notices. Note that warnings,

cautions and notices appear at appropriate intervals throughout this manual. Warnings are provide to alert installing contractors to potentialhazards that could result in death or personal injury. Cautions are designed to alert personnel to hazardous situations that could result in personal injury, while notices indicate a situation that could result in equipment or property-damage-only accidents.

Your personal safety and the proper operation of this

machine depend upon the strict observance of these precautions.

Read this manual thoroughlybefore operatingor servicing this unit.

ATTENTION: Warnings, Cautions, and Notices appear at

appropriate sections throughout this literature. Read these carefully:

WARNING

CAUTIONs

NOTICE:

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.

Indicates a situation that couldresult in equipment or property-damage only accidents.

Important Environmental Concerns!

Scientific research has shown that certain man-made chemicals can affect the earth’s naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment.Trane advocates the responsible handlingof all refrigerants-including industry replacements for CFCs such as HCFCs and HFCs.

Responsible Refrigerant Practices!

Trane believes that responsible refrigerant practices are

important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified.The Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or

municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.

WARNING

Proper Field Wiring and Grounding Required!

All field wiring MUST be performed by qualified

personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards.To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Failure to follow code could result in death or serious injury.

WARNING

Personal Protective Equipment (PPE) Required!

Installing/servicing this unit could result in exposure to electrical, mechanical and chemical hazards.

• Before installing/servicing this unit, technicians MUST put on all Personal ProtectiveEquipment (PPE) recommended for the work being undertaken.

ALWAYSreferto appropriate MSDS sheets and OSHA

guidelines for proper PPE.

• When working with or around hazardous chemicals,

ALWAYS refer to the appropriate MSDS sheets and

OSHA guidelines for information on allowable personal exposure levels, proper respiratory protection and handling recommendations.

• If there is a risk of arc or flash, technicians MUST put on all Personal Protective Equipment (PPE) in accordance with NFPA 70E or other country-specific requirements for arc flash protection, PRIOR to servicing the unit.

Failure to follow recommendations could result in death or serious injury.

WARNING

Contains Refrigerant!

System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system. See unit nameplate for refrigerant type. Do not use non-approved refrigerants, refrigerant substitutes, or refrigerant additives.

Failure to follow proper procedures or the use of nonapproved refrigerants, refrigerant substitutes, or refrigerant additives could result in death or serious injury or equipment damage.

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WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/ tagout procedures to ensure the power cannot be inadvertently energized. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

WARNING

Fiberglass Wool!

Product contains fiberglass wool. Disturbing the insulation in this product during installation, maintenance or repair will expose you to airborne particles of glass wool fibers and ceramic fibers known to the state of California to cause cancer through inhalation. Glass wool fibers may also cause respiratory, skin or eye irritation.

Warnings, Cautions and Notices

Introduction

Revision Summary.

WSHP-SVX12B-EN

Corrected dimensions and added center of gravity information.

Trademarks

Axiom, Precedent, ReliaTel,TOPSS,Tracer, Voyager II,

Trane, and theTrane logo are trademarks or registered

trademarks ofTrane in the United States and other countries.Trane is a business of Ingersoll Rand. All trademarks referenced in this document are the trademarks of their respective owners.

LonTalk is a registered trademark of Echelon Corporation.

NOTICE:

Equipment Damage From Ultraviolet (UV) Lights!

The manufacturer does not recommend field

installation of ultraviolet lights in its equipment for the intended purpose of improving indoor air quality. High intensity C-band ultraviolet light is known to severely damage polymer (plastic) materials and poses a personal safety risk to anyone exposed to the light without proper personal protective equipment. Polymer materials commonly found in HVAC equipment that may be susceptible include insulation on electrical wiring, fan belts, thermal insulation, various fasteners and bushings. Degradation of these materials can result in serious damage to the equipment.

The manufacturer accepts no responsibility for the

performance or operation of our equipment in which ultraviolet devices were installed outside of the manufacturer’s factory or its approved suppliers.

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Table of Contents

Warnings, Cautions and Notices .......... 2

Introduction ........................ 3

Model Number Descriptions .............. 5

General Information ..................... 6

Jobsite Inspection ................... 6

Jobsite Storage ..................... 6

Unit Description ..................... 6

System Input Devices and Functions .... 6

Field installed ONLY Accessories ....... 8

Component Location ................. 9

Dimensions ............................ 10

Unit Clearances .................... 10

Installation ............................. 30

General Installation Checks ........... 30

Main Electrical Power Requirements . . . 30

Foundation for Rooftop Units ......... 30

Ductwork .......................... 31

Roof Curbs ........................ 31

Rigging the Unit .................... 31

Supply/Return Pipe ................. 31

Drain Connection ................... 32

Horizontal Discharge Conversion ...... 32

TCO-A Instructions .................. 33

Field Installed Power Wiring .......... 34

Field Installed Control Wiring ......... 34

Control Power Transformer ........... 34

Standard Warranty ...................58

Extended Warranty ..................58

Electrical Requirements ................. 38

Pre-Start ............................... 45

Space Temperature Averaging ........ 45

Test Modes ........................ 47

Pre-Startup Checklist ................ 52

Start Up ............................... 53

Initial Unit Start-up .................. 53

Water Pressure Drop ................ 54

Maintenance ........................... 55

Preventive Maintenance ............. 55

Troubleshooting ........................ 56

Warranty ............................... 58

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Model Number Descriptions

G E R E 060 1 1 A 0 1 1 0 D 0 T 0 A 6 0 0 1 1 0 A 0 B 0 0 0 0 0 000

1 2 3 4 5,6,7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30-36

Digits 1-3 — Unit Configuration

GER= High Efficiency Rooftop

Digit 4 — Development

Sequence

Digits 5-7 — Nominal Size (MBH)

036 = 3Ton 048 = 4Ton 060 = 5Ton 072 = 6Ton 090 = 7 1/2Ton 120 = 10 Ton 150 = 12 1/2Ton 180 = 15 Ton 240 = 20Ton 300 = 25Ton

Digit 8 — Voltage (Volts/Hz/ Phase)

1 = 208/60/1 2 = 230/60/1 3 = 208/60/3 4 = 460/60/3 5 = 575/60/3 8 = 230/60/3

Digit 9 — Heat Exchanger

1 = Copper Water Coil 2 = Cupro-nickel Water Coil

Digit 10 — Design Sequence

Most Up-to-Date Design

Digit 11 — Refrigeration Circuit

0 = Heating and Cooling Circuit A = Cooling ONLY Circuit

Digit 12 — Blower Configuration

1 = Standard Blower 2 = Oversized Blower Motor

Digit 13 — Freeze Protection

A = 20 Degree Freezestat B/T B = 30 Degree Freezestat B/T

Digit 14 — Open Digit

0 = Standard Design S = Design Special

Digit 15 — Supply-Air

Arrangement

D = Down-Flow Supply-Air

Arrangement

(convertible for3-10Ton)

H = Horizontal Supply-Air

Arrangement

(12 1/2 - 25Ton option)

DIGIT 16 — Return-Air

Arrangement

0 = Standard Return-Air Arrangement

Digit 17 — Control Types

R = ReliaTel™ Standalone Controls

T = Tracer™ Communication

Interface

L = LonTalk™ Communication

Interface

Digit 18 — T’stat/Sensor

Location

0 = Wall Mounted Location A = Wall Mounted Sensor with Unit

Mounted Return-Air Smoke Detector

B = Wall Mounted Sensor with Unit

Mounted Supply-Air Smoke Detector

C = Wall Mounted Sensor with Unit

Mounted Return-Air/Supply-Air Smoke Detectors

Digit 19 — Fault Sensors

0 = No Fault Sensor A = Clogged Filter Switch B = Fan Failure Switch C = Discharge Air SensingTube D = Clogged Filter Switch and Fan Fail

Switch

E = Clogged Filter Switch and

Discharge Air Sensing Tube

F = Fan Fail Switch and Discharge Air

SensingTube

G = Clogged Filter Switch, Fan Fail

Switch and DA SensingTube

Digit 20 — Temperature Sensor

7 = High Pressure Control/Frostat/

Crankcase Heater

Digit 21 — Night Setback

0 = No Night Setback Relay N = Night Setback Relay

Note: Option N is used for the Micro

Standalone Controller ONLY.

Digit 22 — Electric Heat Option

0 = No Electric Heat A = 5 kW (1-Phase) B = 6 kW (3-Phase) C = 9 kW (3-Phase) D = 10 kW (1-Phase) E = 12 kW (3-Phase) F = 14 kW (1-Phase) G = 18 kW (1 and 3-Phase) J = 23 kW (3-Phase) K = 27 kW (3-Phase) N = 36 kW (3-Phase) P = 54 kW (3-Phase)

Digit 23 — Unit Mounted

Disconnect

0 = No Unit Mounted Disconnect 1 = Non-Fused Disconnect 2 = Circuit Breaker

Digit 24 — FilterType

2 = 2" Throwaway Filter 4 = 2" MERV 8 Filter 5 = 2" MERV 13 Filter

Digit 25 — Acoustic

Arrangement

0 = Sound Attenuation Package

Digit 26 — Factory Configuration

0 = Standard Factory Configuration A = Hinged Access Panels

Digit 27 — Paint Color

0 = No Paint Selection Available

Digit 28 — Outside Air Option

0 = No Outside Air A = Manual Outside Air Damper

0-25%

B = Motorized Outside Air Damper

0-50%

C = Economizer, Dry Bulb 0-100%

without Barometric Relief

D = Economizer, Dry Bulb 0-100%

with Barometric Relief

E = Economizer, Reference Enthalpy

0-100% without Barometric Relief F = Economizer, Reference Enthalpy

0-100% with Barometric Relief G = Economizer, Comparative

Enthalpy 0-100%

without Barometric Relief H = Economizer, Comparative

Enthalpy 0-100%

with Barometric Relief

Digit 29 — Piping Arrangement

0 = Standard Piping Configuration

Digits 30-36 — Does Not Apply

ToThe Rooftop Product

000 0000= Digit 30-36 Does NOT Apply to

the Rooftop Products

Note: Through-the-base electric is a

standard feature on the water-

source rooftop unit.

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General Information

Jobsite Inspection

Always perform the following checks before accepting a unit:

• Verify that the nameplate data matches the data on the sales order and bill of lading (including electrical data).

• Verify that the power supply complies with the unit nameplate specifications.

• Visually inspect the exterior of the unit, for signs of shipping damage. Do not sign the bill of lading accepting the unit(s) until inspection has been completed. Check for damage promptly after the unit(s) are unloaded. Once thebill of lading is signed at the jobsite, the unit(s) are now the property of the SOLDTO party and future freight claims MAY NOT be accepted by the freight company.

• After assuring that charge has been retained, reinstall the schrader caps to assure that refrigerant leakage does not occur.

• Verify that the refrigerant charge has been retained during shipment by use of gauges. Schrader taps are located internal to the cabinet.

• After assuring that charge has been retained, reinstall the schrader caps to assure that refrigerant leakage does not occur.

Jobsite Storage

Take precautions to prevent condensate from forming

inside the unit’s electrical compartments and motors if:

• If the unit is stored before it is installed.

• The unit is set on the roof curb, and temporary heat is provided in the building. Isolate all side panel service entrances and base pan openings (e.g. conduit holes, supply air/return airopenings, and flue openings) from the ambient air until the unit is ready for start-up.

The manufacturer will not assume any responsibility for

equipment damage resulting form condensate accumulation on the unit’s electrical and/or mechanical components.

Unit Description

Before shipment, each unit is leak tested, dehydrated, charged with refrigerant and compressor oil, and run tested for proper control operation.

Unit Nameplate

The unit nameplateis located onthe units’s corner support

just above the main powerentrance access into the control panel. It includes the unit model number, serial number,

electrical characteristics, refrigerant charge, and other pertinent unit data.

Compressor Nameplate

The nameplate for the compressors are located on the

compressor terminal box.

Air-to-Refrigerant Coil

The air-to-refrigerant coil is aluminum fin, mechanically

bonded to the copper tubing.

Water-to-Refrigerant Coil

The water-to-refrigerant coil is a copper or cupro-nickel

(option) and steel tube (tube-within-a-tube) design, leak tested to assure there is no cross leakage between the water tube (copper/cupro-nickel) and refrigerant gas (steel tube).

The control system offered to control the unit is a

ReliaTel™ Control Module. It may be installed as a standalone unit control module, or tied to a full building automation system.

The ReliaTel™Control Module is a microelectronic control

module that is referred to as a Refrigeration Module (RTRM).The acronym RTRM is used extensively throughout this document when referring to the control system network.

These modules through Proportional/Integral control

algorithms perform specific unit functions that govern unit operation in response to zone temperature, supply air temperature and/or humidityconditions depending on the application.The stages of capacity control for these units is achieved by starting and stopping the compressors.

The RTRM is mounted in the control panel and is factory

wired to the respective internal components. RTRM receives and interprets information from other unit modules, sensors, remote panels and customer binary contacts to satisfy the applicable request for cooling.

System Input Devices and Functions

The RTRM must have a mode input in order to operate the

rooftop unit.The flexibility of having several mode capabilities depends upon the type of sensor and/or remote panel selected to interface with the RTRM.The possibilities are; Fan selection ON or AUTO, System selection HEAT, COOL, AUTO, and OFF.

The descriptions of the following basic input devices used

with the RTRM network are to acquaint the operator with their function as they interface with the various modules. Refer to the unit’s electrical schematic for the specific module connections.

Compressor Disable (CPR1/2)

This input incorporates the low (LPC) of each refrigeration

circuit and can be activated by opening a field supplied contact installed in series with the LPC.

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General Information

If this circuit is open before the compressor is started, the compressor will not be allowed to operate. Anytime this circuit is opened for 5-continuous seconds during compressor operation, the compressor for that circuit is immediately turned OFF. The compressor will not be allowed to restart for a minimum of 3-minutes should the LPC close.

If four consecutive open conditions occur during the first 3-minutes of operation, the compressor forthat circuit will be locked out, a diagnostic communicated to the remote panel (if installed) and a manual reset will be required to restart the compressor.

Low Pressure Control

With the ReliaTel module, the low pressure will be

activated when a field supplied contact is opened. Anytime this circuit is opened for 5-continuous seconds, the compressor for that circuit is turned off immediately.

The compressor will not be allowed to restart for a

minimum of 3-minutes.

If four consecutive open conditions occur during the first 3-minutes of operation, the compressor will be locked out, a diagnostic communicated to ICSTM if applicable, and a manual reset will be required to restart the compressor.

High Pressure Control

The high pressure controls are wired in series between the

compressor outputs on the RTRM and the compressor contactor coils. If the high pressure control switch opens, the RTRM senses a lack of current while calling for cooling and locks the compressor out.

On dual circuit units, if the high pressure control opens, the compressor on the affected circuit is locked out. A manual reset for the affected circuit is required.

Economizer Control Actuator ECA (option)

The ECA monitors the mixed-air temperature, return air

temperature, minimum position setpoint (local or remote), power exhaust setpoint, CO2 setpoint, CO2 and ambient dry bulb/enthalpy sensor or comparative humidity (return air humidity against ambient humidity) sensors, if selected, to control dampers to an accuracy of

± 5% of stroke.The actuator is spring returned to the closed position any time power is lost to the unit. It is capable of delivering up to 25-inch pounds of torque and is powered by 24 VAC.

RTCI-ReliaTel Trane Communication Interface (option)

This module is used when the application calls for an ICS

building management type control system. It allows the control and monitoring of the system through an ICS panel.The module can be ordered from the factory or ordered as a kit to be field installed. Follow the installation instruction that ships with each kit when field installation is necessary.

RTLI-ReliaTel LonTalk Communication Interface (option)

This module is used when the application calls for either

an ICS building management type control system that is LonTalk. It allows the control and monitoring of the system through an ICS panel.The module canbe ordered from the factory or ordered as a kit to be field installed. Follow the installation instruction that ships with each kit when field installation is necessary.

RTOM-ReliaTel Options Module (option)

The RTOMmonitors the supply fanproving, clogged filter,

supply air temperature, exhaust fan setpoint, supply air tempering, FrostatTM and smoke detector. Refer to system input devices and functions for operation.

Supply Fan Failure Input (option)

The fan failure switch can be factory or field installed to

sense indoor fan operation. With the FFS-Fan Failure Switch, if air flow through the unit is not proven by the differential pressure switch (factory set point 0.07-inch w.c.) within 40-seconds nominally, the RTRM will shut off all mechanical operations, lock the system out, send a diagnostic to ICS, and the service LED will flash.The system will remain locked out until a reset is initiated either manually or through ICS.

Clogged Filter Switch (option)

The unit mounted clogged filter switch monitors the

pressure differential across the return air filters. It is mounted in the filter section and is connected to the RTOM. A diagnostic service signal is sent to the remote panel if the pressure differential across the filters isat least

0.5-inch w.c.The contacts will automatically open when the pressure differential across the filters decreases to approximately 0.4-inch w.c.The clogged filter output is energized when the supply fan is operating and the clogged filter switch has been closed for at least 2minutes.The system will continue to operate regardless of the status of the filter switch.

Power Exhaust Control (option)

The power exhaust fan is started whenever the position of

the economizer dampers meets or exceed the power exhaust setpoint when the indoor fan is on.The setpoint panel is located in the return air section, and is factory set to 25%.

Evaporator Frost Control (option)

This input incorporates the Frostat control (FOS) of each

refrigeration circuit and can be activated by closing a field supplied contact installed in parallel with the FOS.

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General Information

allowed to restart for a minimum of 3-minutes should the FOS close.

Smoke Detector Sensor (option)

This sensor provides high limit shutdown of the unit and

requires a manual reset.The sensor is used to detect smoke due to fire in the air conditioning or ventilation ducts.

In order for the supply air smoke detector or return air smoke detector to properly sense smoke in the supply/ return air stream, the air velocity entering the smoke detector unit must be between 500 and 4000-feet per minute.

Discharge Line Thermostat

A bi-metal element discharge line thermostats installed as a standard option on the discharge line of each system.

This standard option provides extra protection to the

compressors against highdischarge temperatures in case of loss of charge, extremely high ambient and other conditions which could drive the discharge temperature higher.

Field installed ONLY Accessories

High Temperature Sensor (BAYFRST002A)

This sensor connects the RTRM Emergency Stop Input

LTB1-5 and LTB1-6 and provides high limitshutdown of the unit and requires a manual reset.The sensor is used to detect high temperatures due to firein the air conditioning or ventilation ducts.The sensor is designed to mount directly to the sheet metal duct. Each kit contains two sensors.The return air duct sensor (X13100040010) is set to open at 135-degrees F. The supply air duct sensor (X13100040020) is set to open at 240-degrees F.The control can be reset after the temperature has been lowered approximately 25-degrees F below the cutout setpoint.

ElectronicTimeclock (BAYCLCK001A)

This electronic timeclock is designed to control the

occupied/unoccupied switching of up to four rooftop units. Once the unit(s) has entered an unoccupied status, night setback temperatures can be controlled by utilizing a standard zone sensor wired to the RTRM.The timeclock contains four binary outputs (RE1, RE2, RE3, RE4), a liquid crystal display (LCD), and four programming keys (Time/ Day Key, Occupied/Unoccupied Program Key, Run Key, and an Advance/Override Key). An 18 to 30-VAC power source is required either from one of the units being controlled or from a separate class-2 power source.

Zone Panel (BAYSENS106A)

This electronic sensor features three system switch

settings (EM HEAT, HEAT, COOL, and OFF) and two fan settings (ON andAUTO).It is amanual changeover control with single setpoint capability.

Zone Panel (BAYSENS108A)

This electronic sensorfeatures four systemswitchsettings

(HEAT, COOL, AUTO, OFF) and two fan settings (ON and AUTO).It is a manual or auto changeovercontrol with dual setpoint capability. It can be used with a remote zone temperature sensor BAYSENS017B.

Remote Panel w/o NSB (BAYSENS110A)

This electronic sensorfeatures four systemswitchsettings

(HEAT, COOL, AUTO, and OFF) and two fan settings (ON and

AUTO)with four system status LED’s. It is a manualor auto changeover control with dual setpoint capability. It can be used with a remote zone temperature sensor BAYSENS017B.

Programmable Zone Sensor (BAYSENS019B)

This 7-day programmable sensor features 2, 3, and 4-

periods for Occupied/Unoccupied programming per day. If the power is interrupted, the program is retained in permanent memory. If power is off longer than 2-hours, only the clock and day may have to be reset.

The zone sensor allows selection of 2, 3, and 4 system

modes (HEAT, COOL,AUTO, and OFF), two fan modes (ON and AUTO) It has dual temperature selection with programmable start time capability.

The occupied cooling setpoint ranges between 45 and 98-

degrees F.The heating setpoint ranges between 43 and 96degrees F.

A liquid crystal display (LCD) displays zone temperature, temperature set points, day of the week, time, and operational mode symbols.

The option menu is used to enable or disable applicable

functions, (i.e. morning warm-up, economizer minimum position override during unoccupied status, fahrenheit or centigrade, supply air tempering, remote zone temperature sensor, 12/24-hour time display, smart fan, and computed recovery.

During an occupied period, an auxiliary relay rated for

1.25-amps at 30-volts AC with one set of single pole, double throw contacts is activated.

Remote Zone Sensor (BAYSENS013C)

This electronic sensor features remote zone sensing and

timed override with override cancellation. It is used with a

Trane Integrated ComfortTM building management

system.

Remote Zone Sensor (BAYSENS014C)

This electronic sensor features single setpoint capability

and timed override with override cancellation. It is used with aTrane Integrated ComfortTM building management system.

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General Information

Remote Zone Sensor (BAYSENS016A)

This bullet type temperature sensor can be used for

outside-air ambient sensing, return air temperature sensing, supply air temperature sensing, remote temperature sensing (uncovered).Wiring procedures vary according to the particular application and equipment involved. Refer to the unit’s wiring diagrams for proper connections.

Remote Zone Sensor (BAYSENS017B)

This electronic sensor can be used with BAYSENS106A,

108A, 110A, 019A, 020A, or 021A remote panels.When this sensor is wired to a BAYSENS019A or BAYSENS020A

remote panel, wiring must be 18 AWG shielded twisted pair (Belden 8760 or equivalent). Refer to the specific remote panel for wiring details.

Component Location

1. Controls

2. Compressor/water-to-refrigerant section

3. Air-to-refrigerant coil

4. Filter location

5. Blower and motor location

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Dimensions

Unit Clearances

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Figure 1. 036 to 048 Clearances

3-4 tons economizer, manual or motorized fresh air damper

3-4 tons - swing diameter for hinged door(s) option

Note: All dimensions are in inches/millimeters. Note: All dimensions are in inches/millimeters.

17 7/8"

(448 MM)

16"

(406 MM)

22 1/4"

(565 MM)

3-4 tons - economizer & barometric relief damper hood

Note: All dimensions are in inches/millimeters.

Dimensions

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Dimensions

5-6 tons - economizer, manual or motorized fresh air damper

Note: All dimensions are in inches/millimeters.

5-6 tons - swing diameter for hinged door(s) option

Note: All dimensions are in inches/millimeters.

21 3/8”

(543 MM)

17”

(432 MM)

34 5/8”

(879 MM)

Figure 2. 060 to 072 Clearances

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Figure 3. 090 Clearances

7½ tons power exhaust

7½ tons swing diameter for hinged door(s) option

Note: All dimensions are in inches/millimeters.

21 3/8"

543 MM

17"

432 MM

34 5/8"

879 MM

7½ tons manual or motorized fresh air damper

Note: All dimensions are in inches/millimeters.

Dimensions

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Dimensions

10 tons exhaust

10 tons swing diameter for hinged door(s) option

Note: All dimensions are in inches/millimeters.

55/8"

(143 MM)

21 5/8"

(549 MM)

ECONOMIZER HOOD

10 tons economizer, manual or motorized fresh air damper

Note: All dimensions are in inches/millimeters.

ECONOMIZER HOOD

BAROMETRIC RELIEF HOOD

7 3/4”

(198 MM)

12”

(304 MM)

16 3/4”

(425 MM)

6 7/8”

(175 MM)

Figure 4. 120 Clearances

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Figure 5. 150 - 300 Clearances

When applying economizer to horizontal units, connected ductwork must be run full size to allow proper operation of economizer damper.

Fresh Air Hood (Horizontal Units)

Economizer - Horizontal Units

Power Exhaust Dimensions Unit Model # A B C GERE150-240 19½ 64¾ 39

Dimensions

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Dimensions

Figure 6. 3 to 4-Ton Unit

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Figure 7. 5 -Ton Unit

Dimensions

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Dimensions

Figure 8. 6 -Ton Unit

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Figure 9. 7 1/2-Ton Unit

Dimensions

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Dimensions

Figure 10. 10 -Ton Unit

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Figure 11. 12 1/2 and 15-Ton Unit

20 13/16" 529mm

12 5/16" 313mm

23" 584mm

Dimensions

54" 1372mm

(a) See tables in chapter “General Data,” p. 13, for water connection sizes.

26 7/8" 684mm

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Dimensions

Figure 12. 20-Ton Unit

20 7/8" 530mm

12 1/2" 317mm

24 1/4" 616mm

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Figure 13. 25-Ton Unit

85 5/16" 2167mm

20 13/16" 529mm

12 5/16" 313mm

Dimensions

54"

64”

1372mm

1626 mm

26 7/8" 264mm

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Dimensions

Figure 14. 3 to 4-Ton Roofcurb

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Figure 15. 5, 6 and 7 1/2 -ton roofcurb

20 13/16" 529mm

12 5/16" 313mm

23" 584mm

Dimensions

54" 1372mm

(a) See tables in chapter “General Data,” p. 13, for water connection sizes.

26 7/8" 684mm

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Page 26

Dimensions

Figure 16. 10 -Ton Roofcurb

20 7/8" 530mm

12 1/2" 317mm

24 1/4" 616mm

26 WSHP-SVX12B-EN

Page 27

Figure 17. 12 1/2 to 25-Ton Roofcurb

85 5/16" 2167mm

20 13/16" 529mm

12 5/16" 313mm

Dimensions

54"

64”

1372mm

1626 mm

(a) See tables in chapter “General Data,” p. 13, for water connection sizes.

26 7/8" 264mm

WSHP-SVX12B-EN 27

Page 28

Dimensions

WARNING

Heavy Objects!

Do not use cables (chains or slings) except as shown. Each of the cables (chains or slings) used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length. Adjust as necessary for even unit lift. Other lifting arrangements may cause equipment or property-only damage. Failure to properly lift unit could result in death or serious injury. See details below.

Figure 18. Corner weight locations and center of

gravity

Center

of Gravity

nter of Gravity

Width

Length

Figure 19. Rigging

Center of Gravity

Table 1. Typical unit weights and point loading data

Net

Model A B C D Length Width

Weight

036 487 132 121 112 121 33.0 19.0

048 538 146 134 124 134 33.0 19.0

060 678 188 164 154 173 40.5 23.0

072 700 194 169 159 179 40.5 23.0

090 794 218 194 182 201 41.0 23.0

120 941 235 251 234 221 52.0 28.0

150 1800 491 481 410 418 60.0 32.0

180 1848 505 493 421 429 60.0 32.0

240 2008 548 536 458 466 60.0 32.0

300 1906 520 509 435 442 30.0 32.0

Corner Weights Center of Gravity

Table 2. Net weights for electric heat are as follows

Unit Size 23-36 kW 54 kW 72 kW

GER 150, 180, 240, 300 33/27 40/32 43/34

28 WSHP-SVX12B-EN

Page 29

Dimensions

Table 3. Option and accessory weights

Option/Accessory Description Net Weight 036-060 Net Weight 072-120 Net Weight 150-180, 300 Net Weight 240

Electric Heat 15 15 - -

Economizer H/D 26 36 65/80 65/80

Motorized Damper 20 30 60/75 60/75

Manual Damper 16 26 32 32

Barometric Relief 7 10 - -

Power Exhaust N/A 80 95 95

Oversized Motor 5 8 5 5

Belt Drive Motor (3-phase only) 31 Standard 10 10

Hinged Access 10 12 27 27

Hail Guard 12 20 - -

Through the base electrical 8 13 23 23

Unit Disconnect Switch 5 5 10 10

Unit Circuit Breaker 5 5 10 10

TCI, LCI 1 1 1 1

Frostat 1 1 1 1

Crankcase Heater 1 1 1 1

Smoke Detector, Return 7 7 - -

Smoke Detector, Supply 5 5 5 5

Clogged Filter Switch 1 1 1 1

Fan Fail Switch 1 1 1 1

Discharge Air Tube 3 3 3 3

Roof curb 70 115 235 235

Zone Sensors 1 1 1 1

WSHP-SVX12B-EN 29

Page 30

Installation

General Installation Checks

The checklist below is a summary of the steps required to

successfully install a commercial unit.This checklist is intended to acquaint the installing personnel with what is required in the installation process. It does not replace the detailed instructions called out in the applicable sections of this manual.

• Check the unit for shipping damage and material shortage; file a freight claim and notify appropriate sales representation.

• Verify the correct model, options and voltage from the unit nameplate.

• Verify the installation location of the unit will provide the required clearance for proper operation.

• Assembleand install the roof curb (if applicable). Refer to the latest edition of the curb installers guide that ships with each curb kit.

• Fabricate and installduct work; secure duct work to the curb.

Factory Installed Economizer

• Ensure the economizer has been pulled out into the operating position. Refer to the economizer installers guide for proper position and setup.

• Install all access panels.

Filter Installation

• Each unit ships with 1-inchfilters.The quantity of filters is determined by unit size. Access to the filters is obtained by removing the fan access panel.To modify the unit’s filter rack to accept 2-inch filters, remove the L-shaped angle attachment screws and rotate the angles 90-degrees.

• Reinstall the screws and insert new filters. Refer to the unit Service Facts (shipped with each unit) for filter requirements.

Note: Do not operate the unit without filters.

Main Electrical Power Requirements

WARNING

Proper Field Wiring and Grounding Required!

All field wiring MUST be performed by qualified

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

• Verify the power supply complies with the unit nameplate specifications.

• Inspect all control panel components; tighten any loose connections.

• Connect properly sized and protected power supply wiring to a field-supplied/installed disconnect switch and to themain power terminal block (HTB1) in the unit control panel.

• Install proper grounding wires to an earth ground.

Note: All field-installed wiring must comply with NEC

and applicable local codes.

Electric Heat Requirements

• Verify that the power supply complies with the electric heater specifications on the unit and heater nameplate.

• Inspect the heater junction box and control panel; tighten any loose connections.

• Check electric heat circuits for continuity.

Low Voltage Wiring (AC & DC) Requirements

• Install the zone thermostat, with or without switching subbase.

• Connect properly sized control wiring to the proper termination points between the zone thermostat and the unit control panel.

Foundation for Rooftop Units

If the unit is installed at ground level (horizontal design), elevate it above the snow line.Provideconcrete footings at each support location with a full perimeter support structure or a slab foundationfor support. Refer toTable 1,

p. 28 for the unit’s operating and point loading weights

when constructing a footing foundation.

If anchoring is required, anchor the unit to the slab using hold down bolts or isolators. Isolators should be installed to minimize the transmission of vibrations into the building.

For rooftop applications, ensure the roof is strong enough to support the combined unit and support structural weight.

30 WSHP-SVX12B-EN

Page 31

WARNING

Risk of Roof Collapsing!

Confirm with a structural engineer that the roof structure is strong enough to support the combined weight of the roofcurb and the unit. Refer to Table 1,

p. 28 and Table 3, p. 29 for typical unit and curb

weights. Failure to ensure proper structural roof support could cause the roof to collapse, which could result in death or serious injury and property damage.

If anchoring is required, anchor the unit to the roof with hold-down bolts or isolators.

Check with the contractor for proper waterproofing procedures.

Installation

Note: For sound consideration, cut only the holes in the

roof deck for the duct work penetrations. Do not cut out the entire roof deck within the curb perimeter.

If Curb Accessory Kit is not used:

The duct work can be attached directly to the factory

provided flanges around the unit’s supply and return air openings. Be sure to use flexible duct connections at the unit.

For built-up curbs supplied by others, gaskets must be installed around the curb perimeter flange and the supply and return air opening flanges.

Note: For sound consideration, cut only the holes in the

roof deck for the duct work penetrations. Do not cut out the entire roof deck within the curb perimeter.

Ductwork

When attaching the ductwork to the unit, provide a

watertight flexible connector at the unit to prevent operating sounds from transmitting through the ductwork.

Elbows with turning vanes or splitters are recommended to minimize air noise due to turbulence and to reduce static pressure.

All outdoor ductwork between the unit and the structure should be weather proofed after installation is complete. See dimensional data on pages 13 through 16 for connection sizes.

Roof Curbs

The roof curbs for these units (down flow) consists of a full

perimeter enclosure to support the unit. Before installing any roof curb:

• Verify that the correct roof curb is applied to the unit

• Verifythat the roofcurb includes thenecessary gaskets and hardware.

• Verify that the proposed installation location provides the required clearance for proper unit operation.

• Insure that the curb is level and square.The topsurface of the curbmust be true to assure an adequate curb-tounit seal.

Step-by-step curb assembly and installation instructions ship with each accessory roof curb kit. Follow the instructions carefully to assure proper fit-up whenthe unit is set into place.

To assure proper condensate flow during operation, the

unit (and curb) must be level.

If the unit is elevated, a field constructed catwalk around the unit is strongly recommended to provide easy access for unit maintenance and service.

Recommendations for installing the supply air and return air ductwork joining the roof curb are included in the curb instruction booklet. See dimensional data on pages 17 through 20 for roof curb sizing.

Rigging the Unit

A rigging illustration and center-of-gravity dimensional data table are shown in Table 1, p. 28. Refer to the typical unit operating weights table before proceeding.

1. Remove the two screws from each end of the unit that secures the wooden shipping top.Remove the wooden top and metal retaining brackets. Remove the protective covering from around the unit.

2. Rig the unit. Attach adequate strength lifting slings to all four lifting brackets in the unit base rail. Do not use cables, chains, or slings except as shown.

3. Install a lifting bar, (as shown in the illustration), to protect the unit, and to facilitate a uniform lift.The minimum distance between the lifting hook and the top of the unit should be 7-feet.

4. Test lift the unit to ensure it is properly rigged and balanced. Make any necessary rigging adjustments.

5. Lift the unit and position it into place.

6. Downflow units; align the base rail of the unit with the curb rail while lowering the unit onto the curb. Make sure that the gasket on the curb is not damaged while positioning the unit.

7. Set the unit onto the curb; check for levelness.

8. Ensure unit-to-curb seal is tight and without buckles or cracks.

9. Install and connect a condensate drain line to the evaporator drain connection.

Supply/Return Pipe

Connect the supply and return line to the water inlet and outlet of the unit. On open loop systems, an in-line strainer or mesh screen should be used to eliminate contaminants from entering the water-to refrigerant heat exchanger.

An isolation valve, p/t plugs and automatic balancing device are alsorecommended to separatethe closed/open loop from the mechanical device.

WSHP-SVX12B-EN 31

Page 32

Installation

Drain Connection

An evaporator condensate drain connection is provided on each unit.The condensate drain pan is factory installed to drain condensate to the back side of the unit. It can be converted to drain condensate out of the front of the unit or through the base

To convert drain condensate out the front of the

unit:

1. Remove the evaporator access panel and supply air access panels.

2. Remove the support panel that the condensate drain pan exits through.

3. Slide the condensate drain pan out of the unit and rotate 180°.

4. Slide the condensate drain pan back into the unit,align the drain with the grommeted opening in the rear support panel and push until the coupling is seated in the grommet.

5. Replace the front support panel by aligning the panel with tabs in the raceway. Align the condensate drain pan support in the grommeted hole as the panel is put in place.

6. Replace the evaporator access paneland the supply air access panels.

To convert drain condensate through the base of the

unit:

1. Remove the evaporator access panel and supply air access panels.

2. Remove the support panel that the condensate drain pan exits through.

3. Slide the condensate drain pan out of the unit.

4. Place on a level surface in the position it was removed from the unit.

5. Remove the plug knockout in the bottom of the drain pan to convert it to through the base drainage.

6. Plug theoriginal condensate drain opening with a field supplied 3/4-inch NPT plug.

7. Slide the condensate drain pan back into the unit, align the drain support with the grommeted opening in the rear support panel and push until the supportis seated in the grommet.

8. Replace the front support panel by aligning the panel with tabs in the raceway.Align the plugged condensate drain pan coupling in thegrommeted hole as the panel is put in place.

9. Replace evaporator access panel and supply air access panels.

10. A condensate trap must be installed at the unit due to the drain connection being on the negative pressure side of the fan. Install the p-trap using the guidelines below.

A condensate drain line must be connected to the p-trap. Pitch the drain lines at least 1/2-inch for every 10-feet of horizontal run to assure proper condensate flow. Do not allow the horizontal run to sag causing a possible doubletrap condition which could result in condensate backup due to air lock.

Figure 20.

Horizontal Discharge Conversion

Units are factory shipped in the downflow discharge configuration, but can be field converted to a horizontal discharge configuration. Some, but not all units require a different thermal cut-out limit switch (which is wire tied near the terminal block in the heater compartment) if the horizontal discharge configuration is used.

The following units require a limit switch change out for

the horizontal discharge.The additional limit switch is shipped attached to the blower housing.

If any of the units listed in the following list are installed in the downflow discharge configuration, remove the wire tiedTCO-A (located near the terminal block in the heater compartment) and discard.

Conversion 3 through 5-Ton Units

To convert a unit from down flow to horizontal discharge,

1. Remove the return and supply duct covers.

2. Apply gasket to the supply duct cover as shown in

Figure 21, p. 32.

Figure 21. Gasket Installation

32 WSHP-SVX12B-EN

Page 33

Installation

3. Position duct covers. Rotate the supply duct cover 90degrees to allow it to be slid into the supply opening.

Figure 22. Duct cover with gasket installed

Note: If the unit is equipped with a return air smoke

detector, refer to the field conversion for horizontal discharge before installing the return air duct cover.

4. Slide the duct covers into the duct openings until the end ward edge of the duct cover engages with the two retaining clips on theduct flanges. Secure the outward edge of each duct cover with two screws.

Note: If unit should include a limit switch change out,

proceed to theTCO-A instruction sheet on “TCO-A

Instructions,” p. 33

Figure 23. Installing duct cover

Conversion 6 through 10-Ton Units

To convert a unit from down flow to horizontal discharge,

1. Remove the return and supply duct covers.

2. Apply gasket to the return duct cover as shown in

Figure 22.

3. Position the duct covers as shown below.The supply duct cover is installed over the down flow return opening by engaging one side of the panel under a

retaining angle and securing the other side with three screws.

Note: If the unit is equipped with a return air smoke

detector, refer to the field conversion for horizontal discharge before installing the return air duct cover.

4. Slide return duct cover into supply openings until end ward edge of the duct cover engages with the two retaining clips on theduct flanges. Secure the outward edge of each duct cover with two screws.

Note: If unit should include a limit switch change out,

proceed to theTCO-A instruction sheet on this page.

TCO-A Instructions

If the unit being installed is listed in the following table, and is equipped with the corresponding model number of factory installed electric heater package in the table, the limit controlTCO-A must be replace with the extra limit control shipped in the heater compartment. ReplaceTCOA following the instruction in steps 1 through 4. If the unit being installed does not have a factory installed electric heater package, or is equipped with a factory installed electric heater model that does not correspond to models listed below, skip steps 1 through 4, and go on to the next step in the installation process.

Note: See Table 7, p. 40 for electric heater kit part #s and

equipment models.

1. Remove the heater section access panel and open the electric heater front panel.

2. TCO-A is the limit control located in the central part of the heater mounting plate and that is located on the bottom of the two heater element assemblies.To replace this device, first remove the two wires connected to the terminals. Next, remove the two screws which secure it to the heater element mounting plate. OnceTCO-A has been removed from the heater element mounting plate, discard this device.

3. Obtain the replacement TCO-A which is secured by a wire tie near the electric heater terminal block in the heater compartment. Attach it to the heater element mounting plate with the twoscrews that were removed in step 2 above. Connect the two wires that were unhooked in step 2 to the terminals on the newTCO-A. Refer to the heater package wiring diagram to assure that the wiring is connected properly.

4. Close the electric heater dead front panel and replace heat section access panel.

WSHP-SVX12B-EN 33

Page 34

Installation

Field Installed Power Wiring

WARNING

Proper Field Wiring and Grounding Required!

All field wiring MUST be performed by qualified

Verify that the power supply available is compatible with

the unit’s nameplate.The available supply power must be within 10% of the rated voltage stamped on the nameplate. Use only copper conductors to connect the power supply to the unit.

Figure 24. Electrical entrance

Main Unit Power Wiring

1. If the unit is NOT equipped with an optional factory installed non-fused disconnect switch or circuit breaker, a field supplied disconnect switch must be installed at or near the unit in accordance with the National Electric Code (NEC latest edition).

2. Location of the applicable electric service entrance may be found in

3. Complete the unit’s power wiring connections onto either; the main terminal wire connectors inside the unit control panel, the factory mounted non-fused disconnect switch (UCD) orcircuit breaker (UCB). Refer to the customer connection diagram that is shipped with the unit for specific termination points.

4. Provide proper grounding for the unit in accordance with the local and national codes.

Figure 24, p. 34.

Field Installed Control Wiring

An overall layout of the various control options available with the required number of conductors for each control device may be found on Figure 25, p. 35 and Figure 26,

p. 36.

Note: All field wiring must conform to NEC guidelines as

well as state and local codes.

34 WSHP-SVX12B-EN

Control PowerTransformer

The 24-volt control power transformersare to beused only

with the accessories called out in this manual.

Transformers rated greater than 50VA are equipped with

internal circuit breakers. If a circuit breaker trips, turn OFF all power to the unit before attempting to reset it.

Page 35

WARNING

Hazardous Voltage!

Figure 25.

Installation

The transformer is located in the control panel.The circuit

breaker is located on the left side of the transformer and can be reset by pressing in on the black reset button.

WSHP-SVX12B-EN 35

Page 36

Installation

Figure 26.

36 WSHP-SVX12B-EN

Page 37

Installation

Controls Using 24 VAC

Before installing any wire, refer to the electrical access locations in Figure 24, p. 34.

1. Use copper conductors unless otherwise specified.

2. Ensure thatthe AC control wiring between the controls and the unit’s termination point does not exceed three (3) ohms/conductor for the length of the run.

Note: Resistance in excess of 3-ohms per conductor may

cause component failure due to insufficient AC voltage supply.

3. Check all loads and conductors for grounds, shorts, and mis-wiring.

4. Do not run the AC low voltage wiring in the same conduit with the high voltage power wiring.

5. Route low voltage wire per Figure 27 below.

Figure 27. Wire Routing

Note: Resistancein excess of 2.5 ohms per conductor can

cause deviations in the accuracy of the controls.

2. Ensure that the wiring between controls and the unit’s termination point does not exceed two and a half (2.5) ohms/conductor for the length of the run.

3. Do not run the electrical wires transporting DC signals in or around conduit housing high voltage wires.

4. Route low voltage wiring per Figure 27.

Table 5. DC conductors; zone sensor module wiring

Distance from unit to Control

0-150 feet 22 gauge

151-240 feet 20 gauge

241-385 feet 18 gauge

386-610 feet 16 gauge

611-970 feet 14 gauge

Recommended Wire Size

Table 4. 24V AC conductors

Distance from unit to Control

000-460 feet 18 gauge

461-732 feet 16 gauge

733-1000 feet 14 gauge

Recommended Wire Size

Controls using DC Analog Input/Outputs (Standard LowVoltage Multi-conductor Wire)

Before installing any connecting wire between the unit utilizing a DC analog input/output signal,

refer to Figure 24, p. 34 for electrical access locations provided on the unit.

1. Review Table 5, it lists the conductor sizing guidelines that must be followed when interconnecting the DC binary output devices and the system components utilizing a DC analog input/output signal to the unit.

WSHP-SVX12B-EN 37

Page 38

Electrical Requirements

Table 6. Electrical perfomance

Model No. Unit Volts

208/60/1 24.6 18.6 105.0 1 6.00 0.75 1 29.3 45

230/60/1 24.6 18.6 105.0 1 6.00 0.75 1 29.3 45

GERE036

GERE048

GERE060

GERE072

GERE090

GERE120

208/60/3 18.5 13.5 88.0 1 5.00 1 1 21.9 35

230/60/3 18.5 13.5 88.0 1 5.00 1 1 21.9 35

460/60/3 8.9 6.4 39.0 1 2.50 1 1 10.5 15

575/60/3 6.8 5.1 34.0 1 1.70 1 1 8.1 15

208/60/1 30.7 23.1 134.0 1 7.60 1 1 36.5 50

230/60/1 30.7 23.1 134.0 1 7.60 1 1 36.5 50

208/60/3 21.0 16.0 91.0 1 5.00 1 1 25.0 40

230/60/3 21.0 16.0 91.0 1 5.00 1 1 25.0 40

460/60/3 9.6 7.1 46.0 1 2.50 1 1 11.4 15

575/60/3 7.3 5.6 37.0 1 1.70 1 1 8.7 15

208/60/1 35.2 27.6 158.0 1 7.60 1 1 42.1 60

230/60/1 35.2 27.6 158.0 1 7.60 1 1 42.1 60

208/60/3 23.1 18.1 137.0 1 5.00 1 1 27.6 45

230/60/3 23.1 18.1 137.0 1 5.00 1 1 27.6 45

460/60/3 11.5 9.0 62.0 1 2.50 1 1 13.8 20

575/60/3 8.5 6.8 50.0 1 1.70 1 1 10.2 15

208/60/3 27.4 22.4 149.0 1 5.00 1 1 33.0 50

230/60/3 27.4 22.4 149.0 1 5.00 1 1 33.0 50

460/60/3 13.1 10.6 75.0 1 2.50 1 1 15.8 25

575/60/3 9.2 7.7 54.0 1 1.50 1 1 11.1 15

208/60/3 28.7 22.4 149.0 1 6.30 2 1 34.3 50

230/60/3 28.7 22.4 149.0 1 6.30 2 1 34.3 50

460/60/3 13.7 10.6 75.0 1 3.10 2 1 16.4 25

575/60/3 10.1 7.7 54.0 1 2.40 2 1 12.0 15

208/60/3 28.6 25.0 164.0 1 3.60 1 1 34.9 50

230/60/3 28.6 25.0 164.0 1 3.60 1 1 34.9 50

460/60/3 13.9 12.2 100.0 1 1.70 1 1 17.0 25

575/60/3 10.4 9.0 78.0 1 1.40 1 1 12.7 20

208/60/3 34.4 25.0 164.0 1 9.40 3 1 40.7 60

230/60/3 34.4 25.0 164.0 1 9.40 3 1 40.7 60

460/60/3 16.8 12.2 100.0 1 4.60 3 1 19.9 30

575/60/3 12.4 9.0 78.0 1 3.40 3 1 14.7 20

208/60/3 26.6 18.1 137.0 2 8.50 3.6 1 49.2 60

230/60/3 26.6 18.1 137.0 2 8.50 3.6 1 49.2 60

460/60/3 13.3 9.0 62.0 2 4.30 3.6 1 24.6 30

575/60/3 11.1 6.8 50.0 2 4.30 3.6 1 19.6 25

Total

Unit FLA

Comp

RLA (ea)

Comp

LRA (ea)

No. of

Compres.

Blower

Motor

FLA

Blower

Motor

Fan

Motor

Num

Minimum

Circuit

Ampacity

Maximum

Overcurrent

Protective

Device

38 WSHP-SVX12B-EN

Page 39

Table 6. Electrical perfomance

Electrical Requirements

Model No. Unit Volts

208/60/3 33.0 22.4 149.0 2 10.60 3 1 61.0 80

230/60/3 33.0 22.4 149.0 2 10.60 3 1 61.0 80

460/60/3 15.4 10.6 75.0 2 4.80 3 1 28.7 35

GERE150

GERE180

GERE240

GERE300

575/60/3 11.8 7.9 54.0 2 3.90 3 1 21.7 25

208/60/3 39.1 22.4 149.0 2 16.70 5 1 67.1 80

230/60/3 39.1 22.4 149.0 2 16.70 5 1 67.1 80

460/60/3 18.2 10.6 75.0 2 7.60 5 1 31.5 40

575/60/3 14.0 7.9 54.0 2 6.10 5 1 23.9 30

208/60/3 35.6 25.0 164.0 2 10.60 3 1 66.9 90

230/60/3 35.6 25.0 164.0 2 10.60 3 1 66.9 90

460/60/3 17.3 12.5 100.0 2 4.80 3 1 32.9 45

575/60/3 14.2 10.3 78.0 2 3.90 3 1 27.1 35

208/60/3 41.7 25.0 164.0 2 16.70 5 1 73.0 90

230/60/3 41.7 25.0 164.0 2 16.70 5 1 73.0 90

460/60/3 20.1 12.5 100.0 2 7.60 5 1 35.7 45

575/60/3 16.4 10.3 78.0 2 6.10 5 1 29.3 35

208/60/3 55.8 39.1 267.0 2 16.70 5 1 104.7 125

230/60/3 55.8 39.1 267.0 2 16.70 5 1 104.7 125

460/60/3 24.9 17.3 142.0 2 7.60 5 1 46.5 60

575/60/3 21.5 15.4 103.0 2 6.10 5 1 40.8 50

208/60/3 56.7 39.1 267.0 2 17.60 7.5 1 105.6 125

230/60/3 56.7 39.1 267.0 2 17.60 7.5 1 105.6 125

460/60/3 25.9 17.3 142.0 2 8.60 7.5 1 47.5 60

575/60/3 22.4 15.4 103.0 2 7.00 7.5 1 41.7 50

208/60/3 63.3 39.1 267.0 2 24.20 7.5 1 112.2 150

230/60/3 63.3 39.1 267.0 2 24.20 7.5 1 112.2 150

460/60/3 29.6 18.6 103.0 2 11.00 7.5 1 52.9 70

575/60/3 24.4 15.4 160.0 2 9.00 7.5 1 43.7 50

Total

Unit FLA

Comp

RLA (ea)

Comp

LRA (ea)

No. of

Compres.

Blower

Motor

FLA

Blower

Motor

Fan

Motor

Num

Minimum

Circuit

Ampacity

Maximum

Overcurrent

Protective

Device

WSHP-SVX12B-EN 39

Page 40

Electrical Requirements

Table 7. Electrical Perfomance for units with electric heat (single point connection)

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

Heater Model

Number

208 Volt Single Phase

BAYHTRE105* 18.3 3.8 1 52.1 60 — —

GERE036

GERE048

GERE060

BAYHTRE110* 36.1 7.5 2 74.4 80 — —

BAYHTRE114* 50.0 10.4 2 91.8 100 — —

BAYHTRE105* 18.3 3.8 1 59.4 70 — —

BAYHTRE110* 36.1 7.5 2 81.6 90 — —

BAYHTRE114* 50.0 10.4 2 99.0 100 — —

BAYHTRE118* 63.5 13.2 2 115.9 125 — —

BAYHTRE105* 18.3 3.8 1 65.0 80 — —

BAYHTRE110* 36.1 7.5 2 87.2 100 — —

BAYHTRE114* 50.0 10.4 2 104.6 110 — —

BAYHTRE118* 63.5 13.2 2 121.5 125 — —

230 Volt Single Phase

BAYHTRE105* 20.8 5.0 1 55.3 60 — —

GERE036

GERE048

GERE060

BAYHTRE110* 41.7 10.0 2 81.4 90 — —

BAYHTRE114* 57.5 13.8 2 101.1 110 — —

BAYHTRE105* 20.8 5.0 1 62.5 80 — —

BAYHTRE110* 41.7 10.0 2 88.6 100 — —

BAYHTRE114* 57.5 13.8 2 108.4 110 — —

BAYHTRE118* 73.3 17.6 2 128.1 150 — —

BAYHTRE105* 20.8 5.0 1 68.1 90 — —

BAYHTRE110* 41.7 10.0 2 94.2 110 — —

BAYHTRE114* 57.5 13.8 2 114.0 125 — —

BAYHTRE118* 73.3 17.6 2 133.7 150 — —

208 Volt Three Phase

BAYHTRE306* 12.5 4.5 1 37.5 45 — —

GERE036

GERE048

GERE060

GERE072

GERE090

BAYHTRE312* 25.0 9.0 2 53.1 60 — —

BAYHTRE318* 36.4 13.1 2 67.4 70 — —

BAYHTRE306* 12.5 4.5 1 40.6 50 — —

BAYHTRE312* 25.0 9.0 2 56.3 60 — —

BAYHTRE318* 36.4 13.1 2 70.5 80 — —

BAYHTRE306* 12.5 4.5 1 43.3 50 — —

BAYHTRE312* 25.0 9.0 2 58.9 70 — —

BAYHTRE318* 36.4 13.1 2 73.1 80 — —

BAYHTRX323* 48.0 17.3 2 87.6 90 — —

BAYHTRW309A 6.8 18.9 1 56.6 70 57.9 70

BAYHTRW318A 13.5 37.5 1 79.9 90 81.2 90

BAYHTRW327A 20.3 56.3 2 103.4 110 104.7 110

BAYHTRW336A 27.0 74.9 2 126.6 150 127.9 150

BAYHTRU309A 6.8 18.9 1 58.4 70 64.2 80

BAYHTRU318A 13.5 37.5 1 81.7 90 87.5 100

BAYHTRU327A 20.3 56.3 2 105.3 110 111.1 125

BAYHTRU336A 27.0 74.9 2 128.5 150 134.3 150

Electric Heat

Amps

Electric Heat kWControl

Stages

Mimimum

Circuit

Ampacity

Overcurrent

Max

Protection

Mimimum

Circuit

Ampacity

——

Max

Overcurren

t Protection

40 WSHP-SVX12B-EN

Page 41

Table 7. Electrical Perfomance for units with electric heat (single point connection)

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

GERE120

GERE150

GERE180

GERE240

GERE300

Heater Model

Number

BAYHTRB318A 13.5 37.5 1 96.1 100 — —

BAYHTRB327A 20.3 56.3 2 119.7 125 — —

BAYHTRB336A 27.0 74.9 2 142.9 150 — —

BAYHTRB354A 40.6 112.7 2 190.1 200 — —

AYDHTRK318/

AYHHTRM318

AYDHTRK336/

AYHHTRM336

AYDHTRK354/

AYHHTRM354

AYDHTRK318/

AYHHTRM318

AYDHTRK336/

AYHHTRM336

AYDHTRK354/

AYHHTRM354

AYDHTRL336/

AYHHTRN336

AYDHTRL354/

AYHHTRN354

AYDHTRK372/

AYHHTRN372

AYDHTRL336/

AYHHTRN336

AYDHTRL354/

AYHHTRN354

AYDHTRK372/

AYHHTRN372

230 Volt Three Phase

BAYHTRE306* 14.4 6.0 1 39.9 45 — —

GERE036

GERE048

GERE060

GERE072

GERE090

BAYHTRE312* 28.9 12.0 2 58.0 60 — —

BAYHTRE318* 41.9 17.4 2 74.3 80 — —

BAYHTRE306* 14.4 6.0 1 43.0 50 — —

BAYHTRE312* 28.9 12.0 2 61.1 70 — —

BAYHTRE318* 41.9 17.4 2 77.4 80 — —

BAYHTRE306* 14.4 6.0 1 45.6 60 — —

BAYHTRE312* 28.9 12.0 2 63.8 70 — —

BAYHTRE318* 41.9 17.4 2 80.0 80 — —

BAYHTRX323* 55.3 23.0 2 96.8 100 — —

BAYHTRW309A 9.0 21.7 1 60.1 70 61.4 70

BAYHTRW318A 18.0 43.3 1 87.1 90 88.4 100

BAYHTRW327A 27.0 65.0 2 114.2 125 115.5 125

BAYHTRW336A 36.0 86.6 2 141.3 150 142.6 150

BAYHTRU309A 9.0 21.7 1 61.9 80 67.7 80

BAYHTRU318A 18.0 43.3 1 89.0 100 94.8 100

BAYHTRU327A 27.0 65.0 2 116.0 125 121.8 125

BAYHTRU336A 36.0 86.6 2 143.1 150 148.9 150

Electric Heat

Amps

37.5 13.5 1 107.9 110 114.0 125

74.9 27.0 2 154.6 175 160.7 175

112.4 40.5 2 201.5 225 207.6 225

37.5 13.5 1 113.7 125 119.8 125

74.9 27.0 2 160.5 175 166.6 175

112.4 40.5 2 207.4 225 213.5 225

74.9 27.0 2 198.3 200 199.2 200

112.4 40.5 2 245.2 250 246.1 250

149.9 54.0 2 292.1 300 293.0 300

74.9 27.0 2 205.8 225 — —

112.4 40.5 2 252.7 300 — —

149.9 54.0 2 299.6 300 — —

Electric Heat kWControl

Stages

Mimimum

Circuit

Ampacity

Overcurrent

Electrical Requirements

Max

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

WSHP-SVX12B-EN 41

Page 42

Electrical Requirements

Table 7. Electrical Perfomance for units with electric heat (single point connection)

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

GERE120

GERE150

GERE180

GERE240

GERE300

Heater Model

Number

BAYHTRB318A 18.0 43.3 1 103.4 110 — —

BAYHTRB327A 27.0 65.0 2 130.4 150 — —

BAYHTRB336A 36.0 86.6 2 157.5 175 — —

BAYHTRB354A 54.0 129.9 2 211.6 225 — —

AYDHTRK318/

AYHHTRM318

AYDHTRK336/

AYHHTRM336

AYDHTRK354/

AYHHTRM354

AYDHTRK318/

AYHHTRM318

AYDHTRK336/

AYHHTRM336

AYDHTRK354/

AYHHTRM354

AYDHTRL336/

AYHHTRN336

AYDHTRL354/

AYHHTRN354

AYDHTRK372/

AYHHTRN372

AYDHTRL336/

AYHHTRN336

AYDHTRL354/

AYHHTRN354

AYDHTRK372/

AYHHTRN372

460 Volt Three Phase

BAYHTRE406* 7.2 6.0 1 19.5 20 — —

GERE036

GERE048

GERE060

GERE072

GERE090

BAYHTRE412* 14.4 12.0 2 28.5 30 — —

BAYHTRE418* 20.9 17.4 2 36.6 40 — —

BAYHTRE406* 7.2 6.0 1 20.4 25 — —

BAYHTRE412* 14.4 12.0 2 29.4 30 — —

BAYHTRE418* 20.9 17.4 2 37.5 40 — —

BAYHTRE406* 7.2 6.0 1 22.8 25 — —

BAYHTRE412* 14.4 12.0 2 31.8 35 — —

BAYHTRE418* 20.9 17.4 2 39.9 40 — —

BAYHTRX423* 27.7 23.0 2 48.4 50 — —

BAYHTRW409A 9.0 10.8 1 29.3 35 29.9 35

BAYHTRW418A 18.0 21.7 1 42.8 45 43.4 45

BAYHTRW427A 27.0 32.5 2 56.3 60 56.9 60

BAYHTRW436A 36.0 43.3 2 69.9 70 70.5 80

BAYHTRU409A 9.0 10.8 1 30.5 35 33.4 40

BAYHTRU418A 18.0 21.7 1 44.0 50 46.9 50

BAYHTRU427A 27.0 32.5 2 57.5 60 60.4 70

BAYHTRU436A 36.0 43.3 2 71.1 80 74.0 80

Electric Heat

Amps

43.3 18.0 1 115.1 125 121.2 125

86.6 36.0 2 169.3 175 175.4 200

129.9 54.0 2 223.4 225 229.5 250

43.3 18.0 1 121.0 125 127.1 150

86.6 36.0 2 175.1 200 181.2 200

129.9 54.0 2 229.2 250 235.3 250

86.6 36.0 2 212.9 225 213.8 225

129.9 54.0 2 267.1 300 268.0 300

173.2 72.0 2 321.2 300 322.1 300

86.6 36.0 2 220.4 225 — —

129.9 54.0 2 274.6 300 — —

173.2 72.0 2 328.7 300 — —

Electric Heat kWControl

Stages

Mimimum

Circuit

Ampacity

Overcurrent

Max

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

42 WSHP-SVX12B-EN

Page 43

Table 7. Electrical Perfomance for units with electric heat (single point connection)

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

GERE120

GERE150

GERE180

GERE240

GERE300

Heater Model

Number

BAYHTRB418A 18.0 21.7 1 51.6 60 — —

BAYHTRB427A 27.0 32.5 2 65.1 70 — —

BAYHTRB436A 36.0 43.3 2 78.7 80 — —

BAYHTRB454A 54.0 65.0 2 105.7 110 — —

AYDHTRK418/

AYHHTRM418

AYDHTRK436/

AYHHTRP436

AYDHTRK454/

AYHHTRM454

AYDHTRK418/

AYHHTRM418

AYDHTRK436/

AYHHTRP436

AYDHTRK454/

AYHHTRM454

AYDHTRL436/

AYHHTRN436

AYDHTRL454/

AYHHTRN454

AYDHTRK472/

AYHHTRN472

AYDHTRL436/

AYHHTRN436

AYDHTRL454/

AYHHTRN454

AYDHTRK472/

AYHHTRN472

575 Volt Three Phase

BAYHTREW06* 5.8 6.0 1 15.3 20 — —

GERE036

GERE048

GERE060

GERE072

GERE090

GERE120

BAYHTREW12* 11.5 12.0 2 22.5 25 — —

BAYHTREW18* 16.7 17.4 2 29.0 30 — —

BAYHTREW06* 5.8 6.0 1 16.0 20 — —

BAYHTREW12* 11.5 12.0 2 23.1 25 — —

BAYHTREW18* 16.7 17.4 2 29.6 30 — —

BAYHTREW06* 5.8 6.0 1 17.5 20 — —

BAYHTREW12* 11.5 12.0 2 24.6 25 — —

BAYHTREW18* 16.7 17.4 2 31.1 35 — —

BAYHTRXW23* 22.1 23.0 2 37.8 40 — —

BAYHTRWW18A 18.0 17.3 1 32.8 35 33.7 35

BAYHTRWW27A 27.0 26.0 2 43.6 45 44.5 45

BAYHTRWW36A 36.0 34.6 2 54.4 60 55.3 60

BAYHTRUW18A 18.0 17.3 1 34.3 35 36.3 40

BAYHTRUW27A 27.0 26.0 2 45.1 50 47.1 50

BAYHTRUW36A 36.0 34.6 2 56.0 60 58.0 60

BAYHTRBW18A 18.0 17.3 1 41.2 45 — —

BAYHTRBW36A 36.0 34.6 2 62.9 70 — —

BAYHTRBW54A 54.0 52.0 2 84.6 90 — —

Electric Heat

Amps

21.7 18.0 1 55.8 60 58.6 60

43.3 36.0 2 82.8 90 85.6 90

65.0 54.0 2 109.9 110 112.7 125

21.7 18.0 1 60.1 70 62.9 70

43.3 36.0 2 87.1 90 89.9 90

65.0 54.0 2 114.2 125 117.0 125

43.3 36.0 2 100.7 110 101.7 110

65.0 54.0 2 127.8 150 128.8 150

86.6 72.0 2 154.8 175 155.8 175

43.3 36.0 2 107.0 110 — —

65.0 54.0 2 134.1 150 — —

86.6 72.0 2 161.1 175 — —

Electric Heat kWControl

Stages

Mimimum

Circuit

Ampacity

Overcurrent

Electrical Requirements

Max

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

WSHP-SVX12B-EN 43

Page 44

Electrical Requirements

Table 7. Electrical Perfomance for units with electric heat (single point connection)

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

GERE150

GERE180

GERE240

GERE300

Heater Model

Number

AYDHTRKW18/

AYHHTRMW18

AYDHTRKW36/

AYHHTRMW36

AYDHTRKW54/

AYHHTRMW54

AYDHTRKW18/

AYHHTRMW18

AYDHTRKW36/

AYHHTRMW36

AYDHTRKW54/

AYHHTRMW54

AYDHTRLW36/

AYHHTRNW36

AYDHTRLW54/

AYHHTRNW54

AYDHTRKW72/

AYHHTRNW72

AYDHTRMW36/

AYHHTRMW36

AYDHTRLW54/

AYHHTRNW54

AYDHTRKW72/

AYHHTRNW72

Electric Heat

Amps

17.3 18.0 1 43.3 45 45.5 50

34.6 36.0 2 64.9 70 67.1 70

52.0 54.0 2 86.7 90 88.9 90

17.3 18.0 1 48.7 50 50.9 60

34.6 36.0 2 70.3 80 72.5 80

52.0 54.0 2 92.1 100 94.3 100

34.6 36.0 2 84.0 90 84.9 90

52.0 54.0 2 105.8 110 106.7 110

69.3 72.0 2 127.4 150 128.3 150

34.6 36.0 2 86.9 90 — —

52.0 54.0 2 108.7 110 — —

69.3 72.0 2 130.3 150 — —

Electric Heat kWControl

Stages

Mimimum

Circuit

Ampacity

Overcurrent

Max

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

44 WSHP-SVX12B-EN

Page 45

Pre-Start

ZSM REMOTE SENSORS

#1 #2 #3 #4

11112222

REMOTE SENSOR

2#1#

REMOTE SENSOR

ZSM

TERMINAL

ZSM

REMOTE SENSORS

ZSM

2112

TERMINAL

ZSM ZSM

TERMINAL

#2 #3

REMOTE SENSOR

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

#6#5

12 1 2

2112

#8 #9

REMOTE SENSORS

ZSM

TERMINAL

MSZMSZ

TERMINAL

#1 #2

Space Temperature Averaging

Space temperature averaging is accomplished by wiring a number of remote sensors in a series/parallel circuit.

Using the BAYSENS016* or BAYSENS017*, at least four sensors are required to accomplish space temperature averaging.

Figure 28. Example 1

Example #2 illustrates three sensors squared in a series/ parallel circuit. Using BAYSENS032*, two sensors are required to accomplish space temperature averaging.

Figure 29. Example 2

Example #1 illustrates two series circuits with two sensors in each circuit wired in parallel.The square of any number of remote sensors require.

Example #3 illustrates the circuit required for this sensor.

Figure 30. Example 3

WSHP-SVX12B-EN 45

Page 46

Pre-Start

Table 8 lists the temperature versus resistance coefficient

for all sensors.

Table 8. Temp vs. Resistance

Degrees

-20 170.1 45 22.85

-15 143.5 50 19.96

-10 121.4 55 17.47

-5 103.0 60 15.33

0 87.56 65 13.49

5 74.65 70 11.89

10 63.80 75 10.50

15 54.66 80 9.297

20 46.94 85 8.247

25 40.40 90 7.330

30 34.85 95 6.528

35 30.18 100 5.824

40 26.22

*Temperature vs. resistance coefficient is negative

Nominal

Resistance

K-Ohms

Degrees

Nominal

Resistance

K-Ohms

Voltage Imbalance

V1, V2, V3 = Line Voltage Readings

VD = Line Voltage reading that deviates the farthest from

the average voltage.

Example: If the voltage readings of the supply power measured 221, 230 and 227, the average volts would be:

221+230+227

= 226 Avg.

VD (reading farthest from average) = 221

The percentage of Imbalance equals:

226 - 221

100 x

226

= 2.2%

The 2.2% imbalance in this example exceeds the

maximum allowable imbalance of 2.0%.This much imbalance between phases can equal as much as a 20% current imbalance with a resulting increase in motor winding temperatures that will decrease motor life. If the voltage imbalance is over 2%, notify the proper agencies to correct the voltage problem before operating this equipment.

Electrical Phasing (Three Phase Motors)

The compressor motor(s) and the supply fan motor are

WARNING

Live Electrical Components!

internally connected for the proper rotation when the incoming power supply is phased as A, B, C.

Proper electrical supply phasing can be quickly determined and corrected before starting the unit by an instrument such as an Associated Research Model 45 Phase Sequence Indicator and following the steps below:

properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.

Hazardous Voltage!

WARNING

Disconnect all electric power, including remote

Three phase electrical power to the unit must meet

stringent requirements for the unit to operate properly. Measure each leg (phase-to-phase) of the power supply. Eachreading must fall within the utilization range listed on the unit nameplate. If any of thereadings do not fall within the proper tolerances, notify the power company to correct this situation before operating the unit.

Excessive three phase voltage imbalance between phases will cause motors to overheat and eventually fail.The maximum allowable voltage imbalance is 2%. Measure and record the voltage between phases 1, 2, and 3 and calculate the amount of imbalance as follows:

disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

1. Turn the field supplieddisconnect switch that provides power to the main power terminal block or to the Line side of theoptional factory mounteddisconnect switch to the OFF position.

2. Connect the phase sequence indicator leads to the terminal block or the Line side of the optional factory mounted disconnect switch as follows:

Black (phase A) to L1

% Voltage Imbalance =

where;

AV (average voltage) =

100 x AV - VD

Volt 1 + Volt 2 + Volt 3

Red (phase B) to L2

Yellow (phase C) to L3

3. Close the field supplied main power disconnect switch or circuit protector switch that provides the supply power to the unit.

4. Observe theABC and CBA phase indicatorlights on the face of the sequencer.The ABC indicator light will glow

46 WSHP-SVX12B-EN

Page 47

Pre-Start

if the phase is ABC. If the CBA indicator light glows, open the disconnect switch or circuit protection switch and reverse any two power wires.

5. Restore the main electrical power and recheck the phasing. If the phasing is correct, open the disconnect switch or circuit protection switch and remove the phase sequence indicator.

Compressor Crankcase Heaters (Optional)

Each compressor can be equipped with a crankcase heater.The proper operation of the crankcase heater is important to maintain an elevated compressor oil temperature during the OFF cycle to reduce oil foaming during compressor starts. Oil foaming occurs when refrigerant condenses in the compressor and mixes with the oil. In lower ambient conditions, refrigerant migration to the compressor could increase.

When the compressor starts, the sudden reduction in

crankcase pressure causes the liquid refrigerant to boil rapidly causing the oil to foam.This condition could damage compressor bearings due to reduced lubrication and could cause compressor mechanical failures.

Before starting the unit in the COOLING mode, set the system switch to theOFF position andturn the mainpower disconnect to the ON position and allow the crankcase heater to operate a minimum of 8-hours.

Before closing the main power disconnect switch, ensure that the SYSTEM selection switch is in the OFF position and the FAN selection switch is in the AUTO position.

Close the main power disconnect switch and the unit mounted disconnect switch, if applicable.

Upon power initialization, the RTRM performs selfdiagnostic checks to ensure that all internal controls are functional. It also checks the configuration parameters against the components connected to the system.The Liteport LED, located on the RTRM module, is turned ON within one second of power-up if internal operation is okay.

Use one of the followingTEST procedures to bypass some time delays and to start the unit at the control panel. Each step of unit operation can be activated individually by temporarily shorting across theTEST terminals for two or three seconds.The Liteport LED will blink when the test mode has been initiated.The unit can be left in anyTEST step for up to one hour before it will automatically terminate, or it can be terminated by opening the main power disconnect switch. Once the test mode has been terminated, the Liteport LED will glow continuously and the unit will revert to the SYSTEM control.

shorting across the two test terminals for two or three seconds.

For the initial start-up of the unit, this method initiates the different components of the unit, one at a time, by temporarily shorting across the two test terminals for two or three seconds.

Resistance Test Mode: This method may be used for

start-up providing a decade box for variable resistance outputs.This method initiatesthe different components of the unit, one at a time, when a specific resistance value is placed across the two test terminals.The unit will remain in the specific test mode for approximately one hour even though the resistance is left on the test terminals.

Auto Test Mode: This method is not recommended for

start-up due to the short timing between individual component steps.This method initiates the different components of the unit, one at a time, when a jumper is installed across the test terminals.The unit will start the first test step and change to the next step every 30 seconds. At the end of the test mode, control of the unit will automatically revert to the applied SYSTEM control method.

For unit test steps, test modes and step resistance values to cycle the various components, see Table 9.

Test Modes

There are three methods in which theTEST mode may be

cycled at LTB-Test 1 and LTB-Test 2.

StepTest Mode: This method initiates the different

components of the unit, one at a time, by temporarily

WSHP-SVX12B-EN 47

Page 48

Pre-Start

Table 9. ServiceTest Guide

Test Step Mode Fan

3 CoolStage-1 ON Min Position ON(Note 1) OFF OFF OFF 4.7K

4(Note 3) CoolStage-2 ON Min Position ON(Note 1) ON (Note 1) OFF OFF 6.8K

5(Note 3) Heat Stage-1 ON Min OFF OFF ON OFF 10K

6(Note 3) HeatStage-2 ON Min OFF OFF ON ON 15K

Notes:

1. The condenser fans will operate any time a compressor is ON providing the outdoor temperatures are within the operating values.

2. The exhaust fan will turn on anytime the economizer damper position is equal to or greater than the exhaust fan setpoint.

3. Steps for optional accessories and non-applicable modes in unit will be skipped.

Fan ON

Min Ventilation ON Selectable OFF OFF OFF OFF

EconomizerTest

Open

ON OPEN OFF OFF OFF OFF 3.3K

Verifying Proper Air Flow (Units with DD

Indoor Fan)

Much of the systems performance and reliabilityis closely associated with, and dependent upon having the proper airflow supplied both to the space that is being conditioned and across the evaporator coil.

The fan motor is factory wired to operate on low speed in

the cooling and heating mode. It can be rewired for high speed operation should the application require it. Refer to the wiring diagram on the unit.

The fan motor is specifically designed to operate within

the Blower Horse Power (BHP) parameters listed inthe fan performance tables of the unit Service Facts. By understanding that these motors will safely work within these conditions, before an oversized motor is required, will allow the air distribution system to be set up properly and diagnostics enhanced should a problem occur.

When verifying direct drive fan performance, the tables

must be used somewhat differently than those of belt driven fans. Fan performance diagnostics can be easily recognized when these tables are used correctly.

Before starting the SERVICETEST, set the minimum position setpoint for the economizer to 0% using the setpoint potentiometer locatedon the Economizer Control (ECA), if applicable.

Using Table 9, momentarily jump across the Test 1 and

Test 2 terminals on LTB1 one time to start the minimum

ventilation test.

With the fan operating properly, determine the total

system external static pressure (inches w.c.) by:

1. Measuring the supply and return duct static pressure.

2. Using the accessory pressure drop table in the Service Facts, calculate the total static pressure drop for all of the accessories installed on the unit; (i.e. curb, economizer, etc.)

Econ

(Note 2) Compr 1 Compr 2 Heat 1 Heat 2 Ohms

Min Position

Setpoint 0%

OFF OFF OFF OFF

Note: Static pressure is based on desired CFM and may

not be actual static pressure.

3. Add the total accessory static pressure drop (Step 2) to the duct external static pressure (Step 1).The sum of these two values represents the total system external static pressure.

WARNING

Live Electrical Components!

During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.

4. Measure theamperage at the supply fan contactor and compare it with the full load amp (FLA) rating printed on the motor nameplate.

a. Calculate the theoretical BHP

Actual Motor Amps x Motor HP

Motor Nameplate Amps

b. Using thefan performance tablesin the unitService

Facts, plot the total external static pressure (Step 3) and the BHP (Step 4a) to obtain the operating CFM.

When plotted, if the two values can notbe interpolated

correspondingly, thestatic pressure will most likely be the least accurate measurement. Because of the direct drive motor operation, the RPM performance is relatively constant making theoperating current a very reliable diagnostic tool.

Example: GERE060 single phase, low speed

Actual Motor Amp (5.25)

Motor Nameplate Amps (5.3)

= 99%

2.2K

48 WSHP-SVX12B-EN

Page 49

0.99 x Motor HP (0.6) = .59 BHP

The actual external static pressure is approximately

0.45" w.c., airflow equals 2100 CFM.

If the static pressure reading was higher, motor current would have to be lower proportionately to get an accurate CFM measurement in direct drive applications.

5. If the required CFM is too low, (external staticpressure is high causing motor HP output to be below table value),

a. Relieve supply and/or return duct static.

b. Change indoor fan speed to HIGH and repeat steps

1 through 4.

6. If the required CFM is too high, (external static pressure is low causing motor HP output to be above table value), increase supply and/or return duct static.

7. To stop the SERVICETEST, turn the main power disconnect switch to the OFF position or proceed to the next component start-up procedure.

Verifying Proper Air Flow (Units with Belt

Drive Fan)

The fan speed is changed by opening or closing the

adjustable motor sheave.

Before starting the SERVICETEST, set the minimum position setpoint for the economizer to 0% using the setpoint potentiometer locatedon the Economizer Control (ECA), if applicable.

Using Table 9, p. 48, momentarily jump across the Test 1 andTest 2 terminals on LTB1 one time to start the minimum ventilation test.

WARNING

Rotating Components!

During installation, testing, servicing and troubleshooting of this product it may be necessary to measure the speed of rotating components. Have a qualified or licensed service individual who has been properly trained in handling exposed rotating components perform these tasks. Failure to follow all safety precautions when exposed to rotating components could result in death or serious injury.

Pre-Start

WARNING

Live Electrical Components!

2. Measure theamperage at the supply fan contactor and compare it with the full load amp (FLA) rating printed on the motor nameplate.

a. Calculate the theoretical BHP.

Actual Motor Amps x Motor HP

Motor Nameplate Amps

b. Using thefan performance tablesin the unitService

Facts, plot the total external static pressure (Step 1) and the BHP (Step 2) to obtain the operating CFM.

3. If the required CFM is too low, (external staticpressure is high causing motor HP output to be below table value),

a. Relieve supply and/or return duct static.

b. Change fan speed and repeat steps 1 and 2.

4. To increase fan RPM; Loosen the pulleyadjustment set screw and turn sheave clockwise.

5. To decrease fanRPM; Loosen the pulleyadjustment set screw ant turn sheave counterclockwise.

6. If the required CFM is too high, (external static pressure is low causing motor HP output to be above table value), change fan speed and repeat steps 1 and

7. To stop the SERVICETEST, turn the main power disconnect switch to the OFF position or proceed to the next component start-up procedure.

Fan Belt Adjustment (Units with Belt Drive Fan)

The fan belts must be inspected periodically to assure

proper unit operation.

Replacement is necessary if the belts appear frayed or worn. Units with dual belts require a matched set of belts to ensure equal belt length.

Once the supply fan has started, check for proper rotation.

The direction ofrotation is indicated by an arrow on the fan

housing. With the fan operating properly, determine the total system airflow (CFM) by;

1. Measuring the actual RPM

WSHP-SVX12B-EN 49

Page 50

Pre-Start

WARNING

Rotating Components!

When moving or installing the new belts, do not stretch

them over the sheaves. Loosen the belts using the belt tension adjustment bolts on the motor mounting base.

Once the new belts are installed, using a Browning™ or Gates™ tension gauge (or equivalent) illustrated in

Figure 31; adjust the belt tension as follows:

1. To determine the appropriate belt deflection;

a. Measure the center-to-center shaft distance (in

inches) between the fan and motor sheaves.

b. Divide the distance measure in Step 1a by 64; the

resulting value represents the amount of belt deflection that corresponds to the proper belt tension.

2. Set the large O-ring on the belt tension gauge at the deflection value determined in Step 1b.

3. Set the small O-ring at zero on the force scale of the gauge plunger.

4. Place thelarge end ofthe gauge at thecenter of thebelt span; then depress the gauge plunger until the largeOring is even with the top of the next belt or even with the straightedge placed across the fan and motor sheaves.

5. Remove the belt tension gauge.The small O-ring now indicates a number other than zero on the plunger’s force scale.This number represents the force (in pounds) required to give the needed deflection.

6. Compare the "force" scale reading (Step 5) with the appropriate "force" value listed in "force" reading is outside the range, readjust the belt tension.

Note: Actual belt deflection "force" must not exceed the

maximum force value shown in Table 10.

7. Recheck the belt tension at least twice during the first 2 to 3-days of operation. Belt tension may decrease until the new belts are "run-in".

Table 10.Ifthe

Figure 31. Belt tension gauge

Table 10. Belt tension measurement an deflection

ranges

Belts Cross Section A B

3.0 - 3.6 3.4 - 4.2

Small P.D. Range

Super Gripbelts

Gripnotch

Steel Cable Gripbelts

Min 3 4

Max 4.5 5.5

Min 3.5 5.125

Max 5 7.125

Min 4 6.375

Max 5.5 8.75

Min 3.875 5.75

Max 5.5 8

Min 4.5 6.5

Max 6.25 9.125

Min 5 7.375

Max 6.875 10.125

Min 3.25 4.5

Max 4 5.5

Min 3.75 5.75

Max 4.75 7.25

Min 4.25 7

Max 5.25 8.75

3.8 - 4.8 4.4 - 5.6

5.0 - 7.0 5.8 - 8.8

Return Air Smoke Detector

The return air smoke detector is designed to shut off the

unit if smoke is sensed in the return air stream. Sampling the airflow entering the unit at the return air opening performs this function.

In order for the smoke detector to properlysense smoke in the return airstream, the air velocity enteringthe unit must be between 500 and 4000 feet per minute. Equipment covered in this manual will developan airflow velocitythat falls within these limits over the entire airflow range specified in the fan performance tables.

50 WSHP-SVX12B-EN

Page 51

Pre-Start

There are certain models however, if operated at low

airflow, will not develop anairflow velocity that falls within the required 500 to 4000 feet per minute range. For these models, the design airflow shall be greater than or equal to the minimum CFM specified in W_C-IOM-1B manual. Failure to follow these instructions will prevent the smoke detector from performing its design function.

Economizer Start-Up

Using Table 9, p. 48 momentarily jump across the Test 1 andTest 2 terminals on LTB1 one time to start the minimum ventilation test.

1. Set the minimum position setpoint for the economizer to the required percentage of minimum ventilation using the setpoint potentiometer located on the Economizer Control (ECA).

The economizer will drive to its minimum position

setpoint, exhaust fans (if applicable) may start at random, and the supply fan will start when the SERVICETEST is initiated.

WARNING

Unexpected Fan Start Up!

The supply fan will start when ServiceTest is initiated

and the exhaust fan may start at random. The exhaust fan will start anytime the economizer damper position is equal to or greater than the exhaust fan setpoint. Leave all access panels and guards to fan sections in place when performing minimum ventilation test. Failure to follow proper procedure could result in death or serious injury.

The exhaust fan will start anytime the economizer

damper position is equal to or greater than the exhaust fan setpoint.

2. Verify that the dampers stroked to the minimum position.

3. Verify ambient sesor has been mouted into inside corner post grommet.

ReliaTel Control

1. Momentarily jump across theTest 1 and Test 2 terminals on LTB1 one additional time if continuing from previous component start-up or until the desired start-up component test is started.

2. Verify that the dampers stroked to the full open position.

3. To stop the SERVICETEST, turn the main power disconnect switch to the OFF position or proceed to the next component start-up procedure.

Compressor Start-Up

Using the service test guide in Table 9, p. 48, continue the SERVICETEST start-up procedure for each compressor circuit.

1. Attach a set of service gauges onto the suction and discharge gauge ports for each circuit. Refer to the refrigerant circuit illustration in the Service Facts.

2. Momentarily jump across the Test 1 andTest 2 terminals on the LTB one additional time if continuing from previous component start-up or until the desired start-up componentTest is started.

3. Scroll Compressors

a. Once each compressor has started, verify that the

rotation is correct. If a scroll compressor is rotating backwards, it will not pump and a loud rattling sound can be observed.

WARNING

Live Electrical Components!

b. If the electrical phasing is correct, before

condemning a compressor, interchange any two leads (at the compressorTerminal block) to check the internal phasing. Refer to p. 47 for phase sequencing. If thecompressor runs backward for an extended period (15 to 30 minutes), the motor winding can overheat and cause the motorwinding thermostat to open.

c. Check the compressor oil levels.The oil lever in

eachcompressor sight glassshould be 1/2 to3/4 full when they are OFF.

Note: The scroll compressor usesTrane OIL-42 without

substitution.The appropriate oil charge for a 9 and 10-ton scroll compressor is 8-pints. For a 14 and 15ton scroll compressor, use 14 pints.

4. After the compressor and condenser fan have started and operated for approximately 30-minutes, observe the operating pressures. Compare the operating pressures to the operating pressure curve in the Service Facts.

5. Check system superheat. Follow the instruction list on the superheat charging curve in the Service Facts.

Note: Superheat should be within ±5° F of the superheat

chart value.

6. Repeat steps 1 through 4 for each refrigerant circuit.

7. To stop the SERVICETEST, turn the main power disconnect switch to the OFF position or proceed to the next component start-up procedure.

WSHP-SVX12B-EN 51

Page 52

Pre-Start

Heating Start-up

Using Table 9, p. 48 continue the SERVICE TEST start-up procedure for each compressor circuit.

WARNING

Live Electrical Components!

1. Clamp an amp meter around one of the first stage heater power wires at the heater contactor.

2. Momentarily jump across the Test 1 andTest 2 terminals on LTB one additional time if continuing from previous component start-up or until the desired start-up component test is started.

3. Verify that the heater stage is operating properly.

4. Clamp an amp meter around one of the two stage heater power wires at the heater contactor (if applicable).

5. Momentarily jump across the test 1 and test 2 terminals on LTB one additional time if continuing from previous component start-up or until the desired start-up component test is started.

6. Verify that the heater stage is operating properly.

7. To stop the SERVICETEST, turn the main power disconnect switch to the OFF position or proceed to the next component start-up procedure.

Pre-Startup Checklist

Before energizing the unit, the following system devices must be checked:

• Check all electrical connections for tightness and point of termination accuracy.

• Is the high voltage power supply correct and in accordance with the nameplate ratings?

• Is phasing of the unit correct per compressor rotation?

• Is the field wiring and circuit protection the correct size?

• Is the low voltage control circuit wiring correct per the unit wiring diagram?

• Is the piping system clean/complete and correct? (A recommendation of all system flushing of debris from the water-to-refrigerant heat exchanger, along with air purging from the water-to-refrigerant heat exchanger be done in accordance with the Closed-Loop/Ground Source Heat Pump Systems Installation Guide).

• Is unit serviceable? (See section “Unit Clearances,”

p. 10 for clearance recommendations.)

52 WSHP-SVX12B-EN

• Are the low/high-side pressure temperature caps secure and in place?

• Is the thermostat in the OFF position?

• Is the water flow established and circulating through all the units?

• Is the duct work correctly sized, run, taped, insulated and weather proofed with proper unit arrangement?

• Is the condensate line properly sized, run, trapped and pitched?

• Is the zone sensor (when used) correctly wired and in a proper location?

• Does the indoor blower turn freely without rubbing and is it properly tightened on the shaft? Check the supply fan belts (if applicable) for proper tension and the fan bearings for sufficient lubrication. If the belts require adjustment, or if the bearings need lubricating, refer to the maintenance section for instructions.

• Has all work been done in accordance with applicable local and national codes?

• Has heat transfer fluid been added in the proper mixto prevent freezing in closed system application?

• Are all the unitaccess panels secure and in place? And, is unit interior free from tools or debris?

• Verifythat the Remote panelSYSTEMselection switch, FAN selection switch, and ZONETEMPERATURE settings for automatic operation are correct.

• Is the main disconnect switch or circuit protector switch that provides the supply power to the unit’s terminal block or the unit mounted disconnect switch closed?

• Is the Night Setback panel (if applicable) programmed for proper unoccupied operation?

• For units with economizer option verify ambient sensor is mounted inside corner post grommet.

Page 53

Start Up

Use this form to thoroughly check-out the system and units before and during start-up. (This form need not be returned to the factory unless requested during technical service support).

Job Name:

Model Number:

Date:

Serial Number:

In order to minimize troubleshooting and costly system failures, complete the following checks and data entries before the system is put into full operation.

MODE Heat Cool

Entering fluid temperature degrees F

Leaving fluid temperature degrees F

Temperature differential degrees F

Return air temperature DB/WB degrees F

Supply air temperature DB/WB degrees F

Temperature differential degrees F

Water coil heat exchanger (Water Pressure IN) PSIG

Water coil heat exchanger (Water Pressure OUT) PSIG

Pressure Differential PSIG

COMPRESSOR

Amps

Volts

Discharge line temperature (after 10 minutes) degrees F

Initial Unit Start-up

Start-up with the conventional thermostat is included below:

1. Set the thermostat to the highest position.

2. Set thethermostat systemswitch to COOL with the fan control to AUTO. The compressor should NOT run.

3. Reduce the thermostat setting until the compressor, reversing valve, solenoid valve, and loop pump are energized. Adjust water flow utilizing pressure/ temperature plugs and comparing to tables contained in specification sheet data. Water leaving the heat exchanger should be warmer than the entering water temperature (approximately 9°F-12°F); blower operation should be smooth; compressor and blower amps should be within data plate ratings; the suction line should be cool with no frost observed in the refrigerant circuit.

4. Check the cooling refrigerant pressures.

5. Turn the thermostatsystem switch to theOFF position. Unit should stop running and the reversing valve should de-energize.

6. Leave unit off for approximately FIVE minutes to allow for pressure equalization.

7. Turn the thermostat to the lowest setting.

8. Set thethermostat systemswitch to the HEAT position.

9. Adjust the temperature setting upward until the unit is energized. Warm air should blow from the register. A water temperature decrease of approximately 5° Fto 9° F leaving the heat exchanger should be noted.The blower and compressor operation should be smooth with no frost observed in the refrigeration circuit.

10. Check the heating refrigerant pressures.

11. Set the thermostat to maintain the desired space temperature.

12. Instruct the owner on system operation.

WSHP-SVX12B-EN 53

Page 54

Start Up

Water Pressure Drop

Table 11 and Table 12 should be used to define feet of

head/pressure drop. Please note the feet of pressure (ft/ head) provided is at ARI/ISO standard.

Note: To calculate feet of head, when using gauges that

read in PSIG, multiply PSI by 2.31.

Table 11. Cooling water pressure drops (WPD) in feet of

head

Unit Size EWTF GPM Ft.Pressure

036 86 9.0 11.0

048 86 12.0 9.0

060 86 15.0 13.3

072 86 18.0 11.4

090 86 22.5 12.1

120 86 30.0 15.2

150 86 37.5 13.7

180 86 45 19.3

240 86 60 13.2

300 86 75 13.1

Table 12. Heating water pressure drops (WPD) in feet of

head

Unit Size EWTF GPM Ft. Pressure

036 68 9.0 12.0

048 68 12.0 9.7

060 68 15.0 14.3

072 68 18.0 12.3

090 68 22.5 13.1

120 68 30.0 16.4

150 68 37.5 14.8

180 68 45 20.8

240 68 60 14.3

Table 13. Water volume

Water Side

Unit Size

036 76 .044 .329

048 171 .099 .74

060 171 .099 .74

072 259 .15 1.121

090 210 .122 .910

120 342 .198 1.48

150 508 .296 2.201

180 508 2.96 2.201

240 779 .453 3.374

300 1057 .615 4.576

Volume Cubic

In.

54 WSHP-SVX12B-EN

Water Side

Volume Cubic

Ft.

Water Side

Volume Gallons

Page 55

Maintenance

Preventive Maintenance

Maintenance on the unit is simplified with the following preventive suggestions:

Filter maintenance must be performed to assure proper operation of the equipment. Filters should be inspected at least every three months, and replaced when it is evident they are dirty. Filter sizing includes:

Table 14. Filter sizing

Unit Size

036-048 2/ 20 x 30 x 1

060 4/16 x 25 x 2

072-090 4/ 16 x 25 x 2

120 4/ 20 x 25 x 2

150, 180, 300 Downflow

150, 180, 300 Horizontal

240 Downflow

240 Horizontal 12/20 x 20 x 2

Hazardous Voltage!

Filter Size nominal inch

4/20 x 20 x 2

4/20 x 25 x 2

8/20 x 25 x 2

8/20 x 20 x 2

4/20 x 16 x 2

WARNING

Hazardous Chemicals!

Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper handling should include goggles or face shield, chemical resistant gloves, boots, apron or suit as required. For personal safety, refer to the cleaning agent manufacturers Materials Safety Data Sheet and follow all recommended safe handling practices. Failure to follow all safety instructions could result in death or serious injury.

It should be noted that the water quality shouldbe checked periodically. (See Table 15).

Table 15. Water quality

Scaling

Calcium and magnesium (total hardness) Less than 350 ppm

Corrosion

pH Hydrogen Sulfide Sulfates Chlorides Carbon Dioxide Total dissolved solids (TDS)

Biological Growth

Iron Bacteria Low

Erosion

Suspended Solids Low

Note: Forother maintenance information concerning the

GERA unit, please read W_C-IOM-1*.

7-9.5 Less than 1 ppm Less than 25 ppm Less than 125 ppm Less than 75 ppm Less than 1000 ppm

Check the contactors and relays within the control panel at least once a year. It is good practice to check the tightness of the various wiring connections within the control panel.

A strainer (60 mesh or greater) must be used on an open loop system to keep debris from entering the unit heat exchanger and to ensure a clean system.

For units on well water, it is important to check the cleanliness of the water-to-refrigerant heat exchanger. Should it become contaminated with dirt and scaling as a result of bad water, the heat exchanger will have to be back flushed and cleaned with a chemical that will remove the scale.This service should be performedby an experienced water treatment specialist.

WSHP-SVX12B-EN 55

Page 56

Troubleshooting

WARNING

Hazardous Service Procedures!

The maintenance and trouble shooting procedures

recommended in this section of the manual could result in exposure to electrical, mechanical or other potential safety hazards. Always refer to the safety warnings provided throughout this manual concerning these procedures.When possible, disconnect all electrical power including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been trained in handling live electrical components per these tasks. Failure to follow all of the recommended safety warnings provided, could result in death or serious injury.

Table 16. Troubleshooting

Problem Heating Cooling Cause Correction

X X Main power off Check fuses

No response to any thermostat setting

Unit short cycles X X Thermostat or sensor improperly located Relocate

Blower runs, but compressor does not

Insufficient capacity

X X Defective control transformer Replace

X X Broken or loose connection Repair

X X Defective thermostat Replace

X X Transformer Reset Transformer

X X Defective compressor overload Replace (if external)

X X Defective compressor contactor Replace

X X Supply Voltage too low Correct

X X Defective compressor capacitor Replace

X X Defective windings Replace

X X Limit switches open Check cause/Replace or repair

X X Dirty filter Replace/clean

X X Blower RPM too low Correct

X Introduction of excessively cold return air Correct

X X Low on refrigerant charge

X X Restricted thermal expansion valve Replace

X X Defective reversing valve See WSHP-IOM-# for touch test chart

X X Thermostat improperly located Relocate

X X Unit undersized Recalculate heat gains/losses

X X Inadequate water flow Increase GPM

X X Scaling in heat exchanger Clean or replace

X Water too cold Increase temperature

Loss of conditioned air due to leaks in ductwork

X Introduction of excessively hot return air Correct

X Water too hot Decrease temperature

Repair leaks

Locate leak, repair and recharge by weight (not by superheat)

56 WSHP-SVX12B-EN

Page 57

Table 16. Troubleshooting (continued)

Problem Heating Cooling Cause Correction

X Inadequate GPM Increase water flow to unit

X Water too hot Decrease temperature

High pressure switch open

High head pressure

Low suction pressure

Low Pressure switch open

X Inadequate air flow Check, clean blower and coil

X Dirty filter Clean/replace

X X Overcharged with refrigerant Decrease charge

X X Defective pressure switch Check or replace

X Trash in heat exchanger Backflush

X Low water flow Increase GPM

X X Overcharge of refrigerant Decrease charge

X X Non-condensable in system Evacuate and recharge by weight

X X Water too hot Decrease temperature

X Dirty filter Clean / replace

X Inadequate air flow Check, clean blower and coil

X X Undercharged Locate leak, repair and recharge

X X Restricted thermal expansion valve Repair / replace

X Inadequate air flow Check, clean blower and coil

X Dirty filter Clean/replace

X Inadequate GPM Increase GPM

X Water too cold Increase temperature

X Inadequate air flow Increase CFM

X Dirty filter Clean/replace

X X Undercharged with refrigerant Increase charge

X X Defective pressure switch Replace

X X Heat transfer fluid too cold Raise water temperature

Troubleshooting

WSHP-SVX12B-EN 57

Page 58

Warranty

Standard Warranty

The standard water-source heat pump warranty isTrane

parts-only warranty, running 12 months from startup, not to exceed 18-months from shipment.

Extended Warranty

The optional extended warranty is a second through fifth

year warranty.The time starts at the end of the standard 1year coverage through the fifth year.

These extended warranties apply only to new equipment

installed in domesticTrane Commercial Systems Group sales territories and must be ordered prior to start-up.

58 WSHP-SVX12B-EN

Page 59

Page 60

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in

creating and sustaining safe, comfortable and energy efficient environments,Trane offers a broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com.

Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

WSHP-SVX12B-EN 01 Aug 2013

Supersedes WSHP-SVX12A-EN (30 Apr 2012)

We are committed to using environmentally

conscious print practices that reduce waste.

Trane GER-036, GER-048, GER-060, GER-072, GER-090 Installation and Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Warnings, Cautions and Notices

Introduction

Model Number Descriptions

General Information

Jobsite Inspection

Jobsite Storage

Unit Description

System Input Devices and Functions

Field installed ONLY Accessories

Component Location

Dimensions

Unit Clearances

Installation

General Installation Checks

Main Electrical Power Requirements

Foundation for Rooftop Units

Ductwork

Roof Curbs

Rigging the Unit

Supply/Return Pipe

Drain Connection

Horizontal Discharge Conversion

TCO-A Instructions

Field Installed Power Wiring

Field Installed Control Wiring

Control PowerTransformer

Electrical Requirements

Pre-Start

Space Temperature Averaging

Test Modes

Pre-Startup Checklist

Start Up

Initial Unit Start-up

Water Pressure Drop

Maintenance

Preventive Maintenance

Troubleshooting

Warranty

Standard Warranty

Extended Warranty