Trane Rooftop Wshp Installation And Maintenance Manual

2015-04-02

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SAFETY WARNING

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-

conditioning 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.

Water-Source Comfort System

Axiom™ Rooftop

Installation, Operation,

and Maintenance

Models “E” and later Design Sequence

60HZ GER -036, -048, -060, -072, -090, -120, -150, -180, -240,-300

WSHP-SVX12B-EN

August 2013

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 potential hazards 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 thoroughly before operating or servicing

this unit.

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 handling of

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.

ATTENTION: Warnings, Cautions, and Notices appear at

appropriate sections throughout this literature. Read

these carefully:

WARNING Indicates a potentially hazardous

situation which, if not avoided, could

result in death or serious injury.

CAUTIONsIndicates 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.

NOTICE: Indicates a situation that could result in

equipment or property-damage only

accidents.

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 Protective Equipment (PPE)

recommended for the work being undertaken.

ALWAYS refer to 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 non-

approved refrigerants, refrigerant substitutes, or

refrigerant additives could result in death or serious

injury or equipment damage.

Warnings, Cautions and Notices

WSHP-SVX12B-EN 3

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.

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.

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.

4 WSHP-SVX12B-EN

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

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

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

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

WSHP-SVX12B-EN 5

Model Number Descriptions

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 = 15Ton

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 SensingTube

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 — Filter Type

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

To The Rooftop Product

0000000= 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.

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

6 WSHP-SVX12B-EN

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 the bill 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.

• 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 air openings, 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 nameplate is located on the units’s corner support

just above the main power entrance 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 humidity conditions 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.

General Information

WSHP-SVX12B-EN 7

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 for that 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 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.

RTOM-ReliaTel Options Module (option)

The RTOM monitors the supply fan proving, 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 is at 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 2-

minutes.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.

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

General Information

8 WSHP-SVX12B-EN

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 high discharge 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 limit shutdown of the

unit and requires a manual reset.The sensor is used to

detect high temperatures due to fire in 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.

Electronic Timeclock (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 a manual changeover control

with single setpoint capability.

Zone Panel (BAYSENS108A)

This electronic sensor features four system switch settings

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

AUTO). It is a manual or auto changeover control with dual

setpoint capability. It can be used with a remote zone

temperature sensor BAYSENS017B.

Remote Panel w/o NSB (BAYSENS110A)

This electronic sensor features four system switch settings

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

and

AUTO) with four system status LED’s. It is a manual or 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 96-

degrees 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.

General Information

WSHP-SVX12B-EN 9

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

10 WSHP-SVX12B-EN

Dimensions

Unit Clearances

Dimensions

WSHP-SVX12B-EN 11

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

12 WSHP-SVX12B-EN

Figure 2. 060 to 072 Clearances

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)

Dimensions

WSHP-SVX12B-EN 13

Figure 3. 090 Clearances

7½ tons power exhaust 7½ tons swing diameter for hinged door(s) option

Note: All dimensions are in inches/millimeters. 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

14 WSHP-SVX12B-EN

Figure 4. 120 Clearances

10 tons exhaust 10 tons swing diameter for hinged door(s) option

Note: All dimensions are in inches/millimeters. 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)

Dimensions

WSHP-SVX12B-EN 15

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

16 WSHP-SVX12B-EN

Figure 6. 3 to 4-Ton Unit

Dimensions

WSHP-SVX12B-EN 17

Figure 7. 5 -Ton Unit

Dimensions

18 WSHP-SVX12B-EN

Figure 8. 6 -Ton Unit

Dimensions

WSHP-SVX12B-EN 19

Figure 9. 7 1/2-Ton Unit

Dimensions

20 WSHP-SVX12B-EN

Figure 10. 10 -Ton Unit

Dimensions

WSHP-SVX12B-EN 21

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

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

12 5/16"

313mm

20 13/16"

529mm

26 7/8"

684mm

54"

1372mm

23"

584mm

Dimensions

22 WSHP-SVX12B-EN

Figure 12. 20-Ton Unit

20 7/8"

530mm

12 1/2"

317mm

24 1/4"

616mm

Dimensions

WSHP-SVX12B-EN 23

Figure 13. 25-Ton Unit

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

64”

1626 mm

20 13/16"

529mm

12 5/16"

313mm

85 5/16"

2167mm

54"

1372mm

26 7/8"

264mm

Dimensions

24 WSHP-SVX12B-EN

Figure 14. 3 to 4-Ton Roofcurb

Dimensions

WSHP-SVX12B-EN 25

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

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

12 5/16"

313mm

20 13/16"

529mm

26 7/8"

684mm

54"

1372mm

23"

584mm

Dimensions

26 WSHP-SVX12B-EN

Figure 16. 10 -Ton Roofcurb

20 7/8"

530mm

12 1/2"

317mm

24 1/4"

616mm

Dimensions

WSHP-SVX12B-EN 27

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

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

64”

1626 mm

20 13/16"

529mm

12 5/16"

313mm

85 5/16"

2167mm

54"

1372mm

26 7/8"

264mm

Dimensions

28 WSHP-SVX12B-EN

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

Table 1. Typical unit weights and point loading data

Net

Weight

Corner Weights Center of Gravity

Model A B C D Length Width

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

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

Center

of Gravity

Length

nter of Gravity

Width

Center of Gravity

Figure 19. Rigging

Dimensions

WSHP-SVX12B-EN 29

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

30 WSHP-SVX12B-EN

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.

• Assemble and install the roof curb (if applicable). Refer

to the latest edition of the curb installers guide that

ships with each curb kit.

• Fabricate and install duct 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-inch filters.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

• 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 the main 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. Provide concrete footings at

each support location with a full perimeter support

structure or a slab foundation for support. Refer to Table 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.

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

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.

Installation

WSHP-SVX12B-EN 31

If anchoring is required, anchor the unit to the roof with

hold-down bolts or isolators.

Check with the contractor for proper waterproofing

procedures.

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

• Verify that the roof curb includes the necessary 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 top surface

of the curb must be true to assure an adequate curb-to-

unit 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 when the 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.

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.

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 also recommended to separate the closed/open

loop from the mechanical device.

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.

Installation

32 WSHP-SVX12B-EN

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 panel and 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 the original 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 support is 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 the grommeted 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 double-

trap condition which could result in condensate backup

due to air lock.

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 20.

Figure 21. Gasket Installation

Installation

WSHP-SVX12B-EN 33

3. Position duct covers. Rotate the supply duct cover 90-

degrees to allow it to be slid into the supply opening.

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 the duct 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.

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 the duct 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. ReplaceTCO-

A 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 replacementTCO-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 two screws 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.

Figure 22. Duct cover with gasket installed

Figure 23. Installing duct cover

Installation

34 WSHP-SVX12B-EN

Field Installed Power Wiring

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.

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 Figure 24, p. 34.

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) or circuit 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.

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.

Control Power Transformer

The 24-volt control power transformers are to be used only

with the accessories called out in this manual.

Transformers rated greater than 50 VA are equipped with

internal circuit breakers. If a circuit breaker trips, turn OFF

all power to the unit before attempting to reset it.

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.

Figure 24. Electrical entrance

Installation

WSHP-SVX12B-EN 35

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.

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.

Figure 25.

Installation

36 WSHP-SVX12B-EN

Figure 26.

Installation

WSHP-SVX12B-EN 37

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 that the 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.

Controls using DC Analog Input/Outputs

(Standard Low Voltage 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.

Note: Resistance in 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.

Figure 27. Wire Routing

Table 4. 24V AC conductors

Distance from unit

to Control

Recommended Wire

Size

000-460 feet 18 gauge

461-732 feet 16 gauge

733-1000 feet 14 gauge

Table 5. DC conductors; zone sensor module wiring

Distance from unit to

Control

Recommended Wire

Size

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

38 WSHP-SVX12B-EN

Electrical Requirements

Table 6. Electrical perfomance

Model No. Unit Volts

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

GERE036

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

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

GERE048

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

GERE060

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

GERE072

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

GERE090

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

GERE120

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

Electrical Requirements

WSHP-SVX12B-EN 39

GERE150

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

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

GERE180

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

GERE240

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

GERE300

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

Table 6. Electrical perfomance

Model No. Unit Volts

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

Electrical Requirements

40 WSHP-SVX12B-EN

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

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

Heater Model

Number

Electric Heat

Amps

Electric Heat

Control

Stages

Mimimum

Circuit

Ampacity

Max

Overcurrent

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

208 Volt Single Phase ——

GERE036

BAYHTRE105* 18.3 3.8 1 52.1 60 — —

BAYHTRE110* 36.1 7.5 2 74.4 80 — —

BAYHTRE114* 50.0 10.4 2 91.8 100 — —

GERE048

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 — —

GERE060

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

GERE036

BAYHTRE105* 20.8 5.0 1 55.3 60 — —

BAYHTRE110* 41.7 10.0 2 81.4 90 — —

BAYHTRE114* 57.5 13.8 2 101.1 110 — —

GERE048

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 — —

GERE060

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

GERE036

BAYHTRE306* 12.5 4.5 1 37.5 45 — —

BAYHTRE312* 25.0 9.0 2 53.1 60 — —

BAYHTRE318* 36.4 13.1 2 67.4 70 — —

GERE048

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 — —

GERE060

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 — —

GERE072

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

GERE090

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

Electrical Requirements

WSHP-SVX12B-EN 41

GERE120

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 — —

GERE150

AYDHTRK318/

AYHHTRM318 37.5 13.5 1 107.9 110 114.0 125

AYDHTRK336/

AYHHTRM336 74.9 27.0 2 154.6 175 160.7 175

AYDHTRK354/

AYHHTRM354 112.4 40.5 2 201.5 225 207.6 225

GERE180

AYDHTRK318/

AYHHTRM318 37.5 13.5 1 113.7 125 119.8 125

AYDHTRK336/

AYHHTRM336 74.9 27.0 2 160.5 175 166.6 175

AYDHTRK354/

AYHHTRM354 112.4 40.5 2 207.4 225 213.5 225

GERE240

AYDHTRL336/

AYHHTRN336 74.9 27.0 2 198.3 200 199.2 200

AYDHTRL354/

AYHHTRN354 112.4 40.5 2 245.2 250 246.1 250

AYDHTRK372/

AYHHTRN372 149.9 54.0 2 292.1 300 293.0 300

GERE300

AYDHTRL336/

AYHHTRN336 74.9 27.0 2 205.8 225 — —

AYDHTRL354/

AYHHTRN354 112.4 40.5 2 252.7 300 — —

AYDHTRK372/

AYHHTRN372 149.9 54.0 2 299.6 300 — —

230 Volt Three Phase

GERE036

BAYHTRE306* 14.4 6.0 1 39.9 45 — —

BAYHTRE312* 28.9 12.0 2 58.0 60 — —

BAYHTRE318* 41.9 17.4 2 74.3 80 — —

GERE048

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 — —

GERE060

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 — —

GERE072

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

GERE090

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

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

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

Heater Model

Number

Electric Heat

Amps

Electric Heat

Control

Stages

Mimimum

Circuit

Ampacity

Max

Overcurrent

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

Electrical Requirements

42 WSHP-SVX12B-EN

GERE120

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 — —

GERE150

AYDHTRK318/

AYHHTRM318 43.3 18.0 1 115.1 125 121.2 125

AYDHTRK336/

AYHHTRM336 86.6 36.0 2 169.3 175 175.4 200

AYDHTRK354/

AYHHTRM354 129.9 54.0 2 223.4 225 229.5 250

GERE180

AYDHTRK318/

AYHHTRM318 43.3 18.0 1 121.0 125 127.1 150

AYDHTRK336/

AYHHTRM336 86.6 36.0 2 175.1 200 181.2 200

AYDHTRK354/

AYHHTRM354 129.9 54.0 2 229.2 250 235.3 250

GERE240

AYDHTRL336/

AYHHTRN336 86.6 36.0 2 212.9 225 213.8 225

AYDHTRL354/

AYHHTRN354 129.9 54.0 2 267.1 300 268.0 300

AYDHTRK372/

AYHHTRN372 173.2 72.0 2 321.2 300 322.1 300

GERE300

AYDHTRL336/

AYHHTRN336 86.6 36.0 2 220.4 225 — —

AYDHTRL354/

AYHHTRN354 129.9 54.0 2 274.6 300 — —

AYDHTRK372/

AYHHTRN372 173.2 72.0 2 328.7 300 — —

460 Volt Three Phase

GERE036

BAYHTRE406* 7.2 6.0 1 19.5 20 — —

BAYHTRE412* 14.4 12.0 2 28.5 30 — —

BAYHTRE418* 20.9 17.4 2 36.6 40 — —

GERE048

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 — —

GERE060

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 — —

GERE072

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

GERE090

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

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

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

Heater Model

Number

Electric Heat

Amps

Electric Heat

Control

Stages

Mimimum

Circuit

Ampacity

Max

Overcurrent

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

Electrical Requirements

WSHP-SVX12B-EN 43

GERE120

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 — —

GERE150

AYDHTRK418/

AYHHTRM418 21.7 18.0 1 55.8 60 58.6 60

AYDHTRK436/

AYHHTRP436 43.3 36.0 2 82.8 90 85.6 90

AYDHTRK454/

AYHHTRM454 65.0 54.0 2 109.9 110 112.7 125

GERE180

AYDHTRK418/

AYHHTRM418 21.7 18.0 1 60.1 70 62.9 70

AYDHTRK436/

AYHHTRP436 43.3 36.0 2 87.1 90 89.9 90

AYDHTRK454/

AYHHTRM454 65.0 54.0 2 114.2 125 117.0 125

GERE240

AYDHTRL436/

AYHHTRN436 43.3 36.0 2 100.7 110 101.7 110

AYDHTRL454/

AYHHTRN454 65.0 54.0 2 127.8 150 128.8 150

AYDHTRK472/

AYHHTRN472 86.6 72.0 2 154.8 175 155.8 175

GERE300

AYDHTRL436/

AYHHTRN436 43.3 36.0 2 107.0 110 — —

AYDHTRL454/

AYHHTRN454 65.0 54.0 2 134.1 150 — —

AYDHTRK472/

AYHHTRN472 86.6 72.0 2 161.1 175 — —

575 Volt Three Phase

GERE036

BAYHTREW06* 5.8 6.0 1 15.3 20 — —

BAYHTREW12* 11.5 12.0 2 22.5 25 — —

BAYHTREW18* 16.7 17.4 2 29.0 30 — —

GERE048

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 — —

GERE060

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 — —

GERE072

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

GERE090

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

GERE120

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 — —

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

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

Heater Model

Number

Electric Heat

Amps

Electric Heat

Control

Stages

Mimimum

Circuit

Ampacity

Max

Overcurrent

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

Electrical Requirements

44 WSHP-SVX12B-EN

GERE150

AYDHTRKW18/

AYHHTRMW18 17.3 18.0 1 43.3 45 45.5 50

AYDHTRKW36/

AYHHTRMW36 34.6 36.0 2 64.9 70 67.1 70

AYDHTRKW54/

AYHHTRMW54 52.0 54.0 2 86.7 90 88.9 90

GERE180

AYDHTRKW18/

AYHHTRMW18 17.3 18.0 1 48.7 50 50.9 60

AYDHTRKW36/

AYHHTRMW36 34.6 36.0 2 70.3 80 72.5 80

AYDHTRKW54/

AYHHTRMW54 52.0 54.0 2 92.1 100 94.3 100

GERE240

AYDHTRLW36/

AYHHTRNW36 34.6 36.0 2 84.0 90 84.9 90

AYDHTRLW54/

AYHHTRNW54 52.0 54.0 2 105.8 110 106.7 110

AYDHTRKW72/

AYHHTRNW72 69.3 72.0 2 127.4 150 128.3 150

GERE300

AYDHTRMW36/

AYHHTRMW36 34.6 36.0 2 86.9 90 — —

AYDHTRLW54/

AYHHTRNW54 52.0 54.0 2 108.7 110 — —

AYDHTRKW72/

AYHHTRNW72 69.3 72.0 2 130.3 150 — —

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

Standard Indoor Motor Oversized Indoor Motor

Unit Model

Number

Heater Model

Number

Electric Heat

Amps

Electric Heat

Control

Stages

Mimimum

Circuit

Ampacity

Max

Overcurrent

Protection

Mimimum

Circuit

Ampacity

Max

Overcurren

t Protection

WSHP-SVX12B-EN 45

Pre-Start

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.

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 #2 illustrates three sensors squared in a series/

parallel circuit. Using BAYSENS032*, two sensors are

required to accomplish space temperature averaging.

Example #3 illustrates the circuit required for this sensor.

Figure 28. Example 1

ZSM REMOTE SENSORS

#1 #2 #3 #4

11112222

REMOTE SENSOR

2#1#

REMOTE SENSOR

ZSM

TERMINAL

ZSM

Figure 29. Example 2

REMOTE SENSORS

ZSM

2112

TERMINAL

ZSM ZSM

TERMINAL

#2 #3

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

SENSOR

REMOTE

#6#5

12 1 2

2112

#8 #9

Figure 30. Example 3

REMOTE SENSORS

ZSM

TERMINAL

MSZMSZ

TERMINAL

#1 #2

Pre-Start

46 WSHP-SVX12B-EN

Table 8 lists the temperature versus resistance coefficient

for all sensors.

Voltage Imbalance

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.

Each reading must fall within the utilization range listed on

the unit nameplate. If any of the readings 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:

where;

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:

VD (reading farthest from average) = 221

The percentage of Imbalance equals:

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

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:

1. Turn the field supplied disconnect switch that provides

power to the main power terminal block or to the Line

side of the optional factory mounted disconnect 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

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 indicator lights on the

face of the sequencer.The ABC indicator light will glow

Table 8. Temp vs. Resistance

Degrees

Nominal

Resistance

K-Ohms

Degrees

Nominal

Resistance

K-Ohms

-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

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.

% Voltage Imbalance = 100 x AV - VD

AV (average voltage) = Volt 1 + Volt 2 + Volt 3

221+230+227 = 226 Avg.

100 x 226 - 221 = 2.2%

226

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.

Pre-Start

WSHP-SVX12B-EN 47

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 the OFF position and turn the main power

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 self-

diagnostic 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.

Test Modes

There are three methods in which theTEST mode may be

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

Step Test Mode: 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.

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 initiates the 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.

Pre-Start

48 WSHP-SVX12B-EN

Verifying Proper Air Flow (Units with DD

Indoor Fan)

Much of the systems performance and reliability is 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 in the 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 located on the Economizer Control

(ECA), if applicable.

Using Table 9, momentarily jump across theTest 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.)

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.

4. Measure the amperage 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

b. Using the fan performance tables in the unit Service

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 not be interpolated

correspondingly, the static pressure will most likely be

the least accurate measurement. Because of the direct

drive motor operation, the RPM performance is

relatively constant making the operating current a very

reliable diagnostic tool.

Example: GERE060 single phase, low speed

Table 9. ServiceTest Guide

Test Step Mode Fan

Econ

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

1Fan ON Min Position

Setpoint 0% OFF OFF OFF OFF 2.2K

Min Ventilation ON Selectable OFF OFF OFF OFF

2EconomizerTest

Open ON OPEN OFF OFF OFF OFF 3.3K

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.

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.

Actual Motor Amps x Motor HP

Motor Nameplate Amps

Actual Motor Amp (5.25) = 99%

Motor Nameplate Amps (5.3)

Pre-Start

WSHP-SVX12B-EN 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 static pressure

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)

Much of the systems performance and reliability is 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 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 located on the Economizer Control

(ECA), if applicable.

Using Table 9, p. 48, momentarily jump across theTest 1

andTest 2 terminals on LTB1 one time to start the

minimum ventilation test.

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

The direction of rotation 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

2. Measure the amperage 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.

b. Using the fan performance tables in the unit Service

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 static pressure

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 pulley adjustment set

screw and turn sheave clockwise.

5. To decrease fan RPM; Loosen the pulley adjustment 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.

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.

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.

Actual Motor Amps x Motor HP

Motor Nameplate Amps

Pre-Start

50 WSHP-SVX12B-EN

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 the large end of the gauge at the center of the belt

span; then depress the gauge plunger until the large O-

ring 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 Table 10.Ifthe

"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".

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 properly sense smoke in

the return air stream, the air velocity entering the unit must

be between 500 and 4000 feet per minute. Equipment

covered in this manual will develop an airflow velocity that

falls within these limits over the entire airflow range

specified in the fan performance tables.

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.

Figure 31. Belt tension gauge

Table 10. Belt tension measurement an deflection

ranges

Belts Cross Section A B

Small P.D. Range

3.0 - 3.6 3.4 - 4.2

3.8 - 4.8 4.4 - 5.6

5.0 - 7.0 5.8 - 8.8

Super 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

Gripnotch

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

Steel Cable

Gripbelts

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

Pre-Start

WSHP-SVX12B-EN 51

There are certain models however, if operated at low

airflow, will not develop an airflow 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 theTest 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.

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 theTest 1 and Test 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.

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 the compressor runs backward for an

extended period (15 to 30 minutes), the motor

winding can overheat and cause the motor winding

thermostat to open.

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

each compressor sight glass should be 1/2 to 3/4 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 15-

ton 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.

WARNING

Unexpected Fan Start Up!

The supply fan will start when Service Test 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.

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.

Pre-Start

52 WSHP-SVX12B-EN

Heating Start-up

Using Table 9, p. 48 continue the SERVICETEST start-up

procedure for each compressor circuit.

1. Clamp an amp meter around one of the first stage

heater power wires at the heater contactor.

2. Momentarily jump across theTest 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.

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.)

• 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 mix to

prevent freezing in closed system application?

• Are all the unit access panels secure and in place? And,

is unit interior free from tools or debris?

• Verify that the Remote panel SYSTEM selection 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.

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.

WSHP-SVX12B-EN 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).

In order to minimize troubleshooting and costly system

failures, complete the following checks and data entries

before the system is put into full operation.

Initial Unit Start-up

Start-up with the conventional thermostat is included

below:

1. Set the thermostat to the highest position.

2. Set the thermostat system switch 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 thermostat system switch to the OFF 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 the thermostat system switch 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° F to 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.

Job Name:

Model Number:

Date:

Serial Number:

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

Start Up

54 WSHP-SVX12B-EN

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

Unit Size

Water Side

Volume Cubic

In.

Water Side

Volume Cubic

Ft.

Water Side

Volume Gallons

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

WSHP-SVX12B-EN 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:

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 performed by an experienced

water treatment specialist.

It should be noted that the water quality should be checked

periodically. (See Table 15).

Note: For other maintenance information concerning the

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

Table 14. Filter sizing

Unit Size

Filter Size

nominal inch

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

4/20 x 20 x 2

4/20 x 25 x 2

150, 180, 300

Horizontal 8/20 x 25 x 2

240 Downflow 8/20 x 20 x 2

4/20 x 16 x 2

240 Horizontal 12/20 x 20 x 2

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.

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.

Table 15. Water quality

Scaling

Calcium and magnesium (total hardness) Less than 350 ppm

Corrosion

Hydrogen Sulfide

Sulfates

Chlorides

Carbon Dioxide

Total dissolved solids (TDS)

7-9.5

Less than 1 ppm

Less than 25 ppm

Less than 125 ppm

Less than 75 ppm

Less than 1000 ppm

Biological Growth

Iron Bacteria Low

Erosion

Suspended Solids Low

56 WSHP-SVX12B-EN

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

No response to any

thermostat setting

X X Main power off Check fuses

X X Defective control transformer Replace

X X Broken or loose connection Repair

X X Defective thermostat Replace

X X Transformer Reset Transformer

Unit short cycles X X Thermostat or sensor improperly located Relocate

Blower runs, but compressor

does not

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

Insufficient capacity

X X Dirty filter Replace/clean

X X Blower RPM too low Correct

Loss of conditioned air due to leaks in

ductwork Repair leaks

X Introduction of excessively hot return air Correct

X Introduction of excessively cold return air Correct

X X Low on refrigerant charge Locate leak, repair and recharge by weight

(not by superheat)

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 hot Decrease temperature

X Water too cold Increase temperature

Troubleshooting

WSHP-SVX12B-EN 57

High pressure switch open

X Inadequate GPM Increase water flow to unit

X Water too hot Decrease temperature

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

High head pressure

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

Low suction pressure

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

Low Pressure switch open

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

Table 16. Troubleshooting (continued)

Problem Heating Cooling Cause Correction

58 WSHP-SVX12B-EN

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 1-

year 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.

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.

We are committed to using environmentally

conscious print practices that reduce waste.

WSHP-SVX12B-EN 01 Aug 2013

Supersedes WSHP-SVX12A-EN (30 Apr 2012)

Trane Rooftop Wshp Installation And Maintenance Manual

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