Trane Rauj Cauj 20 To 120 Tons Installation And Maintenance Manual SS SVX11H EN (10/2012)

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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.

Remote Split System Units

and Remote Chillers

Air Cooled Condensing Units

October 2012 SS-SVX11H-EN

Installation, Operation,

and Maintenance

Models

RAUJ-C20 RAUJ-C40 RAUJ-C80

RAUJ-C25 RAUJ-C50 RAUJ-D10

RAUJ-C30 RAUJ-C60 RAUJ-D12

© 2012 Trane All rights reserved SS-SVX11H-EN

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.

ATTE NT ION : 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

WARNING

R-410A Refrigerant under Higher Pressure

than R-22!

The units described in this manual use R-410A

refrigerant which operates at higher pressures than R-22

refrigerant. Use ONLY R-410A rated service equipment

or components with these units. For specific handling

concerns with R-410A, please contact your local Trane

representative.

Failure to use R-410A rated service equipment or

components could result in equipment exploding under

R-410A high pressures which could result in death,

serious injury, or equipment damage.

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.

Introduction

SS-SVX11H-EN 3

Introduction

Overview of Manual

Note: One copy of this document ships inside the control

panel of each unit and is customer property. It must

be retained by the unit's maintenance personnel.

This booklet describes proper installation, operation, and

maintenance procedures for air cooled systems. By

carefully reviewing the information within this manual

and following the instructions, the risk of improper

operation and/or component damage will be minimized. It

is important that periodic maintenance be performed to

help assure trouble free operation. A maintenance

schedule is provided at the end of this manual. Should

equipment failure occur, contact a qualified service

organization with qualified, experienced HVAC technicians

to properly diagnose and repair this equipment.

Revision Summary

SS-SVX11H-EN

Update valve selection part numbers and wiring diagram

drawing numbers.

Trademarks

Trane, Frostat and the Trane logo are trademarks of Trane

in the United States and other countries. All trademarks

referenced in this document are the trademarks of their

respective owners.

4 SS-SVX11H-EN

Table of Contents

Model Number Descriptions . . . . . . . . . . . . . . 6

General Information . . . . . . . . . . . . . . . . . . . . . 7

Unit Inspection . . . . . . . . . . . . . . . . . . . . . . 7

Unit Dimensions & Weights . . . . . . . . . . . . . 10

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

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . 32

Neoprene Isolators (20 - 60 Ton units) . . 32

Spring Isolators (20 - 120 Ton units) . . . . 32

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Foundation . . . . . . . . . . . . . . . . . . . . . . . . 34

Unit Isolation . . . . . . . . . . . . . . . . . . . . . . 34

Leveling the Unit . . . . . . . . . . . . . . . . . . . 34

General Unit Requirements . . . . . . . . . . . 34

Refrigerant Piping Requirements . . . . . . 34

EVP Chilled Water Piping Requirements 34

Main Electrical Power Requirements . . . 35

Field Installed Control Wiring

Requirements . . . . . . . . . . . . . . . . . . . . . . 35

Low Voltage Wiring (AC & DC) . . . . . . . . 36

Refrigerant Line Components . . . . . . . . . 36

Refrigerant Piping . . . . . . . . . . . . . . . . . . 38

Typical Field-Installed Evaporator Piping:

Dual-Circuit Examples . . . . . . . . . . . . . . . 40

Typical Field-Installed EVP Chiller

Evaporator Piping . . . . . . . . . . . . . . . . . . . 41

Hot Gas Bypass for Commercial

Comfort-Cooling Applications . . . . . . . . . 41

Optional Pressure Gauges . . . . . . . . . . . . 42

Final Refrigerant Pipe Connections . . . . 43

Brazing Procedures . . . . . . . . . . . . . . . . . 43

Leak Testing Procedure . . . . . . . . . . . . . . 44

Remote EVP Chiller . . . . . . . . . . . . . . . . . 44

Field Installed Power Wiring . . . . . . . . . . 48

Disconnect Switch External Handle

(20-120 Ton Factory Mounted Option) . . 48

Main Unit Power Wiring . . . . . . . . . . . . . 49

Power Wire Sizing and Protection Device 49

Field Installed Control Wiring . . . . . . . . . 52

Controls Using 115 VAC . . . . . . . . . . . . . 52

Controls using 24 VAC . . . . . . . . . . . . . . . .53

Controls using DC Analog Input/Outputs .54

Economizer Actuator Circuit . . . . . . . . . . .54

No System Control . . . . . . . . . . . . . . . . . . .55

Variable Air Volume Control (Honeywell

W7100A) . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Discharge Air Sensor (Honeywell 6RT3 or

Honeywell 8RT3) Discharge Air Sensor . .62

Suction Line Thermostat . . . . . . . . . . . . . .62

Night Setback . . . . . . . . . . . . . . . . . . . . . . .63

EVP Chiller Control . . . . . . . . . . . . . . . . . . .63

Outside Air Thermostat

(5S57 Field Provided) . . . . . . . . . . . . . . . . .66

Constant Volume Control

(Honeywell W973) — 20 - 60TUnits Only .66

System Pre-Start Procedures . . . . . . . . . . . . .70

EVP Chiller Applications . . . . . . . . . . . . . .70

System Evacuation Procedures . . . . . . . .70

Discharge Air Controller Checkout

(Honeywell W7100A) . . . . . . . . . . . . . . . . .72

Discharge Air Sensor Checkout

(Honeywell Sensor) . . . . . . . . . . . . . . . . . .73

Economizer Actuator Checkout . . . . . . . . .73

EVP Chiller Control Checkout

(Honeywell W7100G) . . . . . . . . . . . . . . . . .74

Chilled Water Sensor Checkout

(Honeywell Sensor) . . . . . . . . . . . . . . . . . .75

Master Energy Control Checkout . . . . . . . .75

Zone Thermostat Checkout

(Honeywell T7067) . . . . . . . . . . . . . . . . . . .76

Discharge Air Sensor Checkout

(Honeywell 6RT1) . . . . . . . . . . . . . . . . . . . .77

Voltage Imbalance . . . . . . . . . . . . . . . . . . .77

Electrical Phasing . . . . . . . . . . . . . . . . . . .78

Operating Principals . . . . . . . . . . . . . . . . . . . . .79

Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Low Ambient Damper Adjustment

(Factory or Field Installed) . . . . . . . . . . . . .83

EVP Chiller Applications . . . . . . . . . . . . . .83

“Air Over” Evaporator Application . . . . . .83

System Airflow Measurement . . . . . . . . .84

Preliminary Expansion Valve Adjustment 84

SS-SVX11H-EN 5

Adding Preliminary Charge . . . . . . . . . . . 86

Compressor Start-Up (All Systems) . . . . 86

Pressure Curves . . . . . . . . . . . . . . . . . . . . 92

Final System Setup . . . . . . . . . . . . . . . . . 95

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Compressor Operational Sounds . . . . . . 97

Scroll Compressor Failure Diagnosis

and Replacement . . . . . . . . . . . . . . . . . . . 97

Fuse Replacement Data . . . . . . . . . . . . . 101

Fall Restraint - Condenser Section Roof 101

Monthly Maintenance . . . . . . . . . . . . . . 102

Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . 102

Warranty and Liability Clause . . . . . . . . . . . 104

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . 105

6 SS-SVX11H-EN

Model Number Descriptions

20 to 60-Ton Units1

DIGIT 1 — UNIT TYPE

R = Condensing Unit

DIGIT 2 — CONDENSER

A = Air Cooled

DIGIT 3 — AIRFLOW

U = Upflow

DIGIT 4 — DEVELOPMENT

SEQUENCE

J= Third

DIGITS 5,6,7 — NOMINAL

CAPACITY

C20 = 20 Tons

C25 = 25 Tons

C30 = 30 Tons

C40 = 40 Tons

C50 = 50 Tons

C60 = 60 Tons

DIGIT 8 — VOLTAGE AND START

CHARACTERISTICS

E = 200/60/3 XL

D = 415/50/3 XL

F = 230/60/3 XL

4 = 460/60/3 XL

5 = 575/60/3 XL

9 = 380/50/3 XL

DIGIT 9 — SYSTEM CONTROL

B = No System Control

C = Constant Volume Control

E = Supply Air VAV Control

P = EVP Control

DIGIT 10 — DESIGN SEQUENCE

X = Factory Assigned

DIGIT 11 — AMBIENT CONTROL

0 = Standard

1 = 0°F (Low Ambient Dampers)

DIGIT 12 — AGENCY APPROVAL

0 = None

3 = cULus (not available for 50 Hz)

DIGIT 13

A = Non Fused Unit Disconnect Switch

DIGIT 14

B = Hot Gas Bypass Valve

DIGIT 15

D = Suction Service Valves

DIGIT 16

F = Pressure Gauges and Piping

DIGIT 17

G = Return Air Sensor

DIGIT 18

J = Corrosion Protected Condenser Coil

DIGIT 19

C = Remote Chiller Evaporator & Install

Kit

T = Flow Switch (EVP Control Only)

DIGIT 20

1 = Spring Isolators

2 = Neoprene Isolators

80 to 120-Ton Units1

DIGIT 1 — UNIT TYPE

R = Remote Condensing Unit

DIGIT 2 — CONDENSER

A = Air-Cooled

DIGIT 3 — AIRFLOW

U = Upflow

DIGIT 4 — DEVELOPMENT

SEQUENCE

J = Third

DIGITS 5,6,7 — NOMINAL

CAPACITY

C80 = 80 Tons

D10 = 100 Tons

D12 = 120 Tons

DIGIT 8 — VOLTAGE AND START

CHARACTERISTICS

E = 200/60/3 XL

F = 230/60/3 XL

4 = 460/60/3 XL

5 = 575/60/3 XL

* = 380/50/3 XL2

* = 415/50/3 XL2

DIGIT 9 — SYSTEM CONTROL

B = No System Control

E = Supply Air VAV Control

P = EVP Control

DIGIT 10 — DESIGN SEQUENCE

X = Factory Assigned

DIGIT 11 — AMBIENT CONTROL

0 = Standard

1 = 0°F (Low Ambient Dampers)

DIGIT 12 — AGENCY APPROVAL

0 = None

3 = cULus (not available for 50 Hz)

DIGIT 13 — NUMBER OF

CIRCUITS

2 = Dual (All 80-120 Ton)

DIGIT 14

B = Hot Gas Bypass Valve

DIGIT 15

D = Suction Service Valves

DIGIT 16

F = Pressure Gauges and Piping

DIGIT 17

H = Corrosion Protected Condenser Coil

DIGIT 18

1 = Spring Isolators

DIGIT 19

C = Remote Chiller Evap & Install Kit

3 = Flow Switch ( EVP Control only)

1The service digit for each model number contains 21 digits; all 21 digits must be referenced.

2Contact the local Trane Sales Office for ordering information regarding 80-120 50Hz models.

SS-SVX11H-EN 7

General Information

Unit Inspection

As soon as the unit arrives at the job site

• 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, including the

roof, for signs of shipping damage.

• Check for material shortages. Refer to the Component

Layout and Ship with Location illustration.

Important: If the job site inspection of the unit reveals

damage or material shortages, file a claim

with the carrier immediately. Specify

the type and extent of the damage on

the ‘bill of lading” before signing.

• Visually inspect the internal components for shipping

damage as soon as possible after delivery and before

it is stored. Do not walk on the sheet metal base pans.

Bridging between the unit's main supports may consist of

multiple 2 by 12 boards or sheet metal grating.

• If concealed damage is discovered, notify the carrier's

terminal of damage immediately by phone and by

mail. Concealed damage must be reported within 15

days.

• Request an immediate joint inspection of the damage

by the carrier and the consignee. Do not remove

damaged material from the receiving location. Take

photos of the damage, if possible. The owner must

provide reasonable evidence that the damage did not

occur after delivery.

• Notify the appropriate Trane office before installing or

repairing a damaged unit.

Unit Nameplate

One Mylar unit nameplate is located on the outside upper

right corner of the control panel door. It includes the unit

model number, serial number, electrical characteristics,

weight, refrigerant charge, as well as other pertinent unit

data. A small metal nameplate with the Model Number,

Serial Number, and Unit Weight is located just above the

Mylar nameplate, and a third nameplate is located on the

inside of the control panel door.

When ordering replacement parts or requesting service,

be sure to refer to the specific model number, serial

number, and DL number (if applicable) stamped on the

unit nameplate.

Compressor Nameplate

The nameplate for the “Scroll” compressors is located on

the compressor lower housing.

EVP Chiller - Applications Only

If ordered with remote EVP chiller kit, piping components

ship in condenser section. The heat exchanger ships

separately. The 20-30 chiller nameplate is located on same

side as water connections near center left. The 40-120 Ton

chiller nameplate is located on same side as water

connections near bottom. To view, raise insulation flap

over nameplate. Replace and retape insulation flap after

viewing.

Phase Monitor (1U3)

The unit is equipped with a phase monitor in the control

box. The phase monitor will protect against phase loss,

imbalance and reversal of the line voltage. If a fault occurs,

the red LED will energize. While the fault condition is

present the phase monitor interrupts the 115V control

circuit. If no faults are observed, a green LED will be

energized.

Manual Motor Protectors (380V through 575V

Only): Manual motor protectors will be used as branch

circuit protection for compressors. These devices are

capable of providing both overload and short-circuit

protection.

Before operating, the manual motor protector must be

switched with the rotary on/off switch to the “ON” position

and the overload setpoint dial must be set to the

appropriate rating of the motor.

Important: In order to avoid nuisance trips, the

overload setpoint dial must be adjusted to

the following calculated value:

•Overload Setting = (Compressor RLA) x 1.12

WARNING

No Step Surface!

Do not walk on the sheet metal drain pan. Walking on

the drain pan could cause the supporting metal to

collapse, resulting in the operator/technician to fall.

Failure to follow this recommendation could result in

death or serious injury.

Figure 1. Compressor protection module

General Information

8 SS-SVX11H-EN

On 80-120 Ton units, the CSHN*** compressors come

equipped with a compressor protection device capable of

detecting phase reversal, phase loss, and phase

unbalance. The compressor protection device uses a

Green and Red LED to indicate the compressor status. A

solid Green LED denotes a fault free condition; a blinking

Red LED indicates an identifiable fault condition. Once a

problem has been detected, the power will have to be

cycled to clear the reset circuit.

Note: If the compressor has tripped, the resistance will be

4500 ohms or greater; when reset, they will be less

than 2750 ohms.

Blink Code: The blink code consists of different on / off time

of the Red LED which is repeated continuously until either

the fault is cleared or until power is cycled.

Discharge Line Thermostat

The first compressor on each circuit is equipped with a

Discharge Line Thermostat. If the temperature of the line

exceeds 230F the thermostat interrupts the 115V control

circuit for the compressors and all the compressors on the

circuit will de-energize. Once the temperature drops below

180F the thermostat will close and allow the compressor to

be energized.

Unit Description

All air cooled condensing units are designed for outdoor

installations with vertical air discharge. These units may

be installed on a flat roof or placed on a concrete slab at

ground level.

Before shipment, each unit is leak-tested, evacuated, a

nitrogen holding charge is added, and the controls are

tested for proper operation.

The condenser coils an all Aluminum Microchannel

design. Corrosion protected condenser coils are a

standard option. Louvered condenser grilles for coil

protection are standard. Direct-drive, vertical discharge

condenser fans are provided with built-in current and

overload protection.

For “Ship with” items, see Figure 2, p. 9 and Figure 3, p. 9.

If low ambient operation is required, low ambient

dampers are available as a field or factory installed option.

Units may be ordered with one of the following options:

• No System Controls (Field provided controls required)

• Constant Volume Controls

• Supply Air Temperature Control (VAV applications)

• EVP Chiller Controls

Basic unit components include:

• Manifolded Scroll Compressors

• Condenser coils

• Condenser fans (number based on unit size)

• Discharge service valve (one per circuit)

• Liquid line service valve (one per circuit)

Table 1. Blink codes

Fault LED on LED off LED on LED off

PTC(a) overheat or PTC

reset delay active

(a) PTC = Positive Temperature Coefficient

short long short long

Phase loss long long long long

Incorrect phase

sequence short short short long

Table 2. General data - 20 - 120 Ton remote chillers

Model Number

RAUJ-

C20

RAUJ-

C25

RAUJ-

C30

RAUJ-

C40

RAUJ-

C50

RAUJ-

C60

RAUJ-

C80

RAUJ-

D10

RAUJ-

D12

Shipping weight, lbs 44 84 113 90 135 157 208 292 320

Operating weight, lbs 56 104 142 131 206 244 330 473 520

No. of refrigerant circuits 1 1 1 2 2 2 2 2 2

Water volume, Gal 1.4 2.2 3.3 4.6 7.9 9.7 13.6 20.1 22.2

Chiller refrig charge @ AHRI condition, lbs 0.9 1.5 2.2 3.1 5.3 6.4 9.0 13.3 14.7

Minimum water flow rate, GPM 24 30 36 48 60 72 96 120 144

Maximum water flow rate, GPM 69 89 100 136 176 201 275 346 407

Chiller Water Supply/Return Pipe Size, in 2.0 2.0 2.0 3.0 3.0 3.0 4.0 4.0 4.0

Notes:

1. All heat exchangers are brazed plate.

2. All heat exchangers are single circuit on the water side.

3. Shipping and operating weights are approximate.

4. Refrigerant charge is approximate and for chiller only.

5. Applications with leaving water temperature below 42°F require freeze protection down to 15°F.

6. Maximum chiller operating ambient is 115°F.

General Information

SS-SVX11H-EN 9

Figure 2. Component layout and ‘ship-with’ locations 20 - 60T units(a)

(a) 60T unit shown

Condenser

Coil

Access

Panels

Lifting

Bracket

(2/side)

Condenser

Air Intake

Grills

“Shipwith”

Area

Control

Panel

Compressors

Condenser

Fans

Figure 3. Component layout and ‘ship-with’ locations 80 - 120T units(a)

(a) 120T unit shown

Condenser

Coil

Access

Panels Lifting

Bracket

(2/side)

Condenser

Air Intake

Grills

Control

Panel

Compressors

Condenser

Fans

“Shipwith”

Area

10 SS-SVX11H-EN

Unit Dimensions & Weights

Unit Clearances

Figure 4, p. 10 illustrates the minimum operating and

service clearances for either a single, multiple, or pit

application. These clearances are the minimum distances

necessary to assure adequate serviceability, cataloged

unit capacity, and peak operating efficiency.

Locate the unit as close to the applicable system support

equipment as possible to minimize refrigerant piping

lengths.

Allow adequate clearance for water and refrigerant piping

connections, space to perform service procedures, i.e.

read gauges, thermometers, and operate water system

valves.

EVP Chiller Considerations

Allow adequate clearance for water and refrigerant piping

connections, space to perform service procedures, (i.e.

read gauges, thermometers, and operate water system

valves.

Note: The braze plate chiller is intended for indoor

application. If a sub-freezing location is required,

contact Trane for installation precautions required

to prevent damage.

NOTICE:

Equipment Damage!

Providing less than the recommended clearances could

result in condenser coil starvation or recirculation of

hot condenser air.

Figure 4. Typical installation clearances for single, multiple or pit applications (20-60 Ton units only)

Unit Dimensions & Weights

SS-SVX11H-EN 11

Dimensions

Figure 5. 20-Ton air-cooled condensing unit

4" CONDUIT

MAIN POWER

1 3/4" KO LOW

VOLTAGE (30V MAX.)

37 11/16"

3 3/8"

CONTROL PANEL

35 13/16"

31 1/4"

29 1/4"

4 1/2"

2 5/8"

5 5/16"

5 3/8"

3 3/8"

1/2" X 4 KO (115V)

1/2" X 2 KO (115V)

4 3/8"

6 1/8"

88 5/16"

74 1/4"

60"

11 1/2"

18"

1 1/4" x 4 1/2"

SLOT FOR 115

VOLT CONTROL

4" LINE

VOLTAGE

ACCESS

78"

5 3/16"

1 13/16"

LOW AMBIENT

DAMPER (SEE NOTE 2)

FAN GRILLE

FAN GRILLE

CONTROL PANEL

(SEE DETAIL A)

26 13/16"

CONTROL BOX BOTTOM

(SEE DETAIL A)

13"

6 1/4"

57 5/8"

1 1/4"

8"

72 1/2"

3/4" X 4 MTG HOLES

DOOR 43 1/4" W/

180 DEG SWING

2 1

4 3

FRONT (SEE

NOTE 3 FOR

ALL MIN.

CLEARANCE)

NOTES:

1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES.

2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT .

3. FRONT OF UNIT CLEARANCE 72" . BACK OF UNIT CLEARANCE 72" .

LEFT AND RIGHT SIDE OF UNIT CLEARANCE 42".

DETAIL A

CONTROL BOX BOTTOM

Unit Dimensions & Weights

12 SS-SVX11H-EN

Figure 6. 20-Ton air-cooled condensing unit (connections)

VOLTAGE ACCESS

CONTROL PANEL

5/8" O.D.

LIQUID LINE

8 1/16"

13"

42"

SCALE1,00

0

34 1/2"

5 7/16"

5 3/4"

LIQUID LINE

SUCTION LINE

COIL

1 5/8" O.D.

SUCTION LINE

CONTROL PANEL SIDE

CONTROL

PANEL SIDE

20 TON UNIT

PLAN VIEW OF UNIT

CONNECTION DRAWING

CONNECTION DRAWING

CONTROL PANEL SIDE VIEW OF UNIT

ISOMETRIC DRAWING

ORIENTATION VIEW OF UNIT

NOTES:

1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH

INSTALLER DOCUMENTS BEFORE INSTALLATION

Unit Dimensions & Weights

SS-SVX11H-EN 13

Figure 7. 25- and 30-Ton air-cooled condensing unit

1/2" X 4 KO (115V)

1 3/4" KO LOW

VOLTAGE (30V MAX.)

1/2" X 2 KO (115V)

CONTROL PANEL

4 1/2"

3 3/8"

5 3/8"

2 5/8"

37 11/16"

35 13/16"

5 5/16"

3 3/8"

31 1/4"

29 1/4"

4" CONDUIT

MAIN POWER

1.6

CONTROL BOX BOTTOM

(SEE DETAIL A)

FAN GRILLE

LOW AMBIENT

DAMPER (SEE NOTE 2)

FAN GRILLE

4" LINE

VOLTAGE ACCESS

1 1/4" x 4 1/2"

SLOT FOR 115

VOLT CONTROL

88 1/2"

60 1/8"

74 1/4"

18"

11 1/2"

88 5/16"

78"

4 3/8"

6 1/8"

5 3/16"

1 13/16"

13"

6 1/4"

CONTROL PANEL

(SEE DETAIL A)

27 1/4"

57 5/8"

1 1/4"

8"

72 1/2"

DOOR 43 1/4" W/

180 DEG SWING

2 1

3

4

3/4" X 4 MTG HOLES

FRONT (SEE

NOTE 3 FOR

ALL MIN.

CLEARANCE)

CONTROL BOX BOTTOM

DETAIL A

NOTES:

1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES.

2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT .

3. FRONT OF 20 AND 30 UNIT CLEARANCE 72" . BACK OF UNIT CLEARANCE 72”.

LEFT AND RIGHT SIDE OF 20 AND 30 UNIT CLEARANCE 42”.

Unit Dimensions & Weights

14 SS-SVX11H-EN

Figure 8. 25- and 30-Ton air-cooled condensing unit (connections)

HOT GAS BYPASS (OPTIONAL)

LIQUID LINE

7/8" O.D. HOT GAS

BYPASS (OPTIONAL)

7/8" O.D.

LIQUID LINE

SERVICE VALVE (OPTIONAL)

COIL

COMPRESSORS

16 9/16"

5 11/16"

7 9/16"

34 1/2"

23 1/2"

A

B

A

CONTROL PANEL

VOLTAGE ACCESS

SCALE1 .00 0

CONTROL PANEL SIDE

AA

C

FRONT

AA

A

C

AA

C

FRONT

AA

A

C

AA

C

FRONT

A A

A

C

AA

C

FRONT

A A

A

C

SUCTION LINE

18 9/16"

SUCTION LINE

LIQUID LINE

COIL

25 - 30 TON UNIT

DIMENSIONAL CONNECTION DRAWING

PLAN VIEW OF UNIT

CONNECTION DRAWING

CONNECTION DRAWING

CONTROL PANEL SIDE VIEW OF UNIT

ISOMETRIC DRAWING

ORIENTATION VIEW OF UNIT

BACK VIEW OF UNIT

CONNECTION DRAWING

SUCTION LINE

Horizontal

25T: 2 1/8” O.D.

30T: 2 1/8” O.D.

Vertical

25T: 1 5/8” O.D.

30T: 2 1/8” O.D.

Unit Dimensions & Weights

SS-SVX11H-EN 15

Figure 9. 40-Ton air-cooled condensing unit

29 1/4"

31 1/4"

35 13/16"

37 11/16"

3 3/8"

3 3/8"

5 5/16"

2 5/8" 5 3/8"

1 3/4" KO LOW

VOLTAGE (30V MAX.)

1/2" X 2 KO (115V)

1/2" X 4 KO (115V)

4 1/2"

4" CONDUIT

MAIN POWER

CONTROL PANEL

88 9/16"

88 5/16"

22 1/2"

16"

4 3/8"

6 1/8"

5 3/16"

1 15/16"

88 5/16"

79 1/4"

13"

LOW AMBIENT

DAMPER (SEE NOTE 2)

FAN GRILLE

FAN GRILLE

1 1/4" x 4 1/2"

SLOT FOR 115

VOLT CONTROL

4" LINE

VOLTAGE ACCESS

CONTROL PANEL

(SEE DETAIL A)

6 1/4"

32 3/16"

BOTTOM OF CONTROL

BOX (SEE DETAIL A)

DOOR 43 1/4" W/

180 DEG SWING

2

3

6

8"

36 1/8"

36 1/8"

1 1/4"

1

4

5

3/4" X 6

MTG HOLES

85 5/8"

FRONT (SEE

NOTE 3 FOR

ALL MIN.

CLEARANCE)

DETAIL A

BOTTOM OF CONTROL BOX

NOTES:

1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES.

2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT .

3. FRONT AND BACK OF UNIT CLEARANCE 72" . LEFT AND RIGHT

SIDE OF UNIT CLEARANCE 42".

Unit Dimensions & Weights

16 SS-SVX11H-EN

Figure 10. 40-Ton air-cooled condensing unit (connections)

1 5/8" O.D.

SUCTION LINE

COMPRESSORS

COMPRESSOR

COIL

7/8" O.D. HOT GAS

BYPASS (OPTIONAL)

7/8" O.D. HOT GAS

BYPASS (OPTIONAL)

5/8" O.D.

LIQUID LINE

12"

7 11/16"

13 3/4"

4 3/4"

10 1/4"

711/16"

12"

71/4"

16 1/4"

SERVICE VALVE

(OPTIONAL)

2 7/8"

AA

C

AA

C

SCALE1,000

5 7/16"

18 1/2"

513/16"

LIQUID LINE

HOT GAS BYPASS

(OPTIONAL) SUCTION LINE

VOLTAGE

ACCESS

CONTROL

PANEL

CONTROL PANEL SIDE

CONTROL

PANEL SIDE

40 TON UNIT

DIMENSIONAL CONNECTION DRAWING

PLAN VIEW OF UNIT

CONNECTION DRAWING

CONNECTION DRAWING

CONTROL PANEL SIDE VIEW OF UNIT

ISOMETRIC DRAWING

ORIENTATION VIEW OF UNIT

BACK VIEW OF UNIT

CONNECTION DRAWING

NOTES:

1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH

INSTALLER DOCUMENTS BEFORE INSTALLATION

Unit Dimensions & Weights

SS-SVX11H-EN 17

Figure 11. 50-Ton air-cooled condensing unit

29 1/4"

31 1/4"

35 13/16"

37 11/16"

3 3/8"

3 3/8"

5 5/16"

2 5/8"

5 3/8"

1 3/4" KO LOW

VOLTAGE (30V MAX.)

1/2" X 2 KO (115V)

1/2" X 4 KO (115V)

4 1/2"

4" CONDUIT

MAIN POWER

CONTROL PANEL

88 5/16"

113 13/16"

103 1/2"

16"

22 1/2"

79 1/4"

1 15/16"

FAN GRILLE

LOW AMBIENT

DAMPER (SEE NOTE 2)

FAN GRILLE

1 1/4" x 4 1/2"

SLOT FOR 115

VOLT CONTROL

4" LINE

VOLTAGE

ACCESS

BOTTOM OF CONTROL

BOX (SEE DETAIL A)

13"

6 1/4"

32 1/4"

CONTROL PANEL

(SEE DETAIL A)

DOOR 43 1/4" W/

180 DEG SWING

8 1/8"

48 7/8"

48 7/8"

85 5/8"

3/4" X 6

MTG HOLES

12

34

56

FRONT (SEE

NOTE 3 FOR

ALL MIN.

CLEARANCE)

DETAIL A

BOTTOM OF CONTROL BOX

NOTES:

1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES.

2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT .

3. FRONT AND BACK OF UNIT CLEARANCE 72" . LEFT AND RIGHT

SIDE OF UNIT CLEARANCE 42".

Unit Dimensions & Weights

18 SS-SVX11H-EN

Figure 12. 50-Ton air-cooled condensing unit (connections)

COMPRESSORS

COIL

COMPRESSOR

COIL

15/8" O.D. SUCTION LINE

for vertical

2 1/8” O.D. SUCTION LINE

for horizontal

SUCTION LINE

LIQUID LINE

7/8" O.D. HOT GAS

BYPASS (OPTIONAL)

HOT GAS BYPASS

(OPTIONAL)

7/8" O.D, HOT GAS

BYPASS (OPTIONAL)

12"

10 13/16"

41 3/4"

32 3/4"

7 11/16"

7/8" O.D. LIQUID LINE

SERVICE VALVE (OPTIONAL)

12"

7 11/16"

10 13/16"

29 3/4"

38 3/4"

CONTROL

PANEL

VOLTAGE

ACCESS

CONTROL PANEL SIDE

CONTROL

PANEL SIDE

AA

A

AA

A

5 7/16"

5 13/16

18 1/2"

DIMENSIONAL CONNECTION DRAWING

50 TON UNIT

PLAN VIEW OF UNIT

CONNECTION DRAWING

CONNECTION DRAWING

CONTROL PANEL SIDE VIEW OF UNIT

ISOMETRIC DRAWING

ORIENTATION VIEW OF UNIT

BACK VIEW OF UNIT

CONNECTION DRAWING

NOTES:

1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH

INSTALLER DOCUMENTS BEFORE INSTALLATION

Unit Dimensions & Weights

SS-SVX11H-EN 19

Figure 13. 60-Ton air-cooled condensing unit

29 1/4"

31 1/4"

35 13/16"

37 11/16"

3 3/8"

3 3/8"

5 5/16"

2 5/8"

5 3/8"

1 3/4" KO LOW

VOLTAGE (30V MAX.)

1/2" X 2 KO (115V)

1/2" X 4 KO (115V)

4 1/2"

4" CONDUIT

MAIN POWER

CONTROL PANEL

FAN GRILLE

4" LINE

VOLTAGE

ACCESS

1 1/4" x 4 1/2"

SLOT FOR 115

VOLT CONTROL

FAN GRILLE

CONTROL PANEL

(SEE DETAIL A)

1 15/16"

103 1/2"

5 3/16"

113 13/16"

22 1/2"

16"

79 1/4"

114"

88 5/16"

13"

LOW AMBIENT

DAMPER (SEE NOTE 2)

32 3/16"

BOTTOM OF CONTROL

BOX (SEE DETAIL A)

6 1/4"

3/4" X 6

MTG HOLES

DOOR 43 1/4" W/

180 DEG SWING

8 1/8"

48 7/8"

48 7/8"

85 5/8"

2 1

3

4

65

FRONT (SEE

NOTE 3 FOR

ALL MIN.

CLEARANCE)

NOTES:

1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES.

2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT .

BOTTOM OF CONTROL BOX

DETAIL A

3. FRONT AND BACK OF UNIT CLEARANCE 72" . LEFT AND RIGHT

SIDE OF UNIT CLEARANCE 42".

Unit Dimensions & Weights

20 SS-SVX11H-EN

Figure 14. 60-Ton air-cooled condensing unit (connections)

COMPRESSORS

COIL

COMPRESSOR

COIL

2 1/8" O.D. SUCTION LINE

SUCTION LINE

LIQUID LINE

7/8" O.D. HOT GAS

BYPASS (OPTIONAL)

HOT GAS BYPASS

(OPTIONAL)

7/8" O.D, HOT GAS

BYPASS (OPTIONAL)

12"

10 13/16"

41 3/4"

32 3/4"

711/16"

7/8" O.D. LIQUID LINE

SERVICE VALVE (OPTIONAL)

12"

7 11/16"

10 13/16"

29 3/4"

38 3/4"

CONTROL

PANEL

VOLTAGE

ACCESS

CONTROL PANEL SIDE

CONTROL

PANEL SIDE

AA

A

AA

A

5 7/16"

5 13/16"

18 1/2"

60 TON UNIT

DIMENSIONAL CONNECTION DRAWING

NOTES:

1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH

INSTALLER DOCUMENTS BEFORE INSTALLATION

PLAN VIEW OF UNIT

CONNECTION DRAWING

CONNECTION DRAWING

CONTROL PANEL SIDE VIEW OF UNIT

ISOMETRIC DRAWING

ORIENTATION VIEW OF UNIT

BACK VIEW OF UNIT

CONNECTION DRAWING

Unit Dimensions & Weights

SS-SVX11H-EN 21

Figure 15. 80-Ton air-cooled condensing unit

29 1/4"

31 1/4"

35 13/16"

37 11/16"

3 3/8"

3 3/8"

5 5/16"

2 5/8" 5 3/8"

1 3/4" KO LOW

VOLTAGE (30V MAX.)

1/2" X 2 KO (115V)

1/2" X 4 KO (115V)

4 1/2"

4" CONDUIT

MAIN POWER

CONTROL PANEL

1.6

1 13/16"

176 7/16"

83 1/8"

30 1/4" 30 1/8"

83 1/4"

88 5/16"

176 11/16"

FAN GRILLE

1 1/4" x 4 1/2"

SLOT FOR 115

VOLT CONTROL

4" LINE

VOLTAGE

ACCESS

FAN GRILLE

79 1/4"

7"

9"

14"

LOW AMBIENT

DAMPER (SEE NOTE 2)

6 1/4"

1

16 5/16"

BOTTOM OF CONTROL

BOX (SEE DETAIL A)

CONTROL PANEL

(SEE DETAIL A)

2 1/4" x 1 1/4" 24 VOLTAGE

CONTROL WIRING

3/4" X 8

MTG HOLES

DOOR 43 1/4" W/

180 DEG SWING

1 1/4"

8"

72 1/8"

16"

72 1/8"

85 5/8"

12

4 3

65

87

FRONT (SEE

NOTE 3 FOR

ALL MIN.

CLEARANCE)

DIMENSIONAL DETAIL

DETAIL A

NOTES:

1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES.

2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT .

3. FRONT AND BACK OF UNIT CLEARANCE 96" . LEFT AND RIGHT

SIDE OF UNIT CLEARANCE 48".

Unit Dimensions & Weights

22 SS-SVX11H-EN

Figure 16. 80-Ton air-cooled condensing unit (connections)

1 1/8" O.D.

LIQUID LINE

2 1/8" O.D .SUCTION LINE

COIL

21/8"O.D.SUCTIONLINE

1 3/8" O.D. HOT GAS

BYPASS (OPTIONAL)

COMPRESSOR (6)

13/8"HOTGAS

BYPASS (OPTIONAL)

COMPRESSOR (6)

HOT GAS BYPASS

(OPTIONAL)

14 13/16"

25 1/8"

46 3/16"

SERVICE VALUE

(OPTIONAL SEE DETAIL A) 42 9/16"

25 1/8"

14 1/16" 19 1/16"

73 3/8"

45 9/16"

CONTROL

PANEL SIDE

18 5/16"

SUCTION LINE

LIQUID LINE

DETAIL A

VOLTAGE

ACCESS

CONTROL

PANEL

CONTROL

PANEL SIDE

5 9/16"

93/8"

LIQUID LINE

COIL

COMPRESSOR (6)

SERVICE VALUE

(OPTIONAL SEE DETAIL A)

DETAIL A

DETAIL DRAWING

NOTES:

1

. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH

INSTALLER DOCUMENTS BEFORE INSTALLATION

PLAN VIEW OF UNIT

CONNECTION DRAWING

CONNECTION DRAWING

CONTROL PANEL SIDE VIEW OF UNIT

LEFT VIEW OF UNIT

CONNECTION DRAWING

ISOMETRIC DRAWING

ORIENTATION VIEW OF UNIT

Unit Dimensions & Weights

SS-SVX11H-EN 23

Figure 17. 100- and 120-Ton air-cooled condensing unit

29 1/4"

31 1/4"

35 13/16"

37 11/16"

3 3/8"

3 3/8"

5 5/16"

2 5/8" 5 3/8"

1 3/4" KO LOW

VOLTAGE (30V MAX.)

1/2" X 2 KO (115V)

1/2" X 4 KO (115V)

4 1/2"

4" CONDUIT

MAIN POWER

CONTROL PANEL

1 15/16"

108 11/16"

20 1/16"

5 3/16"

108 5/8"

5 1/8"

20 1/16"

79 1/4"

7"

14"

9"

88 5/16"

FAN GRILLE

CONTROL PANEL

(SEE DETAIL A)

4" LINE

VOLTAGE ACCESS

1 1/4" x 4 1/2"

SLOT FOR 115

VOLT CONTROL

FAN GRILLE

LOW AMBIENT

DAMPER (SEE NOTE 2)

BOTTOM OF CONTROL

BOX (SEE DETAIL A)

16 3/16"

2 1/4" x 1 1/4" 24 VOLTAGE

CONTROL WIRING

6 1/4"

13"

3/4" X 8

MTG HOLES

DOOR 43 1/4" W/

180 DEG SWING

8"

1 1/4"

97 5/8"

16"

97 5/8"

85 13/16"

FRONT (SEE

NOTE 3 FOR

ALL MIN.

CLEARANCE)

DIMENSIONAL DETAIL

DETAIL A

NOTES:

1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES.

2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT .

3. FRONT AND BACK OF UNIT CLEARANCE 96" . LEFT AND RIGHT

SIDE OF UNIT CLEARANCE 48".

227 1/4”

Unit Dimensions & Weights

24 SS-SVX11H-EN

Figure 18. 100- and 120-Ton air-cooled condensing unit (connections)

1 3/8"HOT GAS

BYPASS (OPTIONAL)

1 1/8" O.D.

LIQUID LINE

COMPRESSOR (6)

SUCTION LINE

COIL

COMPRESSOR (6)

LIQUID LINE

SUCTION LINE

HOT GAS BYPASS

(OPTIONAL)

1 3/8"HOT GAS

BYPASS (OPTIONAL)

25 1/8"

39 5/8"

67 7/16"45 7/8"

18 1/16" 13 1/16"

/8" O.D.

QUID LINE

2 5/8" O.D. SUCTION LINE

46 1/4"

74"

25 1/8"

SCALE1,000

18 5/16"

59/16"

93/8"

VOLTAGE

ACCESS

CONTROL

PANEL

CONTROL

PANEL SIDE

CONTROL

PANEL SIDE

SERVICE VALUE (OPTIONAL SEE DETAIL A)

SERVICE VALUE

(OPTIONAL SEE DETAIL A)

DETAIL A

DETAIL DRAWING

NOTES:

1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH

INSTALLER DOCUMENTS BEFORE INSTALLATION

PLAN VIEW OF UNIT

CONNECTION DRAWING

CONNECTION DRAWING

CONTROL PANEL SIDE VIEW OF UNIT LEFT VIEW OF UNIT

CONNECTION DRAWING

ISOMETRIC DRAWING

ORIENTATION VIEW OF UNIT

2 5/8” O.D. for horizontal

2 1/8” O.D. for vertical

SUCTION LINE

2 5/8” O.D. for horizontal

2 1/8” O.D. for vertical

Unit Dimensions & Weights

SS-SVX11H-EN 25

Figure 19. 20-Ton evaporator chiller

Notes:Notes:

THIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLYTHIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLY

HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS (ITEM 4)HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS (ITEM 4)

INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS & REFRIGERANT INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS & REFRIGERANT

TUBING, OR MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING REFRIGERANT LINESTUBING, OR MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING REFRIGERANT LINES

INSTALL INSULATION SIDE PIECES FIRST (ITEMS 6 & 7), THEN WRAPPER (ITEM 5), ITEM 5 MAY INSTALL INSULATION SIDE PIECES FIRST (ITEMS 6 & 7), THEN WRAPPER (ITEM 5), ITEM 5 MAY

REQUIRE TRIMMING REQUIRE TRIMMING

USE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATIONUSE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATION

WATER CONNECTIONS ARE GROOVED (VICTAULIC)WATER CONNECTIONS ARE GROOVED (VICTAULIC)

REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.

SEE IOM BRAZE PROCEDURES.SEE IOM BRAZE PROCEDURES.

REQUIRES FIELD

PROVIDED

1/2”X14NPTE

STAINLESS STEEL

OR PVC PLUG

Unit Dimensions & Weights

26 SS-SVX11H-EN

Figure 20. 25 and 30-Ton evaporator chiller

Notes:

THIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLY

HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS (ITEM 4)

INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS & REFRIGERANT TUBING, OR

MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING REFRIGERANT LINES

Install INSULATION SIDE PIECES FIRST (ITEMS 6 & 7), THEN WRAPPER (ITEM 5), ITEM 5 MAY REQUIRE

TRIMMING

USE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATION

WATER CONNECTIONS ARE GROOVED (VICTAULIC)

REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.

SEE IOM BRAZE PROCEDURE.

REQUIRES FIELD

PROVIDED

1/2”X14NPTE

STAINLESS STEEL

OR PVC PLUG

Unit Dimensions & Weights

SS-SVX11H-EN 27

Figure 21. 40-Ton evaporator chiller

Notes:Notes:

THIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLYTHIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLY

HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS (ITEM 4)HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS (ITEM 4)

INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS & REFRIGERANT INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS & REFRIGERANT

TUBING, OR MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING REFRIGERANT LINESTUBING, OR MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING REFRIGERANT LINES

Install INSULATION SIDE PIECES FIRST (ITEMS 6 & 7), THEN WRAPPER (ITEM 5), ITEM 5 MAY Install INSULATION SIDE PIECES FIRST (ITEMS 6 & 7), THEN WRAPPER (ITEM 5), ITEM 5 MAY

REQUIRE TRIMMING REQUIRE TRIMMING

USE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATIONUSE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATION

WATER CONNECTIONS ARE GROOVED (VICTAULIC)WATER CONNECTIONS ARE GROOVED (VICTAULIC)

REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.

SEE IOM BRAZE PROCEDURE.SEE IOM BRAZE PROCEDURE.

REQUIRES FIELD

PROVIDED

1/2”X14NPTE

STAINLESS STEEL

OR PVC PLUG

Unit Dimensions & Weights

28 SS-SVX11H-EN

Figure 22. 50 and 60-Ton evaporator chiller

Notes:Notes:

THIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLYTHIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLY

HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS (ITEM 4). HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS (ITEM 4).

ATTACH MOUNTING LEGS BEFORE PIPING AND INSULATINGATTACH MOUNTING LEGS BEFORE PIPING AND INSULATING

INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS & REFRIGERANT INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS & REFRIGERANT

TUBING, OR MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING REFRIGERANT LINESTUBING, OR MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING REFRIGERANT LINES

INSTALL FACE INSULATION FIRST (ITEMS 6 & 7), THEN WRAPPER INSULATION (ITEM 5), ITEM 5 MAY INSTALL FACE INSULATION FIRST (ITEMS 6 & 7), THEN WRAPPER INSULATION (ITEM 5), ITEM 5 MAY

REQUIRE TRIMMING REQUIRE TRIMMING

USE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATIONUSE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATION

WATER CONNECTIONS ARE GROOVED (VICTAULIC)WATER CONNECTIONS ARE GROOVED (VICTAULIC)

REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.

SEE IOM BRAZE PROCEDURES.SEE IOM BRAZE PROCEDURES.

REQUIRES FIELD

PROVIDED

1/2”X14NPTE

STAINLESS STEEL

OR PVC PLUG

Unit Dimensions & Weights

SS-SVX11H-EN 29

Figure 23. 80 and 120-Ton evaporator chiller

Notes:Notes:

THIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLYTHIS HEAT EXCHANGER IS INTENDED FOR INDOOR INSTALLATION ONLY

HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS HEAT EXCHANGER MOUNTING LEGS ARE INSTALLED AT JOB SITE WITH SUPPLIED FASTENERS

(ITEM 4)(ITEM 4)

INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS & INSULATION (ITEMS 5, 6, & 7) SHOULD BE INSTALLED AFTER INSTALLING LEGS &

REFRIGERANT TUBING, OR MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING REFRIGERANT TUBING, OR MUST BE ADEQUATELY SHIELDED AGAINST HEAT WHEN BRAZING

REFRIGERANT LINESREFRIGERANT LINES

Install INSULATION SIDE PIECES FIRST (ITEMS 6 & 7), THEN WRAPPER (ITEM 5), ITEM 5 MAY Install INSULATION SIDE PIECES FIRST (ITEMS 6 & 7), THEN WRAPPER (ITEM 5), ITEM 5 MAY

REQUIRE TRIMMING REQUIRE TRIMMING

USE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATIONUSE VINYL TAPE (FIELD SUPPLIED) TO SEAL INSULATION AFTER INSTALLATION

WATER CONNECTIONS ARE GROOVED (VICTAULIC)WATER CONNECTIONS ARE GROOVED (VICTAULIC)

REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.REFRIGERANT CONNECTIONS ARE STAINLESS STEEL AND REQUIRE SPECIAL BRAZE MATERIALS.

SEE IOM BRAZE PROCEDURES.SEE IOM BRAZE PROCEDURES.

REQUIRES FIELD

PROVIDED

1/2”X14NPTE

STAINLESS STEEL

OR PVC PLUG

Unit Dimensions & Weights

30 SS-SVX11H-EN

Table 3. Typical unit weights and point loading data 20 - 120 Ton units

Weight CG Locations Weight on isolator mounting location (lbs.)

Tons Model Shipping Operating X Y Loc. 1 Loc. 2 Loc 3. Loc 4. Loc. 5 Loc. 6 Loc. 7 Loc. 8

20 RAUJC20 1548 1573 40.8 33.0 475.5 383.3 403.2 311.0 --- --- --- ---

25 RAUJC25 1598 1623 40.6 32.8 491.2 399.3 412.2 320.3 --- --- --- ---

30 RAUJC30 1598 1623 40.6 32.8 491.2 399.3 412.2 320.3 --- --- --- ---

40 RAUJC40 2482 2532 43.4 46.0 452.3 415.7 440.3 403.7 428.3 391.8 --- ---

50 RAUJC50 2826 2868 52.3 45.9 365.5 331.0 427.8 393.3 700.1 650.3 --- ---

60 RAUJC60 2803 2853 52.1 45.9 367.2 332.8 426.0 391.6 692.5 642.9 --- ---

80 RAUJC80 4870 4940 86.0 55.8 798.3 462.1 786.7 450.5 785.1 448.9 772.4 436.1

100 RAUJC100 5539 5622 110.9 55.0 871.1 609.5 881.0 616.2 882.6 432.1 892.5 436.8

120 RAUJC120 5995 6121 111.5 54.2 988.2 614.7 948.3 587.4 941.8 583.0 901.8 555.8

Figure 24. Air-cooled condensing units

Table 4. Isolator mounting locations

Mounting Location

Unit Size 12345678

20/25/30 X8”8”6' 8 1/8”6' 8 1/8”----

Y4' 10 3/4”1 1/4”4' 10 3/4”1 1/4”----

40 X 8” 8” 3' 8 1/8” 3' 8 1/8” 6' 8 1/4” 6' 8 1/4” - -

Y 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4” - -

50/60 X 8” 8” 4' 8 7/8” 4' 8 7/8” 8' 9 3/4” 8' 9 3/4” - -

Y 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4” - -

80 X 8” 8” 6' 8 1/8” 6' 8 1/8” 9' 1/8” 9' 1/8” 14' 1/4” 14' 1/4"

Y 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4"

100/120 X 8” 8” 8' 9 5/8” 8' 9 5/8” 10' 1 5/8” 10' 1 5/8” 18' 3 1/4 18' 3 1/4”

Y 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4” 7' 3 1/8” 1 1/4"

Table 5. General data - 20 - 120 Ton remote chillers

Model Number

RAUJ-

C20

RAUJ-

C25

RAUJ-

C30

RAUJ-

C40

RAUJ-

C50

RAUJ-

C60

RAUJ-

C80

RAUJ-

D10

RAUJ-

D12

Shipping weight, lbs 44 84 113 90 135 157 208 292 320

Operating weight, lbs 56 104 142 131 206 244 330 473 520

No. of refrigerant circuits 1 1 1 2 2 2 2 2 2

Water volume, Gal 1.4 2.2 3.3 4.6 7.9 9.7 13.6 20.1 22.2

Chiller refrig charge @ ARI condition, lbs 0.9 1.5 2.2 3.1 5.3 6.4 9.0 13.3 14.7

Minimum water flow rate, GPM 24 30 36 48 60 72 96 120 144

Maximum water flow rate, GPM 69 89 100 136 176 201 275 346 407

Chiller Water Supply/Return Pipe Size, in 2.0 2.0 2.0 3.0 3.0 3.0 4.0 4.0 4.0

Notes:

1. All heat exchangers are brazed plate.

2. All heat exchangers are single circuit on the water side.

3. Shipping and operating weights are approximate.

4. Refrigerant charge is approximate and for chiller only.

5. Applications with leaving water temperature below 42°F require freeze protection down to 15°F.

6. Maximum chiller operating ambient is 115°F.

Control

Panel

80-120 Ton

1

2

3

4

5

6

7

8

Y

X

Control

Panel

Control

Panel

20-30 Ton 40-60 Ton

11

22

33

44

5

6

YY

XX

Unit Dimensions & Weights

SS-SVX11H-EN 31

Use spreader bars as shown in Figure 25. See installation

manual or nameplate for unit weight. See installation

instructions located inside the central panel for further

rigging information.

A Rigging illustration and Center-of-Gravity dimensional

data table is shown in Figure 25. Refer to the typical unit

operating weights table before proceeding.

1. Rig the condensing unit as shown in Figure 25. 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.

2. Install spreader bars, as shown in Figure 25, 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.

3. Test-lift the unit to ensure it is properly rigged and

balanced, make any necessary rigging adjustments.

4. Lift the unit and position it into place.

WARNING

Heavy Objects!

Ensure that all the lifting equipment used is properly

rated for the weight of the unit being lifted. Each of the

cables (chains or slings), hooks, and shackles 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 could cause

equipment or property damage. Failure to follow

instructions above or properly lift unit could result in

unit dropping and possibly crushing operator/

technician which could result in death or serious injury.

NOTICE:

Heat Exchanger or Compressor Damage!

Do not operate system below minimum specified water

flow rate or below 42°F leaving water temperature

without glycol. If water freezes inside the brazed plate

heat exchanger, separation between refrigerant and

water could be damaged and the heat exchanger must

be replaced. Compressor damage could also occur

requiring replacement and system cleanup.

Figure 25. Rigging and center-of-gravity data 20 - 60

Ton units (L) and rigging and center-of-

gravity data 80 - 120 Ton units (R)

Y

Y

Unit Dimensions & Weights

32 SS-SVX11H-EN

Unit Isolation

To minimize unit sound and vibration transmission, one of

the following installation methods should be used:

1. Install the unit directly on an isolated (detached)

concrete pad or on isolated concrete footings located

at each unit load point.

2. Install the optional neoprene or spring isolators at each

. Refer to the “Neoprene isolators” or “Spring isolator”

section below.

Neoprene Isolators (20 - 60 Ton units)

Install the neoprene isolators at each unit mounting (load)

point, using the following procedure:

1. Elevate the unit (one side at a time) to allow access to

the base rail mounting holes.

2. Align the mounting holes in the base rail of the unit

with the holes in the top of the appropriate isolator. See

Ta b l e 6, p. 33 and/or Ta b l e 7, p . 33 for the appropriate

isolator for each load point.

3. Install a 1/2" NC bolt (field supplied) through the base

rail of the unit into the threaded bolt hole of the

isolator. Position the isolator to allow access to the

mounting holes in the base of the isolator, then tighten

securely.

4. Lower the unit and isolator onto the mounting surface.

The maximum isolator deflection should be

approximately 1/4 inch.

5. Secure the isolator to the mounting surface using the

base holes in the isolator.

6. Level the unit carefully. Refer to the “Leveling the Unit”

section.

7. After the unit is level, tighten the isolator base

mounting bolts to secure them to the mounting

surface.

Spring Isolators (20 - 120 Ton units)

Install the spring isolators at each unit mounting (load)

point, using the following procedure:

1. Elevate the unit (one side at a time) to allow access to

the base rail mounting holes.

2. Align the mounting holes in the base rail of the unit

with the positioning pin in the top of the appropriate

isolator. Refer to Figure 26, p. 33 for the appropriate

isolator for each load point.

3. Position the isolator to allow access to the mounting

holes in the base of the isolator.

4. Lower the unit onto the isolator. The positioning pin on

the isolator must engage into the hole of the base rail.

The clearance between the upper and lower isolator

housings should be approximately 1/4 to 1/2 inch.

Refer to Figure 26, p. 33 A clearance greater than 1/2

inch indicates that shims are required to level the unit.

Refer to the “Leveling the Unit” section.

5. Make minor clearance adjustments by turning the

isolator leveling bolt (Figure 26, p. 33) clockwise to

increase the clearance and counterclockwise to

decrease the clearance. If proper isolator clearance

cannot be obtained by turning the leveling bolt, level

the isolators themselves. A 1/4 inch variance in

elevation is acceptable.

6. Secure the isolator to the mounting surface using the

base holes in the isolator.

7. After unit is level, tighten isolator base mounting bolts

to secure them to the mounting surface.

WARNING

Heavy Objects!

Use solid type blocks, i.e. 4" X 4" wood blocks or

similar material to prevent collapsing. Keep hands and

other body limbs clear of elevated base rail while

installing isolators. Failure to do so could result in

death or serious injury.

WARNING

Heavy Objects!

Use solid type blocks, i.e. 4" X 4" wood blocks or

similar material to prevent collapsing. Keep hands and

other body limbs clear of elevated base rail while

installing isolators. Failure to do so could result in

death or serious injury.

Unit Dimensions & Weights

SS-SVX11H-EN 33

Table 6. Typical neoprene isolator selection & location

Shipping

Weight

Operating

Weight

Isolator Part No. On Mounting Location

Tons Model Loc. 1 Loc. 2 Loc 3. Loc 4. Loc. 5 Loc. 6

20 RAUJC20 1548 1573 R-3-RED R-3-RED R-3-RED R-3-RED --- ---

25 RAUJC25 1598 1623 R-3-RED R-3-RED R-3-RED R-3-RED --- ---

30 RAUJC30 1598 1623 R-3-RED R-3-RED R-3-RED R-3-RED --- ---

40 RAUJC40 2482 2532 R-3-RED R-3-RED R-3-RED R-3-RED R-3-RED R-3-RED

50 RAUJC50 2826 2868 R-3-RED R-3-RED R-3-RED R-3-RED R-3-GREEN R-3-GREEN

60 RAUJC60 2803 2853 R-3-RED R-3-RED R-3-RED R-3-RED R-3-GREEN R-3-GREEN

Table 7. Typical spring isolator selection and location 20-120 Ton units

Mdl

RA Weights

CG

Locations Isolator Part No. On Mounting Location

Tons Ship Oper X Y Loc. 1 Loc. 2 Loc 3. Loc 4. Loc. 5 Loc. 6 Loc. 7 Loc. 8

20 1548 1573 40.8 33.0 CP-1D-510 CP-1D-510 CP-1D-510 CP-1D-340 --- --- --- ---

25 1598 1623 40.6 32.8 CP-1D-510 CP-1D-510 CP-1D-510 CP-1D-340 --- --- --- ---

30 1598 1623 40.6 32.8 CP-1D-510 CP-1D-510 CP-1D-510 CP-1D-340 --- --- --- ---

40 2482 2532 43.4 46.0 CP-1D-510 CP-1D-510 CP-1D-510 CP-1D-510 CP-1D-510 CP-1D-510 --- ---

50 2826 2868 52.3 45.9 CP-1D-510 CP-1D-340 CP-1D-510 CP-1D-510 CP-1D-900 CP-1D-675 --- ---

60 2803 2853 52.1 45.9 CP-1D-510 CP-1D-340 CP-1D-510 CP-1D-510 CP-1D-900 CP-1D-675 --- ---

80 4870 4940 86.0 55.8 CP-1D-900 CP-1D-510 CP-1D-900 CP-1D-510 CP-1D-900 CP-1D-510 CP-1D-900 CP-1D-510

100 5539 5622 110.9 55.0 CP-1D-900 CP-1D-675 CP-1D-900 CP-1D-675 CP-1D-900 CP-1D-510 CP-1D-900 CP-1D-510

120 5995 6121 111.5 54.2 C2P-1D-1020 CP-1D-675 C2P-1D-1020 CP-1D-675 C2P-1D-1020 CP-1D-675 C2P-1D-1020 CP-1D-675

Figure 26. Spring isolators 20-120 Ton data

34 SS-SVX11H-EN

Installation

Foundation

If the unit is installed at ground level, elevate it above the

snow line. Provide concrete footings at each support

location or a slab foundation for support. See Table 3, p. 30

for the unit operating and point loading weights when

constructing the footing foundation.

Anchor the unit to the footings or slab using hold down

bolts or isolators. Isolators should be installed to minimize

the transmission of vibrations into the building. See

section “Unit Isolation,” p. 32 for spring or rubber isolator

installation instructions.

For rooftop applications, ensure the roof is strong enough

to support the unit. See Table 3, p. 30 for the unit operating

weights.

Anchor the unit to the roof with hold-down bolts or

isolators. Follow the instructions in section “Unit

Isolation,” p. 32 “for proper isolator placement and

installation.

Check with a roofing contractor for proper waterproofing

procedures.

Unit Isolation

To minimize unit sound and vibration transmission, one of

the following installation methods should be used:

1. Install the unit directly on an isolated (detached)

concrete pad or on isolated concrete footings located

at each unit load point.

2. Install the optional neoprene or spring isolators at each

mounting location. See “Neoprene Isolators (20 - 60

Ton units),” p. 32 or “Spring Isolators (20 - 120 Ton

units),” p. 32.

Leveling the Unit

Before tightening the mounting bolts, level the unit

carefully. Use the unit base rail as a reference. Level the

unit to within 1/4 inch over its entire length. Use shims if

non-adjustable isolators (neoprene) are used.

If adjustable isolators (spring) are used, ensure that the

proper isolator housing clearance is maintained while

leveling the unit. Isolators are identified by color and/or an

isolator part number. Shims under the isolators may be

required if the unit cannot be leveled using the isolator

leveling bolt.

General Unit Requirements

The checklist listed below is a summary of the steps

required to successfully install a commercial air cooled

condenser. This checklist is intended to acquaint the

installing personnel with what is required in the

installation process. It does not replace the detailed

instruction called out in the applicable sections of this

manual.

• Verify that the power supply complies with the unit

nameplate specifications.

• Check the unit for shipping damage and material

shortage; file a freight claim and notify Trane office.

• Verify that the installation location of the unit will

provide the required clearance for proper operation.

• Install appropriate isolators, if required.

Refrigerant Piping Requirements

• Install properly sized liquid line(s) between the liquid

line connections on the unit and the evaporator. See

section “Refrigerant Piping,” p. 38 for recommended

line components and guidelines.

• Install a properly sized liquid line isolation solenoid

valve in each liquid line.

• Install refrigerant rated shutoff valves in the liquid

line(s) to isolate the filter drier(s) for service.

• Install a properly sized filter drier in each liquid line.

• Install a properly sized filter in each suction line.

• Install properly sized suction line(s) between the

suction line connections on the unit and the

evaporator. See “Refrigerant Piping,” p. 38 for

recommended line components and guidelines.

• Install properly sized hot gas bypass line(s) between

the hot gas bypass connections on the unit and the

evaporator.

• Insulate the suction line.

• Leak test the system. See “Leak Testing Procedure,”

p. 44 for recommended procedures.

EVP Chilled Water Piping Requirements

• Install properly sized chilled water pipe between the

EVP chiller and the supporting equipment. See

“Chilled Water Piping,” p. 45 for recommended system

components and guidelines.

• Install supply and return water side pressure gauges

(with isolation valves.)

• Install thermometers in water supply and return

piping.

• Install isolation (shutoff) valves in water supply and

return piping.

• Install a properly sized strainer in the supply piping.

• Install blowdown (recommended) valve or plug in

strainer cleanout.

• Install a balancing valve in the return piping.

• Install a water flow switch in the return piping.

• Install chilled solution sensor well and sensor in the

water outlet piping.

• Install freezestat well and freezestat bulb in the water outlet piping.

Installation

SS-SVX11H-EN 35

• Install chiller piping drain with shutoff valve.

• Install 1/2” x 14 NPT stainless steel or PVC plug in braze

plate chiller body.

• Flush the chilled solution piping system, if applicable.

• Connect the chilled solution piping to the chiller.

Note: The braze plate chiller is intended for indoor

application. If a subfreezing location is required,

contact Trane for installation precautions required

to prevent damage.

Note: If using an acidic, commercial flushing solution, to

prevent damage to the internal evaporator

components, flush all chilled solution piping before

making the final connection to the EVP chiller.

Main Electrical Power Requirements

• Verify the power supply meets the required power

requirements of the system.

• Install power wiring in accordance with all applicable

codes.

• Install and connect properly sized power supply

wiring, with over current protection, to the main power

terminal block (1TB1) or to an optional factory

mounted non-fused disconnect switch (1S1) in the

control panel.

• Install and connect properly sized power supply

wiring, with over current protection, to the proper

termination point in the air handling unit (If

applicable).

• Install proper grounding wires to an earth ground.

• Install and connect properly sized power supply

wiring, with overcurrent protection, to the proper

termination point for the chilled solution pump (EVP

units only).

Field Installed Control Wiring

Requirements

115 Volt Control Wiring (All Units)

• Verify that the Control transformer (1T1) is wired for

the proper operating voltage.

• Connect properly sized wiring to the liquid line

solenoid valve(s).

• The phase monitor (1U3) when powered with line

voltage properly phased and balanced has a green LED

energized.

• Connect properly sized wiring to the hot gas bypass

solenoid valve(s), if applicable, to operate with the

unit. Refer to the unit wiring diagram that shipped with

the unit.

• Install the interlock circuitry wiring for the air handling

unit to permit compressor operation after the fan has

started, i.e., proof of fan operation device, fan starter

auxiliary contacts or pump starter station, pump

starter auxiliary contacts, proof of flow device, etc.

Refer to the field connection diagram that shipped with

the unit for interlocking information.

• Install properly sized power supply wiring, with over

current protection, to the proper termination point for

the field provided economizer actuator(s), if

applicable. Refer to the “Economizer Actuator Circuit”

illustrated in the “Field Installed Control Wiring”

section.

”No Controls” Units

• A field provided “step” controller must be installed

and properly wired. (Controller will have 2, 4 or 6 steps,

depending on unit configuration.) Refer to the field

connection diagram for connection information.

• Install proper grounding wires to an earth ground.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

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 cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

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.

Installation

36 SS-SVX11H-EN

• Install an outside air thermostat in series with the flow

switch to stop or prevent the unit from operating below

the recommended ambient temperatures.

EVP Chiller Units

• Install proper grounding wires to an earth ground.

• Install an outside air thermostat in series with the flow

switch to stop or prevent the unit from operating below

the recommended ambient temperatures.

Low Voltage Wiring (AC & DC)

Variable Air Volume (VAV) Units

• Install a field provided remote system control switch to

activate the system.

• Connect properly sized wiring from the field provided

economizer, if applicable, to the discharge air

controller in the unit control panel.

• Install and connect properly sized wiring from the night

setback relay contacts to the proper termination points

inside the unit control panel. Verify the appropriate

jumpers have been removed.

• Install the suction line thermostat onto the suction line.

Connect properly sized wiring between the thermostat

and terminal strip 7TB7 in the unit control panel.

• Install the discharge air sensor and wire it to the

discharge air controller with shielded cable.

Constant Volume Units

• 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.

• Install the discharge air sensor and connect it to the

master energy controller (MEC) with shielded cable.

• Connect properly sized wiring from the field provided

economizer, if applicable, to the master energy

controller (MEC) in the unit control panel.

EVP Chillers

• Install the appropriate jumpers on the chilled water

temperature controller for hot gas bypass operation (if

applicable). Refer to the control wiring diagram that

shipped with the unit for jumper details.

• Install and connect the chilled water temperature

sensor to the chilled solution temperature controller

with shielded cable.

• Install the proper staging resistor on to the chilled

water temperature controller.

Refrigerant Line Components

Suction line refrigerant components necessary for field

installation in the suction line are a filter (Core Type),

access valves (ports), FrostatTM control for coil frost

protection, and ball shutoff valves. They are placed in the

suction line as illustrated in Figure 27, p. 38.

The required liquid line refrigerant components include a

filter drier (Core Type), access valve(s) or (ports), solenoid

valve(s), moisture indicating sight glass, expansion

valve(s), and ball shutoff valve(s). They are placed in the

liquid line as shown in Figure 27.

Suction And Liquid Line Filter/Filter Drier

(Field Supplied)

Install the filter in the suction line upstream of the

compressors. To prevent oil accumulation, suction filters

should be installed vertical with the outlet at the bottom as

shown in Figure 27 or no more than 45° from vertical.

Install the filter drier in the liquid line as close as possible

to the expansion valves. Locate them upstream of the

moisture indicator and solenoid valve.

For recommended components, refer to the latest edition

of the Applications Guide SS-APG012-EN.

Liquid Line Moisture Indicator Sight Glass

To aid in troubleshooting, install a moisture indicator sight

glass in the liquid line near the evaporator, downstream of

the solenoid valve prior to any branch takeoffs to the

expansion valve. The sight glass should not be used to

determine adequate refrigerant charge. Liquid

temperature and discharge pressure measurements are

required to determine the proper charge. Note that under

some conditions, charging until the sight glass is solid

liquid will overcharge the system and reduce compressor

reliability. Refer to "Compressor Startup" for proper

system charging.

For recommended components, refer to the latest edition

of Applications Guide SS-APG012-EN.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

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.

Installation

SS-SVX11H-EN 37

Liquid Line Solenoid Valves

Liquid line isolation solenoid valves (one per refrigeration

circuit) are required for refrigerant migration control into

evaporator during “Off” cycle and should be connected as

illustrated in applicable field connection diagram.

For recommended components, see latest edition of

application guide, SS-APG012-EN.

Thermostatic Expansion Valve (TXV)

Trane recommends a balance-ported externally equalized

valve in order to maintain satisfactory superheat control

down to lower valve loading conditions and to

compensate for pressure drops between the expansion

valve and superheat control point (evaporator refrigerant

outlet). For fin and tube evaporator applications, a 30%

bleed port TXV is required for 20-60T units and a 15% bleed

port is required for 80-120T units.

In order to get proper refrigerant distribution into the coil,

an expansion valve is required for each coil distributor.

TXV for Remote Chiller

Piping between TXV and Chiller, a braze plate heat

exchanger (BPHE), must be 8-12” long and same size as

BPHE inlet ID. Field supplied reducer(s) may be required at

TXV. A bleed port valve is not required with brazed plate

heat exchanger applications.

Note: Install reducers at the TXV outlet only.

See Figure 19, p. 25 through Figure 23, p. 29 for BPHE inlet

dimensions.

Table 8. Valve selection

Capacity

Bleed Applicable Units Min Max Selection(a) Alternate(a)

0Any BPHE ALL Fin and Tube

OD Coils

1.5 2 BBIZE-1-1/2-GA ERZE-1-1/2-GA

2 3 BBIZE-2-GA ERZE-2-GA

2.5 4 BBIZE-3-GA ERZE-3-GA

3.5 5.5 BBIZE-4-GA ERZE-4-GA

4.5 6.5 BBIZE-5-GA ERZE-5-GA

5.5 7.5 BBIZE-6-GA ERZE-6-GA

6.5 10.5 BBIZE-8-GA ERZE-8-GA

8.5 13.5 BBIZE-12-1/2-GA ERZE-12-1/2-GA

11 16.5 BBIZE-15-GA ERZE-15-GA

13 22 OZE-20-GA

17 26 OZE-25-GA

20.5 39 OZE-35-GA

30.5 59 OZE-50-GA

45.5 70 OZE-60-GA

15 80-120 MCHE

2 2.5 BBIZE-1-1/2-GA-B15 EBQE Body + BQC-A-B15 + KT-45-ZGA

2.5 3 BBIZE-2-GA-B15 EBQE Body + BQC-B-B15 + KT-45-ZGA

3 4.5 BBIZE-3-GA-B15 EBQE Body + BQC-B-B15 + KT-45-ZGA

4 6 BBIZE-4-GA-B15 EBQE Body + BQC-C-B15 + KT-45-ZGA

5 7.5 BBIZE-5-GA-B15 EBQE Body + BQC-C-B15 + KT-45-ZGA

6 9 BBIZE-6-GA-B15 ERZE-8-GA-B15

7 12 BBIZE-8-GA-B15 ERZE-8-GA-B15

9.5 15.5 BBIZE-12-1/2-GA-B15 ERZE-12-1/2-GA-B15

12.5 19 BBIZE-15-GA-B15 ERZE-15-GA-B15

15 25 OZE-20-GA-B15

19.5 30 OZE-25-GA-B15

23.5 45 OZE-35-GA-B15

35 68 OZE-50-GA-B15

52.5 70 OZE-60-GA-B15

69.5 70 OZE--GA-B15

30 20-60T MCHE

2 3 BBIZE-1-1/2-GA-B30

2.5 3.5 BBIZE-2-GA-B30

3.5 5 BBIZE-3-GA-B30

4.5 7 BBIZE-4-GA-B30

6 8.5 BBIZE-5-GA-B30

7 10 BBIZE-6-GA-B30

8 13.5 BBIZE-8-GA-B30

11 17.5 BBIZE-12-1/2-GA-B30

14 21.5 BBIZE-15-GA-B30

17 28.5 OZE-20-GA-B30

22 30 OZE-25-GA-B40

(a) Valve part numbers with “-ZGA” in place of “-GA”, may be used interchangeably.

Installation

38 SS-SVX11H-EN

Access Valves (Ports)

The access ports in the liquid line allows the unit to be

charged with liquid refrigerant and is used to determine

sub-cooling.

The access ports in the suction line allow the operating

suction pressure to be checked across the suction line

filter. These ports are usually a Schrader valve with core.

Ball Shutoff Valves

The ball shutoff valve allows for isolation of the Filter/Filter

Drier for easier core replacement.

Two ball shutoff valves equal to the OD Tubing size for both

the liquid line and suction line are required.

Frostat™ Coil Frost Protection

The Frostat control is the preferred method of coil frost

protection. The Frostat control bulb is mechanically

attached to the suction line near the evaporator and wired

to the unit control panel. Refer to the proper field

connection diagram for details.

Split System Component Number Definitions

1. Interconnecting Suction Line Tubing

2. Suction Line Filter

3. Shutoff Valves - Manual ball valves

4. Interconnecting Liquid Line Tubing. If risers exceed 10

feet, Trane must review the application

5. Shutoff valves - Manual ball valves

6. Access Ports

7. Liquid Line Filter Drier

8. Liquid Line Solenoid Valve

9. Moisture and Liquid Indicator

10. Frostat™ (Required for coil freeze protection)

11. Expansion Valve (One Expansion Valve for each Coil

Distributor)

12. Evaporator Coil

Refrigerant Piping

Refrigerant piping must be properly sized and applied.

These two factors have a very significant effect on both

system performance and reliability.

Note: Use Type “L” refrigerant grade copper tubing only.

Refrigerant Piping should be sized and laid out according

to the job plans and specifications. This should be done

when the system components are selected.

Figure 27. Typical placement of split system piping components

NOTICE:

Equipment Damage!

Compressors contain POE oil which readily absorbs

moisture directly from the air. Moisture absorbed by

POE oil is very difficult to remove by evacuation and

can cause compressor failure. To prevent

contamination, this unit shipped sealed containing dry

nitrogen. Minimize the amount of time the system is

open to the atmosphere. When open, flow dry nitrogen

through the piping to prevent atmospheric moisture

from contacting compressor POE oil.

Installation

SS-SVX11H-EN 39

Suction Line Piping

Proper suction line sizing is required to guarantee that oil

is returned to the compressor throughout the operating

system. Furthermore, the line must be sized so that the

pressure drop does not excessively affect capacity or

efficiency. To accomplish both, it may be necessary to have

two sizes, one for horizontal run and vertical drops, and

another for the vertical lifts. The suction line size pre-

selected in Table 9, p. 39 are independent of the line length

for a properly charged RAUJ unit operating in a normal air

conditioning application.

For more information, refer to the latest edition of

Application Guide SS-APG012-EN.

1. Do not use suction line traps.

2. Do not use double risers.

3. Avoid putting liquid lines underground.

4. Route suction lines as short and direct as possible.

5. Slope suction lines toward the evaporator ¼-inch to 1-

inch for every 10 feet.

6. Insulate the suction lines.

7. The suction line filter should be as close to the

compressor as possible.

Note: If Suction Riser Exceeds 50 Feet, Trane Must

Review The Application.

Liquid Line Piping

Oversized liquid lines reduce compressor reliability due to

excess refrigerant in the system, and system operation

becomes more charge critical due to liquid thermal

expansion into the condenser at higher ambients.

Conversely, liquid line OD needs to be big enough to allow

for adequate subcooling entering the expansion valve at

high load conditions. The preselected lines in Tab l e 10 ,

p. 40 are independent of line length or rise within the

limitations of the latest edition of the Application Guide

SS-APG012-EN.

The liquid line should have a slight slope in the direction

of flow so that it can be routed with the suction line.

The unit has a liquid line check valve that prevents liquid

refrigerant from flowing backward through the liquid line,

filling the condenser, and overflowing to the compressor

during the “Off” cycle. A relief valve is also installed to

prevent the buildup of high pressure in the liquid line

when the unit is off. For proper operation of the relief valve,

the liquid line service valve should not be in the back

seated position but cracked open so the relief valve (and

the fan pressure switch) is open to the condenser. The line

that connects the outlet of the 235 psig relief valve to the

liquid line service valve must not be removed.

For more information, refer to the latest edition of

Application Guide SS-APG012-EN.

1. Avoid putting liquid lines underground.

2. Route liquid lines as short and direct as possible.

3. Slope liquid lines away from the condensing unit 1-

inch for every 10 feet.

4. Only insulate liquid lines that pass through heated

areas.

5. Wire solenoid valves according to the field connection

diagram for proper operation.

6. The liquid line filter drier should be as close to the

solenoid valve as possible.

Table 9. Suction line interconnecting tubing

Capacity

OD unit

connection

(Per circuit)

Recommended field piping

OD Horizontal

(Per Circuit)

OD Vertical

(Per Circuit)

20 Ton 1-5/8" 1-5/8" 1-5/8"

25 Ton 1-5/8" 2-1/8" 1-5/8"

30 Ton 1-5/8" 2-1/8" 2-1/8"

40 Ton 1-5/8" 1-5/8" 1-5/8"

50 Ton 1-5/8" 2-1/8" 1-5/8"

60 Ton 1-5/8" 2-1/8" 2-1/8"

80 Ton 2-5/8" 2-1/8" 2-1/8"

100 Ton 2-5/8" 2-5/8" 2-1/8"

120 Ton 2-5/8" 2-5/8" 2-1/8"

Note: If risers exceed 50 feet, the application must be reviewed by Trane.

Table 9. Suction line interconnecting tubing

Capacity

OD unit

connection

(Per circuit)

Recommended field piping

OD Horizontal

(Per Circuit)

OD Vertical

(Per Circuit)

Installation

40 SS-SVX11H-EN

Note: If the liquid line riser exceeds 10 feet, refer to Tube

Size and Component Selection, publication

number SS-APG012-EN

Typical Field-Installed Evaporator Piping:

Dual-Circuit Examples

1. Install the TXV directly to the unit liquid connection.

2. Locate the TXV bulb midway between the 90 degrees

bends on top of the suction line as illustrated in

Figure 28, p. 40 and Figure 29, p. 41.

3. Secure bulb to suction line with two clamps provided

by manufacturer and insulate bulb.

4. Install the Frostat™ according to instructions enclosed

in the kit as close to evaporator as possible. Although

it may look like a trap, it is the result of going down past

the last outlet and turning to go up.

Note: All 20-60T units will require 30% bleed TXVs. All 80-

120T units will require 15% bleed TXVs. This does

not apply if they are connected to remote chiller

evaporators (see next section).

Table 10. Liquid line interconnecting tubing

Capacity

OD unit

connection

(Per Circuit)

Recommended field piping

OD Horizontal

(Per Circuit)

OD Vertical

(Per Circuit)

20 Ton 7/8" 5/8" 5/8"

25 Ton 7/8" 7/8" 7/8"

30 Ton 7/8" 7/8" 7/8"

40 Ton 7/8" 5/8" 5/8"

50 Ton 7/8" 7/8" 7/8"

60 Ton 7/8" 7/8" 7/8"

80 Ton 1-1/8" 1-1/8" 1-1/8"

100 Ton 1-1/8" 1-1/8" 1-1/8"

120 Ton 1-1/8" 1-1/8" 1-1/8"

Note: If risers exceed 10 feet, refer to Tube S ize an d Component Selection,

publication SS-APG012-EN.

Table 10. Liquid line interconnecting tubing

Capacity

OD unit

connection

(Per Circuit)

Recommended field piping

OD Horizontal

(Per Circuit)

OD Vertical

(Per Circuit)

Figure 28. Face-split

liquid line

(circuit 1)

filter drier

thermal expansion

valves (TXV)

liquid line

(circuit 2)

distributor

solenoid

valve

sight

glass

Evaporator Coil

with Horizontal-Split

(Standard) Circuiting

suction line

(circuit 2)

suction line

(circuit 1)

Installation

SS-SVX11H-EN 41

Typical Field-Installed EVP Chiller

Evaporator Piping

1. Install the TEV(s) directly to the unit liquid connection.

See TEV recommendations in the Tube Size and

Component Selection Application Guide, publication

number SS-APG012-EN.

2. Locate TEV bulb on top of the suction line 12” from the

heat exchanger outlet.

3. Secure the bulb to the suction line with two clamps

provided by the manufacturer and insulate the bulb.

4. Locate liquid line solenoid valve(s) near TEV.

5. Install the Frostat™ according to instructions enclosed

in the kit as close to the evaporator as possible.

Hot Gas Bypass for Commercial Comfort-

Cooling Applications

Hot gas bypass is not recommended for use on RAUJ

units. Frostat™ is the preferred method of protecting the

evaporator from freeze-up. It turns off compressors when

Figure 29. Intertwined

thermal expansion

valves (TXV)

distributor

suction lines

Evaporator Coil with

Intertwined Circuiting

liquid line

(circuit 1)

filter drier

liquid line

(circuit 2)

solenoid

valve

sight

glass

(circuit 1)

(circuit 2)

NOTICE:

Equipment Damage!

The braze connections at the heat exchanger are

stainless steel. Use 40-45% silver brazing alloy BAg-7 or

BAg-29 for copper to steel refrigerant connections at

the chiller. Use flux sparingly to prevent plugging heat

exchanger flow passages. Improper methods could

result in refrigerant leaks or damage to the heat

exchanger. See “Brazing Procedures,” p. 43.

NOTICE:

Evaporator Damage!

To prevent evaporator damage and for proper

refrigerant distribution, an 8-12” stub tube must be

brazed between the expansion valve and the chiller

entering refrigerant connection. This tube must be the

same diameter as the heat exchanger connection ID.

Use reducers only at the expansion valve. See

Figure 19, p. 25 through Figure 23, p. 29 for Chiller inlet

dimensions.

Figure 30. EVP Chiller, Typical Refrigerant Piping (2

circuit system)

GAUGE PORTS &

SUPERHEAT

ADJUSTMENT PORT

#1 SUCTION LINE

#2 SUCTION LINE

CHARGING PORT

EXPANSION VALVE

MOISTURE INDICATOR

SOLENOID VALVE

(MIGRATION ONLY)

REFRIGERANT “SHUT OFF” VALVE

#2 LIQUID LINE

#1 LIQUID

LINE

Installation

42 SS-SVX11H-EN

the coil frosting is sensed. The compressor is allowed to

operate when the coil temperature rises a few degrees

above the frosting condition. This action reduces the

overall energy consumption of the system while reliably

maintaining system control.

For more information, refer to the Hot Gas Bypass

Engineers Newsletter, ADM-APN007-EN.

Optional Pressure Gauges

When a unit is ordered with optional pressure gauges, (“F”

in the miscellaneous digit of the model number), a set of

gauges and the necessary mounting hardware ship in the

location illustrated in the Unit Component “Layout” and

“Shipwith” Location. The mounting location and tubing

configuration for the optional pressure gauges after field

installation is shown below.

1. Assemble the valve depressor, flare nuts, 1/4" copper

tubing, 90 degree flare elbows, gauge & gauge bracket

together as shown in Detail “A” & “B”.

Note: Wrap all appropriate pipe threads with Teflon tape

before assembly.

2. Remove the valve stem cap and place the valve

depressor (with tubing connected) onto the valve stem

and tighten.

Note: Do not install the valve depressor without the

tubing being connected. If gauges need to be

replaced, remove valve depressor from valve stem,

first, to prevent loss of refrigerant charge.

3. Using the gauge bracket as a template for the self

tapping screws, mount the gauge bracket

approximately 1/2" to 3/4" from the outer edge of the

base rail, relative to the compressors for that circuit, as

illustrated.

4. Apply 6" strips of edge protector to both side flanges of

the gauge bracket, to prevent the bracket from cutting

into the power wires.

Figure 31. Pressure gauges 20 - 60 Ton units: plan view

Suction Connection

Figure 32. Pressure gauges 20 - 60 Ton units: front view

Suction Connection

Discharge Connection

Installation

SS-SVX11H-EN 43

Final Refrigerant Pipe Connections

To access the refrigerant pipe connections, remove the

louvered side grills.

These condensing units are shipped with a Nitrogen

holding charge. Install pressure gauges to the appropriate

access valve(s) and take a reading. If no pressure is

present, refer to the “Leak Testing Procedure” section. If

pressure is present, relieve the pressure before attempting

to unsweat the “seal” caps. If refrigerant connections are

not capped, but are “spun-end” tubes, use a tubing cutter

to remove the end from the pipe.

Note: To prevent damage to the system, do not drill a hole

in the seal caps or saw the ends off pipe stubs. This

could introduce copper chips into the system

piping.

Brazing Procedures

Proper brazing techniques are essential when installing

refrigerant piping. The following factors should be kept in

mind when forming sweat connections.

1. When copper is heated in the presence of air, Copper

oxide forms. To prevent copper oxide from forming

inside the tubing during brazing, sweep an inert gas,

such as dry nitrogen, through the tubing. Nitrogen

displaces air in the tubing and prevents oxidation of

the interior surfaces. A nitrogen flow of one to three

cubic feet per minute is sufficient to displace the air.

Use a pressure regulating valve or flow meter to

control the flow.

2. Ensure that the tubing surfaces to be brazed are clean,

and that the ends of the tubes have been carefully

reamed to remove any burrs.

3. Make sure the inner and outer tubes of the joint are

symmetrical and have a close clearance, providing an

easy slip fit. If the joint is too loose, the tensile strength

of the connection will be significantly reduced. The

overlap distance should be equal to the diameter of the

inner tube.

4. Wrap the body of each refrigerant line component with

a wet cloth to keep it cool during brazing. Move any

tube entrance grommets away for the brazing area.

Figure 33. Pressure gauges 80 - 120 Ton units: front view

WARNING

Hazard of Explosion and Deadly Gases!

Never solder, braze or weld on refrigerant lines or any

unit components that are above atmospheric pressure

or where refrigerant may be present. Always remove

refrigerant by following the guidelines established by

the EPA Federal Clean Air Act or other state or local

codes as appropriate. After refrigerant removal, use dry

nitrogen to bring system back to atmospheric pressure

before opening system for repairs. Mixtures of

refrigerants and air under pressure may become

combustible in the presence of an ignition source

leading to an explosion. Excessive heat from soldering,

brazing or welding with refrigerant vapors present can

form highly toxic gases and extremely corrosive acids.

Failure to follow all proper safe refrigerant handling

practices could result in death or serious injury.

WARNING

Hazard of Explosion!

Use only dry nitrogen with a pressure regulator for

pressurizing unit. Do not use acetylene, oxygen or

compressed air or mixtures containing them for

pressure testing. Do not use mixtures of a hydrogen

containing refrigerant and air above atmospheric

pressure for pressure testing as they may become

flammable and could result in an explosion.

Refrigerant, when used as a trace gas should only be

mixed with dry nitrogen for pressurizing units. Failure

to follow these recommendations could result in death

or serious injury or equipment or property-only

damage.

Installation

44 SS-SVX11H-EN

Note: Use 40 to 45% silver brazing alloy (BAg-7 or BAg-

28) on dissimilar metals. Use BCup-6 brazing alloy

on copper to copper joints.

5. If flux is used, apply it sparingly to the joint. Excessive

flux can enter the system which will contaminate the

refrigerant system.

6. Apply heat evenly over the length and circumference

of the joint to draw the brazing material into the joint

by capillary action. Remove the brazing rod and flame

from the joint as soon as a complete fillet is formed to

avoid possible restriction in the line.

7. Visually inspect the connection after brazing to locate

any pin holes or crevices in the joint. The use of a

mirror may be required, depending on the joint

location.

Leak Testing Procedure

When Leak-testing a refrigerant system, observe all safety

precautions.

Trane condensing units are shipped with a Nitrogen

holding charge. If there is no pressure, the unit must be

leak tested to determine the location of leak as follows:

Note: These service procedures require working with

refrigerant, Do NOT release refrigerant to the

atmosphere! The service technician must comply

with all federal, state, and local laws.

Use refrigerant gas as a tracer for leak detection and use

oil-pumped dry nitrogen to develop the required test

pressure. Test the high and low side of the system at

pressures dictated by local codes.

1. Close the field supplied liquid line service valve(s)

installed near the evaporator and the compressor

discharge service valve to isolate the system's high

side from the low side. Pressure test the liquid line,

discharge line, and condenser coils at pressures

dictated by local codes. Do not exceed 10# above the

pressure control settings.

2. Connect a refrigerant cylinder to the charging port of

the liquid line service valve. Use the refrigerant to raise

the high side pressure to 12 to 15 psig.

3. Disconnect the refrigerant cylinder. Connect a dry

nitrogen cylinder to the charging port and increase the

high side pressure. Do not exceed the condenser

maximum working pressure listed on the unit

nameplate.

4. Use a leak detector or soap bubbles to check for leaks.

Check all piping joints, valves, etc...

5. If a leak is located, use proper procedures to remove

the refrigerant/nitrogen mixture, break the connection

and remake as a new joint. Retest for leaks after making

repairs.

6. Repeat the test procedure for the low side of the

system, charging through the suction pressure gauge

port or through an access provided on the suction line

by the installer. Increase the system pressure to 100

psig.

7. If a leak is located, use proper procedures to remove

the refrigerant/nitrogen mixture, break the connection

and remake as a new joint. Retest for leaks after making

repairs.

8. Open the liquid line service valve and the compressor

discharge service valve.

Remote EVP Chiller

Water Treatment

The use of untreated or improperly treated water could

result in scaling, erosion, corrosion, and algae or slime

buildup in the heat exchanger. This will adversely affect

WARNING

Hazard of Explosion!

Use only dry nitrogen with a pressure regulator for

pressurizing unit. Do not use acetylene, oxygen or

compressed air or mixtures containing them for

pressure testing. Do not use mixtures of a hydrogen

containing refrigerant and air above atmospheric

pressure for pressure testing as they may become

flammable and could result in an explosion. Refrigerant,

when used as a trace gas should only be mixed with

dry nitrogen for pressurizing units. Failure to follow

these recommendations could result in death or serious

injury or equipment or property-only damage.

WARNING

Hazard of Explosion!

Never use an open flame to detect gas leaks. It could

result in an explosion. Use a leak test solution for leak

testing. Failure to follow recommended safe leak test

procedures could result in death or serious injury or

equipment or property-only-damage.

NOTICE:

Proper Water Treatment!

The use of untreated or improperly treated could result

in scaling, erosion, corrosion, algae or slime. It is

recommended that the services of a qualified water

treatment specialist be engaged to determine what

water treatment, if any, is required. Trane assumes no

responsibility for equipment failures which result from

untreated or improperly treated water, or saline or

brackish water.

NOTICE:

Heat Exchanger Damage!

The use of untreated or improperly treated water could

result in heat exchanger fouling and permanent

damage to the heat exchanger.

Installation

SS-SVX11H-EN 45

system capacity. Proper water treatment must be

determined locally and depends on the type of system and

local water characteristics. Neither salt nor brackish water

is recommend, use of either will lead to a shortened heat

exchanger life. Trane encourages employment of a

qualified water treatment specialist, familiar with local

water conditions, to assist in the establishment of a proper

water treatment program.

Water Flow Limits

The minimum and maximum water flow rates are given in

the General Data section. Water flow rates below the

tabulated values will result in laminar flow causing freeze-

up problems, scaling, stratification and poor system

control. Flow rates exceeding the maximum listed could

result in very high pressure drop, erosion of the heat

exchanger and damage to the water flow switch.

Water Temperature Limits

Catalog chiller performance data is based on a water

temperature drop of 10°F . Full load chilled water

temperature drops from 8 to 14°F may be used as long as

minimum and maximum water temperature and

minimum and maximum flow rates are not violated.

Leaving water temperatures below 42°F require freeze

protection down to 15°F. The maximum water temperature

that can be circulated through the chiller when the unit is

not operating is 125°F. Evaporator damage could result

above this temperature.

Short Water Loops

Adequate chilled water system water volume is an

important system design parameter because it provides

for stable chilled water temperature control and helps limit

unacceptable short cycling of chiller compressors.

Typically, a five-minute water loop circulation time is

sufficient to prevent short water loop issues. Therefore, as

a guideline, ensure the volume of water in the chilled water

loop equals or exceeds five times the evaporator flow rate.

For systems with a rapidly changing load profile the

amount of volume should be increased.

Note: Water volumes should be calculated as close as

possible to maintain constant water flow through

the water loop.

Chilled Water Piping

Typical Water Piping. Figure 36, p. 48 illustrates typical

water piping components for remote chiller applications.

(Remote Chiller accessory kit includes strainer, water flow

switch, pipe stubs, couplings, evaporator insulation and

mounting legs, and a ship separate braze plate heat

exchanger.)

Foreign matter in the chilled water system will increase

pressure drop and reduce water flow. Installation of a

properly selected strainer is also necessary to prevent

debris larger than 0.039” from entering the heat

exchanger. All building piping must be thoroughly flushed

before making the final piping connections to the heat

exchanger. The strainer must also be cleaned prior to

initial start-up.

Important: Start up without flushing building piping

risks plugging chiller with debris and

reducing capacity.

To reduce heat loss and prevent condensation, insulation

should be applied to piping. Expansion tanks are also

usually required to accommodate chilled water volume

changes.

Braze Plate (BPHE) Chiller. Evaporator water inlet and

outlet types, sizes and locations are shown in Figure 19,

p. 25 to Figure 23, p. 29. Installation of a field provided 1/

2” x 14NPTE stainless steel or PVC plug is required.

Strainer. Install a strainer in the water supply line to

protect the chiller from plugging with system piping

debris. Strainers should be installed as close as practical to

the heat exchanger water inlet (the remote chiller

accessory kit includes strainer and piping to connect with

NOTICE:

Heat Exchanger Damage!

Water flow rates beyond the heat exchanger limits

could result in permanent damage to the heat

exchanger.

NOTICE:

Heat Exchanger and Compressor

Damage!

Leaving water temperatures below 42°F require glycol

protection down to 15°F. Otherwise, water freezing in

brazed plate chiller could rupture separation between

refrigerant and water flow channels necessitating heat

exchanger/compressor replacement and system

cleanup.

NOTICE:

Heat Exchanger Damage!

The brazed plate heat exchanger could be damaged by

excessive refrigerant pressures if circulating water

temperatures exceed 125°F when the unit is not

operating..

NOTICE:

Compressor Damage!

Water loops with less than five minute circulation time

could result in poor superheat control and compressor

damage.

Installation

46 SS-SVX11H-EN

BPHE). A field provided blow down valve (recommended)

or plug must be installed in strainer cleanout if not present.

Chiller Water Flow Switch.

Install a flow switch or other flow sensing device,

illustrated in Figure 34, to prevent or stop the compressor

operation if the water flow drops below minimum limits.

Locate the device in the chilled water return line as shown

in Figure 36, p. 48. Install per switch manufacturer’s

instructions and refer to the field wiring and unit

schematics for the flow switch electrical interlock

connections. Adjust switch trip point to prevent operation

below minimum limits.

The water flow switch included in the EVP chiller accessory

kit must be adjusted to prevent flow below the minimum

limit. To set the flow limit:

1. Establish minimum water flow.

2. Rotate the flow switch adjustment screw until the

switch opens. This gets close to the correct setting but

final adjustment must be done without water flow.

3. Beginning from water off, start flow and adjust GPM

until the switch trips. If flow rate is below minimum,

stop water flow and rotate adjusting screw

accordingly.

4. Repeat until the switch trips at or above minimum flow.

Note: Use pressure gauge(s) and Water Pressure Drop

table to determine water flow rate. See General

Data for minimum flow limits.

Air Vents. Vents must be installed at high points in the

piping system to facilitate air purging during the filling

process. Air vents between the system shut off valve and

Table 11. Chiller water pressure drop, Ft H2O

Flow Size, Tons

GPM20253040506080100120

25 3.7

30 5.2 3.2

35 6.9 4.2

40 8.8 5.4 3.1

45 10.9 6.7 3.9

50 13.3 8.2 4.8 5.3

60 18.5 11.4 6.7 7.5 4.1

70 24.6 15.2 8.9 10.1 5.5

80 19.4 11.4 13.0 7.1 5.0

90 24.1 14.2 16.3 8.9 6.3

100 17.3 19.9 10.9 7.7 4.3

120 28.3 15.4 10.9 6.1 3.2

140 20.7 14.6 8.2 4.4

160 26.7 18.9 10.6 5.6 4.8

180 23.6 13.2 7.1 6.1

200 16.2 8.7 7.4

240 22.9 12.3 10.6

280 16.5 14.2

320 21.3 18.3

360 26.7 23.0

400 28.2

NOTICE:

Evaporator Damage!

To prevent evaporator damage, do not use water flow

switch to cycle the system.

NOTICE:

Evaporator Damage!

Operation at water flow rates below the minimum

limits could result in permanent damage to the heat

exchanger and compressors.

Figure 34. Optional flow switch

Figure 35. Freezestat Bulb-well, Temperature Sensor

and Well

Installation

SS-SVX11H-EN 47

heat exchanger are also useful for EVP chiller service and

shutdown.

Water Pressure Gauges.

Install pressure gauge(s) to monitor the entering and

leaving chilled water pressure, and strainer condition.

Water Shutoff Valves. Provide shutoff valves in the

"Supply" and "Return" pipe near the chiller so the gauge(s),

thermostats, sensors, strainer, etc., can be isolated during

service.

Pipe Unions. Use pipe unions to simplify disassembly

for system service. Use vibration eliminators to prevent

transmitting vibrations through the water lines.

Thermometers. Install thermometers in the lines to

monitor the evaporator entering and leaving water

temperatures.

Balancing Valves. Install a balancing cock (valve) in the

leaving water line. It will be used to establish a balanced

flow.

Note: Both the entering and leaving water lines should

have shutoff valves installed to isolate the

evaporator for service.

Chiller Drain. Drain piping, with shut off valve, must be

installed at the lowest point between the chiller and

system piping valves to allow water removal for service

and shut down procedures. The drain must be piped to a

suitable facility.

Note: Insure that the drain is closed before filling system

with water.

Water Temperature Sensor. The Temperature Sensor

and Sensor-well must be installed in the leaving water

piping as close to the chiller as possible. Both devices are

located inside the remote panel. Thermal paste is also

provided inside the remote panel and must be used when

installing the sensor into the sensor-well. Figure 35, p. 46

illustrates the Sensor-well dimensions.

Freezestat. A Bulb-well (located inside the remote panel)

must be installed in the leaving water piping as close to the

chiller as possible. It should be located upstream of the

Temperature Sensor location. The Freezestat, located

within the remote panel, is equipped with a remote

Sensing Bulb and 20 feet of capillary tube. The Remote

Sensing Bulb must be installed by the installing personnel.

Thermal paste is also provided inside the remote panel

and must be used when installing the bulb into the bulb-

well. Figure 35, p. 46 illustrates the Bulb-well dimensions.

Important: Isolate the water pumps from the system

piping to avoid vibration transmission.

Insulate all water piping. Use appropriate

pipe sealant on all threaded connections.

Final Water Piping Connections

1. All water piping in the system must be flushed

thoroughly before making the final connections.

2. Clean strainer.

3. Connect the water pipe to the EVP chiller.

4. Make sure the 1/2” x 14NPTE plug is installed.

5. Close the drain shutoff valve.

6. While filling the chiller system with solution, vent the

air from the system at the highest points.

NOTICE:

Evaporator Damage!

To prevent evaporator damage do not exceed 150 psig

evaporator pressure.

NOTICE:

Equipment Damage!

Failure to use thermal paste could result in erratic

temperature sensing resulting in equipment damage.

NOTICE:

Equipment Damage!

If an acidic commercial flushing solution is used,

bypass the EVP chiller to prevent damage to the heat

exchanger.

Installation

48 SS-SVX11H-EN

Notes:

1. Shutoff valves are required for evaporator servicing.

2. Evaporator is shown for illustration purposes only.

3. Water inlet, outlet diameter dimensional locations depend on unit size.

4. Water connections at the evaporator are grooved.

5. Field supplied 1/2” x 14 NPTE stainless steel or PVC plug required.

6. Locate freezestat and discharge temperature sensors close to the water outlet.

7. Install drain with shutoff valve at low point in leaving piping before system valve.

Field Installed Power Wiring

An overall dimensional layout for the field installed wiring

entrance into the unit is illustrated in Figure 5, p. 11 to

Figure 18, p. 24. To insure that the unit’s supply power

wiring is properly sized and installed, follow the guidelines

outlined below.

Verify that the power supply available is compatible with

the unit’s nameplate ratings. The available supply power

must be within 10% of the rated voltage stamped on the

nameplate.

Disconnect Switch External Handle (20-

120 Ton Factory Mounted Option)

Units ordered with the factory mounted nonfused

disconnect switch comes equipped with an externally

mounted handle. This allows the operator to disconnect

power from the unit without having to open the control

panel door. Handle locations and its three positions are

shown below;

“ON” - Indicates disconnect switch is closed, allowing

main power supply to be applied at unit.

“OFF” - Indicates disconnect switch is open, interrupting

main power supply to unit controls.

“OPEN COVER/RESET” - Turning the handle to this

position releases the handle form the disconnect switch,

allowing the control panel door to be opened.

Once the door has been opened, it can be closed with the

handle in any one of the three positions outlined above,

provided it matches the disconnect switch position.

The handle can be locked in the “OFF” position. While

holding the handle in the “OFF” position, push the spring

loaded thumb key, attached to the handle, into the base

slot. Place the lock shackle between the handle and the

thumb key. This will prevent it from springing out of

position.

Figure 36. EVP Chiller, Typical Water Piping

PIPE CONNECTIONS

WATER STRAINER

AIR VENTS

PRESSURE GAUGE

UNIONS

VIBRATION ELIMINATORS

THERMOMETERS

GATE VALVES

RETURN LINE (INLET)

(SEE NOTE 1)

SUPPLY LINE OUTLET

FLOW SWITCH

AIR VENTS

SHUTOFF VALVES

UNIONS

VIBRATION ELIMINATORS

BALANCING VALVE

GATE VALVES

SUPPLY LINE OUTLET

NOTICE:

Use Copper Conductors Only!

Unit terminals are not designed to accept other types

of conductors. Failure to use copper conductors could

result in equipment damage.

Installation

SS-SVX11H-EN 49

Main Unit Power Wiring Table 12, p. 49 lists the field connection wire ranges for

both the main power terminal block 1TB1 and the optional

main power disconnect switch 1S1. The unit electrical data

is listed in Table 14, p. 51 and Table 15, p. 52. The electrical

service must be protected from over current and short

circuit conditions in accordance with NEC requirements.

Protection devices must be sized according to the

electrical data on the nameplate. Refer to the “Power Wire

Sizing & Protection Device Equations”, for determining:

a. the appropriate electrical service wire size based on

“Minimum Circuit Ampacity” (MCA),

b. the “Maximum Over current Protection” (MOP)

device.

c. the “Recommended Dual Element fuse size” (RDE).

1. If the unit is not equipped with an optional factory

installed non-fused disconnect switch, a field supplied

disconnect switch must be installed at or near the unit

in accordance with the National Electrical Code (NEC

latest edition). Refer to the “Power Wire Sizing &

Protection Device Equations” (DSS calculation), for

determining the correct size.

2. Complete the unit’s power wiring connections onto

either the main terminal block 1TB1, or the factory

mounted non-fused disconnect switch 1S1, inside the

unit control panel. Refer to the customer connection

diagram that shipped with the unit for specific

termination points.

3. Provide proper grounding for the unit in accordance

with local and national codes.

Power Wire Sizing and Protection Device

Equations

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

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 37. Disconnect switch details

Table 12. Customer connection wire range 20 - 60 Ton units

Installation

50 SS-SVX11H-EN

To correctly size the main power wiring for the unit, use the

appropriate calculation(s) listed below. Read the load

definitions that follow and use Calculation #1 for

determining the MCA (Minimum Circuit Ampacity), MOP

(Maximum Over current Protection), and RDE

(Recommended Dual Element fuse size) for each unit. Use

Calculation #2 to determine the DSS (Disconnect Switch

Size) for each unit.

Load Definitions:

LOAD 1 = CURRENT OF THE LARGEST MOTOR

(COMPRESSOR OR FAN MOTOR)

LOAD 2 = SUM OF THE CURRENTS OF ALL

REMAINING MOTORS

LOAD 4 = CONTROL POWER TRANSFORMER

= AND ANY OTHER LOAD RATED AT 1 AMP OR

MORE

Calculation #1

(MCA, MOP, and RDE)

MCA = (1. 2 5 x LOAD 1) + LOA D 2 + LOA D 4 MOP

= (2.25 x LOAD 1) + LOAD 2 + LOAD 4

Select a fuse rating equal to the MOP value. If the MOP

value does not equal a standard fuse size as listed in NEC

240 - 6, select the next lower standard fuse rating.

Note: If selected MOP is less than the MCA, then select

the lowest standard maximum fuse size which is

equal to or larger than the MCA, provided the

selected fuse size does not exceed 800 amps.

RDE = (1.5 x LOAD 1) + LOAD 2 + LOAD 4

Select a fuse rating equal to the RDE value. If the RDE value

does not equal a standard fuse size as listed in NEC 240 -

6 select the next higher standard fuse rating.

Note: If the selected RDE is greater than the selected MOP

value, then select the RDE value to equal the MOP

value.

Calculation #2

Disconnect Switch Sizing (DSS)

DSS = 1.15 X (LOAD 1 + LOAD 2 + LOAD 4)

Table 13. Customer connection wire range 80 - 120 Ton units

Installation

SS-SVX11H-EN 51

Table 14. Electrical service sizing data (20-60 Ton units)

Unit Characteristics Condenser Fan Motor Compressor Motor

Model

Electrical

Characteristics

Allowable

Voltage

Range

Min.

Circuit

Amp

Max.

Overcurrent

Protection

Rec.

Dual

Element

Fuse

Size KW NO HP FLA LRA NO

1A/ 2A

RLA

1B/2B

RLA

1A/2A

LRA

1B/2B

LRA

20 Ton

200/60/3XL 180-220 102 125 125 0.9 2 1 4.1 20.7 2 41.4 41.4 267 267

230/60/3XL 208-254 89 110 100 0.9 2 1 4.1 20.7 2 35.5 35.5 267 267

460/60/3XL 416-508 46 60 60 0.9 2 1 1.8 9.0 2 18.6 18.6 142 142

575/60/3XL 520-635 39 50 45 0.9 2 1 1.4 7.2 2 15.8 15.8 103 103

380/415/50/3XL 342-418

373-456 46 60 50 0.75 2 1 1.7 9.2 2 18.6 18.6 142 142

25 Ton

200/60/3XL 180-220 119 150 150 0.9 3 1 4.1 20.7 2 41.4 52 267 315

230/60/3XL 208-254 107 150 125 0.9 3 1 4.1 20.7 2 35.5 47 267 315

460/60/3XL 416-508 52 70 60 0.9 3 1 1.8 9.0 2 18.6 22.2 142 158

575/60/3XL 520-635 44 60 50 0.9 3 1 1.4 7.2 2 15.8 19.2 103 136

380/415/50/3XL 342-418

373-456 52 70 60 0.75 3 1 1.7 9.2 2 18.6 22.2 142 158

30 Ton

200/60/3XL 180-220 141 175 175 0.9 3 1 4.1 20.7 2 56.9 56.9 351 351

230/60/3XL 208-254 123 150 150 0.9 3 1 4.1 20.7 2 48.8 48.8 351 351

460/60/3XL 416-508 63 80 70 0.9 3 1 1.8 9.0 2 25.5 25.5 197 197

575/60/3XL 520-635 57 70 70 0.9 3 1 1.4 7.2 2 23.1 23.1 146 146

380/415/50/3XL 342-418

373-456 63 80 70 0.75 3 1 1.7 9.2 2 25.5 25.5 197 197

40 Ton

200/60/3XL 180-220 193 225 225 0.9 6 1 4.1 20.7 4 41.4 41.4 267 267

230/60/3XL 208-254 168 200 200 0.9 6 1 4.1 20.7 4 35.5 35.5 267 267

460/60/3XL 416-508 87 100 100 0.9 6 1 1.8 9.0 4 18.6 18.6 142 142

575/60/3XL 520-635 73 80 80 0.9 6 1 1.4 7.2 4 15.8 15.8 103 103

380/415/50/3XL 342-418

373-456 86 100 100 0.75 6 1 1.7 9.2 4 18.6 18.6 142 142

50 Ton

200/60/3XL 180-220 236 250 250 0.9 6 1 4.1 20.7 4 47 52 304 315

230/60/3XL 208-254 215 250 250 0.9 6 1 4.1 20.7 4 42.3 47 304 315

460/60/3XL 416-508 102 110 110 0.9 6 1 1.8 9.0 4 20.2 22.2 147 158

575/60/3XL 520-635 86 100 100 0.9 6 1 1.4 7.2 4 17.1 19.2 122 136

380/415/50/3XL 342-418

373-456 101 110 110 0.75 6 1 1.7 9.2 4 20.2 22.2 147 158

60 Ton

200/60/3XL 180-220 267 300 300 0.9 6 1 4.1 20.7 4 56.9 56.9 351 351

230/60/3XL 208-254 232 250 250 0.9 6 1 4.1 20.7 4 48.8 48.8 351 351

460/60/3XL 416-508 120 125 150 0.9 6 1 1.8 9.0 4 25.5 25.5 197 197

575/60/3XL 520-635 107 125 125 0.9 6 1 1.4 7.2 4 20.3 20.3 146 146

380/415/50/3XL 342-418

373-456 119 125 125 0.75 6 1 1.7 9.2 4 25.4 25.4 197 197

Notes:

1. LOAD 1= Current of the largest motor (Compressor or Fan Motor); LOAD 2=Sum of the currents of all remaining motors. LOAD 3= FLA(Full Load

Amps) of the electric heater; LOAD 4= Any other load rated at 1 amp or more.

2. For Electric Heat MCA, MOP, RDE values, calculate for both cooling and heating modes.

3. If selected Max Over Cur is less than the Minimum Circuit Ampacity, then select the lowest maximum fuse size which is equal to or larger than the Min

Circuit Ampacity, provided the selected fuse size does not exceed 800 amps.

Installation

52 SS-SVX11H-EN

Field Installed Control Wiring

Before installing any connecting wiring, refer to Figure 5,

p. 11 to Figure 18, p. 24 for the electrical access locations

provided on the unit. Install appropriately sized control

wiring for the 115 volt electrical components as required

by the application.

Since the unit-mounted 115V control power transformer

(1T1) is provided on all units, it is not necessary to run a

separate 115 volt control power source to the unit.

Note: 200/230 Volt units are shipped with transformer

1T1 wired for 200 volt operation. If the unit is to be

operated on a 230 volt power supply, rewire the

transformer as shown on the unit schematic.

Controls Using 115 VAC

Install appropriately sized 115 volt control wiring for the

electrical components as required by the application.

These components may include:

• Hot gas bypass solenoid wiring;

• Supply fan interlock and control circuit;

• System control switch wiring (“No Control” units);

• Step controller wiring (“No Control” units);

• Chilled water pump interlock wiring (EVP units);

Table 15. Electrical service sizing data (80-120 Ton units)

Unit Characteristics

Condenser Fan

Motor Compressor Motor

Model

Electrical

Characteristics

Allowable

Voltage

Range

Min.

Circuit

Amp

Max.

Overcurrent

Protection

Rec.

Dual

Element

Fuse

Size KW NO HP FLA LRA NO

1A/

2A

RLA

1B/

2B

RLA

1C/

2C

RLA

1A/

2A

LRA

1B/

2B

LRA

1C/

2C

LRA

80 Ton

200/60/3XL 200/60/3XL 411 450 450 0.9 8 1 4.1 20.7 6 60.5 60.5 60.5 320 320 320

230/60/3XL 230/60/3XL 358 400 400 0.9 8 1 4.1 20.7 6 52 52 52 320 320 320

460/60/3XL 460/60/3XL 174 200 175 0.9 8 1 1.8 9 6 25.4 25.4 25.4 160 160 160

575/60/3XL 575/60/3XL 139 150 150 0.9 8 1 1.4 7.2 6 20.3 20.3 20.3 135 135 135

100 Ton

200/60/3XL 200/60/3XL 480 500 500 0.9 12 1 4.1 20.7 6 60.5 60.5 83.9 320 320 485

230/60/3XL 230/60/3XL 425 450 450 0.9 12 1 4.1 20.7 6 52 52 74.5 320 320 485

460/60/3XL 460/60/3XL 207 225 225 0.9 12 1 1.8 9 6 25.4 25.4 37.2 160 160 215

575/60/3XL 575/60/3XL 166 175 175 0.9 12 1 1.4 7.2 6 20.3 20.3 29.8 135 135 175

120 Ton

200/60/3XL 200/60/3XL 574 600 600 0.9 12 1 4.1 20.7 6 83.9 83.9 83.9 485 485 485

230/60/3XL 230/60/3XL 515 600 600 0.9 12 1 4.1 20.7 6 74.5 74.5 74.5 485 485 485

460/60/3XL 460/60/3XL 255 300 300 0.9 12 1 1.8 9 6 37.2 37.2 37.2 215 215 215

575/60/3XL 575/60/3XL 204 225 225 0.9 12 1 1.4 7.2 6 29.8 29.8 29.8 175 175 175

Notes:

1. LOAD 1= Current of the largest motor (Compressor or Fan Motor); LOAD 2=Sum of the currents of all remaining motors. LOAD 3= FLA(Full Load

Amps) of the electric heater; LOAD 4= Any other load rated at 1 amp or more.

2. For Electric Heat MCA, MOP, RDE values, calculate for both cooling and heating modes.

3. If selected Max Over Cur is less than the Minimum Circuit Ampacity, then select the lowest maximum fuse size which is equal to or larger than the Min

Circuit Ampacity, provided the selected fuse size does not exceed 800 amps.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

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 cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Installation

SS-SVX11H-EN 53

• Chilled water flow switch wiring (EVP units);

• Outside air thermostat wiring (EVP units);

• Liquid line solenoid valve(s).

Supply Fan Interlock

Control options utilizing an Air Handler. The

normally open evaporator fan interlock auxiliary contacts

and the evaporator fan controls; system On/Off switch, fan

starter/contactor, and overloads, must be wired as

illustrated in the appropriate interlock connection wiring

diagram for the specified application.

EVP Flow control (6S58). The flow switch is a binary

output device and must be wired within the interlock

circuit. Before installing the control wiring, refer to the

remote panel illustration for the electrical access into the

panel. Refer to the field connection diagram for the specific

connection points inside the remote panel.

Provide a proper ground for all control circuitry at the

ground connection screws provided within both the

remote panel and the unit’s control panel.

EVP Circulating Pump Interlock. Pump operation and

sequence is the responsibility of the installer. During

compressor operation, the fluid flow through the chiller

must be maintained. The field provided; ON/OFF switch,

pump starter/contactor, auxiliary contacts and overloads

(OL’s) must be installed as part of the system’s interlock

circuit to disable the compressors in the event the

circulating pump shuts down or is turned off.

Note: Due to the location of the 5S1 switch within the

circulating pump control circuit, it can be used as a

system ON/OFF switch.

Outside Air Thermostat (5S57). A field provided

outside air thermostat must be installed within the

interlock circuit to prevent the system from operating

below its workable temperature range. Before installing

the control wiring, refer to the remote panel illustration for

the electrical access into the panel. Refer to the field

connection diagram for the specific connection points

inside the remote panel. Refer to the “EVP Chiller

Controls” section for temperature requirements.

Hot Gas Bypass (All control options). If hot gas

bypass is required, refer to the “Refrigerant Piping”

illustration for supporting equipment tubing connections.

Refer to the specific control option field connection

diagram terminal connections for the hot gas bypass

solenoid coils.

Controls using 24 VAC

Before installing any connecting wiring, refer to Figure 5,

p. 11 to Figure 18, p. 24. for the electrical access locations

provided on the unit and Table 16, p. 53 for AC conductor

sizing guidelines, and;

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.

3. Be sure to check all loads and conductors for grounds,

shorts, and miswiring.

4. Do not run the AC low voltage wiring in the same

conduit with the high voltage power wiring.

Typical Low voltage components may include:

• zone thermostat wiring (AC & DC wiring);

• system control switch wiring (VAV units);

• night setback relay wiring (VAV units);

• economizer actuator circuit wiring (VAV units);

• discharge air sensor wiring (VAV units);

• jumpers for hot gas bypass operation;

• chilled water temperature sensor (EVP units).

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

NOTICE:

Equipment Damage!

Resistance in excess of 3 ohms per conductor could

cause component failure due to insufficient AC voltage

supply.

Table 16. 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

Installation

54 SS-SVX11H-EN

Controls using DC Analog Input/Outputs

Before installing any connecting wiring between the unit

and components utilizing a DC analog input/output signal,

refer to Figure 5, p. 11 to Figure 18, p. 24 for the electrical

access locations provided on the unit.

These components for 20 - 60 Ton units may include:

• Field installed Discharge Duct Sensor (6RT1 CV units);

• Field installed Return Duct Sensor (6RT6 CV units);

• Field installed Discharge Air Sensor (6RT3 VAV units);

• Field installed Chilled Water Sensor (6RT2 EVP units);

These components for 80 - 120 Ton units may include:

• Field installed Discharge Air Sensor (8RT3 VAV units);

• Field installed Chilled Water Sensor (8RT2 EVP units).

1. Wiring for the components utilizing a DC analog input/

output signal must be shielded cable (Belden 8760 or

equivalent). Ground the shield at one end only.

2. Tabl e 17, p. 54 lists the conductor sizing guidelines that

must be followed when interconnecting a DC binary

output device to the unit.

Note: Resistance in excess of 2.5 ohms per conductor can

cause deviations in the accuracy of the controls.

3. Ensure that the wiring between the binary controls and

the unit’s termination point does not exceed two and a

half (2.5) ohms/conductor for the length of the run.

4. Do not run the electrical wires transporting DC signals

in or around conduit housing high voltage wires.

Economizer Actuator Circuit

Each unit ordered with the Constant Volume or Variable Air

Volume control option has the capability of controlling a

field installed economizer. The diagram below illustrates a

typical economizer actuator circuit.

When connecting the economizer actuator control circuit

to the terminal board inside the unit control panel, refer to

the actual unit wiring diagram for terminal designation,

i.e. W, B, R, & Y. A separate power supply for the actuator(s)

must be field provided.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Table 17. DC conductors

Distance from Unit to Control

Recommended

Wire Size

000 - 499 feet 16 gauge

500 - 1000 feet 14 gauge

Figure 38. 20 - 60 Ton unit control panel

Installation

SS-SVX11H-EN 55

No System Control

Temperature Control Parameters

Each unit ordered with the “No Controls” option, requires

a field provided and field wired temperature controller.

Single refrigerant circuit units require a 2-step control

device, and dual refrigerant circuit units require a 4-step

(20-60T units) or 6-step (80-120T units) control device.

Each unit is shipped from the factory with internal “Fixed-

On” & “Fixed-Off” time delays wired into each step of

cooling. The “Fixed-Off” timers are 5 minutes each and

they begin timing when the circuit for that step of cooling

is deactivated. The “Fixed-On” timers are 3 minutes each

and they begin timing when the circuit for that step is

activated.

Note: Units ordered with the “No Controls” option

cannot be used with EVP Chiller applications.

Table 18. 80 - 120 Ton unit control panel

Table 19. Economizer actuator circuit legend

Device

Designation Device Designation Parts And Notes

MM Modutral Motor M.H. M955, (Up to 3 motors may be controlled as shown. Additional motors must be

slaved.)

TR Transformer M.H. 13081B; cover mounted

EC Enthalpy Control M.H. H2051046

MP Minimum Position Potentiometer M.H. S96A1012

EFI Evaporator Fan Interlock Field Provided

7TB88 Low Voltage Terminal Strip Located in Temperature Controller Panel

R 1/4 Watt - 5% Carbon

1 Motor/Circuit = None Req.

2 Motors/ circuit = 1300 Ohms

3 Motors/Circuit = 910 Ohms

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Installation

56 SS-SVX11H-EN

Figure 39. Field connection diagram RAUJ20-60 - no system control

2307-9122

Installation

SS-SVX11H-EN 57

Figure 40. Field connection diagram notes - RAUJ 20-60 - all system controls

Installation

58 SS-SVX11H-EN

Figure 41. Field connection diagram RAUJ80-120 - no system control

2307-9144

Installation

SS-SVX11H-EN 59

Figure 42. Field connection diagram notes - RAUJ 80-120 - all system controls

21 ISOLATION LIQUID SOLENOID VALVES (6L1, 6L3) ARE REQUIRED FOR CHARGE ISOLATION (PROVIDED

& INSTALLED BY THE FIELD). UNLOADING LIQUID SOLENOID VALVES (6L2, 6L4), IF APPLICABLE,

ARE PROVIDED & INSTALLED BY THE FIELD.

Installation

60 SS-SVX11H-EN

Variable Air Volume Control (Honeywell

W7100A)

In a variable air volume system, the desired space

temperature is maintained by varying the amount of

conditioned air being delivered to the space. As the

cooling requirements of the space decreases, less air is

delivered to the zone; conversely, as the cooling

requirements of the space increases, a greater volume of

air is delivered to the zone.

The descriptions of the following basic input devices used

with the Honeywell W7100A discharge air controller are to

acquaint the operator with their function as they interface

with the controller. Refer to field connection diagram

numbers 2307-9122 (for 20-60) and 2307-9144 (for 80-120)

for the specific component connections at the unit control

panel.

For discussion of evaporator fan interlock, hot gas bypass,

and economizer connections, refer to the section

“Controls Using 115 VAC,” p. 52.

Refer to wiring notes on Figure 40, p. 57.

Figure 43. Field connection diagram RAUJ20-60 - variable air volume control

2307-9122

Installation

SS-SVX11H-EN 61

Refer to wiring notes on Figure 42, p. 59.

Figure 44. Field connection diagram RAUJ80-120 - variable air volume control

2307-9144

Installation

62 SS-SVX11H-EN

Discharge Air Sensor (Honeywell 6RT3 or

Honeywell 8RT3) Discharge Air Sensor

Each unit ordered with variable air volume controls (digit

9 in the model number) is shipped with a Honeywell 6RT3

or 8RT3 discharge air sensor.

Install sensor in a turbulent free area of discharge air duct

where it will provide accurate supply air sensing. See

Figure 45, p. 62 for installation and sensor dimensions.

The sensor serves two functions:

1. Sends supply air temperature data to Discharge Air

Controller as an analog input, to control the

economizer (if applicable) and cycling of compressors.

2. Low limit sensor for system when supply air

temperature reaches too high a delta T between actual

supply air temperature and supply air temperature

setpoint.

Before installing any connecting wiring, see Figure 5, p. 11

to Figure 18, p. 24 for electrical access locations. Wire

sensor per field connection diagram, numbers 2307-9122

(for 20-60) and 2307-9144 (for 80-120). Shielded cable

(Belden 8760 or equivalent) must be used when wiring

sensor to the terminal board inside unit control panel.

Connect shielded cable to appropriate terminals on

terminal board (7TB7), in control panel.

Ground shield (at unit only) using ground screw in

customer 24 volt connection area as shown in field

connection diagram.

Suction Line Thermostat

Each unit ordered with variable air volume controls (digit

9 in the model number) is shipped with a suction line

thermostat (6S63) that must be field installed.

Locate the thermostat close to the expansion valve bulb on

a slightly flattened portion of the suction line. The

thermostat must be securely fastened to the suction line

and a field provided thermoconductive grease must be

applied to the area to ensure good heat transfer.

Before installing any connecting wiring, see Figure 5, p. 11

to Figure 18, p. 24 for electrical access locations. Wire

suction line thermostat per field connection diagram,

numbers 2307-9122 (for 20-60) and 2307-9144 (for 80-120).

See Table 16, p. 53 (AC Conductors) for wiring

specifications.

Insulate the suction line, where the thermostat is

mounted, to isolate it from the surrounding air.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

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 45. Discharge air sensor assembly

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Installation

SS-SVX11H-EN 63

Night Setback

If night setback operation is desired, connect a set of

normally open contacts (field provided) to the appropriate

terminals on the terminal board (7TB7), in the unit’s

control panel. Remove the factory installed jumper at the

terminal board when making the final wiring termination.

Refer to the field connection diagram, numbers 2307-9122

(for 20-60) and 2307-9144 (for 80-120) for details.

EVP Chiller Control

Each unit ordered for EVP Chiller applications (digit 9 in the

model number), is shipped with the following controls:

• EVP Remote Panel w/ W7100G Controller

• Freezestat (6S12)

• Chiller Water Temperature Sensor (6RT2)

• Freezestat Bulb well

• Chilled Water Temperature Sensor Well

The installation of the freezestat bulb well, freezestat bulb,

and the chilled water temperature sensor was discussed in

the “Chilled Water Piping” section. Refer to that section for

their installation locations and dimensional data.

The chiller control (located in the remote panel) controls

the system operation by responding to the leaving water

temperature. The remote panel must be mounted indoors

and within 20 feet of the chiller. Figure 46, p. 63 illustrates

the remote panel dimensional data, the component

locations, the locations for the shipwith items, grounding

lugs, and the field connection terminal board 6TB9. Refer

to the field connection diagram illustrated in Figure 47,

p. 64 (20-60T) and Figure 48, p. 65 (80-120T) for the

interconnecting points between the remote panel and the

unit’s control panel.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Figure 46. EVP Chiller Remote Panel

Installation

64 SS-SVX11H-EN

Refer to wiring notes on Figure 40, p. 57.

Figure 47. Field connection diagram - RAUJ-C20-60 - EVP chiller applications

2307-9122

Installation

SS-SVX11H-EN 65

See wiring notes on Figure 42, p. 59..

A ground wire must be installed between the EVP remote

panel and the unit control panel.

W7100G Discharge Chilled Water Controller

The discharge chilled water controller (6U11) is shipped

from the factory with a combination wire/ resistor type

jumper installed across Terminals 6, 7, & 8. The resistive

portion of the jumper is across Terminals 7 & 8, which set

the number of operating stages, of the control. As shipped,

a 200 ohm resistive jumper is installed across Terminals 7

& 8 on the controller. The 200 ohm resistive jumper is

required for two (2) stage operation on 20 through 30 Ton

units. If the unit is a 20, 25, or 30 Ton unit, locate the bag

that is secured to the controller, and discard it.

Figure 48. Field connection diagram - RAUJ-C80-120 EVP chiller applications

2307-9144

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.

Installation

66 SS-SVX11H-EN

For 40 through 60 Ton units, requiring four (4) stages

of operation, a 402 ohm resistive jumper must be installed

across Terminals 7 & 8 on the controller. Remove the

combination wire/resistor jumper containing the 200 ohm

resistor from Terminals 6, 7, & 8. Locate the bag that is

secured to the controller, and install the 402 ohm

combination jumper across Terminals 6, 7, & 8 on the

controller. Refer to the remote panel illustration for the

terminal identification.

Note: The resistor portion of the combination jumper

must be installed across Terminals 7 & 8 on the

controller.

For 80-120 Ton units, requiring six (6) stages of

operation, a 604 ohm resistive jumper is needed across

Terminals 7 & 8 on the controller. This jumper is factory

installed.

The descriptions of the following input devices are to

acquaint the operator with their function as they interface

with the Honeywell W7100G controller.

Note: All wiring must comply with local and national

electrical codes (NEC).

Outside Air Thermostat

(5S57 Field Provided)

The setpoint for the outside air thermostat is based upon

the working ambient selected when the unit was ordered.

A Zero (“0”) in the 11th digit of the model number indicates

the system is designed for standard ambient operation of

40ºF and above. A One (“1”) in the 11th digit of the model

number indicates the system is designed for low ambient

operation of 0ºF and above. Therefore, select a thermostat

with the appropriate operating range based on the unit

specifications. See field connection diagram for the

specific connection points inside the remote panel.

Constant Volume Control

(Honeywell W973) — 20 - 60TUnits Only

The descriptions of the following basic input devices used

with the Honeywell W973 Master Energy Controller (MEC)

are to acquaint the operator with their function as they

interface with the controller. Refer to field connection

diagram, number 2307-9122, for the specific component

connections at the unit’s control panel.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Installation

SS-SVX11H-EN 67

Refer to wiring notes on Figure 40, p. 57.

Figure 49. Field connection diagram - RAUJ-20-60 constant volume control applications

2307-9122

Installation

68 SS-SVX11H-EN

Electronic Zone Thermostat (Honeywell

T7067)

Each unit ordered with constant volume controls (in the

model number) is shipped with a Honeywell T7067

electronic zone thermostat. A Honeywell switching

subbase (Q667) is also included. The switching subbase

allows the operator to select the “System Mode” of

operation, i.e., Cool, Heat, Auto, or Off and the “Fan Mode”

of operation, i.e., On or Auto.

Note: As long as the status of the system is in an occupied

mode, the supply fan will operate continuously.

The fan will only cycle in the “Auto” mode during

unoccupied periods.

The zone thermostat should be located in an area with

good air circulation to enhance zone temperature

averaging. Position the thermostat about 54" above the

floor in a frequently occupied area.

Do not mount the thermostat where its sensing element

may be affected by:

a. Drafts or “dead” spots behind doors or in corners;

b. Hot or cold air from ducts;

c. Radiant heat from the sun, or from appliances;

d. Concealed pipes and chimneys;

e. Vibrating surfaces; or

f. Unconditioned areas behind the thermostat (e.g.,

outside walls).

Mount the thermostat subbase on either a standard 2" X 4"

handy box, a comparable European outlet box, or on any

nonconductive flat surface. Refer to the illustration in

Figure 50, p. 68 for mounting details.

Note: Specific installation instructions are packaged with

each thermostat and subbase. For subbase and

thermostat terminal identification, refer to

Figure 51, p. 69.

Thermostat Checkout

Once the subbase is mounted, before connecting any

wiring, use an ohm meter and complete the continuity

checks listed in Table 20, p. 69.

Thermostat Wiring

Before installing any connecting wiring, refer to Figure 5,

p. 11 to Figure 18, p. 24 for the electrical access locations

provided on the unit. Wire the thermostat in accordance

with field connection diagram, numbers 2307-9122 (for 20-

60) and 2307-9144 (for 80-120).

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Figure 50. T7067 electronic zone thermostat & Q667 switching subbase

Installation

SS-SVX11H-EN 69

Discharge Air Sensor (Honeywell 6RT1)

A discharge air sensor ships with each unit when the

constant volume control option is ordered. The sensor

should be installed in a turbulent free area of the discharge

air duct at a location that will provide accurate supply air

sensing. Refer to the illustration in Figure 45, p. 62 for

installation and sensor dimensional information.

Wire the sensor in accordance with field connection

diagram, numbers 2307-9122 (for 20-60) and 2307-9144

(for 80-120). As shipped from the factory, a resistor (7R1)

is installed on terminal board 1TB8 terminals 5 & 6).

Remove this resistor when the sensor is installed.

Shielded cable (Belden 8760 or equivalent) must be used

when wiring the sensor to the terminal board inside the

unit’s control panel.

When the sensor is installed, it serves two functions;

1. It sends the supply air temperature to the master

energy controller (MEC), in the form of an analog input,

to assist in the rate at which the system changes the

space temperature. By offsetting the actual zone

thermostat setpoint, up or down, the MEC can closer

control the zone comfort level.

2. It serves as a low limit for the system when the supply

air temperature reaches too high a delta tee between

the actual supply air temperature and the zone

temperature to help prevent overshooting of the zone

thermostat setpoint.

Figure 51. Q667 switching subbase & T7067 thermostat terminal identification

Table 20. (Q667) switching subbase

Subbase Switch

Positions Check Continuity between

These Terminal Pairs

Circuit

should beFan System

ON N/A 9 (Subbase) & 10 (Subbase) Closed

AUTO OFF

9 (Subbase) & 10 (Subbase) Open

5 (Subbase) & 5 (T’stat) Open

4 (Subbase) & 4(T’Stat) Open

AUTO HEAT

9 (Subbase) & 10 (Subbase) Open

5 (Subbase) & 5 (T’stat) Closed

4 (Subbase) & 4(T’Stat) Open

AUTO AUTO

9 (Subbase) & 10 (Subbase) Closed

5 (Subbase) & 5 (T’stat) Closed

4 (Subbase) & 4(T’Stat) Closed

AUTO COOL

9 (Subbase) & 10 (Subbase) Closed

5 (Subbase) & 5 (T’stat) Open

4 (Subbase) & 4(T’Stat) Closed

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

70 SS-SVX11H-EN

System Pre-Start Procedures

Use the checklist provided below in conjunction with the

“General Unit Requirement” checklist” to ensure that the

unit is properly installed and ready for operation. Be sure

to complete all of the procedures described in this section

before starting the unit for the first time.

• Turn the field supplied disconnect switch, located

upstream of the unit, to the “Off” position.

Note: Verify that the 115 volt control switch (1S2) in

the unit control box is in the "Off" position.

• Turn the “System” selection switch (at the Remote

Panel) to the “Off” position and the “Fan” selection

switch (if applicable) to the “Auto” or “Off” position.

• Check all electrical connections for tightness and

“point of termination” accuracy.

• Verify that the condenser airflow will be unobstructed.

• Check the condenser fan blades. Ensure they rotate

freely within the fan orifices and are securely fastened

to the fan motor shaft.

• Disable the compressor (s) by unplugging the reset

relay for each circuit. Refer to the unit-wiring diagram

that shipped with the unit.

• Verify that all compressor service valves, discharge

service valves, and liquid line service valves are back

seated on each circuit.

Important: COMPRESSOR SERVICE VALVES MUST BE

FULLY OPENED BEFORE START-UP

(SUCTION, DISCHARGE, AND LIQUID

LINE).

Important: After liquid line service valves are fully

opened (back seated), close just 1/4 turn to

allow for fan pressure control (4S7, 4S8)

operation.

• Check the compressor oil levels. Oil levels must be

near or above the top of all compressor sight glasses.

• Pack Stock Units;

Two low pressure switches are installed at the factory.

However, only one is wired into the control circuit. This

is to facilitate an EVP chiller or air over evaporator

application. Before starting the system, verify that the

correct pressure switch is connected to the control

circuit. See Table 23, p. 91 for the pressure control

settings, and the unit wiring diagram that shipped with

the unit, for the appropriate connections.

• Check the condenser coils. They should be clean and

the fins should be straight. Straighten any bent coil fins

with an appropriate sized fin comb.

• Inspect the interior of the unit for tools and debris.

• Inspect the interior of the unit for tools and debris in

preparation for starting the unit and complete the

remainder of the “Pre-start” procedures before

starting the unit.

EVP Chiller Applications

1. Flush building piping.

2. Clean strainer. Make sure strainer blow down valve or

plug is in place.

3. Connect chiller. Make sure chiller 1/2”x14NPTE plug is

in place.

4. Close drain valve

5. Fill system with water.

6. Vent system piping at the highest points.

7. Inspect water piping for leaks and repair.

System Evacuation Procedures

Each refrigeration circuit for split system applications

must be evacuated before the unit can be started. Use a

rotary type vacuum pump capable of pulling a vacuum of

100 microns or less. Verify that the unit disconnect switch

and the system control circuit switches are “OFF”.

The oil in the vacuum pump should be changed each time

the pump is used with a high quality vacuum pump oil.

Before using any oil, check the oil container for

discoloration which usually indicates moisture in the oil

and/or water droplets. Moisture in the oil adds to what the

pump has to remove from the system, making the pump

inefficient.

When connecting the vacuum pump to a refrigeration

system, it is important to manifold the vacuum pump to

both the high and low side of the system (liquid line access

valve and suction line access valve). Follow pump

manufacturer’s directions for proper methods of using

vacuum pump.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

NOTICE:

Compressor Damage!

Do not allow liquid refrigerant to enter the suction line.

Excessive liquid accumulation in the suction lines could

result in compressor damage.

NOTICE:

Evaporator Damage!

If acidic commercial flushing solution is used, bypass

the EVP chiller to prevent damage to the heat

exchanger.

System Pre-Start Procedures

SS-SVX11H-EN 71

The lines used to connect pump to the system should be

copper and the largest diameter that can practically be

used. Using larger line sizes with minimum flow resistance

can significantly reduce evacuation time. Rubber or

synthetic hoses are not recommended for system

evacuation. They have moisture absorbing characteristics

which result in excessive rates of evaporation, causing

pressure rise during standing vacuum test. This makes it

impossible to determine if system has a leak, excessive

residual moisture, or a continual or high rate of pressure

increase due to hoses.

An electronic micron vacuum gauge should be installed in

the common line ahead of the vacuum pump shutoff valve,

as shown in Figure 52, p. 71. Close Valves B and C, and

open Valve A.

Start vacuum pump. After several minutes, the gauge

reading will indicate the maximum vacuum the pump is

capable of pulling. Rotary pumps should produce

vacuums of 100 microns or less.

Open Valves B and C. Evacuate the system to a pressure of

300 microns or less. As vacuum is being pulled on the

system, it may appear that no further vacuum is being

obtained, yet the pressure is high. To facilitate the

evacuation process, it is recommended that the vacuum

be “Broken”.

To break the vacuum, shutoff valves A, B, & C and connect

a refrigerant cylinder to the charging port on the manifold.

Purge the air from the hose. Raise the standing vacuum

pressure in the system to “zero” (0 psig) gauge pressure.

Repeat this process two or three times during evacuation.

Note: It is unlawful to release refrigerant into the

atmosphere. When service procedures require

working with refrigerants, the service technician

must comply with all Federal, State, and local laws.

Standing Vacuum Test

Once 300 microns or less is obtained, close Valve A and

leave valves B and C open. This will allow the vacuum

gauge to read the actual system pressure. Let the system

equalize for approximately 15 minutes. This is referred to

as a “standing vacuum test” where, time versus pressure

rise. The maximum allowable rise over a 15 minute period

is 200 microns. If the pressure rise is greater than 200

microns but levels off to a constant value, excessive

moisture is present. If the pressure steadily continues to

rise, a leak is indicated. Figure 53, p. 71 illustrates three

possible results of the “standing vacuum test”.

If a leak is encounter, repair the system and repeat the

evacuation process until the recommended vacuum is

obtained. Once the system has been evacuated, break the

vacuum with refrigerant, and complete the remaining

“Pre-Start Procedures” before starting the unit.

NOTICE:

Equipment Damage!

Do not, under any circumstances, use a megohm meter

or apply power to the windings of a compressor while

it is under a vacuum. Electrical shorting between motor

windings and/or housing can occur while in a vacuum,

causing motor burnout.

Figure 52. Typical vacuum pump hookup

Figure 53. Evacuation time vs. pressure rise

200

400

600

800

1000

1200

1400

1600

-10 0 10 20 30 40 50 60 70 80 90

TIME IN MINUTES

PRESSURE IN MICRON

S

Continuously increasing pressure

indicates the presence of leaks,

moisture or both.

State of equilibrium indicates the

true amount of moisture left in

the system. It indicates that no

leaks are present, but further

evacuation is required.

State of equilibrium indicates the

true amount of moisture left in

the system. It indicates that no

leaks are present and the

system is properly evacuated.

Initial evacuation pressure

System Pre-Start Procedures

72 SS-SVX11H-EN

Discharge Air Controller Checkout

(Honeywell W7100A)

Note: The following checkout procedure must be

performed in its entirety and in the sequence

given.

The W7100A (7U11) discharge air controller can be

checked out using a highly accurate digital volt-ohmmeter

and the W7100A accessory tool kit (Trane part # TOL-0101

or Honeywell part # 4074EDJ).

1. Turn all control switches to the “OFF” position to

deactivate the Evaporator Fan and the Mechanical

Cooling.

2. Turn the main power disconnect switch for the

evaporator fan and condensing unit “OFF”.

3. Disable the mechanical cooling by removing the field

installed evaporator fan auxiliary interlock wire from

terminal board 7TB5 terminal 3 inside the unit control

panel.

4. At the Discharge Air Controller, in the unit control

panel, remove the red dust cover from the test plug

socket at the bottom of the W7100A. Insert the “Test

Plug”, from the kit, into the test plug socket. The test

plug overrides most of the built-in time delays for

staging the compressors “On” and “Off”. Refer to the

illustration in Figure 54, p. 73 for terminal and control

dial identification.

5. Install a jumper across the P and P1 terminals (remote

setpoint input), and another jumper across terminals 6

and 7 (reset input) if reset is enabled.

6. Disconnect the wires from terminals T and T1

(discharge air sensor).

7. Remove the 3,400 ohm resistor (blue leads) from the

test kit and connect it across terminals T and T1 to

simulate a discharge air temperature of 60ºF.

8. Set the “Setpoint F” dial at 56ºF or below; then set the

“Control Band F” dial at 2 to minimize the control

response time.

9. At the Discharge Air controller, verify that the

controller ground wire is connected to the chassis

ground. Refer to the unit wiring diagram that shipped

on the unit.

Note: It is not necessary to set the “Reset F” dial since the

factory installed jumper across Terminals 6 and 7

disables this dial.

10. Turn the control circuit switch 1S2, in the unit control

panel, and the main power disconnect switch for the

condensing unit to the “ON” position.

After approximately 2 minutes (time required to drive the

economizer fully open), the LEDs on the W7100 should

begin to illuminate as the cooling outputs stage “On”.

11. At the Discharge Air Controller, use a digital voltmeter

to verify there is 24 volts AC across terminals TR & TR.

12. Set the “Setpoint F” dial at 64ºF; within 10 seconds, the

LEDs should turn “Off” as the cooling outputs stage

“Off”.

13. Immediately readjust the “Setpoint F” dial to 56°F; the

LEDs should begin to illuminate again as the cooling

outputs stage “On”.

If the unit includes the zone reset option, proceed to the

next step; if not, proceed to step 18.

14. Set the “Reset F” dial at 15°F and the “Setpoint F” dial

at 41ºF; then remove the jumper across terminals 6 & 7.

To simulate a call for maximum reset, install the 1780 ohm

resistor (red leads), from the test kit, across terminals 6

and 7. The cooling LEDs should remain lit.

15. Turn the “Setpoint F” dial to 49ºF; within 1 to 2 minutes,

the LEDs should turn “Off” as the cooling outputs stage

“Off”.

16. As soon as all of the cooling LEDs are “Off”, remove the

1780 ohm resistor from terminals 6 and 7 and re-install

the jumper across these terminals.

17. Adjust the “Setpoint F” dial to 56ºF; within 1 minute,

the LEDs should illuminate as the cooling outputs

stage “On”.

If the system includes an economizer, complete steps 18

through 23 to verify proper economizer control operation;

if not, proceed to step 24.

18. With all of the cooling LEDs “On”, measure the DC

voltage across terminals R (-) and W (+). The measured

voltage should be 1.7 VDC to 2.1 VDC.

19. Set the “Setpoint F” dial at 64ºF to drive the

economizer output to the minimum position.

Within 2 minutes, the LEDs should turn “Off” as the

cooling outputs stage “Off”.

In approximately 5 minutes; measure the voltage

across terminals R (-) & W (+). The measured voltage

should drop to approximately 0.2 VDC.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

WARNING

High Voltage is Present at Terminal Block

1TB1 or Unit Disconnect Switch 1S1!

To prevent injury or death form electrocution, it is the

responsibility of the technician to recognize this hazard

and use extreme care when performing service

procedures with the electrical power energized.

System Pre-Start Procedures

SS-SVX11H-EN 73

20. Turn the control circuit switch 1S2, in the unit control

panel, and the main power disconnect switch to the

“OFF” position.

21. Remove the wires from terminals R, B, W, & Y.

22. Measure the resistance across the following pairs of

terminals, and compare the actual resistance readings

with the values shown below.

W7100 Terminals R-to-W = 226 ohms

W7100 Terminals R-to-B = 432 ohms

W7100 Terminals R-to-Y = 226 ohms

23. Reconnect the economizer leads R, B, W, & Y to the

appropriate terminals on the controller.

24. Turn the control circuit switch 1S2, in the unit control

panel, and the main power disconnect switch to the

“OFF” position.

25. Remove the jumper, installed in step 5, from terminals

6 & 7.

26. Remove the 3,400 ohm resistor from terminals T & T1

and reconnect the discharge air sensor leads to

terminals T & T1.

27. Remove the “Test Plug” from the W7100 test socket

and reinstall the red dust cover.

28. Reconnect the field installed evaporator fan auxiliary

interlock wire to terminal board 7TB5 terminal 3.

29. Turn all control switches to the “On” position and

restore main power to the system.

Discharge Air Sensor Checkout (Honeywell

Sensor)

1. Verify that the main power disconnect switch and the

control circuit switch 1S2, in the unit control panel, is

“OFF”.

2. At the Discharge Air Controller, in the unit control

panel, disconnect the wire connected to Terminal T1.

Use a digital ohmmeter to measure the resistance

across Terminal T and the wire removed from Terminal

T1.

3. Use the conversion chart in Figure 55, p. 74 to convert

the measured resistance to an equivalent temperature.

4. Measure the actual temperature at the sensor location.

If the measured resistance in step 2 is not within ± 10.0

ohms of the actual temperature, the sensor is out of

range; replace it.

Note: Before condemning the sensor, verify that the

connecting cable resistance is not excessive. Refer

to the “Field Installed Control Wiring” section.

5. Make all necessary repairs and reconnect the duct

sensor lead to terminal T1 on the controller.

6. Restore power to the system and turn all control

switches to the “ON” position.

Economizer Actuator Checkout

(Used with “Zone” or “Discharge Air” Temp

Controller)

The following procedures should be used to verify that the

field provided economizer actuator(s) function properly.

These procedures are based on using a typical Honeywell

actuator. If another type actuator is used, refer to the

specific checkout procedures for that actuator.

1. Turn all control switches to the “Off” position to

deactivate the Evaporator Fan and the Mechanical

Cooling. Verify that the main power disconnect switch

Figure 54. W7100A discharge air controller

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing 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 cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

System Pre-Start Procedures

74 SS-SVX11H-EN

for the condensing unit and the control circuit switch

1S2, in the unit control panel, is “OFF”.

2. Verify that the field provided disconnect switch and/or

the control circuit switch for the economizer actuator(s)

is “OFF”.

3. At the actuator, disconnect the control wires connected

to Terminals W, R, B, and Y.

4. Install a jumper across the actuator terminals R-to-W-

to-B.

5. Close the field provided disconnect switch and/or the

control circuit switch for the economizer actuator(s). If

the economizer actuator is working properly, it should

drive to mid-position.

6. Open the field provided disconnect switch and/or the

control circuit switch for the economizer actuator(s)

and remove the jumpers installed in step 4.

7. Reconnect the control wires to the actuator terminals

W, R, B, and Y.

8. Restore power to the actuator circuit and turn all

control switches to the “ON” position and restore

power to the system.

EVP Chiller Control Checkout (Honeywell

W7100G)

Note: The following checkout procedure must be

performed in its entirety and in the sequence given.

The W7100G (6U11) chilled water controller can be checked

out using a highly accurate digital voltohmmeter, the

W7100 accessory tool kit (Trane part # TOL-0101 or

Honeywell part # 4074EDJ), and the Honeywell 4074EFV

resistor bag assembly.

1. Verify that the main power disconnect switch and the

control circuit switch 1S2, in the unit control panel, is

“OFF”.

2. At the unit control panel, unplug the reset relay 1K11

and 1K12, (1K12 used on 40 through 60 Ton units only).

Refer to the connection diagram that shipped with the

unit for the location of the relay(s).

3. At the Chilled Water controller (6U11) inside the remote

panel, disconnect the sensor (6RT2) leads form

Terminals T & T1.

4. Remove the 3,400 ohm resistor (blue leads) from the

test kit and connect it across Terminals T and T1 to

simulate a discharge air temperature of 60ºF.

5. Remove the factory-installed jumper (wire 209A) from

the “fast response” Terminals 9 & 10.

6. To simulate a call for maximum reset, remove the

jumper from Terminals 6 & 7 and install the 1780 ohm

resistor (red leads), from the test kit, across Terminals

6 and 7.

7. Install a jumper across the P1 and P2 Terminals

(remote setpoint input).

8. Remove the red dust cover from the test plug socket at

the bottom of the W7100G. Insert the “Test Plug”, from

the kit, into the test plug socket. The test plug overrides

most of the built-in time delays for staging the

compressors “On” and “Off”. Refer to the illustration in

Figure 56, p. 75 for terminal and control dial

identification.

9. Set the “Reset F” dial at 20ºF and the “Setpoint F” dial

at 10ºF

10. “Close” the main power disconnect switch and turn the

control circuit switch 1S2, in the unit control panel,

“ON”.

Figure 55. Discharge duct sensor 6RT2 & 6RT3

“temperature vs resistance” curve

3000

3200

3400

3600

3800

4000

4200

20 40 60 80 100 120 140 160 180 200 220

Temperature - OF (OC)

Resistance (Ohms)

(-6.7oC) (4.4oC) (15.6oC) (26.7oC) (37.8oC) (48.9oC) (60.0oC) (71.1oC) (82.2oC) (93.3oC) (104.4oC)

3483 ± 10 Ohms @

77O F (25O C)

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

System Pre-Start Procedures

SS-SVX11H-EN 75

11. At the Chilled Water Controller, use a digital voltmeter

to verify there is 24 volts AC across terminals TR & TR.

12. After approximately 15 seconds, the LEDs on the

W7100G should begin to illuminate as the cooling

outputs stage “On”.

13. Set the “Setpoint F” dial at 60ºF; within 15 seconds, the

LEDs should turn “Off” as the cooling outputs stage

“Off”.

14. Remove the 1780 ohm resistor from Terminals 6 & 7

and reinstall the wire jumper removed in step 6.

15. Set the “Setpoint F” dial at 50ºF; within 15 seconds, the

LEDs should turn “On” as the cooling outputs stage

“On”.

16. Turn the control circuit switch 1S2, in the unit control

panel, to the “OFF” position.

17. Remove the 3,400 ohm resistor from Terminals T & T1

and reconnect the chilled water temperature sensor

leads to Terminals T & T1.

18. Remove the “Test Plug” from the W7100G test socket

and reinstall the red dust cover.

19. Plug the reset relay(s) 1K11 and 1k12 (if applicable)

back into their receptacle.

20. Turn the control switch 1S2 to the “On” position to

restore power to the control system.

Chilled Water Sensor Checkout

(Honeywell Sensor)

1. Verify that the main power disconnect switch and the

control circuit switch 1S2, in the unit control panel, is

“OFF”.

2. At the temperature controller, disconnect the wire

connected to terminal T1. Use a digital ohmmeter to

measure the resistance across terminal T and the wire

removed from terminal T1.

3. Use the conversion chart in Figure 37 to convert the

measured resistance to an equivalent temperature.

4. Measure the actual temperature at the sensor location.

If the measured resistance in step 2 is not within ± 10.0

ohms of the actual temperature, the sensor is out of

range; replace it.

Note: Before condemning the sensor, verify that the

connecting cable resistance is not excessive. Refer

to the “Field Installed Control Wiring” section.

5. Make all necessary repairs and reconnect the duct

sensor lead to terminal T1 on the controller.

6. Turn all control switches to the “ON” position and

restore power to the system.

Master Energy Control Checkout

Available Only For 20 - 60 Ton Units

1. Open the system control switches 5S1 and 5S2 to

disable the Evaporator Fan and Heating system.

2. Verify that the main power disconnect switch and the

control circuit switch 1S2, in the unit control panel, is

“OFF”.

3. At the Master Energy Controller (7U11), in the unit

control panel, remove at least one wire from each of

the “Heat Relay” normally open contacts and one from

each of the “Cool Relay” normally open contacts.

WARNING

High Voltage is Present at Terminal Block

1TB1 or Unit Disconnect Switch 1S1!

To prevent injury or death form electrocution, it is the

responsibility of the technician to recognize this hazard

and use extreme care when performing service

procedures with the electrical power energized.

Figure 56. W7100G chilled water controller

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing 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 cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

System Pre-Start Procedures

76 SS-SVX11H-EN

Insulate the wires with tape to prevent shorting or

grounding during control checkout.

4. Close the main power disconnect switch and turn the

control circuit switch 1S2, in the unit control panel,

“ON”.

5. At the Master Energy Controller, use a digital voltmeter

to verify that there is 20 volts DC power between

terminals 1 (N) & 2 (+20). Refer to the illustration in

Figure 54, p. 73 for terminal identification.

Note: The wires that are still connected to one side of the

“Cool Relay” contacts, are active with 115 volts

applied. Ohming the contacts when only one wire

is connected will not cause any damage to the

ohmmeter. However, do not try to ohm any set of

contacts with wires connected to both terminals of

that contact.

6. To verify the “Heating” output relays are operating;

a. place a jumper between Terminals 2 (+20) & 5 (H).

b. place the ohmmeter leads across each set of

normally open “Heat Relay” contacts. The

ohmmeter should read “Resistance” which

indicates that the heating output relays have

“pulled in”.

7. To verify the “Cooling” output relays are operating;

a. Remove the jumper from Terminals 2 (+20) & 5 (H)

and reinstall it between Terminals 2 (+20) & 4 (C).

b. place the ohmmeter leads across each set of

normally open “Cool Relay” contacts. The

ohmmeter should read “Resistance” which

indicates that the cooling output relays have

“pulled in”.

8. With all of the “Cooling Output” relays pulled in (step

7), measure the DC voltage across Terminals R (-) and

W (+). The measured voltage should be approximately

1.7 to 2.1 VDC.

9. Remove the jumper installed between Terminals 2

(+20) & 4 (C).

10. Measure the voltage again across Terminals R (-) and

W (+). The measured voltage should now be

approximately 0.2 VDC.

11. Turn the control circuit switch 1S2, in the unit control

panel, to the “OFF” position.

12. Remove the wires from Terminals R, B, W, & Y.

13. Measure the resistance across the following pairs of

terminals and compare the actual resistance readings

with the values shown below:

(1) MEC Terminals R-to-W = 226 ohms

(2) MEC Terminals R-to-B = 432 ohms

(3) MEC Terminals R-to-Y = 226 ohms

14. Reconnect the economizer leads W, R, B and Y to the

appropriate terminals on the controller.

15. Turn switches 1S2, 5S1, & 5S2 to the “ON” position to

restore power to the control system.

Zone Thermostat Checkout (Honeywell

T7067)

Available Only For 20 - 60 Ton Units

1. Open the system control switches 5S1 and 5S2 to

disable the Evaporator Fan and Heating system.

2. Close the main power disconnect switch and turn

control circuit switch 1S2, in unit control panel, “ON”.

3. At the Zone Thermostat (6U37), use a digital voltmeter

to verify that there is 20 volts DC power between

thermostat Terminals 1 & 2. See illustration in

Figure 29, p. 41 for terminal identification. Refer to

Tabl e 21, p. 77 for the thermostat “voltage output”

ramps.

4. To check the “Cooling” output signal, place the

voltmeter leads between thermostat Terminals 1 & 4.

Refer to Figure 29, p. 41 and;

a. move the cooling (blue) setpoint lever from right to

left. As the cooling setpoint is lowered, the voltage

signal should increase and the “Cooling” LED

brighten.

b. move the cooling (blue) setpoint lever from left to

right. As the cooling setpoint rises, the voltage

signal should decrease and the “Cooling” LED dim.

5. To check the “Heating” output signal, place the

voltmeter leads between thermostat Terminals 1 & 5.

Refer to Figure 29, p. 41 and;

a. move the heating (red) setpoint lever from left to

right. As the heating setpoint rises, the voltage

signal should increase and the “Heating” LED

brighten.

b. move the heating (red) setpoint lever form right to

left. As the heating setpoint lowers, the voltage

signal should decrease and the “Heating” LED dim.

WARNING

High Voltage is Present at Terminal Block

1TB1 or Unit Disconnect Switch 1S1!

To prevent injury or death form electrocution, it is the

responsibility of the technician to recognize this hazard

and use extreme care when performing service

procedures with the electrical power energized.

WARNING

High Voltage is Present at Terminal Block

1TB1 or Unit Disconnect Switch 1S1!

To prevent injury or death form electrocution, it is the

responsibility of the technician to recognize this hazard

and use extreme care when performing service

procedures with the electrical power energized.

System Pre-Start Procedures

SS-SVX11H-EN 77

Discharge Air Sensor Checkout (Honeywell

6RT1)

Available Only For 20 - 60 Ton Units

1. Turn the control circuit switch 1S2, in the unit control

panel, to the “OFF” position.

2. At the Master Energy Controller, disconnect wire

connected to Terminal T1. Use a digital ohmmeter to

measure resistance between Terminal T and the wire

removed from Terminal T1.

3. Use chart in Figure 55, p. 74 to convert the measured

resistance to an equivalent temperature.

4. Measure the actual temperature at the sensor location.

If the measured resistance in step 2 is not within ± 10.0

ohms of the actual temperature, the 6RT1 is out of

range; replace it.

Note: Before condemning the sensor, verify that the

connecting cable resistance is not excessive. Refer

to the “Field Installed Control Wiring” section.

5. Make all necessary repairs and reconnect the duct

sensor lead to terminal T1 on the controller.

6. Turn switches 1S2, 5S1, & 5S2 to the “ON” position to

restore power to the control system.

\

Voltage Imbalance

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:

% Voltage Imbalance = 100 x [(AV - VD)/(AV)] where:

•AV (Average Voltage) = (Volt 1 + Volt 2 + Volt 3)/3

•V1, V2, V3 = Line Voltage Readings

•VD = Line Voltage reading that deviates the farthest

from the average voltage.

Example: If voltage readings of supply power measured

221, 230, and 227, average volts would be:

•(221 + 230 + 227)/3 = 226 Avg.

Table 21. Zone thermostat (6U37) “voltage output”

ramps

1U11

Function

Nominal Operating Points and

Throttling Ranges Measured

between

these 1U11

Terminals

Pull-In

Voltage1

(VDC)

Drop-Out

Voltage(a)

(VDC)

(a) "Pull-In" and "Drop-Out" values are ± 0.25 VDC

Throttling

Range

HEAT 1(a) 4.63 4.0 Terminal 5

(heating) &

Terminal 1

(common)

HEAT 2(a) 5.88 5.25

HEAT 3(a) 7.13 6.50

HEAT 4(a) 8.38 7.75

COOL 1 4.58 - 5.42 3.44 - 4.56

Terminal 4

(cooling) &

Terminal 1

(common)

COOL 2 5.43 - 6.34 4.69 - 5.81

COOL 3 6.63 - 7.63 5.90 - 7.10

COOL 4 7.84 - 8.92 7.11 - 8.39

Economizer 2.75 - 4.00

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Figure 57. 6RT1 discharge duct sensor “temperature vs

resistance” curve

Figure 58. W973 master energy controller (MEC)

1600

1800

2000

2200

2400

2600

2800

3000

3200

3400

3600

3800

4000

4200

4400

4600

4800

55 60 65 70 75 80 85 90 95 100 105

Temperature - Degree F (C)

Resistance (Ohms)

(16oC) (18oC) (21oC) (24oC) (27oC) (29oC) (32oC) (35oC)

3000 Ohms @

77O F (25O C)

System Pre-Start Procedures

78 SS-SVX11H-EN

•VD (reading farthest from average) = 221

The percentage of Imbalance equals:

•100 x[(226 - 221)/226)] = 2.2%

The 2.2% imbalance in this example exceeds the

maximum allowable imbalance of 2.0%. This much

imbalance between phases can equal as much as a 20%

current imbalance with a resulting increase in motor

winding temperatures that will decrease motor life. If the

voltage imbalance is over 2%, notify the proper agencies

to correct the voltage problem before operating this

equipment.

Electrical Phasing

Proper electrical phasing can be quickly determined and

corrected before starting unit by using an instrument such

as Associated Research Model 45 Phase Sequence

Indicator, following steps below

• Turn field supplied disconnect switch that provides

power to terminal block 1TB1 to “Off” position

• Verify that the 115 volt control switch (1S2) in the unit

control box is in the "Off" position.

• Connect the phase sequence indicator leads to the

terminal block or to 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

• Close the main power disconnect switch or circuit

protector switch that provides the supply power to the

condensing unit.

• Observe the ABC and CBA phase indicator lights on the

face of the sequencer. The ABC indicator light will glow

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.

• Restore the main electrical power and recheck the

phasing. If the phasing is correct.

• Open the main power disconnect switch or circuit

protection switch and remove the phase sequence

indicator.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

WARNING

High Voltage is Present at Terminal Block

1TB1 or Unit Disconnect Switch 1S1!

To prevent injury or death form electrocution, it is the

responsibility of the technician to recognize this hazard

and use extreme care when performing service

procedures with the electrical power energized.

SS-SVX11H-EN 79

Operating Principals

VAV W7100A Discharge Air Controller (7U11)

The discharge air controller used in Variable Air Volume

applications is a Honeywell W7100A. This microprocessor

controller is designed to maintain an average discharge air

(D/A) temperature by:

1. monitoring the discharge air temperature sensor; and

2. modulating economizer dampers and sequencing

stages of mechanical cooling “On” or “Off”, as

required.

The W7100A receives analog input from the discharge air

sensor mounted in the supply duct every 2 to 3 seconds by

pulsing DC current across the sensor, then “reading” the

voltage potential across this thermistor.

If the comparison between the setpoint and the actual

discharge air temperature indicates that cooling is

required, the W7100A attempts to satisfy the load by

modulating the economizer open (if applicable).

Economizer Cycle

The economizer is only allowed to function if the ambient

conditions are below the setpoint of the enthalpy switch.

If the ambient air conditions are above the enthalpy

setpoint, the W7100A will open the Fresh Air dampers to

the minimum setpoint position.

To take full advantage of the “free cooling” provided by

the economizer, the W7100A “resets” the discharge air

setpoint. The amount of “reset” between the actual

discharge air setpoint and the economizer control point is

equal to 1/2 of the W7100’s control band setpoint.

Example: With a typical control band setting of 6°F, the

amount of discharge air “reset” is 3ºF (1/2 of the control

band setpoint). Therefore, if the discharge air setpoint is

55°F, the economizer control point is 52°F (i.e., 55°F - 3°F).

A second economizer “algorithm” within the W7100A is

the response time of the controller. The greater the

amount of deviation between the discharge air

temperature and the economizer control point, i.e., as the

temperature strays further from the control point, the

response time becomes faster; and, as the discharge air

temperature approaches the control point, the response

time becomes slower.

When the discharge air temperature is within the

“Deadband” (± 1.5°F of the economizer control point); the

W7100A maintains the economizer’s present position.

When the economizer cannot handle the cooling

requirement or when the outdoor ambient conditions are

unsuitable for “economizing”, the W7100A activates the

unit’s mechanical cooling section.

Note: As long as ambient conditions are suitable for

economizing, the economizer works in conjunction

with the mechanical cooling operation.

The control algorithm used by the W7100A to add stages

of cooling is illustrated in Figure 59, p. 79. When the

discharge air temperature drifts above the setpoint,

“Region 1”, a stage of mechanical cooling is added based

on time and the amount of deviation from setpoint. If the

discharge air temperature remains above the setpoint, the

W7100A energizes additional stages of mechanical

cooling.

If the operating cooling stage is capable of satisfying the

cooling requirement, as the discharge air temperature falls

below the setpoint for a sufficient period of time, the

W7100A turns the stages of mechanical cooling “Off”,

“Region 3”.

The W7100A determines the length of the time before

stages of mechanical cooling are turned “On” and “Off”.

When the system is operating within the control band, the

delay is longest at setpoint, and decreases to a minimum

of 4 minutes when the discharge air temperature exceeds

the upper or lower limit of the control band. Refer to the

illustration in Figure 59.

Figure 59. W7100A staging sequence

Operating Principals

80 SS-SVX11H-EN

Chilled Water Temperature Controller (6U11)

The chilled water temperature controller used with EVP

chiller applications is a Honeywell W7100G. This

microprocessor controller is designed to maintain an

average leaving water temperature using an integrating

control band concept that matches the required operating

capacity to the chiller load. The integral action, unlike

“proportional only” type controllers, minimizes the

amount of offset from the control setpoint.

The control band setting is centered on the leaving water

setpoint. It is adjustable from 0ºF to 10ºF [0ºC to 6ºC] and

is used to stabilize system operation. The control

algorithm used by the W7100G to add stages of cooling is

illustrated in Figure 74. As the water temperature rises

above the upper control band limit, a stage of mechanical

cooling is added, provided the minimum “Off” time has

been satisfied (Point A). The minimum “fast response”

time and the time delay between staging for the W7100G

is set for 60 seconds.

If the water temperature remains above the upper control

band limit (Point B), the next available stage of cooling will

be energized when the minimum time delay between

stages has elapsed. As the water temperature decreases

below the lower control band, the last stage that was

turned “On” will be cycled “Off” (Point C) when the

minimum “On” time for that stage has elapsed. As the load

on the water increases due to cooling stages being cycled

“Off”, the controller will maintain its current position, i.e.,

no staging of cooling “On” or “Off”, as long as the

temperature remains inside the control band. When the

temperature increases above the upper control band limit

(Point D), mechanical cooling stages will be sequenced

“On” in the same manner as before. As a rule, any time the

water temperature is above the upper control band limit,

a stage of cooling will be “added” and anytime the water

temperature decreases below the lower control band limit,

a stage of cooling will be “Subtracted”

Thermostatic Expansion Valve

The reliability and performance of the refrigeration system

is heavily dependent upon proper expansion valve

adjustment. Therefore, the importance of maintaining the

proper superheat cannot be over emphasized. See

Table 22, p. 85 for proper superheat adjustment. Accurate

measurements of superheat will provide the following

information.

1. Effectiveness of expansion valve control of refrigerant

flow.

2. Efficiency of the evaporator coil.

3. Amount of protection compressor is receiving against

flooding or overheating.

The expected range for superheat is 14-18°F at full load

conditions. At part load, expect a properly adjusted

expansion valve to control to 8-12°F superheat. Systems

operating with lower superheat could cause serious

compressor damage due to refrigerant floodback.

The outdoor ambient temperature must be between 65ºF

and 105ºF and the relative humidity of the air entering the

evaporator must be above 40 percent. When the

temperatures are outside of these ranges, measuring the

operating pressures can be meaningless.

Figure 60. W7100G staging sequence

Operating Principals

SS-SVX11H-EN 81

Condenser Fans

Condenser fan cycling is accomplished through

interlocking fan contactors with a combination of

compressor contactors and pressure switches (4S7 &

4S8). When the low ambient damper option is applied,

ambient thermostats (1S36 & 1S37) are used to provide

additional fan cycling control. Figure 61 and Figure 62

illustrate the condenser fan locations with their respective

fan and relay designation.

When a cooling command has been initiated (first step),

the first compressor for circuit one is energized, an

auxiliary contactor on the compressor contactor is closed

energizing contactor 1K6 for fan 2B2 or 1K9 4B2 (80 - 120

Ton). When the liquid line pressure exceeds 255 psig the

fan pressure switch (4S7 & 4S8) will close and energize

contactor 1K5 (20 -60 Ton units) or 1K7 (80 - 120 Ton units).

When the next cooling step is added, an additional fan

contactor will be energized by the compressor contactor

on 25 - 120 Ton units.

Figure 61. Condenser fan locations: 20-60

Figure 62. Condenser fan locations: 80-120

Operating Principals

82 SS-SVX11H-EN

Low Ambient Dampers

Low Ambient Dampers are available as a factory installed

option or can be field-installed. Dampers are used to

extend the operation of these units from the standard

operational temperatures to a minimum of 0ºF without hot

gas bypass or 10ºF with hot gas bypass. (These values

apply when wind speed across the condenser coil is less

than 5 m.p.h.). If typical wind speeds are higher than 5

m.p.h., a wind screen around the unit may be required. By

restricting the airflow across the condenser coils,

saturated condensing temperatures can be maintained as

the ambient temperatures change.

The low ambient damper actuator controls damper

modulation for each refrigerant circuit in response to

saturated condensing temperature.

Compressor Crankcase Heaters

Each compressor is equipped with a crankcase heater and

is controlled by a 600 volt auxiliary switch on the

compressor contactor. The proper operation of the

crankcase heater is important to maintain an elevated

compressor oil temperature during the “Off” cycle to

prevent low oil viscosity and foaming during compressor

starts.

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.

When power has been “Off” for an extended period, allow

the crankcase heater to operate a minimum of 24 hours

before starting the unit.

Low Ambient Thermostats

In addition to the low ambient dampers on 25, 30, 50 & 60

Ton units, a low ambient thermostat is installed to further

restrict the airflow across the condenser by cycling the 2B3

condenser fan on 25 & 30 Ton units plus 2B6 on 50 & 60 Ton

units. The thermostat opens when the ambient

temperature reaches 30ºF and closes at approximately

33ºF.

Hot Gas Bypass Operation

The HGBP valve regulates evaporator pressure by

opening as suction pressure decreases, to maintain a

desired minimum evaporating pressure regardless of a

decrease in evaporator external loading.

When the evaporator (suction) pressure is above the

valve’s setpoint, it remains closed. As suction pressure

falls below the valve’s setpoint, the valve begins to open.

The valve will continue to open at a rate proportional to the

suction pressure drop, thus maintaining evaporator

pressure.

Hot gas bypass valves are adjustable and should be set to

begin opening at approximately 100 psig suction pressure

and reach the full open position at 98 psig for DX coil

applications.

SS-SVX11H-EN 83

Start-Up

Low Ambient Damper Adjustment

(Factory or Field Installed)

When a unit is ordered with the low ambient option (i.e.,

Digit 11 is a “1” in the model number), a damper is factory

installed over the lead condenser fan for each refrigeration

circuit. See Figure 61, p. 81 or Figure 62, p. 81 for damper

location illustrations for the appropriate unit.

For field installation, mount the dampers over the

condenser fans at the locations shown in Figure 61, p. 81

or Figure 62, p. 81 and connect the actuator, controller,

and sensor for each circuit. (Refer to the Installation

Instructions provided with each low ambient damper kit.)

The controller has a factory default setpoint of 80º F. This

setpoint can be adjusted by installing a field supplied

resistor on 2TB34 in the low ambient control panel located

in the back of the main control panel. (See the low ambient

wiring diagram that shipped with the unit or with the field

kit, for resistance values and installation location.)

Inspect the damper blades for proper alignment and

operation. Dampers should be in the closed position

during the “Off” cycle.

If adjustment is required:

1. Remove the sensor leads from the input terminals 6

and 7 for circuit #1 and/or 11 and 12 for circuit #2.

(Controller output signal will go to 0.0 VDC and the

damper will drive to the closed position.)

2. Loosen the actuator clamp.

3. Firmly hold the damper blades in the closed position

4. Retighten the actuator clamp.

To check damper operation, jumper between the sensor

input terminals 6 and 7 and/or 11 and 12 (if applicable).

Controller output signal will go to 10 VDC and damper will

drive to full open position.

EVP Chiller Applications

Start the chilled water circulating pump by closing the field

provided pump disconnect switch and turn the pump

control circuit switch 5S1 “On”.

Check the flow device to ensure it opens at minimum flow

and closes properly.

With water circulating through the system, check the EVP

chiller pressure drop and adjust the flow (if necessary).

Refer to the appropriate EVP chiller size in for the operating

pressure drop.

Freezestat Setting

At the remote panel, set the freezestat at a minimum of 5°F

above the chilled water freezing temperature.

“Air Over” Evaporator Application

Verifying Proper Supply Fan Rotation

1. Verify the main power disconnect switch is off.

2. Unplug 1K21 & 1K22 reset relays from sockets in the

unit main control box to prevent inadvertent

compressor starts.

3. Ensure that the “System” selection switch at the

remote panel is in the “Off” position and the “Fan”

selection switch for the appropriate controls

application is in the “Auto” position. (VAV units do not

utilize a “Fan” selection input.)

4. Turn the 115 volt control circuit switch 1S2 to the “On”

position.

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.

NOTICE:

Actuator Damage!

To prevent damage, do not depress actuator clutch

while actuator is energized.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing 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.

Start-Up

84 SS-SVX11H-EN

5. Turn the main power disconnect switch or circuit

protector switch for the unit to the “On” position.

6. Turn the field provided disconnect switch for the

supply fan to the “On” position and “bump” the field

supplied control circuit switch “On”, (i.e., “On” then

immediately “Off”).

7. If the fan does not start in applications where the fan

control circuit is energized via terminal 7TB5-1 in the

RAUJ 115V control circuit, the field power wiring to the

RAUJ unit could be improperly phased. Phase

protection module (1U3) located in the RAUJ control

box interrupts control circuit power when improperly

phased field power is detected.

8. While the fan is coasting down, check the rotation. If

the fan is rotating backwards, turn the field provided

disconnect switch for the air handler to the “Off”

position and interchange any two of the main power

wires at the fan motor starter or contactor.

9. After all adjustments have been made, restart the

supply fan and proceed through the following

procedures.

System Airflow Measurement

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.

With the supply fan rotating in the proper direction,

measure the amperage at the supply fan contactor. If the

amperage exceeds the motor nameplate value, the static

pressure is less than design and the airflow is too high. If

the amperage is below the motor nameplate value, static

pressure could be too high and CFM could be too low. To

determine the actual CFM (± 5%);

a. Measure the actual fan RPM

b. Calculate the Theoretical BHP

i. (Actual Motor Amps X Motor HP)/Motor

Nameplate Amps

c. Plot this data onto the appropriate Fan Performance

Curve or Performance Table that shipped with the

Air Handling equipment. Where the two points

intersect, read the CFM line.

Use this data to assist in calculating a new fan drive if the

CFM is not at design specifications.

An alternate method with less accuracy is to measure the

static pressure drop across the evaporator coil. This can be

accomplished by;

1. Drilling a small hole through the unit casing on each

side of the coil.

2. Measure the difference between the pressures at both

locations.

3. Plot this value onto the appropriate component

pressure drop curve that shipped with the Air Handling

equipment. Use the data to assist in calculating a new

fan drive if the CFM is not at design specifications.

4. Plug the holes after the proper CFM has been

established.

After all adjustments have been made, proceed through

the following procedures.

Preliminary Expansion Valve Adjustment

No bleed thermal expansion valves are set by

manufacturers to control between 12-14.4°F superheat

leaving the evaporator at nominal design conditions.

Thermal expansion valves with bleeds are set to their

highest superheat setting. Actual superheat depends on

many factors (valve vs. system relative sizing, operating

conditions, system load step, system charge, piping, and

condenser fan control). The thermal expansion valves

must be adjusted as part of the unit start-up procedure. Do

not adjust valves beyond manufacturer's available

nominal adjustment range.

WARNING

Rotating Components!

During installation, testing, servicing and

troubleshooting of this product it may be necessary to

work with live and exposed 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 could result in rotating components

cutting and slashing technician which could result in

death or serious injury.

NOTICE:

Coil Damage!

Coil damage can occur if care is not taken when drilling

holes in this area.

NOTICE:

Compressor Damage!

Increase thermal expansion valve superheat settings

before starting compressors to minimize compressor

operation with low oil viscosity. Failure to follow the

above could result in compressor failure or reduced

compressor life.

Start-Up

SS-SVX11H-EN 85

Information in Table 22, p. 85 is approximate and intended

to simplify field adjustment by presetting valves to

approximately 18°F superheat for DX evap coils and 15°F

superheat for EVP chillers. Actual operating superheat will

typically be less than 18°/15°F and varies depending on

many factors including those listed above. Superheat

gradient (superheat change per turn) is also approximate

and will not be constant throughout the valve adjustment

range. Check superheat after startup to confirm proper

control.

Tag or mark valve to keep a record of any field

adjustments.

Table 22. Thermal expansion valve manufacturer settings - no bleed(a)

Sporlan

Standard off the shelf nominal valve settings (90 PSIG air test setting)

Valve

Superheat,

°F

CW turns

available

CCW turns

available

Superheat

change per

turn

Field adjust

for 18°F (DX

evap coil)

Field adjust for

15°F (EVP only)

BBIZE-1-GA

12

4.5

4.5

2.4°F 2.5 CW —

BBIZE-1-1/2-GA

BBIZE-2-GA

BBIZE-3-GA

BBIZE-4-GA

BBIZE-5-GA

BBIZE-6-GA

BBIZE-8-GA

BBIZE-12.5-GA

BBIZE-15-GA

OZE-20-GA

3.4°F .25 CW .25 CWOZE-25-GA

OZE-35-GA

OZE-50-GA 7.5 1.8°F 3.25 CW 1.75 CW

OZE-60-GA

Emerson

Standard off the shelf nominal valve settings

Valve Nom Tons

Superheat,

°F

CW turns

available

CCW turns

available

Superheat

change per

turn

Field adjust for

18°F (DX evap

coil)

Field adjust

for 15°F (EVP

only)

C 1-1/2 to 7 13 6 6 4 1.25 CW

TF 12 to 20 5 5 2 2.5 CW 1.0 CW

Danfoss

Standard off the shelf nominal valve settings

Valve Body size SHT, °F

CW turns

available

CCW turns

available

Superheat

change per

turn

Field adjust for

18°F (DX evap

coil)

Field adjust

for 15°F (EVP

only)

TGEL 3.5 TR

TGE 10

14.4

4

3

4.5°F .75 CW —

TGEL 4.5 TR

TGEL 6.5 TR

TGEL 9 TR

TGEL 13 TR

TGEL 15 TR

TGE 20

7 3 1.25 CW .25 CW

TGEL 19 TR

TGEL 23 TR

TGEL 31 TR

TGE 40 4TGEL 35 TR

TGEL 46 TR

(a) Valve part numbers with “-ZGA” in place of “-GA”, may be used interchangeably. “ERZE-” part number valves are an acceptable alternate to “BBIZE”

valves.

Start-Up

86 SS-SVX11H-EN

Adding Preliminary Charge

1. Leak check must be completed and system evacuated.

2. Verify that oil levels are near or above the top of all

compressor sight glasses.

3. Insure field supplied unit disconnect is "OFF". Then

verify that the unit 1S2 115 volt control circuit switch is

"OFF" and that reset relays 1K21 & 1K22 have been

unplugged to prevent inadvertent compressor starts.

4. Turn field supplied unit disconnect "ON" to energize

crankcase heaters. Verify crankcase heaters are

operating.

5. Verify that discharge, suction, and liquid line service

valves are open. Liquid line service valve must be

closed 1/4" turn from full open to allow for fan pressure

switch operation.

6. If system is equipped with hot gas bypass, insure hot

gas bypass is closed and remains closed during

charging.

7. Refer to Ta b l e 24, p. 91 for the charge estimate for the

condensing unit circuit and piping at the appropriate

piping length.

8. At the liquid line angle valve add as much R-410A

LIQUID as possible up to, but not exceeding, that listed

in Ta b l e 24, p. 91. Depending on conditions, it could

not be possible to add more than 60% of the charge

listed in Ta b l e 24, p. 91. This will be adequate for

compressor startup. More charge will be added after

compressors are started. Use an accurate scale to

measure and record the preliminary amount of R-410A

added to each circuit.

9. Do not add refrigerant in the suction line at this time to

prevent excessive refrigerant in the low side prior to

compressor startup.

Compressor Start-Up (All Systems)

1. Review the proceeding "Adding Preliminary Charge"

section and confirm all steps were completed.

2. Initial compressor start-up is best done above 70°F

outdoor temperature with ample evaporator load (at

least 70°F return air and 350 CFM/Ton).

Table 25, p. 91 gives the minimum starting

temperatures for both "Standard" & "Low" Ambient

units.

Do not attempt to charge the system with the low

ambient dampers and/or hot gas bypass operating (if

applicable). Disable low ambient dampers in the

"Open" position (refer to the "Low Ambient Damper

Adjustment" section) and verify hot gas bypass is not

operating before proceeding.

3. On units with dual circuits, work on only one circuit at

a time. Refer to Ta b l e 26, p. 91 for the compressor

sequencing and Figure 64, p. 92 or Figure 65, p. 92 for

their location.

4. Compare the amount of preliminary charge added in

the proceeding section to the Ta b l e 24, p. 91 estimates

for condensing unit and piping only. Up to 20% more

charge than listed in Tab l e 24, p. 91 may be required to

fully charge the circuit, depending on the evaporator

design. Have adequate R-410A available to complete

charging as described in the following steps.

5. Attach a thermocouple type temperature sensor on the

liquid line close to the liquid line service valve. To

insure an accurate liquid temperature reading, clean

the line where the sensor is attached. After securing the

sensor to the line, insulate the sensor and line to isolate

it from the ambient air.

6. Attach a set of service gauges onto the suction and

discharge gauge ports.

7. Check the low side pressure. The low pressure cutout

(4S3, 4S4) opens below 58 Psig and closes above 78

Psig. If the low side pressure is less than 78 Psig,

refrigerant may need to be added to the suction line

before starting the compressor(s). Slowly meter into

the suction line only as much R410A as needed to make

the low pressure cutout from the VAPOR charging

connection. If possible, plan to use this entire

refrigerant bottle on the same unit in order to minimize

fractionalization. Use an accurate scale to measure and

record the amount of R-410A added.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

NOTICE:

Compressor Damage!

Do not allow liquid refrigerant to enter the suction line.

Excessive liquid accumulation in the suction line could

result in compressor bearing damage. Keep crankcase

heaters on whenever refrigerant is in the system. If

crankcase heaters have not been on with refrigerant in

the system, turn the crankcase heaters on for a

minimum of 24 hours before starting compressors.

Failure to follow the above could result in compressor

failure or reduced compressor life.

Start-Up

SS-SVX11H-EN 87

8. Switch the field supplied unit disconnect "OFF". Open

the unit control box and plug in the reset relay (1K21 or

1K22) for the circuit being started only.

9. This charging procedure is more accurate at higher

outdoor temperatures. If the outdoor temperature is

less than 80°F, temporarily disable the fan pressure

control switches (4S11, 4S12) or (4S7, 4S8) on 80 - 120

Ton units. To do this, refer to unit wiring diagrams and

disconnect the wires between the switches and the

terminal strip.

10. Then switch the RAUJ 115 volt (1S2) control circuit

switch "ON". Close the control box and then switch the

field supplied unit disconnect "ON". Unit power should

be off no longer than 30 minutes to prevent refrigerant

migration to compressor sumps. If power is off for

longer than 30 minutes, allow time for crankcase

heaters to drive refrigerant from compressor sumps

before starting compressors.

11. Verify that oil levels are near or above the top of all

compressor sight glasses.

12. Start the first step compressor only.

a. If the compressor and condenser fans do not start,

the field power wiring to the RAUJ unit could be

improperly phased. A main unit power phase

protection module (1U3) is located in the RAUJ

control box and interrupts control circuit power

when improperly phased field power is detected.

i. CSHD compressors (used in 20-60T units) are

not equipped with electronic modules and do

not have individual compressor phase

protection.

ii. CSHN compressors (used in 80-120T units) are

individually equipped with compressor

protection modules (381U1, 382U2, 383U3,

384U4, 385U5, 386U6) located in the compressor

junction boxes. These modules include phase,

voltage, overcurrent, and over temperature

protection. If CSHN compressors are started

with reversed phasing, the module output relay

will open in about 6 seconds. Module output

relays are wired in series with the unit 115 volt

control circuit reset relays (1K21, 1K22). When

any module output relay opens, the circuit reset

relay latches closed and circuit operation is

locked out. Note: Refer to the Service &

Maintenance section of this manual or COM-

SVN01A-EN for further discussion regarding

other potential compressor protection module

faults.

b. As soon as a compressor starts, verify correct

rotation. If a scroll compressor is allowed to run

backwards for even a very short period of time,

internal compressor damage could occur and

compressor life could be reduced. When rotating

backwards scroll compressors make a loud noise,

do not pump, draw about 1/2 expected amps, and

the low side shell gets hot. Immediately shut off a

compressor rotating backwards.

c. Check condenser fans for proper rotation. As

viewed from the top of the unit, the correct rotation

direction is clockwise. All Motors are Rotating

Backwards.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

NOTICE:

Compressor Damage!

Keep crankcase heaters on whenever refrigerant is in

the system. If crankcase heaters have not been on with

refrigerant in the system, turn the crankcase heaters on

for a minimum of 24 hours before starting

compressors. Failure to follow the above could result in

compressor failure or reduced compressor life.

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.

NOTICE:

Compressor Damage!

Improper power phasing will cause compressor to run

backwards. Compressor could be running backwards if

it is noisy, low side shell gets hot, suction pressure

does not drop within 5 seconds after startup, and

compressor only draws ½ expected amps. Stop the

compressor immediately and have a qualified

electrician or technician properly trained in 3 phase

power correct the wiring. Failure to do the above could

result in compressor damage.

Start-Up

88 SS-SVX11H-EN

i. Turn the field supplied disconnect switch or

circuit protector switch that provides power to

the condensing unit to the “Off” position. Lock

the disconnect switch in the open position while

working at the unit.

ii. Verify that field connected main power phase

sequence matches that specified on the unit

wiring diagrams. Rotation will be incorrect if any

two power wires are interchanged at the unit

terminal block 1TB1 or the optional factory

mounted non-fused disconnect switch (1S1) in

the unit control panel.

iii. Check the unit phase module (1U1) for correct

operation and unit wiring.

Note: Interchanging "Load" side power wires at

the contactors only affects the individual

fan rotation. Ensure that the voltage phase

sequence at the main terminal block 1TB1

is ABC as outlined in the "Electrical

Phasing" section.

Some Motors are Rotating Backwards

iv. Turn the field supplied disconnect switch or

circuit protector switch that provides power to

the condensing unit to the "Off" position. Lock

the disconnect switch in the open position while

working at the unit.

v. If the unit main power phase sequence is correct,

rotation of an individual motor will be

backwards if any two leads are interchanged

between the unit main power and the motor.

Verify that wiring from the unit main power to

the motor is per the unit wiring diagram. Refer to

the illustration in Figure 63 for the compressor

terminal/phase identification. Compressor

damage could occur if a compressor runs

backwards for a very short period of time.

d. Start the remaining circuit compressor(s). Verify

correct rotation. Incorrect rotation is noisy,

compressor draws about ½ expected amps, and the

low side shell gets hot. Immediately shut off any

compressors rotating backwards.

e. After allowing 10 minutes for circuit operation to

stabilize at full load, check the liquid temperature

and discharge pressure. Plot on Figure 63, p. 89.

Expect the operating point to be in the "Add charge"

portion of Figure 63, p. 89. The remainder of the

circuit charge will be added in the following steps.

WARNING

Rotating Components!

During installation, testing, servicing and

troubleshooting of this product it may be necessary to

work with live and exposed 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 could result in rotating components

cutting and slashing technician which 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 cannot be

inadvertently energized. Failure to disconnect power

before servicing 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 cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

WARNING

Rotating Components!

During installation, testing, servicing and

troubleshooting of this product it may be necessary to

work with live and exposed 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 could result in rotating components

cutting and slashing technician which could result in

death or serious injury.

Start-Up

SS-SVX11H-EN 89

f. Subtract the total charge already added from the

Table 24, p. 91 charge estimate for condensing unit

at the appropriate piping length. Add no more R-

410A than 1/2 of this difference at a time.

g. With all the circuit compressors operating, SLOWLY

meter R-410A into the suction line from the LIQUID

charging connection. Add no more than 1/2 of the

difference from step f. above. Then allow the unit to

run for 10 minutes, and plot the new operating point

on Figure 63. Use an accurate scale to measure and

record the amount of R-410A added.

h. Repeat step g., adding smaller increments of

refrigerant until circuit operation is approximately

on the appropriate line of Figure 63, p. 89. As the

charging line is approached, smaller increments of

refrigerant will move the operating point more.

i. This procedure results in less subcooling than

previous split system charging methods. Note that

using this charging method will at times result in

bubbles at sight glasses installed just upstream of

expansion valves; especially during lower ambient

operation, part load, and for systems with

evaporators located above condensing units. This

charging procedure will maximize the usable

operating envelope of the R-410A RAUJ units.

Important: Do not release refrigerant to the

atmosphere! If adding or removing

refrigerant is required, the service

technician must comply with all Federal,

State, and local laws. Refer to general

service bulletin MSCU-SB-1 (latest edition).

j. Record the total charge added to the circuit.

k. If applicable, repeat steps a. through j. on the 2nd

refrigeration circuit.

Figure 63. System charging chart (all units)

250

300

350

400

450

500

550

600

650

700

70 80 90 100 110 120 130 140 150

Discharge Pressure, psig

Liquid Line Temp at Outdoor Unit, F

Remove

Charge

Add Charge

150" lines

150" lines

Add Charge

50" lines

Add Charge

Add Charge

NOTICE:

Compressor Damage!

To prevent compressor liquid slugging, only add liquid

in the suction line when the compressor is running. Use

extreme caution to meter liquid refrigerant into the

suction line slowly. If liquid is added too rapidly,

compressor oil dilution and oil pumpout could occur.

Failure to follow the above could result in compressor

failure or reduced compressor life.

NOTICE:

Compressor Damage!

Do not overcharge system. Excessive refrigerant

charging of the RAUJ unit can cause compressor liquid

slugging at startup, and conditions where compressors

and/or condenser fans short cycle. Failure to do the

above could result in compressor failure and/or

reduced compressor life.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Start-Up

90 SS-SVX11H-EN

l. If in step 9. the fan pressure control switches were

disabled to allow for charging below 80°F outdoor

temperature, disconnect unit power and reconnect

the control wiring for these fans at this time. Follow

the procedures discussed earlier to confirm proper

rotation of these condenser fans.

13. After the unit has been operating for approximately 30

minutes at full load with all condenser fans running,

record the operating pressures. Operating pressures

should be within +/- 10 Psig of the appropriate pressure

curve in Figure 63, p. 89. Measure and record the

system subcooling and superheat as described in the

following sections.

Subcooling

The outdoor ambient temperature must be between 65ºF

and 105ºF and the relative humidity of the air entering the

evaporator must be above 40 percent. When the

temperatures are outside of these ranges, measuring the

operating pressures can be meaningless.

With the unit operating at “Full Circuit Capacity”,

acceptable subcooling ranges between 8ºF to 16ºF.

Measuring Subcooling

Note: System charging is done by using the charging

chart on fig. 38 page 76. Do not attempt to charge

the system based on subcooling.

•At the liquid line service valve, measure the liquid

line pressure. Using a Refrigerant 410A pressure/

temperature chart, convert the pressure reading

into the corresponding saturated temperature.

•Measure the actual liquid line temperature as close

to the liquid line service valve as possible. To ensure

an accurate reading, clean the line thoroughly

where the temperature sensor will be attached.

After securing the sensor to the line, insulate the

sensor and line to isolate it from the ambient air.

Note: Glass thermometers do not have sufficient contact

area to give an accurate reading.

•Determine the system subcooling by subtracting

the actual liquid line temperature from the

saturated liquid temperature.

Measuring Superheat

•Measure the suction pressure at the outlet of the

evaporator as close to the expansion valve bulb

location as possible.

•Measured the suction line temperature as close to

the expansion valve bulb, as possible.

•Using a Refrigerant/Temperature chart, convert the

pressure reading to a corresponding saturated

vapor temperature.

Note: On many Trane fan/coil units, an access valve is

provided close to the expansion valve bulb

location. This valve must be added on climate

changers and other evaporators.

•Subtract the saturated vapor temperature, from the

actual suction line temperature. The difference

between the two temperatures is known as

“superheat”.

14. Verify that the oil level in each compressor is correct.

As a minimum, oil must be visible in the sight glass.

15. Once the checks and adjustments for the operating

circuit has been completed, check and record the:

– ambient temperature;

– compressor oil level (each circuit);

– compressor suction and discharge pressures and

liquid line temperatures (each circuit);

– superheat and subcooling (each circuit);

Record this data on an “operator’s maintenance log”

shown in Table 28, p. 96. Repeat these procedures for

the second refrigeration circuit, if applicable.

16. Turn the 115-volt control circuit switch 1S2 to the “OFF”

position and open the field provided or optional factory

mounted disconnect switch.

17. After shutting the system off, check the compressor oil

appearance. Discoloration of the oil indicates that an

abnormal condition has occurred. If the oil is dark and

smells burnt, it has overheated because of:

compressor is operating at extremely high condensing

temperatures; high superheat; a compressor

mechanical failure; or, occurrence of a motor burnout.

If the oil is black and contains metal flakes, a

mechanical failure has occurred. This symptom is

often accompanied by a high compressor amperage

draw.

If a motor burnout is suspected, use an acid test kit to

check the condition of the oil. Test results will indicate

an acid level exceeding 0.05 mg KOH/g if a burnout

occurred.

Compressor Oil

RAUJ unit and replacement compressors ship fully

charged with POE oil from the factory. The scroll

compressor uses POE oil (OIL00079 for a quart container

or OIL00080 for a gallon container) without substitution.

The appropriate oil charge for a 7.5 Ton scroll compressor

is 6.3 pints. For 9 through 15 Ton light commercial scroll

compressors is 7 pints. For a 15 and 20 Ton large

commercial scroll compressors (80-120T units), use 14.2

pints.

NOTICE:

Compressor Damage!

POE oil absorbs atmospheric moisture quickly which

can lead to compressor damage. Always use the

smallest container size required for the job

requirements. Always leave the oil container tightly

sealed until time of use. Do not reuse oil that has been

opened.

Start-Up

SS-SVX11H-EN 91

Compressor Crankcase Heaters

7.5 thru 15 Ton CSHD compressors use one 90-watt heater

per compressor. 15 and 20 Ton CSHN compressors use

one 160-watt heater per compressor.

Table 23. Pressure control switch settings

Pressure Switch Make Break

Hi Pressure 550 psi 650 psi

Lo Pressure 78 psi 58 psi

Condenser Fan Cycling switch 444 psi 255 psi

EVP Lo Pressure 105 psi 82 psi

Table 24. Approximate charge per circuit for condensing

unit and lines only (does not include

evaporator)

Total Interconnecting Line Length

Capacity 50 100 150

20 19 25 32

25 25 37 50

30 25 38 50

40 25 37 50

50 25 38 50

60 24 36 48

80 49 69 88

100 52 73 94

120 55 76 98

Table 25. Minimum starting ambient temperature

Unit

Size

Minimum Starting Ambient(a)

(a) Minimum starting ambients in degrees F and is based on the unit op-

erating at minimum step of unloading and 5 mph wind across con-

denser.

Standard Units Low Ambient Units

With

HGBP

No

HGBP

With

HGBP

No

HGBP

20-60 45° 40° 10° 0°

80-120 45° 40° 10° 0°

Table 26. Compressor sequence: 20-120 Ton units

Unit

Size

Control

Step Circuit 1 Circuit 2 % Loaded Unit

20 1

2

1A

1A,1B

50

100

25 1

2

1A

1A,1B

42

100

30 1

2

1A

1A,1B

50

100

40

1

2

3

4

1A

1A

1A,1B

1A,1B

2A

2A

2A,2B

25

50

75

100

50

1

2

3

4

1A

1A

1A,1B

1A,1B

2A

2A

2A,2B

23

46

73

100

60

1

2

3

4

1A

1A

1A,1B

1A,1B

2A

2A

2A,2B

25

50

75

100

80

1

2

3

4

5

6

1A

1A

1A,1B

1A,1B

1A,1B,1C

1A,1B,1C

2A

2A

2A,2B

2A,2B

2A,2B,2C

17

33

50

66

83

100

100

1

2

3

4

5

6

1A

1A

1A,1B

1A,1B

1A,1B,1C

1A,1B,1C

2A

2A

2A,2B

2A,2B

2A,2B,2C

15

30

45

60

80

100

120

1

2

3

4

5

6

1A

1A

1A,1B

1A,1B

1A,1B,1C

1A,1B,1C

2A

2A

2A,2B

2A,2B

2A,2B,2C

17

33

50

66

83

100

Table 26. Compressor sequence: 20-120 Ton units

Unit

Size

Control

Step Circuit 1 Circuit 2 % Loaded Unit

Start-Up

92 SS-SVX11H-EN

Pressure Curves

To Check Operating Pressures

1. Start the unit and allow the pressures to stabilize.

2. Measure the outdoor air dry bulb temperature (F)

entering the condenser coil.

3. Measure the discharge and suction pressure (psig)

next to the compressor.

4. Plot the outdoor dry bulb temperature and the

operating suction pressure (psig) onto the chart.

5. At point of intersection, read to the left for discharge

pressure. Measured discharge pressure should be

within +/- 10 psig of graph.

.

Figure 64. Typical compressor locations 20 - 60 Ton units

“2B” “2B” “2A”

“2A”

“1A” “1A”

“1A”

“1A” “1B” “1B”

“1B”

“1B”

Figure 65. Typical compressor locations 80 - 120T units

Figure 66. 20 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

20T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

Start-Up

SS-SVX11H-EN 93

Figure 67. 25 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

Figure 68. 30 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

25T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

30T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

Figure 69. 40 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

Figure 70. 50 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

40T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

50T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

Start-Up

94 SS-SVX11H-EN

Figure 71. 60 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

Figure 72. 80 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

60T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

80T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

Figure 73. 100 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

Figure 74. 120 Ton cooling cycle pressure curve(a)

(a) All compressors and condenser fans running

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

100T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

65F OD

75F OD

85F OD

95F OD

105F OD

250

300

350

400

450

500

550

95 105 115 125 135 145

Discharge pressure, PSIG

120T Cooling Cycle Pressure Curve

All compressors and condenser fans running

Sucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIGSucon pressure, PSIG

Start-Up

SS-SVX11H-EN 95

Final System Setup

After completing the Pre-start and Start-up procedures

outlined in the previous sections, perform these final

checks before leaving the unit:

Figure 75. Junction box: 20-60 Ton units

Figure 76. Junction box: 80-120 Ton units

CRANKCASE HEATER

WIRES

3B1HR12

CONTROL BOX

CONNECTION WIRES

T1

RED

T3

T2

BLUE

DLT WIRE 4S76

DLT WIRE 4S76

CONTROL BOX

CONNECTION WIRE

CONTROL BOX

CONNECTION WIRE

POWER WIRES FROM

CONTROL BOX

HPC WIRES 4S1

BLK

CONTROL BOX

CONNECTION WIRES

1B J-BOX SHOWN W/O COVER

POWER WIRES FROM

CONTROL BOX

CONTROL BOX

CONNECTION WIRES

CRANKCASE HEATER

WIRES

3B2HR13

T1

RED

T3

T2

BLUE

LPC WIRES 4S3

BLU

CONTROL BOX

CONNECTION

WIRES

COMPR PROTECTION

SWITCH WIRES

4S5

YEL

CONNECTION

WIRES

SEE DETAIL E

CONTROL BOX

CONNECTION WIRES

CRANKCASE HEATER

WIRES

3B1HR12 / 3B4HR15

DLT WIRE

4S76 / 4S77

CONTROL BOX

CONNECTION WIRE

CONTROL BOX

CONNECTION WIRE

POWER WIRES FROM

CONTROL BOX

T1

RED

T3

T2

BLUE

SCALE 0.500

HPC WIRES

4S1 / 4S2

BLK

CONTROL BOX

CONNECTION WIRES

LPC WIRES

4S3 / 4S4

BLU

COMPR PROTECTION

SWITCH WIRES

4S5 / 4S6

YEL

CONTROL BOX

CONNECTION WIRES

DETAIL E

LNS1 S2 M1 M2

L1

L3

L2

SEE DETAIL E

POWER WIRES FROM

CONTROL BOX

CONTROL BOX

CONNECTION WIRES

CRANKCASE HEATER

WIRES

3B2HR13 / 3B3HR14

3B5HR16 / 3B6HR17

T1

RED

T3

T2

BLUE

Start-Up

96 SS-SVX11H-EN

• Turn the 115 volt control circuit switch 1S2 “Off” and

program the Night Setback (NSB) panel (if applicable)

for proper unoccupied operation. Refer to the

programming instructions for the specific panel.

• Verify “System” selection switch and the “Fan Mode”

selection switch at the Remote panel is set correctly.

• Verify that the “System” control switch for the supply

fan is “On”.

• Verify that the “System” control switch for the supply

fan or the chilled water pump is “On.”

• Set the correct “Operating Temperature” for the

system at the system controller. Refer to Ta b l e 25, p. 91

for the recommended control set points for the

appropriate control option.

• Turn the 115 volt control circuit switch 1S2 “On”. The

system will start automatically once a request for

cooling has been given.

• Verify that all exterior panels and the control panel

doors are secured in place.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

Table 27. Recommended operating setpoints 20 - 120 Ton units

Control Control Setting Recommended Setting

Discharge Air Controller (VAV

units only)

Supply Air Setpoint Set at design discharge (supply) air temperature; minimum setting = 55° F

Reset Setpoint Set at maximum amount of allowable reset for supply air setpoint.

Control Band Set at 6° F Minimum Setpoint

Chiller Control (EVP units only)

Freezestat

Leaving Fluid Setpoint Set at design leaving chilled water temperature (typically) 44° F

Reset Setpoint Set at maximum amount of allowable reset for leaving fluid setpoint.

Control Band Set at 6° F Minimum Setpoint (minimum control temperature cannot be lower

than freezestat setting)

Freezestat Low Limit Solution Temperature Set at 5° F Minimum above the Chilled Solution Freeze Temperature

Zone Thermostat (CV units only) Zone Setpoint Set at desired space temperature.

Note: "No Controls" Units See System Engineer

Table 28. Sample maintenance log

Date

Current

Ambient

Temp.

(°F)

Refrigerant Circuit #1 Refrigerant Circuit #2

Compr

Oil

level

Suct.

Press.

(Psig)

Disch.

Press.

(Psig)

Liquid

Press.

(Psig)

Liq

Line

Temp

(°F)

Super-

heat

(°F)

Sub-

cool

(°F)

Compr

Oil

level

Suct.

Press.

(Psig)

Disch.

Press.

(Psig)

Liquid

Press.

(Psig)

Liq

Line

Temp

(°F)

Super-

heat

(°F)

Sub-

cool

(°F)

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

- ok

- Low

ok

- Low

Note: Check and record the data requested above each month during the cooling season with the unit running

SS-SVX11H-EN 97

Maintenance

Compressor Operational Sounds

The following discussion describes some of the

operational sounds of Trane R-410A scroll compressors.

These sounds do not affect the operation or reliability of

the compressor.

At Shutdown:

When a Scroll compressor shuts down, the gas within the

scroll expands and causes momentary reverse rotation

until the discharge check valve closes. This results in a

“flutter” type sound.

At Low Ambient Start-Up:

When the compressor starts up under low ambient

conditions, the initial flow rate of the compressor is low

due to the low condensing pressure. This causes a low

differential across the thermal expansion valve that limits

its capacity. Under these conditions, it is not unusual to

hear the compressor rattle until the suction pressure

climbs and the flow rate increases.

Scroll Compressor Failure Diagnosis and

Replacement

The RAUJ product does not have microelectronics that

provide compressor failure diagnostic capability at the

unit level. CSHN compressors (used in 80-120T RAUJ

units) do include a module in each compressor junction

box that recognizes certain fault conditions. Refer to Unit

Description section of this manual for protection features

included with RAUJ units. For more detailed information

regarding compressor failure diagnosis and replacement

of scroll compressors, refer to COM-SVN01A-EN.

Table 35 lists the specific compressor electrical and the

circuit breaker trip information. A tripped circuit breaker

does not necessarily mean a compressor has failed, but if

the circuit breaker has not tripped the compressor is

probably good. Verify first that simpler problems don't

exist including: low pressure, high pressure, discharge

temperature, or power supply phasing and voltage issues.

Refrigerant Evacuation and Charging

The compressor manifold system was designed to provide

proper oil return to each compressor. The refrigerant

manifold must not be modified in any way. Should a

compressor replacement become necessary and a suction

line filter drier is to be installed, install it at least the

minimum distance upstream of the suction manifold Tee

as shown in Figure 81, p. 100 and Figure 82, p. 100. Refer

to SS-APG012-EN for recommended suction filter

selections.

WARNING

R-410A Refrigerant under Higher Pressure

than R-22!

The units described in this manual use R-410A

refrigerant which operates at higher pressures than R-

22 refrigerant. Use ONLY R-410A rated service

equipment or components with these units. For specific

handling concerns with R-410A, please contact your

local Trane representative.

Failure to use R-410A rated service equipment or

components could result in equipment exploding under

R-410A high pressures which could result in death,

serious injury, or equipment damage.

WARNING

Refrigerant under High Pressure!

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 recover

refrigerant to relieve pressure or the use of non-

approved refrigerants, refrigerant substitutes, or

refrigerant additives could result in an explosion which

could result in death or serious injury or equipment

damage.

NOTICE:

Compressor Damage!

Do not alter compressor manifold piping. Altering the

manifold piping could cause oil return problems and

compressor failure.

NOTICE:

Compressor Damage!

If it becomes necessary to remove or recharge the

system with refrigerant, it is important that the

following actions are taken. Failure to do so could cause

permanent damage to the compressor.

• To prevent cross contamination of refrigerants and

oils, use only dedicated R410A service equipment.

• Disconnect unit power before evacuation and do not

apply voltage to compressor while under vacuum.

• Due to presence of POE oil, minimize system open

time. Do not exceed 1 hour.

• When recharging R-410A refrigerant, follow

procedures outlined in the Start-Up section of this

IOM.

• Allow the crankcase heater to operate a minimum of

24 hours before starting the unit.

Failure to follow these instructions could result in

compressor failure.

Maintenance

98 SS-SVX11H-EN

Important: Do not spill compressor oil. Refrigerant oil

is detrimental to some roofing materials.

Care must be taken to protect the roof from

oil leaks or spills.

Important: Do not release refrigerant to the

atmosphere! If adding or removing

refrigerant is required, the service

technician must comply with all federal,

state, and local laws.

Compressor Start-up

Discoloration of the oil indicates that an abnormal

condition has occurred. If the oil is dark and smells burnt,

it has overheated because of: compressor operating at

extremely high condensing temperatures; high superheat;

a compressor mechanical failure; or, occurrence of a motor

burnout.

If a motor burnout is suspected, use an acid test kit

(KIT15496) to check the condition of the oil. Test results will

indicate an acid level has exceeded the limit if a burnout

occurred. Oil test kits must be used for POE oil (OIL00079

for a quart container or OIL00080 for a gallon container) to

determine whether the oil is acidic. If a motor burnout has

occurred, change the oil in all compressors in a tandem or

trio set.

CSHD Compressors (20-60T)

For CSHD compressors this will require that the oil be

removed using a suction or pump device through the oil

equalizer Rotolock fitting, see Figure 77. Use a dedicated

device for removing oil. It is good practice to flush the

suction device with clean oil prior to use. Place a catch pan

under the oil equalizer Rotolock connection fitting on the

compressor to catch the oil that will come out of the

compressor when the oil equalizer tube is removed from

the compressor.

Prior to reinstalling the oil equalizer line to each

compressor, replace the Teflon gasket on the oil equalizer

Rotolock fitting on each compressor. See Figure 78. Torque

Rotolock nut to the values listed in Table 30, p. 99

Charge the new oil into the Schrader valve on the shell of

the compressor. Due to the moisture absorption

properties of POE oil, do not use POE oil from a previously

opened container. Also discard any excess oil from the

container that is not used.

CSHN Compressors (80-120T)

CSHN compressors have an oil drain valve, See Figure 79,

which allows the oil to be drained out of the compressor.

After the refrigerant has been recovered, pressurize the

system with nitrogen to help remove the oil from the

compressor. .

Charge the new oil into the Schrader valve or oil drain

valve on the shell of the compressor. Due to the moisture

absorption properties of POE oil, do not use POE oil from

a previously opened container. Also discard any excess oil

from the container that is not used.

Figure 77. CSHD

Figure 78. Teflon gasket

Figure 79. CSHN

Oil equalizer Rotolock

connection tting

¼ Schrader port

Oil drain valve

Maintenance

SS-SVX11H-EN 99

Note: Always replace gasket when reassembling oil

equalizer lines.

Electrical Phasing: It is very important to review and

follow the Electrical Phasing procedure described in the

startup procedure of this IOM.

If the compressors are allowed to run backward for even a

very short period of time, internal compressor damage

could occur and compressor life could be reduced.

If a scroll compressor is rotating backwards, it will not

pump, make a loud rattling sound, low side shell gets hot,

and draw ½ expected amps. Immediately shut off the unit.

Ensure that unit phasing is correct. If the incorrect phasing

is determined to be at one compressor, interchange any

two compressor leads to correct the motor phasing.

Precision Suction Restrictor: RAUJ tandems with

unequal compressors and all RAUJ trios use precision

suction restrictors to balance the oil levels in the

compressors. For manifolded compressors in RA units,

this restrictor is placed in the compressor indicated in

Table 31, p. 99. When replacing this compressor, it is

imperative that the proper restrictor is selected from those

provided with the replacement compressor.

When the compressors are restarted verify that correct oil

levels are obtained when all compressors are running in a

manifold set.

Table 29. Oil charge per compressor

Compressor Pints

CSHD 110 thru 183 7.0

CSHN 176 thru 250 14.2

Table 30. Torque requirements for rotolock fittings

CSHD* 64 +/- 12 ft-lbs

CSHN* 100 +/- 10 ft-lbs

Figure 80. Precision suction restrictor

Table 31. Suction restrictor location

25 Ton 1A CSHD125

50 Ton 1A, 2A CSHD142

80 Ton 1C, 2C CSHN176

100 Ton 1A, 1B, 2A, 2B CSHN184

120 Ton 1C, 2C CSHN250

Table 32. 20-60 Ton unit compressor circuit breakers

(200-230 volts)

1A/ 2A 1B / 2B 1A/ 2A 1B / 2B

Unit Voltage Must Hold Must Trip

20 Ton 200

230

50.4

43.2

50.4

43.2

58

49.7

58

49.7

25 Ton 200

230

50.4

43.2

63.1

57.1

58

49.7

72.5

65.7

30 Ton 200

230

69.3

59.4

69.3

59.4

79.7

68.3

79.7

68.3

40 Ton 200

230

50.4

43.2

50.4

43.2

58

49.7

58

49.7

50 Ton 200

230

57.1

51.4

63.1

57.1

65.7

59.2

72.5

65.7

60 Ton 200

230

69.3

59.4

69.3

59.4

79.7

68.3

79.7

68.3

Table 33. 80-120 Ton unit compressor circuit breakers (200-230 volts)

1A / 2A 1B / 2B 1C / 2C 1A / 2A 1B / 2B 1C / 2C

Unit Voltage Must Hold Must Trip

80 Ton 200

230

73.7

63.1

73.7

63.1

73.7

63.1

84.7

72.5

84.7

72.5

84.7

72.5

100 Ton 200

230

73.7

63.1

73.7

63.1

105.2

90.7

84.7

72.5

84.7

72.5

121

104.3

120 Ton 200

230

105

90.7

105.2

90.7

105.2

90.7

121

104.3

121

104.3

121

104.3

Maintenance

100 SS-SVX11H-EN

Table 34. 20-60 Ton unit compressor circuit breakers (460-575 volts)

1A/ 2A 1B / 2B

Unit Voltage Dial Setting

20 Ton 460

575

20.8

17.7

20.8

17.7

25 Ton 460

575

20.8

17.7

24.9

21.4

30 Ton 460

575

28.5

25.9

28.5

25.9

40 Ton 460

575

20.8

17.7

20.8

17.7

50 Ton 460

575

22.6

19.1

24.9

21.4

60 Ton 460

575

28.5

25.9

28.5

25.9

Table 35. 80-120 Ton unit compressor circuit breakers (460-575 volts)

1A / 2A 1B / 2B 1C / 2C

Unit Voltage Dial Setting

80 Ton 460

575

28.4

22.7

28.4

22.7

28.4

22.7

100 Ton 460

575

28.4

22.7

28.4

22.7

41.6

33.3

120 Ton 460

575

41.6

33.3

41.6

33.3

41.6

33.3

Figure 81. Suction line filter installation: 20-60 Ton units

16 “ min

Minimum 16" for CSHD straight

unobstructed piping between the

Suction Filter/Drier and the Tee

Figure 82. Suction line filter installation: 80-120 Ton units

25” min

Minimum 25” for CSHN straight

unobstructed piping between the

Suction Filter/Drier and the Tee

Maintenance

SS-SVX11H-EN 101

Fuse Replacement Data

Fall Restraint - Condenser Section Roof

This unit is built with fall restraint slots located on unit top

that must be used during servicing. See Figure 83 and

Figure 84.

Table 36. Fuse replacement selection

Fuse Description Unit Size Unit Voltage Fuse Type Fuse Size

Condenser Fan Fuse

(1F1-1F3 on 20 - 30 Ton)

(1F1-1F6 on 40 - 60 Ton)

20-60 Ton

200/230

460/575

380/415

Class RK5 25 Amp

15 Amp

Control CKT Fuse 1F7 20 - 30

40 - 60 All Class CC FNQ

R

3.2

6.25

Compressor Protector Fuse

1F8 20 - 60

1F9 40 - 60

20 -60 Ton All ABC - 6 6 Amp

Control Circuit Fuse 1F1 80 - 120 All Class CC FNQ-R 10 Amp

Compressor Protector Fuse 1F2 - 1F3 80 - 120 All ABC - 6 6 AMP

Condenser Fan Fuse

1F4-1F9 80

200 V

230 V

460 V

575 V

Class RK5

30 Amp

25 Amp

20 Amp

15 Amp

Condenser Fan Fuse

1F4-1F9 100 - 120

200 / 230 V

460 V

575 V

Class RK5

35 Amp

25 Amp

20 Amp

Transformer Fuse

1F12 - 1F13 All

200 V

230 V

460 V

FNQ-R

6 Amp

5 Amp

4 Amp

WARNING

Falling Off Equipment!

This unit is built with fall restraint slots located on unit

top that MUST be used during servicing. These slots are

to be used with fall restraint equipment that will not

allow an individual to reach the unit edge. However

such equipment will NOT prevent falling to the ground,

for they are NOT designed to withstand the force of a

falling individual. Failure to use fall restraint slots and

equipment could result in individual falling off the unit

which could result in death or serious injury.

Figure 83. Fall restraint slot location

20-30 Ton Sizes

40-120 Ton Sizes

Figure 84. Fall restraint slot location (inset)

Maintenance

102 SS-SVX11H-EN

Monthly Maintenance

Air Handling Equipment

Before completing the following checks, turn the system

control circuit switch 1S2 and 5S1 to the "Off" position.

Open the main power disconnect switch for the

Condensing Unit and Air Handling Unit and "lock it" in the

"Off" position before removing any access panels.

• Inspect the return air filters. Clean or replace them if

necessary.

• Check the evaporator drain pan and condensate piping

to ensure that there are no blockages.

• Inspect the evaporator coils for dirt. If the coils appear

dirty, clean them according to the instructions

described in the “Coil Cleaning” section.

• Inspect the economizer damper hinges and pins (if

applicable) to ensure that all moving parts are securely

mounted. Clean the blades as necessary.

• Verify that all damper linkages move freely; lubricate

with white grease, if necessary.

• Check Supply Fan motor bearings; repair or replace the

motor as necessary.

• Check the fan shaft bearings for wear. Replace the

bearings as necessary.

• Lubricate supply fan bearings. Contact equipment

manufacturer for recommended greases.

Important: Use a hand grease gun to lubricate

bearings. Add grease until a light bead

appears all around the seal.

Note: After greasing the bearings, check the setscrews to

ensure that the shaft is held securely to the

bearings and fan wheels. Make sure that all bearing

supports are tight.

• Check the supply fan belt(s). If the belts are frayed or

worn, replace them.

• Verify that all wire terminal connections are tight.

• Inspect unit for unusual conditions (e.g., loose access

panels, leaking piping connections, etc.)

• When checks are complete, verify all retaining screws

are reinstalled in unit access panels.

Condensing Unit

• Manually rotate the condenser fans to ensure free

movement and check motor bearings for wear. Verify

that all of the fan mounting hardware is tight.

• Verify that all wire terminal connections are tight.

• Inspect the condenser coils for dirt and foreign debris.

If the coils appear dirty, clean them according to the

instructions described in the “Coil Cleaning” section.

• Inspect the compressor and condenser fan motor

contactors. If the contacts appear severely burned or

pitted, replace the contactor. Do not clean the contacts.

• Check the compressor oil level. (Compressors "Off")

Coil Cleaning

Regular coil maintenance, including annual cleaning,

enhances unit’s operating efficiency by minimizing:

•compressor head pressure and amperage draw;

•water carryover;

•fan brake horsepower; and,

•static pressure losses.

At least once each year—or more often if the unit is located

in a “dirty” environment—clean the microchannel

condenser using the instructions outlined below. Be sure

to follow these instructions as closely as possible to avoid

damaging the coils.

To clean refrigerant coils, use a soft brush and a sprayer.

Note: DO NOT use any detergents with microchannel

condenser coils. Pressurized water or air ONLY.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote

disconnects before servicing. Follow proper lockout/

tagout procedures to ensure the power cannot be

inadvertently energized. Failure to disconnect power

before servicing could result in death or serious injury.

NOTICE:

Bearing Damage!

To prevent damage to fan bearings, do not over

lubricate. Over lubrication can be just as harmful as not

enough grease.

WARNING

Rotating Components!

The following procedure involves working with rotating

components. Disconnect all electric power, including

remote disconnects before servicing. Follow proper

lockout/tagout procedures to ensure the power cannot

be inadvertently energized. Failure to disconnect power

before servicing could result in rotating components

cutting and slashing technician which could result in

death or serious injury.

NOTICE:

Coil Cleaners!

Coil cleaners can damage roofs, surrounding buildings,

vehicles, etc. Cleaning substances should be checked to

ensure that they will not cause damage to

surroundings. Coils and roof (if applicable) should be

rinsed thoroughly. Do not spray coil cleaners in windy

conditions.

Maintenance

SS-SVX11H-EN 103

1. Remove enough panels from the unit to gain safe

access to coils..

Important: Bridging between the main supports

required before attempting to enter into the

unit. Bridging may consist of multiple 2 by

12 boards or sheet metal grating.

2. Straighten any bent coil fins with a fin comb.

3. For accessible areas, remove loose dirt and debris

from both sides of the coil. For dual row microchannel

condenser coil applications, seek pressure coil wand

extension through the local Trane Parts Center..

Note: DO NOT use any detergents with microchannel

coils. Pressurized water or air ONLY.

4. Pour the cleaning solution into the sprayer. If a high-

pressure sprayer is used:

a. The minimum nozzle spray angle is 15 degrees.

b. Do not allow sprayer pressure to exceed 600 psi.

c. Spray the solution perpendicular (at 90 degrees) to

the coil face.

5. Spray the leaving-airflow side of the coil first; then

spray the opposite side of the coil. For evaporator and

reheat coils, allow the cleaning solution to stand on the

coil for five minutes.

6. Rinse both sides of the coil with cool, clean water.

7. Inspect both sides of the coil; if it still appears to be

dirty, repeat Steps 6 and 7.

8. Reinstall all of the components and panels removed in

Step 1; then restore power to the unit.

9. For evaporator and reheat coils, use a fin comb to

straighten any coil fins which were inadvertently bent

during the cleaning process.

Microchannel Condenser Coil Repair and

Replacement

If microchannel condenser coil repair or replacement is

required, seek HVAC Knowledge Center information or

Service Guide document RT-SVB83*-EN for further details.

EVP Remote Evaporator Chiller

The brazed plate evaporator is difficult to clean should it

become plugged with debris so proper installation and

maintenance of the inlet water strainer is important.

Particles larger than 0.039” entering the heat exchanger

could block flow passages causing a failure. Indications of

a plugged BPHE evaporator include “wet” suction due to

lack of heat exchange, loss of superheat control,

depressed discharge superheat (superheat less than 63°F),

compressor oil dilution and/or starvation and premature

compressor failure.

Minimum water flow rate must be maintained to avoid

laminar flow, potential evaporator freezing, scaling and

poor temperature control.

Maximum water flow rate must not be exceeded to avoid

possible erosion.

Water Strainer Maintenance

To protect the evaporator and for maximum efficiency, the

strainer must be cleaned. A differential pressure gauge

installed across the inlet and outlet will indicate pressure

loss due to clogging and may be used as a guide to

determine when cleaning is required. Normally when

differential pressure reaches 5-10psi, the screen must be

cleaned. To clean, open and flush out until any sediment is

removed.

EVP Evaporator Replacement

If the evaporator requires replacement, it is very important

that the new evaporator be replaced correctly and with the

correct refrigerant and water piping connections. The

refrigerant inlet/liquid connection is at the bottom of the

evaporator and the refrigerant outlet/suction connection is

at the top of the evaporator and both are on the same side.

Pay particular attention to evaporators with dual circuits.

Avoid cross-circuiting when installing the new evaporator.

Proper brazing techniques for dissimilar materials must be

followed, see “Brazing Procedures” section.

Water Loop

If the water loop is drained for an extended period, pipe

sections between the strainer and the heat exchanger

should be cleaned or replaced, to prevent rust buildup

from entering the chiller.

WARNING

No Step Surface!

Do not walk on the sheet metal drain pan. Walking on

the drain pan could cause the supporting metal to

collapse, resulting in the operator/technician to fall.

Failure to follow this recommendation could result in

death or serious injury.

NOTICE:

Heat Exchanger Damage!

Do not stop water flow with the refrigeration system

running. Freezing and heat exchanger damage could

occur.

104 SS-SVX11H-EN

Warranty and Liability Clause

COMMERCIAL EQUIPMENT RATED 20 TONS AND LARGER AND RELATED ACCESSORIES

PRODUCTS COVERED

This warranty* is extended by Trane Inc. and applies only to commercial equipment rated 20 Tons and larger and related

accessories.

The Company warrants for a period of 12 months from initial start-up or 18 months from date of shipment, whichever is

less, that the Company products covered by this order (1) are free from defects in material and workmanship and (2) have

the capacities and ratings set forth in the Company’s catalogs and bulletins, provided that no warranty is made against

corrosion, erosion or deterioration. The Company’s obligations and liabilities under this warranty are limited to furnishing

f.o.b. factory or warehouse at Company designated shipping point, freight allowed to Buyer’s city (or port of export for

shipment outside the conterminous United States) replacement equipment (or at the option of the Company parts

therefore) for all Company products not conforming to this warranty and which have been returned to the manufacturer.

The Company shall not be obligated to pay for the cost of lost refrigerant. No liability whatever shall attach to the Company

until said products have been paid for and then said liability shall be limited to the purchase price of the equipment shown

to be defective.

The Company makes certain further warranty protection available on an optional extra-cost basis. Any further warranty

must be in writing, signed by an officer of the Company.

The warranty and liability set forth herein are in lieu of all other warranties and liabilities, whether in contract or in

negligence, express or implied, in law or in fact, including implied warranties of merchantability and fitness for particular

use. In no event shall the Company be liable for any incidental or consequential damages.

THE WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER WARRANTIES AND LIABILITIES,

WHETHER IN CONTRACT OR IN NEGLIGENCE, EXPRESS OR IMPLIED, IN LAW OR IN FACT, INCLUDING IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR USE, IN NO EVENT SHALL WARRANTOR BE

LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.

Manager - Product Service

Trane In c.

Clarksville, Tn 37040-1008

PW-215-2688

*Optional Extended Warranties are available for compressors and heat exchangers of Combination Gas-Electric Air

Conditioning Units.

SS-SVX11H-EN 105

Wiring Diagrams

Note: Published unit wiring diagrams (individual, separate diagrams for unitary product lines) are available via e-Library.

Drawing

Number Description

2307-4483 Unit Connection Wiring Split - System Condensing Unit Air Cooled RAUJ 20-60 Ton units

2307-4495 Connection-Adder Plates Split System Condensing Unit RAUJ 80-120 Ton units

2307-9116 Power Schematic - Split System Condensing Unit RAUJ 20-60 Ton units

2307-9208 Schematic w/No System Controls - Split System Condensing Unit RAUJ 20-60 Ton units

2307-9209 Schematic w/Constant Volume Controls - Split System Condensing Unit RAUJ 20-60 Ton units

2307-9210 Schematic w/Variable Air Volume Controls - Split System Condensing Unit RAUJ 20-60 Ton units

2307-9211 Schematic w/EVP Controls - Split System condensing Unit RAUJ 20-60 Ton units

2307-9212 Connection - Main Control Box & Raceway Devices - Split System Condensing Unit RAUJ 20-60 Ton units

2307-9122 Field Connection Diagram - Split System Condensing Unit RAUJ 20-60 Ton units

2307-9218 Power Schematic - Split System Condensing Unit RAUJ 80-120 Ton units

2307-9214 Schematic - Air Cooled Diagram - Split System Condensing Unit RAUJ 80-120 Ton units w/No Controls

2307-9215 Schematic - Air Cooled Diagram - Split System Condensing Unit RAUJ 80-120 Ton units w/Variable Air Volume Controls

2307-9216 Schematic - Air Cooled Diagram - Split System Condensing Unit RAUJ 80-120 Ton units w/EVP Controls

2307-9217 Connection - Air Cooled Control Box Diagram - Split System Condensing Unit RAUJ 80-120 Ton units

2307-9144 Field Connection Air Cooled Diagram - Split System Condensing Unit RAUJ 80-120 Ton units

2307-9219 Connection Raceway Diagram - Split System Condensing Unit RAUJ 80-120 Ton units

2307-3900 Connection - Low Ambient Damper Option 20-120 Ton units

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.

© 2012 Trane All rights reserved

SS-SVX11H-EN 30 Oct 2012

Supersedes SS-SVX11G-EN (05 Mar 2012)