Trane Odyssey 6 To 25 Tons Installation And Maintenance Manual Split System Air Conditioners

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SSAAFFEETTYY WWAARRNNIINNGG

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.

January 2014 SS-SVX12C-EN

Split System Air Conditioners

Odyssey™™

R-22 Dry Charge

Cooling Condenser — 7.5, 10, 15 and 20 Tons

((6600 HHzz))

TTA090A***G*

TTA120A***G*

TTA180B***G*

TTA240B***G*

Installation, Operation,

and Maintenance

©2014 Trane All rights reserved SS-SVX12C-EN

Introduction

Read this manual thoroughly before operating or

servicing this unit.

Warnings, Cautions, and Notices

Safety advisories appear throughout this manual as

required. Your personal safety and the proper

operation of this machine depend upon the strict

observance of these precautions.

The three types of advisories are defined as follows:

WARNING

Indicates a potentially hazardous situation

which, if not avoided, could result in death or

serious injury.

CAU

TION

Indicates a potentially hazardous situation

which, if not avoided, could result in minor or

moderate injury. It could also be used to alert

against unsafe practices.

NOTICE

Indicates a situation that could result in

equipment or property-damage only

accidents.

Important Environmental Concerns

Scientific research has shown that certain man-made

chemicals can affect the earth’s naturally occurring

stratospheric ozone layer when released to the

atmosphere. In particular, several of the identified

chemicals that may affect the ozone layer are

refrigerants that contain Chlorine, Fluorine and Carbon

(CFCs) and those containing Hydrogen, Chlorine,

Fluorine and Carbon (HCFCs). Not all refrigerants

containing these compounds have the same potential

impact to the environment. Trane advocates the

responsible handling of all refrigerants-including

industry replacements for CFCs such as HCFCs and

HFCs.

Important 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.

WWAARRNNIINNGG

PPrrooppeerr FFiieelldd WWiirriinngg aanndd GGrroouunnddiinngg

RReeqquuiirreedd!!

FFaaiilluurree ttoo ffoollllooww ccooddee ccoouulldd rreessuulltt iinn ddeeaatthh oorr

sseerriioouuss iinnjjuurryy..

AAllll ffiieelldd wwiirriinngg MMUUSSTT bbee ppeerrffoorrmmeedd bbyy qquuaalliiffiieedd

ppeerrssoonnnneell.. IImmpprrooppeerrllyy iinnssttaalllleedd aanndd ggrroouunnddeedd

ffiieelldd wwiirriinngg ppoosseess FFIIRREE aanndd EELLEECCTTRROOCCUUTTIIOONN

hhaazzaarrddss.. TToo aavvooiidd tthheessee hhaazzaarrddss,, yyoouu MMUUSSTT ffoollllooww

rreeqquuiirreemmeennttss ffoorr ffiieelldd wwiirriinngg iinnssttaallllaattiioonn aanndd

ggrroouunnddiinngg aass ddeessccrriibbeedd iinn NNEECC aanndd yyoouurr llooccaall//

ssttaattee eelleeccttrriiccaall ccooddeess..

WWAARRNNIINNGG

PPeerrssoonnaall PPrrootteeccttiivvee EEqquuiippmmeenntt ((PPPPEE))

RReeqquuiirreedd!!

FFaaiilluurree ttoo wweeaarr pprrooppeerr PPPPEE ffoorr tthhee jjoobb bbeeiinngg

uunnddeerrttaakkeenn ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy..

TTeecchhnniicciiaannss,, iinn oorrddeerr ttoo pprrootteecctt tthheemmsseellvveess ffrroomm

ppootteennttiiaall eelleeccttrriiccaall,, mmeecchhaanniiccaall,, aanndd cchheemmiiccaall

hhaazzaarrddss,, MMUUSSTT ffoollllooww pprreeccaauuttiioonnss iinn tthhiiss mmaannuuaall

aanndd oonn tthhee ttaaggss,, ssttiicckkeerrss,, aanndd llaabbeellss,, aass wweellll aass tthhee

iinnssttrruuccttiioonnss bbeellooww::

•• BBeeffoorree iinnssttaalllliinngg//sseerrvviicciinngg tthhiiss uunniitt,,

tteecchhnniicciiaannss MMUUSSTT ppuutt oonn aallll PPeerrssoonnaall

PPrrootteeccttiivvee EEqquuiippmmeenntt ((PPPPEE)) rreeccoommmmeennddeedd

ffoorr tthhee wwoorrkk bbeeiinngg uunnddeerrttaakkeenn.. AALLWWAAYYSS rreeffeerr

ttoo aapppprroopprriiaattee MMSSDDSS sshheeeettss aanndd OOSSHHAA

gguuiiddeelliinneess ffoorr pprrooppeerr PPPPEE..

•• WWhheenn wwoorrkkiinngg wwiitthh oorr aarroouunndd hhaazzaarrddoouuss

cchheemmiiccaallss,, AALLWWAAYYSS rreeffeerr ttoo tthhee aapppprroopprriiaattee

MMSSDDSS sshheeeettss aanndd OOSSHHAA gguuiiddeelliinneess ffoorr

iinnffoorrmmaattiioonn oonn aalllloowwaabbllee ppeerrssoonnaall eexxppoossuurree

lleevveellss,, pprrooppeerr rreessppiirraattoorryy pprrootteeccttiioonn aanndd

hhaannddlliinngg rreeccoommmmeennddaattiioonnss..

•• IIff tthheerree iiss aa rriisskk ooff aarrcc oorr ffllaasshh,, tteecchhnniicciiaannss

MMUUSSTT ppuutt oonn aallll PPeerrssoonnaall PPrrootteeccttiivvee

EEqquuiippmmeenntt ((PPPPEE)) iinn aaccccoorrddaannccee wwiitthh NNFFPPAA

7700EE oorr ootthheerr ccoouunnttrryy--ssppeecciiffiicc rreeqquuiirreemmeennttss

ffoorr aarrcc ffllaasshh pprrootteeccttiioonn,, PPRRIIOORR ttoo sseerrvviicciinngg

tthhee uunniitt..

SS-SVX12C-EN 3

WWAARRNNIINNGG

RReeffrriiggeerraanntt uunnddeerr HHiigghh PPrreessssuurree!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn

aann eexxpplloossiioonn wwhhiicchh ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss

iinnjjuurryy oorr eeqquuiippmmeenntt ddaammaaggee..

SSyysstteemm ccoonnttaaiinnss ooiill aanndd rreeffrriiggeerraanntt uunnddeerr hhiigghh

pprreessssuurree.. RReeccoovveerr rreeffrriiggeerraanntt ttoo rreelliieevvee pprreessssuurree

bbeeffoorree ooppeenniinngg tthhee ssyysstteemm.. SSeeee uunniitt nnaammeeppllaattee ffoorr

rreeffrriiggeerraanntt ttyyppee.. DDoo nnoott uussee nnoonn--aapppprroovveedd

rreeffrriiggeerraannttss,, rreeffrriiggeerraanntt ssuubbssttiittuutteess,, oorr rreeffrriiggeerraanntt

aaddddiittiivveess..

Copyright

This document and the information in it are the

property of Trane and may not be used or reproduced

in whole or in part, without the written permission of

Trane. Trane reserves the right to revise this publication

at any time and to make changes to its content without

obligation to notify any person of such revision or

change.

Trademarks

All trademarks referenced in this document are the

trademarks of their respective owners.

Revision History

Removed warranty chapter, updated with running

edits.

IInnttrroodduuccttiioonn

4SS-SVX12C-EN

Model Number Description. . . . . . . . . . . . . . . . . 6

Cooling Condenser . . . . . . . . . . . . . . . . . . . . . . . 6

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

Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Inspection Checklist . . . . . . . . . . . . . . . . . . . 8

Testing for Leaks. . . . . . . . . . . . . . . . . . . . . . . . . . 8

Lifting Recommendations . . . . . . . . . . . . . . . . . 8

Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Unit Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Structural Preparation . . . . . . . . . . . . . . . . . 9

Rooftop Mounting . . . . . . . . . . . . . . . . . . . . 9

Ground Level Mounting . . . . . . . . . . . . . . . 9

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . 10

Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Cooling Condenser . . . . . . . . . . . . . . . . . . . . . . 14

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Refrigerant Piping Guidelines. . . . . . . . . . . . . 15

Refrigerant Piping Procedures (Outdoor

Units). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Refrigerant Piping Procedures (Indoor

Unit). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

System Evacuation. . . . . . . . . . . . . . . . . . . 17

Insulating and Isolating Refrigerant

Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Refrigerant Charging Procedure . . . . . . . . . . 18

Liquid Charging . . . . . . . . . . . . . . . . . . . . . . . . . 19

Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 19

Unit Power Supply . . . . . . . . . . . . . . . . . . . 20

Low Voltage Wiring . . . . . . . . . . . . . . . . . . 20

Electromechanical Controls . . . . . . . . . . . 20

ReliaTel™Controls . . . . . . . . . . . . . . . . . . . 20

Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 21

Refrigerant Circuit. . . . . . . . . . . . . . . . . . . . 24

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Charging Charts and Superheat . . . . . . . . . . . 26

Installation Checklist. . . . . . . . . . . . . . . . . . . . . . . 27

Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . 27

Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 27

Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Control Circuit Features . . . . . . . . . . . . . . . . . . 28

Discharge Temperature Limit

(DTL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Low Outdoor Ambient Cooling . . . . . . . . 28

Evaporator Defrost Control

(EDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Low Pressure Cut-Out (LPCO) . . . . . . . . . 28

High Pressure Cut-Out (HPCO) . . . . . . . . 28

Internal Overload Protector

(IOL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Electromechanical Controls. . . . . . . . . . . . . . . 29

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Evaporator Fan (Indoor Supply

Air) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Cooling Mode . . . . . . . . . . . . . . . . . . . . . . . 29

ReliaTel™ Controls . . . . . . . . . . . . . . . . . . . . . . 29

Control Cooling Mode . . . . . . . . . . . . . . . . 29

Control Evaporator Fan

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Control Heating Operation . . . . . . . . . . . . 30

Service Test Modes for ReliaTel™

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Test Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Step Test Mode . . . . . . . . . . . . . . . . . . . . . . 31

Resistance Test Mode . . . . . . . . . . . . . . . . 31

Auto Test Mode . . . . . . . . . . . . . . . . . . . . . . 31

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Troubleshooting ReliaTel™ Controls. . . . . . . 32

System Status Checkout Procedure . . . . . . . 32

Method 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Method 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Resetting Cooling and Heating

Lockouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Method 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Method 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Zone Temperature Sensor (ZTS) Service

Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Temperature Tests . . . . . . . . . . . . . . . . . . . . . . . 34

Test 1 - Zone Temperature

Thermistor (ZTEMP). . . . . . . . . . . . . . . . . . 34

Test 2 - Cooling Set Point (CSP) and

Heating Set Point (HSP). . . . . . . . . . . . . . . 34

Test 3 - System Mode and Fan

Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Test 4 - LED Indicator Test (SYS ON,

HEAT, & COOL). . . . . . . . . . . . . . . . . . . . . . . 35

Programmable & Digital Zone Sensor

Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table of Contents

SS-SVX12C-EN 5

Testing Serial Communication

Voltage.............................. 35

RLCI Loss of Communications. . . . . . . . . 35

Maintenance ..............................36

Monthly ................................ 36

Annually (Cooling Season) . . . . . . . . . . . . . . . 36

CoilCleaning............................ 36

Maintenance Log . . . . . . . . . . . . . . . . . . . . . . . . 37

Wiring Diagram Matrix . . . . . . . . . . . . . . . . . . . . 38

TTaabbllee ooff CCoonntteennttss

6SS-SVX12C-EN

Model Number Description

Cooling Condenser

T T A 120 A 3 0 0 * *

1 2 3 4 5 6 7 8 9 10 11 12

All products are identified by a multiple-character

model number that precisely identifies a particular type

of unit. An explanation of the alphanumeric

identification code is provided. Its use will enable the

owner/operator, installing contractors, and service

engineers to define the operation, specific

components, and other options for any specific unit.

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.

DDIIGGIITTSS 11 -- 33:: PPrroodduucctt TTyyppee

TTA = Split System Cooling

DDIIGGIITTSS 44 -- 66:: NNoommiinnaall GGrroossss CCoooolliinngg CCaappaacciittyy

((MMBBhh))

090 = 7.5 Tons (60Hz)

120 = 10 Tons (60Hz)

180 = 15 Tons (60Hz)

240 = 20 Tons (60Hz)

DDIIGGIITT 77:: MMaajjoorr DDeevveellooppmmeenntt SSeeqquueennccee

A = Single Compressor, Single Circuit, R-22

B = Dual Compressor, Dual Circuit, R-22

DDIIGGIITT 88:: EElleeccttrriiccaall CChhaarraacctteerriissttiiccss

3 = 208–230/60/3

4 = 460/60/3

DDIIGGIITTSS 99 -- 1100:: FFaaccttoorryy IInnssttaalllleedd OOppttiioonnss

00 = Packed Stock

DDIIGGIITTSS 1111:: MMiinnoorr DDeessiiggnn SSeeqquueennccee

* = Current Design Sequence1

DDIIGGIITTSS 1122:: SSeerrvviiccee DDiiggiitt

* = Current Design Sequence1

1. * = sequential alpha character

SS-SVX12C-EN 7

General Information

This manual 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.

Should equipment failure occur, contact a qualified

service organization with qualified, experienced HVAC

technicians to properly diagnose and repair this

equipment.

IImmppoorrttaanntt:: All phases of this installation must comply

with the NATIONAL, STATE & LOCAL

CODES. In addition to local codes, the

installation must conform with National

Electric Code -ANSI/NFPA NO. 70 LATEST

REVISION.

Any individual installing, maintaining, or servicing this

equipment must be properly trained, licensed and

qualified.

IImmppoorrttaanntt:: Do not remove the VFD without first

contacting technical support! For

performance-related questions and

diagnostic support in North America call 1-

877-872-6363. Any return requires a claim

number FIRST. Removal of the VFD prior to

this step will void the unit’s warranties.

Installation procedures should be performed in the

sequence that they appear in this manual. Do not

destroy or remove the manual from the unit. The

manual should remain weather-protected with the unit

until all installation procedures are complete.

NNoottee:: It is not the intention of this manual to cover all

possible variations in systems that may occur or

to provide comprehensive information

concerning every possible contingency that may

be encountered during an installation. If

additional information is required or if specific

problems arise that are not fully discussed in this

manual, contact your local sales office.

Use the ”Installation Checklist,” p. 27 provided In this

manual to verify that all necessary installation

procedures have been completed. Do not use the

checklist as a substitute for reading the information

contained in the manual. Read the entire manual

before beginning installation procedures.

Unit Description

These condensers come with single and dual

compressor options. Single compressor outdoor units

feature a single refrigeration circuitry, requiring only

one set of refrigerant lines. Dual compressor/dual

circuit models give true stand-by protection; if one

compressor fails, the second will automatically start-

up. Also, the first compressor can be serviced without

shutting down the unit since the refrigerant circuits are

independent. During light load conditions, only one

compressor will operate to save energy.

8SS-SVX12C-EN

Pre-Installation

Unit Inspection

Inspect material carefully for any shipping damage. If

damaged, it must be reported to, and claims made

against the transportation company. Compare the

information that appears on the unit nameplate with

ordering and submittal data to ensure the proper unit

was shipped. Available power supply must be

compatible with electrical characteristics specified on

component nameplates. Replace damaged parts with

authorized parts only.

Inspection Checklist

To protect against loss due to damage incurred in

transit, complete the following checklist upon receipt of

the unit.

Inspect individual pieces of the shipment before

accepting the unit. Check for obvious damage to the

unit or packing material.

Inspect the unit for concealed damage before it is

stored and as soon as possible after delivery.

Concealed damage must be reported within 15

days. If concealed damage is discovered, stop

unpacking the shipment. 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 carrier’s terminal of damage immediately

by phone and by mail. Request an immediate joint

inspection of the damage by the carrier and the

consignee.

Notify the sales representative and arrange for

repair. Do not repair the unit until the damage is

inspected by the carrier’s representative.

Testing for Leaks

All units are shipped with a holding charge of nitrogen

in each circuit and should be leak tested before

installation.

1. Remove the access panel.

2. Locate the liquid line or suction line access valve for

each circuit.

3. Install gauges to determine if the circuits are still

pressurized. If not, the charge has escaped and

should be repaired as required to obtain a leak-free

circuit.

Lifting Recommendations

WWAARRNNIINNGG

IImmpprrooppeerr UUnniitt LLiifftt!!

FFaaiilluurree ttoo pprrooppeerrllyy lliifftt uunniitt ccoouulldd rreessuulltt iinn uunniitt

ddrrooppppiinngg aanndd ppoossssiibbllyy ccrruusshhiinngg ooppeerraattoorr//

tteecchhnniicciiaann wwhhiicchh ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss

iinnjjuurryy,, aanndd eeqquuiippmmeenntt oorr pprrooppeerrttyy--oonnllyy ddaammaaggee..

TTeesstt lliifftt uunniitt aapppprrooxxiimmaatteellyy 2244 iinncchheess ttoo vveerriiffyy

pprrooppeerr cceenntteerr ooff ggrraavviittyy lliifftt ppooiinntt.. TToo aavvooiidd

ddrrooppppiinngg ooff uunniitt,, rreeppoossiittiioonn lliiffttiinngg ppooiinntt iiff uunniitt iiss

nnoott lleevveell..

NNOOTTIICCEE

EEqquuiippmmeenntt DDaammaaggee!!

UUssee sspprreeaaddeerr bbaarrss ttoo pprreevveenntt ssttrraappss ffrroomm

ddaammaaggiinngg tthhee uunniitt.. IInnssttaallll tthhee bbaarrss bbeettwweeeenn lliiffttiinngg

ssttrraappss,, bbootthh uunnddeerrnneeaatthh tthhee uunniitt aanndd aabboovvee tthhee

uunniitt ttoo pprreevveenntt tthhee ssttrraappss ffrroomm ccrruusshhiinngg tthhee uunniitt

ccaabbiinneett oorr ddaammaaggiinngg tthhee ffiinniisshh..

Before preparing the unit for lifting, estimate the

approximate center of gravity for lifting safety. Because

of placement of internal components, the unit weight

may be unevenly distributed. See ”Weights”, p. 14 for

approximate unit weights.

The crated unit can be moved using a forklift of suitable

capacity. For lifting the unit, attach lifting straps or

slings securely to the lifting holes at each corner (see

unit drawings in ”Weights”, p. 14). Use spreader bars to

protect the unit casing from damage. Test lift the unit to

determine proper balance and stability.

Clearances

Provide enough space around the unit to allow

unrestricted access to all service points. Refer to the

”Dimensional Data,” p. 10 for unit dimensions and

minimum required service and free air clearances.

Observe the following points to ensure proper unit

operation.

1. Do not install the unit under a low overhang.

Condenser discharge must not be restricted—refer

to notes in ”Dimensional Data drawings,” p. 10.

IImmppoorrttaanntt:: Do not obstruct condenser discharge

air. This can result in warm air

recirculation through the coil.

2. Do not locate the unit in a position where runoff

water can fall into the fan discharge openings.

3. Condenser intake air is supplied from three or four

sides of the unit. Adhere to the minimum required

clearances given in unit dimensional drawings (see

”Dimensional Data,” p. 10).

SS-SVX12C-EN 9

Unit Mounting

WWAARRNNIINNGG

MMoouunnttiinngg IInntteeggrriittyy!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonn bbeellooww ccoouulldd rreessuulltt iinn

ddeeaatthh oorr sseerriioouuss iinnjjuurryy oorr ppoossssiibbllee eeqquuiippmmeenntt oorr

pprrooppeerrttyy--oonnllyy ddaammaaggee..

EEnnssuurree tthhee rrooooff ssttrruuccttuurree ssuuppppoorrttss aarree ssttrroonngg

eennoouugghh ttoo ssuuppppoorrtt tthhee wweeiigghhtt ooff tthhee uunniitt aanndd aannyy

aacccceessssoorriieess..

Structural Preparation

NNOOTTIICCEE

RRooooff DDaammaaggee!!

SSyysstteemm ccoonnttaaiinnss ooiill aanndd rreeffrriiggeerraanntt uunnddeerr hhiigghh

pprreessssuurree.. RRooooffss sshhoouulldd bbee pprrootteecctteedd ffrroomm

eexxppoossuurree ttoo ooiillss aanndd rreeffrriiggeerraanntt iinn tthhee ssyysstteemm.. IIff

rrooooffttoopp iiss nnoott pprrootteecctteedd,, ddaammaaggee ttoo tthhee rrooooff mmaayy

ooccccuurr..

IImmppoorrttaanntt:: Refer to local building codes for proper

installation. All installation must comply

with local building codes.

Rooftop Mounting

If the unit will be roof mounted, determine for certain

that the structure is strong enough to support the unit

and any required accessories, see ”Weights”, p. 14. The

unit should be elevated on a level, field fabricated four-

inch steel or wood 4" x 4" mounting frame. Complete

the frame and secure it into position before lifting the

unit to the roof. The mounting frame must support a

minimum of three of the unit’s four sides and should

span roof supports to distribute the load on the roof.

Figure 1. Roof mounted unit

Outdoor Unit

Gas (Suction)

Line - Insulated

Liquid Line

Insulated

Unit Mounting

Channels

Elevation

(Mounting Fram e)

Roof Trussing

Ceiling

Roof

Construction

6”

Radius

Ground Level Mounting

For ground level installation, the unit base should be

adequately supported and hold the unit near level. The

installation must meet the guidelines set forth in local

codes. The support should extend two inches beyond

the unit base channels at all points. The unit and

support must be isolated from any adjacent structure to

prevent possible noise or vibration problems. Any

ground level location must comply with required

clearances given in the unit dimensional drawings (see

”Dimensional Data,” p. 10).

PPrree--IInnssttaallllaattiioonn

10 SS-SVX12C-EN

Dimensional Data

Figure 2. Height, width and depth measurements

H

WD

H

W

D

H - in. (mm) W - in. (mm) D - in. (mm)

TTA090A 39.125 (993.8) 42.125 (1070) 36 (914.4)

TTA120A 39.125 (993.8) 52.125 (1324) 40 (1016)

TTA 156, 180, 201, 240TTA180B, 240B 45.125 (1146.1) 95.5 (2425.7) 45.875 (1165.2)

NNoottee:: Full dimensional data available on next pages.

SS-SVX12C-EN 11

Figure 3. 7.5 ton condensing unit, single compressor

BOTTOM

OF UNIT

7 15/16"

(201.6)

16 7/16"

(417.5)

29 13/16"

(757.2)

34 1/8" (866.8)

14 3/8"

(365.1)

26 15/16"

(684.2)

39 3/16"

(995.3)

2 7/8"

(73)

1 7/8"

(47.6)

33 13/1 6"

(858 .8)

1/16"

(1.59)

6" (152.4)

21 11 /16"

(550.9)

6" (152.4)

34 3/4"

(882.6)

40 3/4"

(1035)

3" (76. 2)

1 13/16"

(46)

27 11/ 16"

(703.3 )

2 5/16"

(58.7)

4 3/16"

(106.36)

33 7/8"

(860.4)

35 15/1 6"

(912 .8)

40 15/16"

(1039.8)

41 15/16"

(1065. 2)

NOTES:

1. ACCESS OPENING IS FOR FIELD INSTALLED BAYLOAM ACCESSORY.

2. MINIMUM CLEARANCE FOR PROPER OPERATION IS 36" (914.4) FROM

WALLS, SHRUBBERY, PRIVACY FENCES ETC. MINIMUM CLEARANCE

BETWEEN ADJACENT UNITS IS 72" (1828.8). RECOMMENDED S ERVICE

C LEARANCE 48"

(1219. 2)

3. TOP DISCHARGE AREA SHOULD BE UNRESTRICTED FOR 100" (2540)

MINIMUM. UNIT S HOULD BE PLACED S O ROOF RUN-OFF WATER DOES

NOT POUR DIRECTLY ON UNIT

4. OUTDOOR AIR TEMPERATURE SENSOR OPENING (DO NOT BLOCK OPENING)

SERVICE CLEARANCE

48" (1219.2) (SEE NOTE 2

FOR CLEARANCE) SEE NOTE 1

REFRIGERANT ACCESS

HAIL GUARD

(OPTIONAL)

SUCTION LINE

LIQUID LINE

CONTROL WIRING

LINE VOLTAGE

SER VICE PANEL

HAIL GUARD

(OP TIONAL)

SERVICE PANEL

7/16" (11.11) DIA. ISOLATOR MOUNTING

HOLES (OUTSIDE HOLES - 4 PLACES)

SEE NOTE 3

SERVIC E PANEL SIDE

SEE NOTE 4

WITH HAIL GUARD

WITH HAIL GUARD

DDiimmeennssiioonnaall DDaattaa

12 SS-SVX12C-EN

Figure 4. 10 ton condensing unit, single compressor

BOTTOM

OF UNIT

14 5/16"

(363.5)

26 7/8"

(682.6)

39 1/8"

(993.8)

2 7/8" (73)

1 7/8"

(47.6)

34 1/16" (865.2)

7 1/2"

(190.5)

8 1/4"

(209.5)

29 3/4"

(755.6)

4 15/16"

(125.4)

1 15/16" (49.2)

4 1/4"

(108) 1 1/4"

(31.7)

37 11/1 6"

(957 .3)

1/16"

(1.6)

6"

(152. 4)

25 11/1 6"

(652 .5)

37 15/1 6"

(963 .6)

3" (76. 2)

50 3/4"

(1289) 44 3/4"

(1136.6)

1 11/16"

(42.9)

31 11/1 6"

(804.9)

3 13/16"

(96.8)

2 3/16"

(55.6)

39 15 /16"

(1014 .4)

50 15/16"

(1294)

51 15/16"

(1319.2)

LIQUID LINE

SUCTION LINE

SERVICE PANEL SIDE

SERVICE CLEARANCE

48" (1219.2) (SEE NOTE 2

FOR CLEARANCE

HAIL GUARD

(OP TIONAL)

SERVICE PANEL

SEE NOTE 3

HAIL GUARD

(OP TIONAL)

SER VICE PANEL

CONTROL WIRING

LINE VOLTAGE

REFRIGERANT ACCESS

SEE NOTE 1

SEE NOTE 4

WITH HAIL GUARD

7/16" (11.1) DIA. ISOLATOR MOUNTING

HOLES (OUTSIDE HOLES - 4 PLACES)

NOTES:

1. ACCESS OPENING IS FOR FIELD INSTALLED BAYLOAM ACCESSORY.

2. MINIMUM CLEARANCE FOR PROPER OPERATION IS 36" (914.4) FROM

WALLS, SHRUBBERY, PRIVACY FENCES ETC. MINIMUM CLEARANCE

BETWEEN ADJACENT UNITS IS 72" (1828.8). RECOMMENDED SERVICE

C LEARANCE 48" (1219.2)

3. TOP DISCHARGE AREA SHOULD BE UNRESTRICTED FOR 100" (2540)

MINIMUM. UNIT SHOULD BE PLACED SO ROOF RUN-OFF WATER DOES

NOT P OUR DIRECTLY ON UNIT

4. OUTDOOR AIR TEMPERATURE S ENSOR OPENING (DO NOT BLOCK OPENING)

WITH HAIL GUARD

6"

(152. 4)

DDiimmeennssiioonnaall DDaattaa

SS-SVX12C-EN 13

Figure 5. 15, 20 ton condensing unit, dual compressor

BOTTOM OF UNIT

1/16"

(1.6)

9"

(228.6)

9"

(228. 6)

25 11/16"

(652.5)

3/16"

(4.8)

45 1/8"

(1146.2)

41 5/8"

(1057.3)

39 7/8"

(1012.8)

4 3/8"

(111.1)

5 9/16"

(141.3)

12 9/16"

(319.1)

14 5/8"

(371.5)

18 3/4"

(476.2)

6 13/16" (173)

1 3/16" (30.2)

15/16" (23.8)

9 1/4" (235)

3 3/8"

(85.7)

6 5/8"

(168.3)

3 11/16" (93.7)

6 5/16" (160.3)

44"

(1117. 6)

93"

(2362.2)

87"

(2210)

41 1/ 2"

(105 4)

2 3/16"

(55.6)

3" (76. 2)

6 13/16"

(173)

36 7/8"

(936.6)

41 3/8"

(1051)

41 7/16"

(1052.5)

93 5/16"

(2370.1)

95 7/16"

(2424)

46"

(1168.4)

LINE VOLTAGE

SUCTION LINE

REFRIGERANT ACCESS

LIQUID LINES

SUCTION LINE

NOTES:

1. MINIMUM CLEARANCE FOR PROPER OPERATION IS 36" (914.4) FROM

WALLS, SHRUBBERY, PRIVACY FENCES ETC. MINIMUM CLEARANCE

BETWEEN ADJACENT UNITS IS 72" (1828.8). RECOMMENDED SERVICE

C LEARANCE 48" (1219.2)

2. TOP DISCHARGE AREA SHOULD BE UNRESTRICTED FOR 100" (2540)

MINIMUM. UNIT SHOULD BE PLACED SO ROOF RUN-OFF WATER DOES

NOT P OUR DIRECTLY ON UNIT

3. OUTDOOR AIR TEMPERATURE SENSOR OP ENING (DO NOT BLOCK OPENING)

7/16" (11.1) DIA. ISOLATOR MOUNTING

HOLES (OUTSIDE HOLES - 4 PLACES)

SERVICE PANEL SIDE

SERVICE CLEARANCE

48" (1219.2) (SEE NOTE 1

FOR CLEARANCE)

HAIL GUARD

(OPTIONAL)

HAIL GUARD

(OP TIONAL)

SER VICE

PANEL

DIMENSIONAL DETAIL

FRO NT DETAIL A

SEE NOTE 2

HAIL GUARD

(OP TIONAL)

DETAIL A

SERVICE PANEL

CONTROL

WIRING

WITH HAIL GUARD

WITH HAIL GUARD

SEE NOTE 3

DDiimmeennssiioonnaall DDaattaa

14 SS-SVX12C-EN

Weights

Cooling Condenser

Table 1. TTA unit and corner weights — lbs (60 Hz)

Tons Model No. Shipping Max

(lbs) Net Max (lbs) Corner Weights

1 2 3 4

7.5 TTA090A 363 298 84 89 44 81

10 TTA120A 467 395 133 103 70 89

15 TTA180B 850 723 207 204 151 161

20 TTA240B 970 837 262 240 164 171

Figure 6. TTA090A, 120A

#1

#2

#3

#4

LIFTING HOLES (BOTH SIDES)

SERVICE

ACCESS

Figure 7. TTA180B, 240B

SERVICE

ACCESS SERVICE

ACCESS

#1

#2

#3

#4

LIFTING HOLES

(BOTH SIDES)

SS-SVX12C-EN 15

Installation

Refrigerant Piping Guidelines

Figure 8. Allowable elevation difference: Cooling only TTA above indoor unit

Contact manufacturer for review

Figure 9. Allowable elevation difference: TTA below indoor unit

Acceptable liquid-riser height

based on total liquid-line length

(TTA below indoor unit)

Contact manufacturer for review

NNoottee:: Route refrigerant piping for minimum linear length, minimum number of bends and fittings (no reducers) and

minimum amount of line exposed to outdoor ambients.

16 SS-SVX12C-EN

Refrigerant Piping Procedures

(Outdoor Units)

WWAARRNNIINNGG

RR--441100AA RReeffrriiggeerraanntt uunnddeerr HHiigghheerr

PPrreessssuurree tthhaann RR--2222!!

FFaaiilluurree ttoo uussee pprrooppeerr eeqquuiippmmeenntt oorr ccoommppoonneennttss aass

ddeessccrriibbeedd bbeellooww,, ccoouulldd rreessuulltt iinn eeqquuiippmmeenntt ffaaiilliinngg

aanndd ppoossssiibbllyy eexxppllooddiinngg,, wwhhiicchh ccoouulldd rreessuulltt iinn

ddeeaatthh,, sseerriioouuss iinnjjuurryy,, oorr eeqquuiippmmeenntt ddaammaaggee..

TThhee uunniittss ddeessccrriibbeedd iinn tthhiiss mmaannuuaall uussee RR--441100AA

rreeffrriiggeerraanntt wwhhiicchh ooppeerraatteess aatt hhiigghheerr pprreessssuurreess

tthhaann RR--2222.. UUssee OONNLLYY RR--441100AA rraatteedd sseerrvviiccee

eeqquuiippmmeenntt oorr ccoommppoonneennttss wwiitthh tthheessee uunniittss.. FFoorr

ssppeecciiffiicc hhaannddlliinngg ccoonncceerrnnss wwiitthh RR--441100AA,, pplleeaassee

ccoonnttaacctt yyoouurr llooccaall TTrraannee rreepprreesseennttaattiivvee..

Each TTA unit ships with a holding charge of dry

nitrogen. The nitrogen should be removed and the

entire system evacuated (at the proper time) to avoid

possible contamination.

1. Remove the compressor service access panel.

2. Locate the liquid and suction line service valves.

Check that the piping connection stubs on the

valves (Figure 10, p. 16) line up properly with the

holes in the unit cabinet.

Figure 10. Outdoor units - refrigerant piping (with dry

nitrogen)

3. Remove the refrigerant connection seal caps and

open the service valve slowly to release the

nitrogen from the unit.

NNOOTTIICCEE

SSyysstteemm CCoommppoonneenntt DDaammaaggee!!

DDoo nnoott rreemmoovvee tthhee sseeaall ccaappss ffrroomm rreeffrriiggeerraanntt

ccoonnnneeccttiioonnss,, oorr ooppeenn tthhee sseerrvviiccee vvaallvveess uunnttiill

pprreeppaarreedd ttoo bbrraazzee rreeffrriiggeerraanntt lliinneess ttoo tthhee

ccoonnnneeccttiioonnss.. EExxcceessssiivvee eexxppoossuurree ttoo aattmmoosspphheerree ((>>

55 mmiinn..)) mmaayy aallllooww mmooiissttuurree oorr ddiirrtt ttoo ccoonnttaammiinnaattee

tthhee ssyysstteemm,, ddaammaaggiinngg vvaallvvee sseeaallss aanndd ccaauussiinngg iiccee

ffoorrmmaattiioonn iinn ssyysstteemm ccoommppoonneennttss..

WWAARRNNIINNGG

HHaazzaarrdd ooff EExxpplloossiioonn aanndd DDeeaaddllyy

GGaasseess!!

FFaaiilluurree ttoo ffoollllooww aallll pprrooppeerr ssaaffee rreeffrriiggeerraanntt

hhaannddlliinngg pprraaccttiicceess ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss

iinnjjuurryy..

NNeevveerr ssoollddeerr,, bbrraazzee oorr wweelldd oonn rreeffrriiggeerraanntt lliinneess oorr

aannyy uunniitt ccoommppoonneennttss tthhaatt aarree aabboovvee aattmmoosspphheerriicc

pprreessssuurree oorr wwhheerree rreeffrriiggeerraanntt mmaayy bbee pprreesseenntt..

AAllwwaayyss rreemmoovvee rreeffrriiggeerraanntt bbyy ffoolllloowwiinngg tthhee

gguuiiddeelliinneess eessttaabblliisshheedd bbyy tthhee EEPPAA FFeeddeerraall CClleeaann

AAiirr AAcctt oorr ootthheerr ssttaattee oorr llooccaall ccooddeess aass aapppprroopprriiaattee..

AAfftteerr rreeffrriiggeerraanntt rreemmoovvaall,, uussee ddrryy nniittrrooggeenn ttoo

bbrriinngg ssyysstteemm bbaacckk ttoo aattmmoosspphheerriicc pprreessssuurree bbeeffoorree

ooppeenniinngg ssyysstteemm ffoorr rreeppaaiirrss.. MMiixxttuurreess ooff

rreeffrriiggeerraannttss aanndd aaiirr uunnddeerr pprreessssuurree mmaayy bbeeccoommee

ccoommbbuussttiibbllee iinn tthhee pprreesseennccee ooff aann iiggnniittiioonn ssoouurrccee

lleeaaddiinngg ttoo aann eexxpplloossiioonn.. EExxcceessssiivvee hheeaatt ffrroomm

ssoollddeerriinngg,, bbrraazziinngg oorr wweellddiinngg wwiitthh rreeffrriiggeerraanntt

vvaappoorrss pprreesseenntt ccaann ffoorrmm hhiigghhllyy ttooxxiicc ggaasseess aanndd

eexxttrreemmeellyy ccoorrrroossiivvee aacciiddss..

4. Cut, fit and braze tubing, starting at the outdoor unit

and work toward the indoor unit. See

recommended tube sizes, Table 3, p. 18.

NNoottee:: Use long radius ells for all 90° bends.

All brazing should be done using a 2 to 3 psig dry

nitrogen purge flowing through the pipe being

brazed, see Figure 10, p. 16.

NNOOTTIICCEE

SSyysstteemm CCoommppoonneenntt DDaammaaggee!!

IInnssttaallll aa rreegguullaattiinngg vvaallvvee bbeettwweeeenn tthhee nniittrrooggeenn

ssoouurrccee aanndd tthhee ggaauuggee mmaanniiffoolldd.. UUnnrreegguullaatteedd

pprreessssuurree ccaann ddaammaaggee ssyysstteemm ccoommppoonneennttss..

NNOOTTIICCEE

SSyysstteemm CCoommppoonneenntt DDaammaaggee!!

WWeett--wwrraapp aallll vvaallvveess aanndd pprrootteecctt ppaaiinntteedd ssuurrffaacceess

ffrroomm eexxcceessssiivvee hheeaatt.. HHeeaatt ccaann ddaammaaggee ssyysstteemm

ccoommppoonneennttss aanndd tthhee uunniitt ffiinniisshh..

5. Shut off nitrogen supply. Shut off the manifold

valve for the line that is connected to the suction

line service valve. Disconnect the line from the

gauge port on the valve.

IInnssttaallllaattiioonn

SS-SVX12C-EN 17

Refrigerant Piping Procedures

(Indoor Unit)

Once liquid and suction lines are complete to the

refrigerant connections on the indoor unit, remove the

gauge port core(s) on the indoor unit connection stubs

to release the dry nitrogen charge.

NNOOTTIICCEE

UUnniitt DDaammaaggee!!

DDoo nnoott aappppllyy hheeaatt ttoo rreemmoovvee sseeaall ccaappss uunnttiill tthhee

ggaauuggee ppoorrtt ccoorreess hhaavvee bbeeeenn rreemmoovveedd.. IIff sseeaall ccaappss

aarree iinnttaacctt,, aapppplliiccaattiioonn ooff hheeaatt mmaayy ggeenneerraattee

eexxcceessssiivvee pprreessssuurree iinn tthhee uunniitt aanndd rreessuulltt iinn

ddaammaaggee ttoo tthhee ccooiill oorr eexxppaannssiioonn vvaallvvee..

1. Remove both seal caps from the indoor unit

connection stubs.

NNOOTTIICCEE

UUnniitt DDaammaaggee!!

DDoo nnoott rreemmoovvee tthhee sseeaall ccaappss ffrroomm rreeffrriiggeerraanntt

ccoonnnneeccttiioonnss,, oorr ooppeenn tthhee sseerrvviiccee vvaallvveess uunnttiill

pprreeppaarreedd ttoo bbrraazzee rreeffrriiggeerraanntt lliinneess ttoo tthhee

ccoonnnneeccttiioonnss..

2. Turn on nitrogen supply. Nitrogen enters through

the liquid line gauge port.

3. Braze the liquid line connections.

4. Open the gauge port on the suction line and then

braze the suction line to the connection stub.

Nitrogen will bleed out the open gauge port on the

suction line.

5. Shut off nitrogen supply.

Leak Check

WWAARRNNIINNGG

HHaazzaarrdd ooff EExxpplloossiioonn!!

FFaaiilluurree ttoo ffoollllooww tthheessee rreeccoommmmeennddaattiioonnss ccoouulldd

rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy oorr eeqquuiippmmeenntt oorr

pprrooppeerrttyy--oonnllyy ddaammaaggee..

UUssee oonnllyy ddrryy nniittrrooggeenn wwiitthh aa pprreessssuurree rreegguullaattoorr ffoorr

pprreessssuurriizziinngg uunniitt.. DDoo nnoott uussee aacceettyylleennee,, ooxxyyggeenn oorr

ccoommpprreesssseedd aaiirr oorr mmiixxttuurreess ccoonnttaaiinniinngg tthheemm ffoorr

pprreessssuurree tteessttiinngg.. DDoo nnoott uussee mmiixxttuurreess ooff aa

hhyyddrrooggeenn ccoonnttaaiinniinngg rreeffrriiggeerraanntt aanndd aaiirr aabboovvee

aattmmoosspphheerriicc pprreessssuurree ffoorr pprreessssuurree tteessttiinngg aass tthheeyy

mmaayy bbeeccoommee ffllaammmmaabbllee aanndd ccoouulldd rreessuulltt iinn aann

eexxpplloossiioonn.. RReeffrriiggeerraanntt,, wwhheenn uusseedd aass aa ttrraaccee ggaass

sshhoouulldd oonnllyy bbee mmiixxeedd wwiitthh ddrryy nniittrrooggeenn ffoorr

pprreessssuurriizziinngg uunniittss..

WWAARRNNIINNGG

HHaazzaarrdd ooff EExxpplloossiioonn!!

FFaaiilluurree ttoo ffoollllooww rreeccoommmmeennddeedd ssaaffee lleeaakk tteesstt

pprroocceedduurreess ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy

oorr eeqquuiippmmeenntt oorr pprrooppeerrttyy--oonnllyy--ddaammaaggee..

NNeevveerr uussee aann ooppeenn ffllaammee ttoo ddeetteecctt ggaass lleeaakkss.. UUssee aa

lleeaakk tteesstt ssoolluuttiioonn ffoorr lleeaakk tteessttiinngg..

After the brazing operation of refrigerant lines to both

the outdoor and indoor unit is completed, the field

brazed connections must be checked for leaks.

Pressurize the system through the service valve with

dry nitrogen to 200 psi. Use soap bubbles or other leak-

checking methods to ensure that all field joints are leak

free. If not, release pressure, repair and repeat leak test.

System Evacuation

1. After completion of leak check, evacuate the

system.

2. Attach appropriate hoses from manifold gauge to

gas and liquid line pressure taps.

NNoottee:: Unnecessary switching of hoses can be

avoided and complete evacuation of all lines

leading to sealed system can be

accomplished with manifold center hose and

connecting branch hose to a cylinder of R–22

and vacuum pump.

3. Attach center hose of manifold gauges to vacuum

pump.

NNOOTTIICCEE

OOppeerraattiinngg UUnnddeerr VVaaccuuuumm!!

DDoo nnoott ooppeerraattee oorr aappppllyy ppoowweerr ttoo tthhee ccoommpprreessssoorr

wwhhiillee uunnddeerr aa vvaaccuuuumm.. FFaaiilluurree ttoo ffoollllooww tthheessee

iinnssttrruuccttiioonnss wwiillll rreessuulltt iinn ccoommpprreessssoorr ffaaiilluurree..

4. Evacuate the system to hold a 500 micron vacuum.

5. Close off valve to vacuum pump and observe the

micron gauge. If gauge pressure rises above 500

microns in one minute, then evacuation is

incomplete or the system has a leak.

6. If vacuum gauge does not rise above 500 microns in

10 minutes, the evacuation should be complete.

NNOOTTIICCEE

EEqquuiippmmeenntt DDaammaaggee!!

CChhaarrggee wwiitthh aacccceessss ppoorrtt oonn tthhee lliiqquuiidd lliinnee sseerrvviiccee

vvaallvvee oonnllyy..

7. With vacuum pump and micron gauge blanked off,

open valve on R–22 cylinder and allow refrigerant

pressure to build up to about 80 psig.

8. Close valve on the R–22 supply cylinder. Close

valves on manifold gauge set and remove

refrigerant charging hoses from liquid and gas

IInnssttaallllaattiioonn

18 SS-SVX12C-EN

gauge ports.

9. Leak test the entire system. Using proper

procedures and caution, as described in the

previous section, repair any leaks found and repeat

the leak test.

Insulating and Isolating

Refrigerant Lines

Insulate the entire suction line with refrigerant piping

insulation. Also insulate any portion of the liquid line

exposed to temperature extremes. Insulate and isolate

liquid and suction lines from each other. Isolate

refrigerant lines from the structure and any duct work.

IImmppoorrttaanntt::

1. To prevent possible noise or vibration

problems, be certain to isolate

refrigerant lines from the building.

2. All suction and hot gas bypass piping (if

installed) should be insulated from the

termination in the air handler to the

condensing unit cabinet entry. Failure to

do so can cause condensate drip off and

performance degradation.

3. Prior to starting a unit, it is advisable to

have the approved oils available in the

event oil needs to be added to the

system.

NNOOTTIICCEE

EEqquuiippmmeenntt DDaammaaggee!!

TThhiiss iiss PPOOEE ooiill,, wwhhiicchh rreeaaddiillyy aabbssoorrbbss mmooiissttuurree..

AAllwwaayyss uussee nneeww ooiill aanndd nneevveerr lleeaavvee ccoonnttaaiinneerrss

ooppeenn ttoo aattmmoosspphheerree wwhhiillee nnoott iinn uussee..

Table 2. TTA approved oils

Unit Model Number Approved Oils

TTA090, TTA120, TTA180,

TTA240

Trane Oil Part Number

OIL00027

(1 quart container)

For units equipped with compressors containing site

glasses, the oil level must be visible through the sight

glass when the compressor is running under stabilized

conditions and a few minutes after the compressor has

stopped.

Refrigerant Charging Procedure

If charging by weight, refer to Table 3, p. 18 for starting

change. If refrigerant adjustments are needed because

of length of line, refer to ”Charging Charts and

Superheat,” p. 26.

Charge by weight through the gauge port on the liquid

line. Once the charge enters the system, backseat

(open) the liquid line service valve and disconnect the

charging line and replace the cap on the gauge port.

NNootteess::

• R-22 should only be charged in the liquid

state.

• When possible, always charge the

refrigerant into the liquid line of the unit.

• If the entire charge can’t be charged into the

liquid line, the balance of the unit charge can

be metered through a charging manifold set

as liquid — preferably through a schrader

valve into the suction line to the compressor

— only while the compressor is running.

• Check and adjust superheat using Table 6, p.

26, then re-check charging charts to

determine if charge corrections are

necessary.

NNOOTTIICCEE

EEqquuiippmmeenntt DDaammaaggee!!

NNeevveerr cchhaarrggee lliiqquuiidd rreeffrriiggeerraanntt iinnttoo tthhee ssuuccttiioonn

lliinnee ooff tthhee uunniitt wwiitthh tthhee ccoommpprreessssoorr ooffff..

Figure 11. Outdoor units - refrigerant piping

IInnssttaallllaattiioonn

SS-SVX12C-EN 19

Table 3. Estimated charge levels at ARI rated line lengths (25 feet)

Matched Set

Refrigerant Charge Per Circuit

Circuit 1 Circuit 2

Liquid Line

Diameter

Vapor Line

Diameter

TTA090A w/ TWE090A 17.6 N/A 0.625 (5/8") 1.375 (1 3/8")

TTA120A w/ TWE120A 22.5 N/A 0.5 (1/2") 1.375 (1 3/8")

TTA180B w/ TWE180B 19.5 19.5 0.5 (1/2") 1.375 (1 3/8")

TTA240B w/ TWE240B 21.9 21.9 0.5 (1/2") 1.375 (1 3/8")

Liquid Charging

This procedure is accomplished with the unit

operating. Electrical connections must be complete. Do

not proceed until the system is ready to operate.

NNoottee:: The compressor access panel must be installed

when the unit is running and being charged.

Manifold hoses must be routed through

refrigerant gauge access hole(s). See

”Dimensional Data,” p. 10 for specific locations.

WWAARRNNIINNGG

LLiivvee EElleeccttrriiccaall CCoommppoonneennttss!!

FFaaiilluurree ttoo ffoollllooww aallll eelleeccttrriiccaall ssaaffeettyy pprreeccaauuttiioonnss

wwhheenn eexxppoosseedd ttoo lliivvee eelleeccttrriiccaall ccoommppoonneennttss ccoouulldd

rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy..

WWhheenn iitt iiss nneecceessssaarryy ttoo wwoorrkk wwiitthh lliivvee eelleeccttrriiccaall

ccoommppoonneennttss,, hhaavvee aa qquuaalliiffiieedd lliicceennsseedd eelleeccttrriicciiaann

oorr ootthheerr iinnddiivviidduuaall wwhhoo hhaass bbeeeenn pprrooppeerrllyy ttrraaiinneedd

iinn hhaannddlliinngg lliivvee eelleeccttrriiccaall ccoommppoonneennttss ppeerrffoorrmm

tthheessee ttaasskkss..

1. Turn on power to the unit. Allow the system to run

for 15 minutes to stabilize operating conditions.

2. Measure airflow across the indoor coil. Compare

the measurements with the fan performance data in

the Data/Submittal or Service Facts. Once proper

airflow is established, compare discharge pressure

and liquid temperature to the ”Charging Charts,” p.

26. Add or remove refrigerant (liquid only) as

required to obtain correct discharge pressure and

liquid temperature.

3. Check suction line superheat and condenser sub-

cooling to ensure the unit is operating properly.

4. Disconnect all power to the unit.

IImmppoorrttaanntt:: If the unit is charged and left without

power until a later date, the crankcase

heater should be energized for a

minimum of 8 hours prior to powering

the compressor(s).

WWAARRNNIINNGG

HHaazzaarrddoouuss VVoollttaaggee ww//CCaappaacciittoorrss!!

FFaaiilluurree ttoo ddiissccoonnnneecctt ppoowweerr aanndd ddiisscchhaarrggee

ccaappaacciittoorrss bbeeffoorree sseerrvviicciinngg ccoouulldd rreessuulltt iinn ddeeaatthh oorr

sseerriioouuss iinnjjuurryy..

DDiissccoonnnneecctt aallll eelleeccttrriicc ppoowweerr,, iinncclluuddiinngg rreemmoottee

ddiissccoonnnneeccttss aanndd ddiisscchhaarrggee aallll mmoottoorr ssttaarrtt//rruunn

ccaappaacciittoorrss bbeeffoorree sseerrvviicciinngg.. FFoollllooww pprrooppeerr lloocckkoouutt//

ttaaggoouutt pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr ccaannnnoott bbee

iinnaaddvveerrtteennttllyy eenneerrggiizzeedd.. FFoorr vvaarriiaabbllee ffrreeqquueennccyy

ddrriivveess oorr ootthheerr eenneerrggyy ssttoorriinngg ccoommppoonneennttss

pprroovviiddeedd bbyy TTrraannee oorr ootthheerrss,, rreeffeerr ttoo tthhee

aapppprroopprriiaattee mmaannuuffaaccttuurreerr’’ss lliitteerraattuurree ffoorr

aalllloowwaabbllee wwaaiittiinngg ppeerriiooddss ffoorr ddiisscchhaarrggee ooff

ccaappaacciittoorrss.. VVeerriiffyy wwiitthh aann aapppprroopprriiaattee vvoollttmmeetteerr

tthhaatt aallll ccaappaacciittoorrss hhaavvee ddiisscchhaarrggeedd..

FFoorr aaddddiittiioonnaall iinnffoorrmmaattiioonn rreeggaarrddiinngg tthhee ssaaffee

ddiisscchhaarrggee ooff ccaappaacciittoorrss,, sseeee PPRROODD--SSVVBB0066AA--EENN..

5. Remove the charging system from the unit.

6. Replace all panels.

Electrical Wiring

WWAARRNNIINNGG

PPrrooppeerr FFiieelldd WWiirriinngg aanndd GGrroouunnddiinngg

RReeqquuiirreedd!!

FFaaiilluurree ttoo ffoollllooww ccooddee ccoouulldd rreessuulltt iinn ddeeaatthh oorr

sseerriioouuss iinnjjuurryy..

AAllll ffiieelldd wwiirriinngg MMUUSSTT bbee ppeerrffoorrmmeedd bbyy qquuaalliiffiieedd

ppeerrssoonnnneell.. IImmpprrooppeerrllyy iinnssttaalllleedd aanndd ggrroouunnddeedd

ffiieelldd wwiirriinngg ppoosseess FFIIRREE aanndd EELLEECCTTRROOCCUUTTIIOONN

hhaazzaarrddss.. TToo aavvooiidd tthheessee hhaazzaarrddss,, yyoouu MMUUSSTT ffoollllooww

rreeqquuiirreemmeennttss ffoorr ffiieelldd wwiirriinngg iinnssttaallllaattiioonn aanndd

ggrroouunnddiinngg aass ddeessccrriibbeedd iinn NNEECC aanndd yyoouurr llooccaall//

ssttaattee eelleeccttrriiccaall ccooddeess..

Field wiring consists of providing power supply to the

unit, installing the system indoor thermostat and

providing low voltage system interconnecting wiring.

Access to electrical connection locations is shown in

”Dimensional Data,” p. 10. Determine proper wire sizes

and unit protective fusing requirements by referring to

the unit nameplate and/or the unit Service Facts. Field

IInnssttaallllaattiioonn

20 SS-SVX12C-EN

wiring diagrams for accessories are shipped with the

accessory.

Unit Power Supply

The installer must provide line voltage circuit(s) to the

unit main power terminals as shown by the unit wiring

diagrams (available through e-Library or by contacting

a local sales office) or field wiring. Power supply must

include a disconnect switch in a location convenient to

the unit. Ground the unit according to local codes and

provide flexible conduit if codes require and/or if

vibration transmission may cause noise problems.

IImmppoorrttaanntt:: All wiring must comply with applicable

local and national (NEC) codes. Type and

location of disconnect switches must

comply with all applicable codes.

WWAARRNNIINNGG

PPrrooppeerr FFiieelldd WWiirriinngg aanndd GGrroouunnddiinngg

RReeqquuiirreedd!!

FFaaiilluurree ttoo ffoollllooww ccooddee ccoouulldd rreessuulltt iinn ddeeaatthh oorr

sseerriioouuss iinnjjuurryy..

AAllll ffiieelldd wwiirriinngg MMUUSSTT bbee ppeerrffoorrmmeedd bbyy qquuaalliiffiieedd

ppeerrssoonnnneell.. IImmpprrooppeerrllyy iinnssttaalllleedd aanndd ggrroouunnddeedd

ffiieelldd wwiirriinngg ppoosseess FFIIRREE aanndd EELLEECCTTRROOCCUUTTIIOONN

hhaazzaarrddss.. TToo aavvooiidd tthheessee hhaazzaarrddss,, yyoouu MMUUSSTT ffoollllooww

rreeqquuiirreemmeennttss ffoorr ffiieelldd wwiirriinngg iinnssttaallllaattiioonn aanndd

ggrroouunnddiinngg aass ddeessccrriibbeedd iinn NNEECC aanndd yyoouurr llooccaall//

ssttaattee eelleeccttrriiccaall ccooddeess..

NNOOTTIICCEE

UUssee CCooppppeerr CCoonndduuccttoorrss OOnnllyy!!

FFaaiilluurree ttoo uussee ccooppppeerr ccoonndduuccttoorrss ccoouulldd rreessuulltt iinn

eeqquuiippmmeenntt ddaammaaggee aass uunniitt tteerrmmiinnaallss aarree nnoott

ddeessiiggnneedd ttoo aacccceepptt ootthheerr ttyyppeess ooff ccoonndduuccttoorrss..

Low Voltage Wiring

Mount the indoor thermostat, zone sensor, or Night

Setback Panel (NSB) in accordance with the

corresponding thermostat installation instructions.

Install color-coded, weather-proof, multi-wire cable

according to the field wiring schematics (see ”Field

Wiring”, p. 21).

Electromechanical Controls

Wiring shown with dashed lines is to be furnished and

installed by the customer. All customer supplied wiring

must be copper only and must conform to NEC and

local electrical codes. Codes may require line of sight

between disconnect switch and unit.

NNoottee:: When electric heater accessory is used, single

point power entry or dual point power entry is

field optional. Single point power entry option is

through electric heater only.

Figure 12. Electromechanical jobsite connections

T’s t a t

Air Handler

Disconnect S witch

(By Others)

Disconnect S witch

(By Others) Note 2

Electric

Heat Accessory

Disconnect S witch

(By Others)

B

A

B

D

C

A. 3 power wires, line voltage for 3 phase, (2 power wires for

single phase)

B. 3 power wires, line voltage for 3 phase, (2 power wires for

single phase)

C. Cooling only thermostat: 3 to 7 wires depending on stages of

electric heat

D. 3 to 7 wires depending on type of outdoor unit(s)

ReliaTel™™ Controls

Wiring shown with dashed lines is to be furnished and

installed by the customer. All customer supplied wiring

must be copper only and must conform to NEC and

local electrical codes. Codes may require line of sight

between disconnect switch and unit.

NNootteess::

1. When electric heater accessory is used,

single point power entry or dual point power

entry is field optional. Single point power

entry option is through electric heater only.

2. ***Choose only one of the following;

Thermostat, Zone Sensor, or NSB Panel.

IInnssttaallllaattiioonn

SS-SVX12C-EN 21

Figure 13. ReliaTel jobsite connections

NSB P anel

Zo n e

Sensor

T’s t a t

Air Handler

Disconnect S witch

(By Others)

Disconnect S witch

(By Others) Note 2

Electric

Heat Accessory

Disconnect S witch

(By Others)

Note 2

B

A

B

D

F

EC

A. 3 power wires, line voltage for 3 phase, (2 power wires for

single phase)

B. 3 power wires, line voltage for 3 phase, (2 power wires for

single phase)

C. Cooling only thermostat: 3 to 7 wires depending on stages of

electric heat

D. 3 to 7 wires depending on type of outdoor unit(s)

E. Zone Sensor: 4 to 10 wires depending on zone sensor model(a)

F. Night Setback Panel: 7 wires

(a) For SZVAV air handlers: 4 additional wires are required (2 of which

require twisted pair or shielded wire) in order to make connections

between ReliaTel boards in the condenser and air handler.

Field Wiring

Figure 14. Night setback panel field wiring

IInnssttaallllaattiioonn

22 SS-SVX12C-EN

Figure 15. Zone sensor field wiring

Figure 16. Thermostat field wiring

IInnssttaallllaattiioonn

SS-SVX12C-EN 23

Figure 17. Thermostat wiring for electromechanical units

IInnssttaallllaattiioonn

24 SS-SVX12C-EN

Refrigerant Circuit

Figure 18. Typical split system cooling refrigerant circuit

FILTER DRIER

NOTE A: ONLY ONE OUTDOOR AND INDOOR

COIL REFRIGERANT ENTRY AND

EXIT CIRCUIT IS SHOWN. ALL

MODELS HAVE MULTIPLE ENTRY

AND EXIT CIRCUITS.

TXV

S

D

COMPRESSOR

LOW PRESSURE

SWITCH (LPCO)

FIELD SUPPLIED

INTER-CONNECTING

TUBING

OUTDOOR COIL

INDOOR COIL

SERVICE

VALVE

SERVICE

VALVE

EXPANSION

VALVE BULB

EQUALIZER

TUBE

NOTE A

NOTE A

NOTE A

NOTE A

HIGH PRESSURE

SWITCH (HPCO)

GAUGE

CONNECTION

DISCHARGE

TEMPERATURE

LIMIT (DTL)

NOTE B: DUAL CIRCUIT MODELS HAVE 2

REFRIGERATION CIRCUITS.

AIR

AIR

SUB-COOLING CIRCUIT

GAUGE

CONNECTION

INDICATES DIRECTION OF

REFRIGERANT FLOW

COOLING ONLY CIRCUIT DIAGRAM

V

V

IInnssttaallllaattiioonn

SS-SVX12C-EN 25

Electrical Data

Table 4. Electrical characteristics — compressor and condenser fan motors — 60 Hz

Tons Unit Model

Number

Compressor Motor Condenser Fan Motor

No. Volts Phase

Amps

No. Volts Phase

Amps

RLA LRA FLA LRA

(Ea.) (Ea.) (Ea.) (Ea.)

7.5 TTA090A3 1 208-230 3 22.4 164 1 208-230 1 3.1 8.1

TTA090A4 1 460 3 10.9 100 1 460 1 1.6 3.8

10 TTA120A3 1 208-230 3 30.1 225 1 208-230 1 5.0 14.4

TTA120A4 1 460 3 15.5 114 1 460 1 2.5 5.8

15 TTA180B3 2 208-230 3 22.4 164 2 208-230 2 5.0 14.4

TTA180B4 2 460 3 10.9 100 2 460 2 2.5 5.8

20 TTA240B3 2 208-230 3 30.1 225 2 208-230 2 5.0 14.4

TTA240B4 2 460 3 15.5 114 2 460 2 2.5 5.8

Note: Electrical characteristics reflect nameplate values and are calculated in accordance with cULus and ARI

specifications.

Table 5. Unit wiring — condensing units — 60 Hz

Tons Unit Model

Number

Unit Operating

Voltage Range

Minimum Circuit

Ampacity

Maximum Fuse or HACR

Circuit Breaker Size

7.5 TTA090A3 187-253 31.1 45

TTA090A4 414-506 15.2 25

10 TTA120A3 187-253 42.6 60

TTA120A4 414-506 21.9 30

15 TTA180B3 187-253 60.4 80

TTA180B4 414-506 29.5 40

20 TTA240B3 187-253 77.7 100

TTA240B4 414-506 39.9 50

Note: HACR type circuit breaker per NEC.

26 SS-SVX12C-EN

Charging Charts and Superheat

Figure 19. TTA090A charging curve

1

25

150

175

200

225

250

275

300

325

350

375

400

425

55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140

Dis ch arge P res s ure, ps ig

Liquid Temperature Le aving OD Coil, °F

TTA090A Charging Curve

A

dd charge

R

emove

charge

Figure 20. TTA120A charging curve

1

25

150

175

200

225

250

275

300

325

350

375

400

425

55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140

Dis ch arge P res s ure, ps ig

Liquid Temperature Le aving OD Coil, °F

TTA120A Charging Curve

A

dd charge

R

emove

charge

Figure 21. TTA180B charging curve

1

25

150

175

200

225

250

275

300

325

350

375

400

425

55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140

D

isc ha rge Pre s su re , ps ig

L

iquid Temp eratu re Lea ving OD Coil, °F

T

TA180B Cha rg ing Curve

A

dd ch arg e

R

emo ve

charg e

Figure 22. TTA240B charging curve

1

25

150

175

200

225

250

275

300

325

350

375

400

425

55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140

D

isc ha rge Pre s su re , ps ig

L

iquid Temp eratu re Lea ving OD Coil, °F

T

TA240B Cha rg ing Curve

A

dd ch arg e

R

emo ve

charg e

Table 6. TTA superheat with matched TWE air handler

Condenser Air Handler

Cooling Superheat

Circuit 1 Circuit 2

TTA090A TWE090A 12.8 —

TTA120A TWE120A 15.5 —

TTA180B TWE180B 18.4 18.4

TTA240B TWE240B 15.2 15.2

Notes:

1. An adjustable TXV is provided for each circuit in the TWE and TWA models. If the application causes the superheat to deviate from the values shown

above by more than 1 degree - after the system has achieved steady state - the TXV should be adjusted to provide the values shown as measured at

the compressor.

2. The values given above have been tested and are approved for the matched sets shown. If an alternate combination is used, an expansion device

should be used that provides 16-20°F degrees of superheat measured at the compressor.

3. Check and adjust superheat using this table, then compare with charging chart to determine if charge corrections are necessary.

SS-SVX12C-EN 27

Installation Checklist

Complete this checklist once the unit is installed to

verify that all recommended procedures have been

accomplished before starting the system. Do not

operate the system until all items covered by this

checklist are complete.

Inspect unit location for proper required service

clearances.

Inspect unit location for proper free air clearances.

Inspect unit location for secure, level mounting

position.

Refrigerant Piping

Properly sized/constructed liquid and suction lines

connected to stubs at both the indoor and outdoor

units?

Insulated the entire suction line?

Insulated portions of liquid line exposed to

extremes in temperature?

Performed initial leak test?

Evacuated each refrigerant circuit to 500 microns?

Charged each circuit with proper amount of R-22?

Electrical Wiring

Provided unit power wiring (with disconnect) to

proper terminals in the unit control section?

Installed system indoor thermostat?

Installed system low voltage interconnecting wiring

to proper terminals of outdoor unit, indoor unit and

system thermostat?

28 SS-SVX12C-EN

Pre-Start

Control Circuit Features

NNoottee:: Not all of these features may be required for your

unit, check electrical schematic.

Discharge Temperature Limit (DTL)

The control’s sensor is located on the discharge line.

This device will shut off the compressor and the

outdoor fan(s) if the discharge temperature exceeds the

DTL setting. Once the discharge temperature has

returned to normal, the compressor will cycle back on.

Low Outdoor Ambient Cooling

The Evaporator Defrost Control is standard equipment

on Air Handlers and will permit low ambient cooling

down to 50°F. For cooling operation down to 0°F, use an

Accessory Head Pressure Control on the outdoor unit.

Evaporator Defrost Control (EDC)

This control is located in the Air Handler. The control’s

sensing tube is embedded vertically in the evaporator

coil, near the center. This device will stop the

compressor if the indoor coil temperature drops below

its setting. The indoor air will still circulate across the

coil bringing the temperature of the coil back up to the

cut-in temperature of the evaporator defrost control.

Low Pressure Cut-Out (LPCO)

This control’s sensor is located in the suction (gas) line,

near the compressor. This control will stop the

compressor and the outdoor fans if suction pressure

drops below the Low Pressure Cut-Out setting. Once

the suction pressure has returned to normal, the

compressor and outdoor fans will cycle back on.

High Pressure Cut-Out (HPCO)

This control’s sensor is located in the discharge line.

This device will shut off the compressor and the

outdoor fan(s) if the discharge pressure exceeds the

High Pressure Cut-Out’s setting. Once the discharge

pressure has returned to normal, the compressor will

cycle back on.

WWAARRNNIINNGG

PPrreevveenntt IInnjjuurryy!!

DDuuee ttoo aaggeennccyy ssaaffeettyy rreeqquuiirreemmeennttss,, nnoo sscchhrraaddeerr

ccoorree iiss ttoo bbee iinnssttaalllleedd bbeenneeaatthh tthhee HHPPCCOO.. RReemmoovvaall

ooff tthhee HHPPCCOO wwiitthhoouutt eevvaaccuuaattiinngg tthhee ssyysstteemm cchhaarrggee

ccoouulldd ccaauussee iinnjjuurryy aanndd rreelleeaassee ooff rreeffrriiggeerraanntt..

Internal Overload Protector (IOL)

This device is embedded in the compressor. It will shut

off the compressor if the discharge temperature of the

compressor exceeds its design trip temperature.

NNoottee:: The IOL will put the compressor back in

operation once the compressor motor heat has

dropped below the trip setting; however, a check

of the refrigerant and electrical systems should

be made to determine the cause and be

corrected.

SS-SVX12C-EN 29

Start-Up

Electromechanical Controls

The 24–volt, electromechanical controls feature a

control transformer and contactor pressure lugs for

power wiring. Once the unit is properly installed and

pre-start procedures are complete, start the unit by

turning the System Switch on the indoor thermostat to

either HHEEAATT,CCOOOOLL or AAUUTTOO. The system should

operate normally.

NNOOTTIICCEE

EEqquuiippmmeenntt DDaammaaggee!!

EEnnssuurree tthhee ddiissccoonnnneecctt ffoorr tthhee iinnddoooorr aaiirr hhaannddlleerr iiss

cclloosseedd bbeeffoorree ooppeerraattiinngg tthhee ssyysstteemm.. OOppeerraattiinngg tthhee

oouuttddoooorr uunniitt wwiitthhoouutt tthhee iinnddoooorr ffaann eenneerrggiizzeedd ccaann

ccaauussee uunniitt ttrriipp--oouutt oonn hhiigghh pprreessssuurree ccoonnttrrooll aanndd//oorr

lliiqquuiidd fflloooodd bbaacckk ttoo tthhee ccoommpprreessssoorr..

General

Operation of the system cooling (and optional heating)

cycles is controlled by the position of the system switch

on the room thermostat. Once the system switch is

placed in either the HHEEAATTor CCOOOOLL position, unit

operation is automatic. The optional automatic

changeover thermostat, when in the AAUUTTOO position,

automatically changes to heat or cool with sufficient

room temperature change.

Evaporator Fan (Indoor Supply Air)

The evaporator fan is controlled by an OONN//AAUUTTOO

switch on the room thermostat. With the switch

positioned at AAUUTTOO and the system operating in the

cooling mode, fan operation coincides with the cooling

run cycles. If the system is equipped with heat and is

operating in the heating mode while the fan switch is at

AAUUTTOO, fan operation coincides with the heating run

cycles. When the fan switch is positioned at OONN, fan

operation is continuous.

Cooling Mode

With the disconnect switch in the OONN position, current

is supplied to the compressor sump heater(s), phase

monitor and control transformer. The sump heater(s)

supplies heat to the compressor(s) during the ““OOffff””

cycle. The phase monitor looks at the incoming power

to verify that there is no reversed phase, no phase

imbalance, and no loss of phase. If the phase monitor

detects any of these three conditions, it will shut off

control voltage. The transformer steps down the line

voltage to 24V for the low voltage control circuit. When

the room thermostat system switch is positioned at

CCOOOOLL and the fan switch is at AAUUTTOO, the compressor

contactor energizes on a call for cooling. When the

contacts of the compressor contactor close, operation

of the compressor and condenser fan begins. The

evaporator fan contactor also energizes on a call for

cooling and initiates evaporator fan operation.

On units with dual circuits, the second stage of cooling

is initiated as a result of the 2-stage thermostat calling

for additional cooling.

ReliaTel™ Controls

The ReliaTel™ Control is a microelectronic control

feature, which provides operating functions that are

significantly different than conventional

Electromechanical units. The ReliaTel™ Refrigeration

Module (RTRM) uses Proportional/Integral control

algorithms to perform specific unit functions that

govern the unit operation in response to application

conditions.

The RTRM provides compressor anti-short cycle timing

functions through minimum ““OOffff”” and ““OOnn”” timing to

increase reliability, performance and to maximize unit

efficiency. Upon power initialization, the RTRM

performs self-diagnostic checks to ensure that all

internal controls are functioning. It checks the

configuration parameters against the components

connected to the system. The system LED located on

the RTRM module is turned ““OOnn”” within one second

after power-up if all internal operations are okay.

Once the unit is properly installed and pre-start

procedures are complete, start the unit by turning the

System Switch on the indoor thermostat to either

HHEEAATT,CCOOOOLL or AAUUTTOO. The system should operate

normally.

NNOOTTIICCEE

EEqquuiippmmeenntt DDaammaaggee!!

EEnnssuurree tthhee ddiissccoonnnneecctt ffoorr tthhee iinnddoooorr aaiirr hhaannddlleerr iiss

cclloosseedd bbeeffoorree ooppeerraattiinngg tthhee ssyysstteemm.. OOppeerraattiinngg tthhee

oouuttddoooorr uunniitt wwiitthhoouutt tthhee iinnddoooorr ffaann eenneerrggiizzeedd ccaann

ccaauussee uunniitt ttrriipp--oouutt oonn hhiigghh pprreessssuurree ccoonnttrrooll aanndd//oorr

lliiqquuiidd fflloooodd bbaacckk ttoo tthhee ccoommpprreessssoorr..

Control Cooling Mode

For Zone Sensor Control

When the system switch is set to the CCOOOOLL position

and the zone temperature rises above the cooling

setpoint, the RTRM energizes the compressor

contactor, provided the high and low pressure and the

discharge temperature limit controls are closed. When

the compressor contacts close, the compressor and the

outdoor fan motor start to maintain the zone

temperature to within ± 2°F of the sensor setpoint at

the sensed location. On units with dual circuits, the

second stage of cooling is initiated as a result of the

Proportional/Integral control algorithms calling for

additional cooling.

30 SS-SVX12C-EN

For Thermostat Control

When the room thermostat system switch is positioned

at CCOOOOLL and the fan switch is at AAUUTTOO, the RTRM

energizes the compressor contactor, provided the high

and low pressure and the discharge temperature limit

controls are closed. When the contacts of the

compressor contactor close, operation of the

compressor and condenser fan begins. The evaporator

fan contactor also energizes on a call for cooling and

initiates evaporator fan operation. On units with dual

circuits, the second stage of cooling is initiated as a

result of the 2-stage thermostat calling for additional

cooling.

NNoottee:: Irregular unit operation may occur when the unit

is controlled with a triac-switching thermostat.

Please review the approved thermostat vendor

list for all recommended relay-switching

thermostats.

Control Evaporator Fan Operation

When the fan selection switch is set to the AAUUTTOO

position, the RTRM energizes the evaporator fan relay

coil approximately 1 second after energizing the

compressor contactor coil in the cooling mode. In the

heating mode, the RTRM energizes the evaporator fan

relay coil approximately 1 second before energizing the

electric heat contactors.

The RTRM de-energizes the evaporator fan relay coil

approximately 60 seconds on dual compressor units

and 80 seconds on single compressor units after the

cooling requirement has been satisfied to enhance unit

efficiency. When the heating cycle is terminated, the

evaporator fan relay coil is de-energized at the same

time as the heater contactors. When the fan selection

switch is set to the OONN position, the RTRM keeps the

evaporator fan relay coil energized for continuous fan

motor operation.

Control Heating Operation

Electric heat is factory disabled on all split system units

with ReliaTel control (jumper placed between J2-1 and

J2-2 RTRM inputs). To configure the unit for electric

heat, cut or remove the jumper wire between J2-1 and

J2-2 on the RTRM. All split system units with ReliaTel

control are also configured from the factory for only 1-

stage of electric heat (jumper placed between J1-3 and

J1-6 RTRM inputs). To configure the unit for 2-stages of

electric heat, cut or remove the jumper placed between

J1-3 and J1-6 RTRM inputs.

When the system switch is set to the HHEEAATT position

and heating is required, the RTRM energizes the Heat 1

relay coil on the RTRM. When the Heat 1 relay contacts

close, the first stage electric heat contactor is

energized. If the first stage of electric heat cannot

satisfy the heating requirement, the RTRM energizes

the Heat 2 relay coil on the RTRM. When the Heat 2

relay contacts close, the second stage electric heat

contactor is energized. The first and second stages of

heat are cycled ““OOnn”” and ““OOffff”” as required to maintain

the zone.

SSttaarrtt--UUpp

SS-SVX12C-EN 31

Service Test Modes for ReliaTel™™ Controls

Test Modes

Upon power initialization, the RTRM performs self-

diagnostic checks to ensure that all internal controls are

functional. It also checks the configuration parameters

against the components connected to the system. The

system LED located on the RTRM module is turned

““OOnn”” within one second of power-up if internal

operation is okay.

Use one of the following ““TTeesstt”” procedures to bypass

some time delays and to start the unit at the control

panel. Each step of unit operation can be activated

individually by temporarily shorting across the ““TTeesstt””

terminals for 2 to 3 seconds. The system LED located

on the RTRM module will blink when the test mode has

been initiated. The unit can be left in any ““TTeesstt”” step

for up to one hour before it will automatically

terminate, or it can be terminated by opening the main

power disconnect switch. Once the test mode has been

terminated, the system LED will glow continuously and

the unit will revert to the ““SSyysstteemm”” control.

There are three methods in which the ““SSeerrvviiccee TTeesstt””

can be cycled at LTB-Test 1(T1) and LTB-Test 2 (T2).

Step Test Mode

This method initiates the different components of the

unit, one at a time, by temporarily shorting across the

two test terminals for 2 to 3 seconds.

For the initial start-up of the unit, this method allows

the technician to cycle a component ““OOnn”” and have up

to one hour to complete the check. Service Test Mode

will be ignored if a short is present across Test 1 and

Test 2 at start-up.

Resistance Test Mode

This method can be used for start-up when a decade

box for variable resistance outputs is available. This

method initiates the different components of the unit,

one at a time, when a specific resistance value is placed

across the two test terminals. The unit will remain in

the specific test mode for approximately one hour even

though the resistance is left on the test terminals.

Table 7. Service test guide for component operation

TEST STEP MODE FAN COMP 1 COMP 2 HEAT 1 HEAT 2 OHMS

1 Fan On Off Off Off Off 2.2K

2 Cool 1 On On(a) Off Off Off 4.7K

3(b) Cool 2 On On(a) On(a) Off Off 6.8K

4(b) Heat 1 On Off Off On Off 10K

5(b) Heat 2 On Off Off On On 15K

(a) The condenser fans will operate any time a compressor is ON.

(b) Steps for optional accessories and non-applicable modes in unit will be skipped.

Auto Test Mode

This method is not recommended for start-up due to

the short timing between individual component steps.

This method initiates the different components of the

unit, one at a time, when a fixed jumper is installed

across the test terminals.

The unit will start the first test step and change to the

next step every 30 seconds. At the end of the test

mode, control of the unit will automatically revert to the

applied ““SSyysstteemm”” control method. For unit test steps,

test modes, and step resistance values to cycle the

various components, refer to Table 7, p. 31.

32 SS-SVX12C-EN

Troubleshooting

Troubleshooting ReliaTel™

Controls

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The RTRM has the ability to provide the service

personnel with some unit diagnostics and system

status information.

Before turning the main power disconnect switch ““OOffff,,””

follow the steps below to check the ReliaTel™

Refrigeration Module (RTRM). All diagnostics & system

status information stored in the RTRM will be lost when

the main power is turned ““OOffff””.

To prevent injury or death from 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.

NNoottee:: The J6 & J7 screw terminals must be tightened

in order to accurately measure voltage in the

required steps.

1. Verify that the system LED on the RTRM is burning

continuously. If the LED is lit, go to Step 3.

2. If the LED is not lit, verify that 24 VAC is present

between J1-1 and J1-2. If 24 VAC is present,

proceed to Step 3. If 24 VAC is not present, check

the unit main power supply, check transformer

(TNS1). Proceed to Step 3 if necessary.

3. Utilizing ”Method 1”, p. 32 or ”Method 2”, p. 33 in

the System Status Checkout Procedure section,

check the following:

• System status

• Heating status

• Cooling status

NNoottee:: If a System failure is indicated, proceed to

Step 4. If no failures are indicated, proceed to

Step 5.

4. If a System failure is indicated, recheck Step 1 and

Step 2. If the LED is not lit in Step 1, and 24 VAC is

present in Step 2, then the RTRM has failed.

Replace the RTRM.

5. If no failures are indicated, use one of the TEST

mode procedures described in the ”Service Test

Modes chapter,” p. 31 to start the unit. This

procedure will allow you to check all of the RTRM

outputs, and all of the external controls (relays,

contactors, etc.) that the RTRM outputs energize, for

each respective mode. Proceed to Step 6.

6. Step the system through all of the available modes,

and verify operation of all outputs, controls, and

modes. If a problem in operation is noted in any

mode, you may leave the system in that mode for

up to one hour while troubleshooting. Refer to the

sequence of operations for each mode, to assist in

verifying proper operation. Make the necessary

repairs and proceed to Step 7 and Step 8.

7. If no abnormal operating conditions appear in the

test mode, exit the test mode by turning the power

““OOffff”” at the main power disconnect switch.

8. Refer to the individual component test procedures if

other microelectronic components are suspect.

System Status Checkout

Procedure

““SSyysstteemm SSttaattuuss”” is checked by using one of the

following two methods:

Method 1

If the Zone Sensor Module (ZSM) is equipped with a

remote panel with LED status indication, you can check

the unit within the space. If the ZSM does not have

LED’s, use ”Method 2”, p. 33. BAYSENS010B,

BAYSENS011B, BAYSENS119A, BAYSENS020A,

BAYSENS021A, BAYSENS023A, BAYSENS109 and

BAYSENS110 all have the remote panel indication

feature. The LED descriptions are listed below.

•LLEEDD 11 ((SSyysstteemm))

–““OOnn”” during normal operation.

–““OOffff”” if a system failure occurs or the LED fails.

–““FFllaasshhiinngg”” indicates test mode

•LLEEDD 22 ((HHeeaatt))

–““OOnn”” when the heat cycle is operating.

–““OOffff”” when the heat cycle terminates or the LED

fails.

–““FFllaasshhiinngg”” indicates a heating failure.

•LLEEDD 33 ((CCooooll))

–““OOnn”” when the cooling cycle is operating.

–““OOffff”” when the cooling cycle terminates or the

LED fails.

–““FFllaasshhiinngg”” indicates a cooling failure.

The following information describes the complete

listing of failure indication causes.

SS-SVX12C-EN 33

System Failure

Check the voltage between terminals 6 and 9 on J6, it

should read approximately 32 VDC. If no voltage is

present, a System failure has occurred. Refer to Step 4

in the previous section for the recommended

troubleshooting procedure.

Cooling Failure

1. Cooling and heating set point (slide pot) on the

zone sensor has failed. Refer to the ”Programmable

& Digital Zone Sensor Test”, p. 35.

2. Zone temperature thermistor ZTEMP on ZTS failed.

Refer to the ”Programmable & Digital Zone Sensor

Test”, p. 35.

3. CC1 or CC2 24 VAC control circuit has opened,

check CC1 & CC2 coils, and any of the controls

below that apply to the unit (HPC1, HPC2, DTL1,

DTL2).

4. LPC1 has opened during the 3 minute minimum “on

time” during 4 consecutive compressor starts,

check LPC1 or LPC2 by testing voltage between the

J1-8 & J3-2 terminals on the RTRM and ground. If

24 VAC is present, the LPCs have not tripped. If no

voltage is present, LPCs have tripped.

Simultaneous Heat and Cool Failure

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• Emergency Stop is activated.

Method 2

The second method for determining system status is

done by checking voltage readings at the RTRM (J6).

The system indication descriptions and the

approximate voltages are listed below.

System Failure

Measure the voltage between terminals J6-9 & J6-6.

•NNoorrmmaall OOppeerraattiioonn = approximately 32 VDC

•SSyysstteemm FFaaiilluurree = less than 1 VDC, approximately

0.75 VDC

•TTeesstt MMooddee = voltage alternates between 32 VDC &

0.75 VDC

Heat Failure

Measure the voltage between terminals J6-7 & J6-6.

•HHeeaatt OOppeerraattiinngg = approximately 32 VDC

•HHeeaatt OOffff = less than 1 VDC, approximately 0.75 VDC

•HHeeaattiinngg FFaaiilluurree = voltage alternates between 32

VDC & 0.75 VDC

Cool Failure

Measure the voltage between terminals J6-8 & J6-6.

•CCooooll OOppeerraattiinngg = approximately 32 VDC

•CCooooll OOffff = less than 1 VDC, approximately 0.75 VDC

•CCoooolliinngg FFaaiilluurree = voltage alternates between 32

VDC & 0.75 VDC

To use LED’s for quick status information at the unit,

purchase a BAYSENS010B ZSM and connect wires with

alligator clamps to terminals 6 through 10. Connected

each respective terminal wire (6 through 10) from the

Zone Sensor to the unit J6 terminals 6 through 10.

NNoottee:: If the system is equipped with a programmable

zone sensor, (BAYSENS119A, or BAYSENS023A),

the LED indicators will not function while the

BAYSENS010A is connected.

Resetting Cooling and Heating

Lockouts

Cooling Failures and Heating Lockouts are reset in an

identical manner.”Method 1”, p. 33 explains resetting

the system from the space; ”Method 2”, p. 33 explains

resetting the system at the unit.

NNoottee:: Before resetting Cooling Failures and Heating

Lockouts check the Failure Status Diagnostics by

the methods previously explained. Diagnostics

will be lost when the power to the unit is

disconnected.

Method 1

To reset the system from the space, turn the MMOODDEE

selection switch at the zone sensor to the OOFFFF position.

After approximately 30 seconds, turn the MMOODDEE

selection switch to the desired mode, i.e. HHEEAATT,CCOOOOLL,

or AAUUTTOO.

Method 2

To reset the system at the unit, cycle the unit power by

turning the disconnect switch OOFFFF and then OONN

Lockouts can be cleared through the building

management system. Refer to the building

management system instructions for more

information.

Zone Temperature Sensor (ZTS)

Service Indicator

The ZSM SERVICE LED is a generic indicator that will

signal the closing of a Normally Open switch at any

time, providing the Indoor Motor (IDM) is operating.

TTrroouubblleesshhoooottiinngg

34 SS-SVX12C-EN

This indicator is usually used to indicate an airside fan

failure.

The RTRM will ignore the closing of this Normally

Open switch for 2 (±1) minutes. This helps prevent

nuisance SERVICE LED indications.

Temperature Tests

NNoottee:: These procedures are not for programmable or

digital models and are conducted with the Zone

Sensor Module electrically removed from the

system.

Test 1 - Zone Temperature Thermistor

(ZTEMP)

This component can be tested by measuring the

resistance between terminals 1 and 2 on the Zone

Temperature Sensor. See Table 8, p. 34 for typical

indoor temperatures, and corresponding resistive

values.

Table 8. Typical indoor temperatures and values

Zone Temperature Nominal Resistance

50°F or 10.0°C 19.9 Kohms

55°F or 12.8°C 17.47 Kohms

60°F or 15.6°C 15.3 Kohms

Table 8. Typical indoor temperatures and values

(continued)

Zone Temperature Nominal Resistance

65°F or 18.3°C 13.49 Kohms

70°F or 21.1°C 11.9 Kohms

75°F or 23.9°C 10.50 Kohms

80°F or 26.7°C 9.3 Kohms

85°F or 29.4°C 8.25 Kohms

90°F or 32.2°C 7.3 Kohms

Test 2 - Cooling Set Point (CSP) and

Heating Set Point (HSP)

CCooooll SSPP = Terminals 2 and 3

Range = 100 to 900 Ohms approximate

HHeeaatt SSPP = Terminals 2 and 5

Range = 100 to 900 Ohms approximate

Test 3 - System Mode and Fan Selection

The combined resistance of the MMOODDEE selection switch

and the FFAANN selection switch can be measured

between terminals 2 and 4 on the Zone Sensor. The

possible switch combinations are listed in Table 9, p. 34

with their corresponding resistance values.

Table 9. Test 3 - system mode and fan selection

Resistance Valves(Ohms)

Zone Sensor Unit/Fan

Mode Local Unit Mode Local Fan Mode

2.32K Off/Auto Off Auto

4.87K Cool/Auto Cool Auto

7.68K Auto/Auto Auto Auto

10.77K Off/On Off On

13.32K Cool/On Cool On

16.13K Auto/On Auto On

19.48K Heat/Auto Heat Auto

27.93K Heat/On Heat On

35.0K Emergency Heat/Auto Emergency Heat Auto

43.45K Emergency Heat/On Emergency Heat On

Out of Range (Short) INVALID/Short Invalid (CV), Auto (VAV) Invalid

Out of Range (Open) INVALID/Open Invalid (CV), Off (VAV) Invalid

TTrroouubblleesshhoooottiinngg

SS-SVX12C-EN 35

Test 4 - LED Indicator Test (SYS ON,

HEAT, & COOL)

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Method 1

Testing the LED using a meter with diode test function.

Test both forward and reverse bias. Forward bias

should measure a voltage drop of 1.5 to 2.5 volts,

depending on your meter. Reverse bias will show an

Over Load, or open circuit indication if LED is

functional.

Method 2

Testing the LED with an analog Ohmmeter. Connect

Ohmmeter across LED in one direction, then reverse

the leads for the opposite direction. The LED should

have at least 100 times more resistance in reverse

direction, as compared with the forward direction. If

high resistance in both directions, LED is open. If low in

both directions, LED is shorted.

Method 3

To test LED’s with ZSM connected to unit, test voltages

at LED terminals on ZSM. A measurement of 32 VDC,

across an unlit LED, means the LED has failed.

IImmppoorrttaanntt:: Measurements should be made from LED

common (ZSM terminal 6 to respective LED

terminal).

Programmable & Digital Zone

Sensor Test

Testing Serial Communication Voltage

1. Verify 24 VAC is present between terminals J6-14 &

J6-11.

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2. Disconnect wires from J6-11 and J6-12. Measure

the voltage between J6-11 and J6-12, should be

about 32 VDC.

3. Reconnect wires to terminals J6-11 and J6-12.

Measure voltage again between J6-11 and J6-12,

voltage should flash high and low every 0.5

seconds. The voltage on the low end will measure

about 19 VDC, while the voltage on the high end

will measure from approximately 24 to 38 VDC.

4. Verify all modes of operation, by running the unit

through all of the steps in ”Service Test Modes for

ReliaTel Controls,” p. 31.

5. After verifying proper unit operation, exit the test

mode. Turn the fan on continuously at the ZSM, by

pressing the button with the fan symbol. If the fan

comes on and runs continuously, the ZSM is good.

If you are not able to turn the fan on, the ZSM is

defective.

RLCI Loss of Communications

If the RLCI loses input from the building management

system, the RTRM will control in the default mode after

approximately 15 minutes. If the RTRM loses the

Heating and Cooling setpoint input, the RTRM will

control in the default mode instantaneously. The

temperature sensing thermistor in the Zone Sensor

Module is the only component required for the

““DDeeffaauulltt MMooddee”” to operate.

TTrroouubblleesshhoooottiinngg

36 SS-SVX12C-EN

Maintenance

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NNOOTTIICCEE

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Perform all of the indicated maintenance procedures at

the intervals scheduled. This will prolong the life of the

unit and reduce the possibility of costly equipment

failure.

Monthly

Conduct the following maintenance inspections once

per month.

Check unit wiring to ensure all connections are tight

and that the wiring insulation is intact.

Inspect the condenser coils for dirt and debris. If the

coils appear dirty, clean them.

With the unit operating in the cooling mode, check

the suction and discharge pressures and compare

them with Pressure Curve values in unit Service

Facts. Record these readings on the ”Maintenance

Log”, p. 37.

Annually (Cooling Season)

The following maintenance procedures must be

performed at the beginning of each cooling season to

ensure efficient unit operation.

Perform all of the monthly maintenance

inspections.

With the unit operating, check unit superheat and

record the reading in the ”Maintenance Log”, p. 37.

Remove any accumulation of dust and/or dirt from

the unit casing.

Remove corrosion from any surface and repaint.

Check the gasket around the control panel door to

ensure it fits correctly and is in good condition to

prevent water leakage.

Inspect the control panel wiring to ensure that all

connections are tight and that the insulation is

intact.

NNoottee:: Condenser fan motors are permanently

lubricated.

Check refrigerant piping and fittings for leaks

Inspect the condenser coils for dirt and debris. If the

coils appear dirty, clean them.

Coil Cleaning

Regular coil maintenance, including annual cleaning-

enhances the unit's operating efficiency by minimizing:

• compressor head pressure and amperage draw

• water carryover

• fan brake horsepower

• static pressure losses

At least once each year — or more often if the unit is

located in a “dirty” environment — clean the coil 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. Contact your local Parts Center for

appropriate detergents.

1. Remove enough panels from the unit to gain safe

access to coil.

2. Straighten any bent coil fins with a fin comb.

3. Remove loose dirt and debris from both sides of the

coil with a soft brush.

4. Mix the detergent with water according to the

manufacturer's instructions. If desired, heat the

solution to 150° F maximum to improve its

cleansing capability.

5. Pour the cleaning solution into the sprayer.

6. Spray the leaving-airflow side of the coil first; then

spray the opposite side of the coil. Allow the

cleaning solution to stand on the coil for five

minutes.

7. Rinse both sides of the coil with cool, clean water.

8. Inspect both sides of the coil; if it still appears to be

dirty, repeat Step 7 and 8.

9. Reinstall all of the components and panels removed

in Step 1; then restore power to the unit.

10. Using a fin comb, straighten any coil fins that were

inadvertently bent during the cleaning process.

SS-SVX12C-EN 37

Maintenance Log

Date

Ambient

Temp.

(°F)

Evaporator Entering Air Compressor

Superheat (°F)

(at compressor)

Subcooling (°F)

(at service valve)

Dry

Bulb

Wet

Bulb

Suction Pressure Discharge Pressure

Circuit #1 Circuit #2 Circuit #1 Circuit #2

(C1) (C2) (C1) (C2)

Note: Perform each inspection once per month (during cooling season) while unit is operating

MMaaiinntteennaannccee

38 SS-SVX12C-EN

Wiring Diagram Matrix

Table 10. Wiring schematics R-22 cooling

R—22 Unit Power Diagram Connection Diagram

TTA090A300GA 231304550100 231304590100

TTA090A400GA 231304550100 231304590100

TTA120A300GA 231304560100 231304600100

TTA120A400GA 231304550100 231304590100

TTA180B300GA 231304040100 231304210100

TTA180B400GA 231304040100 231304210100

TTA240B300GA 231304080100 231304220100

TTA240B400GA 231304040100 231304210100

Note: Wiring diagrams are available through e-Library or by contacting your local sales office.

SS-SVX12C-EN 39

NNootteess

NNootteess

The manufacturer 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, the manufacturer offers a

broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more

information, visit www.IRCO.com.

The manufacturer has a policy of continuous product and product data improvements and reserves the right to change design and specifications without notice.

©2014 Trane All rights reserved

SS-SVX12C-EN 14 Jan 2014

Supersedes SS-SVX12B-EN (July 2012)

We are committed to using environmentally

conscious print practices that reduce waste.