Installation, Operation,
and Maintenance
Split System Air Conditioners
Odyssey™
™
R-22 Dry Charge
Cooling Condenser — 7.5, 10, 15 and 20 Tons
(60 Hz)
TTA090A***G*
TTA120A***G*
TTA180B***G*
TTA240B***G*
S A F E T Y WA R N I N G
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 2016
SS-SVX12E-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
CAUTION
NOTICE
Indicates a potentially hazardous situation
which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation
which, if not avoided, could result in minor or
moderate injury. It could also be used to alert
against unsafe practices.
Indicates a situation that 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.
WA R N I N G
Prope r Field Wiring a nd Grounding
Required!
Fa il u re to f ol lo w c ode c o ul d r es u lt i n de at h or
s e r i o u s i n j u r y.
All field w ir in g MUST be p er for med b y qualif ied
per sonnel. Improperly installed and grounded
field wiring poses FIRE and ELECTROCUTION
h a z a r d s . To a v o i d t h e s e h a z a r d s , y o u M U S T f o l l o w
requirements for field wiring installation and
grounding as described in NEC and your local/
state electrical codes.
WA R N I N G
Pe r s o n a l P r o t e c t i v e E q u i p m e n t ( P P E )
Required!
Fa il u re to w ea r pro pe r PPE f or t he j ob b ei ng
u n d e rt a k e n c o u l d r e s u l t i n d e a t h o r s e r i o u s i n j u r y.
Te ch n i c i a n s , i n o r d e r t o p r o t e c t t h e m s e l v e s f r o m
p o t e n t i a l e l e c t r i c a l , m e c h a n i c a l , a n d ch e m i c a l
h azards, MUST follow pr ecaut io ns in th is man ual
a n d o n t h e t a g s , s t i ck e r s , a n d l a b e l s , a s w e l l a s t h e
instructions below:
•
Before installing/servicing this unit,
t e ch n i c i a n s M U S T p u t o n a l l P P E r e q u i r e d f o r
t h e w o r k b e i n g u n d e rt a k e n ( E x a m p l e s ; c u t
r e s i s t a n t g l ov e s / s l e e v e s , b u t y l g l ov e s , s a f e t y
glasses, hard hat/bump cap, fall protection,
electrical PPE and arc flash clothing).
A LWAY S r e f e r t o a p p r o p r i a t e M a t e r i a l Sa f e t y
Dat a Sheets ( MSDS)/Saf et y Data Sh eets
(SDS) and OSHA guidelines for proper PPE.
•
Wh en wo rkin g with or arou nd hazardou s
ch e m i c a l s , A LWAY S r e f e r t o t h e a p p r o p r i a t e
MSDS/SDS and OSHA/GHS (Global
H a r m o n i ze d Sy s t e m o f C l a s s i f i c a t i o n a n d
Labelling of Chemicals) guidelines for
in for m at io n on a ll owa bl e pe r s ona l e x pos ur e
levels, proper respiratory protection and
handling instructions.
•
If there is a risk of energized electrical
c o n t a c t , a r c , o r f l a s h , t e ch n i c i a n s M U S T p u t
o n a l l P P E i n a c c o r d a n c e w i t h O S H A , N F PA
7 0 E , o r o t h e r c o u n t r y- s p e c i f i c r e q u i r e m e n t s
for arc flash protection, PRIOR to servicing
the unit. NEVER PERFORM ANY SWITCHING,
D I S C O N N E C T I N G , O R VO LTA G E T E ST I N G
WIT HOUT PROP ER ELECT RIC AL PPE AND
A R C F L A S H C LO T H I N G . E N S U R E
E L E C T R I C A L M E T E R S A N D E Q U I P M E NT A R E
P R O P E R LY R AT E D F O R I NT E N D E D VO LTA G E .
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.
©2016 Trane
All rights reserved
SS-SVX12E-EN
Introduction
WA R N I N G
Re f r i g e r a n t u n de r H i g h Pr e s s u r e !
Fai l ure t o fol l ow i ns tr uc ti on s be l ow c ou ld re s ul t in
a n e x p l o s i o n w h i ch c o u l d r e s u l t i n d e a t h o r s e r i o u s
injury or equipment damage.
Sy s t e m c o n t a i n s o i l a n d r e f r i g e r a n t u n d e r h i g h
pre ssu re . Recove r r ef ri ge ra nt to re li e ve pre ssu re
befor e op en in g t he system. See u nit namep late for
re fri ge ra nt ty pe . Do no t u se non -a pp rove d
refrigerants, refrigerant substitutes, or refrigerant
additi ves.
Copyright
in whole or in part without written permission. 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
•
Wiring matrix updated.
•
Minor running edits included.
This document and the information in it are the
property of Trane, and may not be used or reproduced
SS-SVX12E-EN
3
Table of Contents
Model Number Description . . . . . . . . . . . . . . . . . 5
Cooling Condenser . . . . . . . . . . . . . . . . . . . . . . . 5
General Information . . . . . . . . . . . . . . . . . . . . . . . . 6
Low Voltage Wiring . . . . . . . . . . . . . . . . . .
Electromechanical Controls . . . . . . . . . . .
Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Circuit. . . . . . . . . . . . . . . . . . . .
19
19
20
21
Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Charging Charts and Superheat . . . . . . . . . . . 23
Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Inspection Checklist . . . . . . . . . . . . . . . . . . . 7
Installation Checklist. . . . . . . . . . . . . . . . . . . . . . . 24
Testing for Leaks. . . . . . . . . . . . . . . . . . . . . . . . . . 7
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . 24
Lifting Recommendations . . . . . . . . . . . . . . . . . 7
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 24
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Unit Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Structural Preparation . . . . . . . . . . . . . . . . .
Rooftop Mounting . . . . . . . . . . . . . . . . . . . .
Ground Level Mounting . . . . . . . . . . . . . . .
8
8
8
8
Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Cooling Condenser . . . . . . . . . . . . . . . . . . . . . . 13
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
25
25
25
25
25
25
25
Refrigerant Piping Guidelines. . . . . . . . . . . . . 14
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Refrigerant Piping Procedures (Outdoor
Units). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Electromechanical Controls. . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evaporator Fan (Indoor Supply
Air) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling Mode . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Piping Procedures (Indoor
Unit). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
System Evacuation. . . . . . . . . . . . . . . . . . . 16
4
Control Circuit Features . . . . . . . . . . . . . . . . . .
Discharge Temperature Limit
(DTL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Outdoor Ambient Cooling . . . . . . . .
Evaporator Defrost Control
(EDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Pressure Cut-Out (LPCO) . . . . . . . . .
High Pressure Cut-Out (HPCO) . . . . . . . .
Internal Overload Protector
(IOL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
26
26
26
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Insulating and Isolating Refrigerant
Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Monthly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Refrigerant Charging Procedure . . . . . . . . . . 17
Charging Levels. . . . . . . . . . . . . . . . . . . . . . 18
Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Tube and Fin. . . . . . . . . . . . . . . . . . . . . . . . . 27
Liquid Charging . . . . . . . . . . . . . . . . . . . . . . . . . 18
Maintenance Log . . . . . . . . . . . . . . . . . . . . . . . . 29
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 18
Unit Power Supply . . . . . . . . . . . . . . . . . . . 19
Wiring Diagram Matrix . . . . . . . . . . . . . . . . . . . . 30
Annually (Cooling Season) . . . . . . . . . . . . . . . 27
SS-SVX12E-EN
Model Number Description
Cooling Condenser
TTA
120
A
3
00
*
*
123
456
7
8
9 10
11
12
N o t e : 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.
D I G I T S 1 - 3 : Pr o d u c t Ty p e
TTA = Split System Cooling
DIGITS 4 - 6: No min al Gr oss Co olin g Capacity
(MBh)
090 = 7.5 Tons (60Hz)
120 = 10 Tons (60Hz)
180 = 15 Tons (60Hz)
240 = 20 Tons (60Hz)
A = Single Compressor, Single Circuit, R-22
B = Dual Compressor, Dual Circuit, R-22
DIGIT 8: Electrical Characteristics
3 = 208–230/60/3
4 = 460/60/3
D I G I T S 9 - 10 : F a c t o r y I n s t a l l e d O p t i o n s
00 = Packed Stock
D I G I T S 11 : M i n o r D e s i g n S e q u e n c e
* = Current Design Sequence1
D I GI TS 12 : Serv i c e D ig it
* = Current Design Sequence1
DIGIT 7: Major Develo pment Seq uence
1.
* = sequential alpha character
SS-SVX12E-EN
5
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.
I m p o rt a n t : 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.
I m p o rt a n t : Do not remove the VFD without first
contacting technical support! For
performance-related questions and
diagnostic support in North America call 1877-872-6363. 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
6
manual should remain weather-protected with the unit
until all installation procedures are complete.
N o t e : 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. 24 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 startup. 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.
SS-SVX12E-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
WA R N I N G
I m p r o p e r U n i t L i ft !
F a i l u r e t o p r o p e r l y l i ft u n i t c o u l d r e s u l t i n u n i t
dropping and possibly crushing operator/
t e ch n i c i a n w h i ch c o u l d r e s u l t i n d e a t h o r s e r i o u s
i n j u r y, a n d e q u i p m e n t o r p r o p e rt y- o n l y d a m a g e .
Te s t l i ft u n i t a p p r o x i m a t e l y 2 4 i n ch e s t o v e r i f y
p r o p e r c e n t e r o f g r a v i t y l i ft p o i n t . To a v o i d
d r o p p i n g o f u n i t , r e p o s i t i o n l i ft i n g p o i n t i f u n i t i s
not level.
N OT I C E
Equipment Damage!
Use spreader bar s to prevent straps from
d a m a g i n g t h e u n i t . I n s t a l l t h e b a r s b e t w e e n l i ft i n g
s t r a p s , b o t h u n d e r n e a t h t h e u n i t a n d a b ov e t h e
unit to prevent the straps from crushing the unit
cabinet or damaging the finish.
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. 13 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. 13). 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. 9 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. 9.
I m p o rt a n t : 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. 9).
SS-SVX12E-EN
7
Pre - In s ta l l a ti o n
Unit Mounting
WA R N I N G
Mounting Integrity!
Fai l ure t o fol l ow i ns tr uc ti on be l ow c ou ld r es ul t i n
death or serious injury or possible equipment or
p r o p e rt y- o n l y d a m a g e .
E n s u r e t h e r o o f s t r u c t u r e s u p p o rt s a r e s t r o n g
e n o u g h t o s u p p o rt t h e w e i g h t o f t h e u n i t a n d a n y
accessories.
Figure 1. Roof mounted unit
Ou td o o r Un it
Ga s (S u ctio n )
Lin e - In s u la te d
Liq u id Lin e
In s u la te d
Un it Mo u n tin g
Ch a n n e ls
6”
Ra d iu s
Ele va tio n
(Mo u n tin g Fra m e )
Structural Preparation
N OT I C E
Ro o f D a m a g e !
Sy s t e m c o n t a i n s o i l a n d r e f r i g e r a n t u n d e r h i g h
pressu re. Roof s shou ld b e pr otected fro m
exposure to oils and refrigerant in the system. If
r o o ft o p i s n o t p r o t e c t e d , d a m a g e t o t h e r o o f m a y
o c c u r.
I m p o rt a n t : 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. 13. The
unit should be elevated on a level, field fabricated fourinch 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.
8
Ro o f
Co n s tru ctio n
Ro o f Tru s s in g
Ce ilin g
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. 9).
SS-SVX12E-EN
Dimensional Data
Figure 2.
Height, width and depth measurements
H
H
W
D
W
D
H - in. (mm)
W - in. (mm)
D - in. (mm)
TTA090A
46.1 (1171)
45 (1143)
38 (965.2)
TTA120A
46.1 (1171)
55 (1397)
42 (1067)
TTA180B, 240B
52.1 (1323)
96 (2438)
48 (1219)
N o t e : Full dimensional data available on next pages.
SS-SVX12E-EN
9
Dimensional Data
Figure 3.
7.5 ton condensing unit, single compressor, tube and fin
SEE NOTE 3
NOTES :
1. ACCES S OP ENING IS FOR FIELD INS TALLED BAYLOAM ACCES S ORY.
2. MINIMUM CLEARANCE FOR P ROP ER OP ERATION IS 36" (914.4) FROM
W ALLS , S HRUBBERY, P RIVACY FENCES ETC. MINIMUM CLEARANCE
B ETWEEN ADJ ACENT UNITS IS 72" (1828.8). RECOMMENDED S ERVICE
C LEARANCE 48" (1219. 2)
3. TOP DIS CHARGE AREA S HOULD BE UNRES TRICTED FOR 100" (2540)
MINIMUM. UNIT S HOULD BE P LACED S O ROOF RUN-OFF WATER DOES
NOT P OUR DIRECTLY ON UNIT
4. OUTDOOR AIR TEMP ERATURE S ENS OR OP ENING (DO NOT BLOCK OP ENING)
SERVICE PANEL
SEE NOTE 4
HAIL GUARD
(OP TIONAL)
S ERVICE CLEARANCE
48" (1219.2) (S EE NOTE 2
FOR CLEARANCE)
HAIL GUARD
(OP TIONAL)
S EE NOTE 1
35 15/1 6"
(912 .8)
WITH HAIL GUARD
33 7/8"
(86 0.4)
LINE VOLTAGE
CONT ROL WIRING
REFRIGERANT ACCES S
39 3/16"
(995.3)
SER VICE P ANEL
34 1/8" (866.8)
26 15/16"
(684.2)
29 13/16"
(757.2)
16 7/16"
(417.5)
14 3/8"
(365.1)
1/16"
(1.59)
7 15/16"
(201.6)
6" (152.4)
6" (152.4)
SUCTION LINE
1 7/8"
(47.6)
21 11 /16"
(55 0.9)
LIQUID LINE
2 7/8"
(73)
33 13/1 6"
(858 .8)
40 15/16"
(1039.8)
41 15/16"
(1065. 2)
WITH HAIL GUARD
SERVIC E P ANEL S IDE
3" (76. 2)
40 3/4"
(1035) 34 3/4"
(882.6)
7/16" (11.11) DIA. IS OLATOR MOUNTING
HOLES (OUTS IDE HOLES - 4 P LACES )
BOTTOM
OF UNIT
4 3/16"
(106.36)
1 13/16"
(46)
10
27 11/ 16"
(703.3 )
2 5/16"
(58.7)
SS-SVX12E-EN
Dimensional Data
Figure 4.
10 ton condensing unit, single compressor, tube and fin
SEE NOTE 3
NOTES :
1. ACCES S OP ENING IS FOR FIELD INS TALLED BAYLOAM ACCES S ORY.
2. MINIMUM CLEARANCE FOR P ROP ER OP ERATION IS 36" (914.4) FROM
WALLS , S HRUBBERY, P RIVACY FENCES ETC. MINIMUM CLEARANCE
B ETWEEN ADJ ACENT UNITS IS 72" (1828.8). RECOMMENDED S ERVICE
C LEARANCE 48" (1219.2)
3. TOP DIS CHARGE AREA S HOULD BE UNRES TRICTED FOR 100" (2540)
MINIMUM. UNIT S HOULD BE P LACED S O ROOF RUN-OFF WATER DOES
NOT P OUR DIRECTLY ON UNIT
4. OUTDOOR AIR TEMP ERATURE S ENS OR OP ENING (DO NOT BLOCK OP ENING)
SERVICE PANEL
HAIL GUARD
(OP TIONAL)
SEE NOTE 4
S ERVICE CLEARANCE
48" (1219.2) (S EE NOTE 2
FOR CLEARANCE
S EE NOTE 1
4 1/4"
(108)
HAIL GUARD
(OP TIONAL)
39 15 /16"
(1014 .4)
WITH HAIL GUARD
1 1/4"
(31.7)
REFRIGERANT ACCES S
37 15/1 6"
(963 .6)
LINE VOLTAGE
CONTROL WIRING
39 1/8"
(993.8)
SER VICE P ANEL
34 1/16" (865.2)
29 3/4"
(755.6)
26 7/8"
(682.6)
14 5/16"
(363.5)
7 1/2" 8 1/4"
(190.5) (209.5)
1/16"
(1.6)
SUCTION LINE
25 11/1 6"
(652 .5)
6"
(152. 4)
1 15/16" (49.2)
LIQUID LINE
4 15/16"
(125.4)
6"
(152. 4)
1 7/8"
(47.6)
2 7/8" (73)
50 15/16"
(1294)
51 15/16"
(1319.2)
WITH HAIL GUARD
37 11/1 6"
(957 .3)
SERVICE P ANEL S IDE
7/16" (11.1) DIA. IS OLATOR MOUNTING
HOLES (OUTS IDE HOLES - 4 P LACES )
3" (76. 2)
50 3/4"
(1289)
44 3/4"
(1136.6)
BOTTOM
OF UNIT
3 13/16"
(96.8)
2 3/16"
(55.6)
SS-SVX12E-EN
31 11/1 6"
(804.9)
1 11/16"
(42.9)
11
Dimensional Data
Figure 5.
15-20 ton condensing unit, dual compressor, tube and fin
SEE NOTE 2
NOTES :
1. MINIMUM CLEARANCE FOR P ROP ER OP ERATION IS 36" (914.4) FROM
WALLS , S HRUBBERY, P RIVACY FENCES ETC. MINIMUM CLEARANCE
B ETWEEN ADJ ACENT UNITS IS 72" (1828.8). RECOMMENDED S ERVICE
C LEARANCE 48" (1219.2)
2. TOP DIS CHARGE AREA S HOULD BE UNRES TRICTED FOR 100" (2540)
MINIMUM. UNIT S HOULD BE P LACED S O ROOF RUN-OFF WATER DOES
NOT P OUR DIRECTLY ON UNIT
3. OUTDOOR AIR TEMP ERATURE S ENS OR OP ENING (DO NOT BLOCK OP ENING)
HAIL GUARD
(OP TIONAL)
SEE NOTE 3
S ERVICE CLEARANCE
48" (1219.2) (S EE NOTE 1
FOR CLEARANCE)
SERVICE PANEL
DETAIL A
46"
(1168.4)
WITH HAIL GUARD
95 7/16"
(2424)
WITH HAIL GUARD
41 7/16"
(1052.5)
44"
(1117. 6)
HAIL GUARD
(OP TIONAL)
HAIL GUARD
(OP TIONAL)
45 1/8"
(1146.2)
SER VICE
P ANEL
3 3/8"
(85.7)
6 5/8"
(168.3)
1/16"
(1.6)
3/16"
(4.8)
41 3/8"
(1051)
9"
(228.6)
93 5/16"
(2370.1)
25 11/16"
(652.5)
9"
(228. 6)
9 1/4" (235)
6 13/16" (173)
1 3/16" (30.2)
7/16" (11.1) DIA. ISOLATOR MOUNTING
HOLES (OUTS IDE HOLES - 4 P LACES )
LINE VOLTAGE
CONTROL
WIRING
SERVICE PANEL SIDE
S UCTION LINE
REFRIGERANT ACCES S
39 7/8"
(1012.8)
BOTTOM OF UNIT
36 7/8"
(936.6)
3" (76. 2)
87"
(2210)
93"
(2362.2)
2 3/16" 6 13/16"
(55.6) (173)
41 1/ 2"
(105 4)
41 5/8"
(1057.3)
18 3/4"
(476.2) 14 5/8"
(371.5)
12 9/16"
(319.1)
5 9/16"
4 3/8"
(141.3)
(111.1)
S UCTION LINE
LIQUID LINES
6 5/16" (160.3)
3 11/16" (93.7)
15/16" (23.8)
FRO NT DETAIL A
DIMENS IONAL DETAIL
12
SS-SVX12E-EN
Weights
Cooling Condenser
Table 1.
Tons
TTA unit and corner weights — lbs (60 Hz)
Model No.
Shipping
Max (lbs)
Net Max
(lbs)
Corner Weights
1
2
3
4
7.5
TTA090A
367
298
84
89
44
81
10
TTA120A
471
395
133
103
70
89
15
TTA180B
875
723
207
204
151
161
20
TTA240B
995
837
262
240
164
171
Figure 6. TTA090A, 120A
Figure 7. TTA180B, 240B
#4
#3
#4
#1
#1
#3
#2
S ER
AC C VIC E
ES S
LIFTING HOLES
(BOTH SIDES)
SS-SVX12E-EN
#2
S ER
AC C VIC E
ES S
S ER
AC C VIC E
ES S
LIFTING HOLES
(BOTH S IDES )
13
Installation
Refrigerant Piping Guidelines
Figure 8.
Allowable elevation difference: TTA above indoor unit
Contact m anufacturer for review
Figure 9.
Allowable elevation difference: TTA or TWA below indoor unit
Contact m anufacturer for review
Accep tab le liq uid -riser heig ht
b ased on total liq uid -line len g th
(b elow ind oor unit)
N o t e : Route refrigerant piping for minimum linear length, minimum number of bends and fittings (no reducers) and
minimum amount of line exposed to outdoor ambients.
14
SS-SVX12E-EN
Installation
Refrigerant Piping Procedures
(Outdoor Units)
WA R N I N G
Re f r i g e r a n t u n de r H i g h Pr e s s u r e !
Fai l ure t o fol l ow i ns tr uc ti on s be l ow c ou ld re s ul t in
a n e x p l o s i o n w h i ch c o u l d r e s u l t i n d e a t h o r s e r i o u s
injury or equipment damage.
Sy s t e m c o n t a i n s o i l a n d r e f r i g e r a n t u n d e r h i g h
pre ssu re . Recove r r ef ri ge ra nt to re li e ve pre ssu re
befor e op en in g t he system. See u nit namep late for
re fri ge ra nt ty pe . Do no t u se non -a pp rove d
refrigerants, refrigerant substitutes, or refrigerant
additi ves.
Each 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. 15) line up properly with the
holes in the unit cabinet.
Figure 10.
nitrogen)
Outdoor units - refrigerant piping (with dry
N OT I C E
Syste m Component Dam age!
Do no t remov e th e sea l ca ps f rom re fr ig era nt
connections, or open the service valves until
p r ep ar ed t o b r a ze r e f r ig er an t li n e s t o t h e
connections. Excessi ve exposure to atmosphere (>
5 m i n . ) m a y a l l o w m o i s t u r e o r d i rt t o c o n t a m i n a t e
the system, damaging valve seals and causing ice
formation in system components.
WA R N I N G
Hazard of Explosion and Deadly
Gases!
Fa il u re to f ol lo w a ll pro pe r s af e re fr ig era nt
handling practices could result in death or serious
i n j u r y.
N e v e r s o l d e r, b r a ze o r w e l d o n r e f r i g e r a n t l i n e s o r
a ny uni t comp one nt s th at a re a bov e a tmosp he ric
pressure or where refrigerant may be present.
A l way s re m ove re fri ge ra nt by fol l ow in g t he
g u i d e l i n e s e s t a b l i s h e d b y t h e E PA F e d e r a l C l e a n
Air Act o r o ther st at e or local codes as app rop riate.
A ft e r r e f r i g e r a n t r e m o v a l , u s e d r y n i t r o g e n t o
b r i n g s y s t e m b a ck t o a t m o s p h e r i c p r e s s u r e b e f o r e
opening system for repair s. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessi ve heat from
soldering, brazing or welding with refrigerant
v a p o r s p r e s e n t c a n f o r m h i g h l y t ox i c ga s e s a n d
e x t r e m e l y c o rr o s i v e a c i d s .
4. Cut, fit and braze tubing, starting at the outdoor unit
and work toward the indoor unit. See
recommended tube sizes, .
N o t e : 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. 15.
N OT I C E
Syste m Component Dam age!
3. Remove the refrigerant connection seal caps and
open the service valve slowly to release the
nitrogen from the unit.
Install a regulating valve between the nitrogen
s o u r c e a n d t h e ga u g e m a n i f o l d . U n r e g u l a t e d
pressure can damage system components.
N OT I C E
Syste m Component Dam age!
We t - w r a p a l l v a l v e s a n d p r o t e c t p a i n t e d s u r f a c e s
from excessi ve heat. Heat can damage system
components and the unit finish.
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.
SS-SVX12E-EN
15
Installation
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.
N OT I C E
Unit Damage!
Do n ot a ppl y h ea t to re move se al ca ps un ti l th e
ga u g e p o rt c o r e s h a v e b e e n r e m o v e d . I f s e a l c a p s
are intact, application of heat may generate
excessi ve pressure in the unit and result in
damage to the coil or expansion valve.
1. Remove both seal caps from the indoor unit
connection stubs.
N OT I C E
Unit Damage!
Do n ot re move the se a l cap s fr om r ef ri ge ra nt
connections, or open the service valves until
prepared to braze refrigerant lines to the
connections.
WA R N I N G
Hazard of Explosion!
Fa il u re to f ol lo w re co m m en de d s af e le a k te s t
procedures could result in death or serious injury
o r e q u i p m e n t o r p r o p e rt y- o n l y - d a m a g e .
N e v e r u s e a n o p e n f l a m e t o d e t e c t ga s l e a k s . U s e a
leak test solution for leak testing.
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 leakchecking 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.
N o t e : 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.
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
WA R N I N G
Hazard of Explosion!
Fai l ure t o fol l ow t he se rec o m m en da ti ons c oul d
result in death or serious injury or equipment or
p r o p e rt y- o n l y d a m a g e .
Use only dry nitrogen with a pressure regulator for
pre ssu ri zin g uni t. Do n ot use a ce ty le ne , ox yg en or
compressed air or mixtures containing them for
pressure testing. Do not use mixtures of a
hy d r o g e n c o n t a i n i n g r e f r i g e r a n t a n d a i r a b ov e
atmospheric pressure for pressure testing as they
may become flammable and could result in an
e x p l o s i o n . Re f r i g e r a n t , w h e n u s e d a s a t r a c e ga s
should only be mixed with dry nitrogen for
pressurizing units.
3. Attach center hose of manifold gauges to vacuum
pump.
N OT I C E
O p e r a t i n g U n d e r Va c u u m !
Fa il u re to f ol lo w the s e i ns tr uc ti ons wi l l re s ul t in
compressor failure.
Do not operate or apply power to the compressor
while under a vacuum.
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.
N OT I C E
Equipment Damage!
C h a r g e w i t h a c c e s s p o rt o n t h e l i q u i d l i n e s e r v i c e
v a l v e o n l y.
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
16
SS-SVX12E-EN
Installation
refrigerant charging hoses from liquid and gas
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.
Refrigerant Charging Procedure
If charging by weight, refer to for starting change. If
refrigerant adjustments are needed because of length
of line, refer to “Charging Charts and Superheat,” p. 23.
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.
Notes:
•
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.
23, then re-check charging charts to
determine if charge corrections are
necessary.
I m p o rt a n t :
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.
N OT I C E
N OT I C E
Equipment Damage!
N e v e r ch a r g e l i q u i d r e f r i g e r a n t i n t o t h e s u c t i o n
l i n e o f t h e u n i t w i t h t h e c o m p r e s s o r o ff.
Figure 11. Outdoor units - refrigerant piping
Equipment Damage!
T h i s i s P O E o i l , w h i ch r e a d i l y a b s o r b s m o i s t u r e .
A lwa ys us e ne w oi l a nd n ev e r l e av e c on ta in er s
open to atmosphere while not in use.
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.
SS-SVX12E-EN
17
Installation
Charging Levels
Table 3.
Estimated charge levels at ARI rated line lengths (25 feet)
Refrigerant Charge
Matched Set
Circuit 1
Circuit 2
Liquid LineDiameter
Vapor LineDiameter
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.
N o t e : 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. 9 for specific locations.
WA R N I N G
Li ve Electrical Components!
Fai l ure t o fol l ow al l e le c tr ic a l s af et y pr ec a uti on s
when exposed to li ve electrical components could
r e s u l t i n d e a t h o r s e r i o u s i n j u r y.
When it is necessary to work with li ve electrical
components, have a qualified licensed electrician
or other indi vidual who has been properly trained
in handling li ve electrical components perform
these tasks.
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.
23. Add or remove refrigerant (liquid only) as
required to obtain correct discharge pressure and
liquid temperature.
3. Check suction line superheat and condenser subcooling to ensure the unit is operating properly.
4. Disconnect all power to the unit.
I m p o rt a n t : 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).
18
Per Circuit
WA R N I N G
H a z a r d o u s Vo l t a g e w / C a p a c i t o r s !
F a i l u r e t o d i s c o n n e c t p o w e r a n d d i s ch a r g e
capacitor s before servicing could result in death or
s e r i o u s i n j u r y.
D i s c o n n e c t a l l e l e c t r i c p o w e r, i n c l u d i n g r e m o t e
d i s c o n n e c t s a n d d i s ch a r g e a l l m o t o r s t a rt / r u n
c a p a c i t o r s b e f o r e s e r v i c i n g . F o l l o w p r o p e r l o ck o u t /
tagout procedures to ensure the power cannot be
i n a d v e rt e n t l y e n e r g i z e d . F o r v a r i a b l e f r e q u e n c y
dri ves or other energy storing components
p r ov i d e d b y Tr a n e o r o t h e r s , r e f e r t o t h e
a p p r o p r i a t e m a n u f a c t u r e r ’s l i t e r a t u r e f o r
a l l o w a b l e w a i t i n g p e r i o d s f o r d i s ch a r g e o f
c a p a c i t o r s . Ve r i f y w i t h a n a p p r o p r i a t e v o l t m e t e r
t h a t a l l c a p a c i t o r s h a v e d i s ch a r g e d .
Fo r a dd it io na l i nfo rm a ti on re gar di ng th e s af e
d i s ch a r g e o f c a p a c i t o r s , s e e P R O D - S V B 0 6 A - E N .
5. Remove the charging system from the unit.
6. Replace all panels.
Electrical Wiring
WA R N I N G
Prope r Field Wiring a nd Grounding
Required!
Fa il u re to f ol lo w c ode c o ul d r es u lt i n de at h or
s e r i o u s i n j u r y.
All field w ir in g MUST be p er for med b y qualif ied
per sonnel. Improperly installed and grounded
field wiring poses FIRE and ELECTROCUTION
h a z a r d s . To a v o i d t h e s e h a z a r d s , y o u M U S T f o l l o w
requirements for field wiring installation and
grounding as described in NEC and your local/
state electrical codes.
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. 9. Determine proper wire sizes
and unit protective fusing requirements by referring to
the unit nameplate and/or the unit Service Facts. Field
SS-SVX12E-EN
Installation
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.
I m p o rt a n t : All wiring must comply with applicable
local and national (NEC) codes. Type and
location of disconnect switches must
comply with all applicable codes.
WA R N I N G
Pr o p e r F i e l d W i r i n g a n d G r o u n d i n g
Re q u i r e d!
Fai l ure t o fol l ow c od e c oul d re s ul t in d ea th o r
s e r i o u s i n j u r y.
A l l f i e l d w i r i n g M U ST b e p e r f o r m e d b y q u a l i f i e d
per sonnel. Improperly installed and grounded
field wiring poses FIRE and ELECTROCUTION
h a z a r d s . To a v o i d t h e s e h a z a r d s , y o u M U ST f o l l o w
requirements for field wiring installation and
grounding as described in NEC and your local/
state electrical codes.
corresponding thermostat installation instructions.
Install color-coded, weather-proof, multi-wire cable
according to the field wiring schematics (see “Field
Wiring,” p. 20).
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.
N o t e : 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.
I m p o rt a n t : For the EDC switch to be functional and
thereby facilitate reliable unit operation,
make the EDC connections from the indoor
to the outdoor control boxes.
Figure 12.
B
T’s t a t
C
D
Use Copper Conductor s Only!
Low Voltage Wiring
Air Handler
Electric
Heat Accessory
N OT I C E
Fai l ure t o us e c op pe r c o ndu ct or s c o ul d r es ul t i n
equipment damage as unit terminals are not
designed to accept other types of conductors.
Electromechanical jobsite connections
Disconnect S witch
(By Others)
A
A.
B.
C.
D.
B
Disconnect S witch
(By Others) Note 2
Disconnect S witch
(By Others)
3 power wires, line voltage for 3 phase, (2 power wires for
single phase)
3 power wires, line voltage for 3 phase, (2 power wires for
single phase)
Cooling only thermostat: 3 to 7 wires depending on stages of
electric heat
3 to 7 wires depending on type of outdoor unit(s)
Mount the indoor thermostat, zone sensor, or Night
Setback Panel (NSB) in accordance with the
SS-SVX12E-EN
19
Installation
Field Wiring
Figure 13.
20
Thermostat wiring for electromechanical units
SS-SVX12E-EN
Installation
Refrigerant Circuit
Figure 14.
Typical split system cooling refrigerant circuit
COOLING ONLY CIRCUIT DIAGRAM
DISCHARGE
TEMPERATURE
LIMIT (DTL)
GAUGE
CONNECTION
HIGH PRESSURE
SWITCH (HPCO)
NOTE A
D
NOTE A
FIELD SUPPLIED
INTER-CONNECTING
TUBING
S
COMPRESSOR
EQUALIZER
TUBE
AIR
OUTDOOR COIL
EXPANSION
VALVE BULB
GAUGE
CONNECTION
SERVICE
VALVE
NOTE A
AIR
V
TXV
INDOOR COIL
LOW PRESSURE
SWITCH (LPCO)
SERVICE
VALVE
V
SUB-COOLING CIRCUIT
INDICATES DIRECTION OF
REFRIGERANT FLOW
FILTER DRIER
NOTE A
NOTE A: ONLY ONE OUTDOOR AND INDOOR
COIL REFRIGERANT ENTRY AND
EXIT CIRCUIT IS SHOWN. ALL
MODELS HAVE MULTIPLE ENTRY
AND EXIT CIRCUITS.
NOTE B: DUAL CIRCUIT MODELS HAVE 2
REFRIGERATION CIRCUITS.
SS-SVX12E-EN
21
Electrical Data
Table 4.
Electrical characteristics — compressor and condenser fan motors — 60 Hz
Compressor Motor
Tons
Unit Model
Number
7.5
10
15
20
Condenser Fan Motor
Amps
No.
TTA090A3
1
TTA090A4
TTA120A3
TTA120A4
TTA180B3
TTA180B4
TTA240B3
TTA240B4
Volts
Phase
RLA
LRA
(Ea.)
(Ea.)
Amps
No.
208-230
3
22.4
164
1
1
460
3
10.9
100
1
208-230
3
30.1
225
1
460
3
15.5
114
2
208-230
3
22.4
164
2
460
3
10.9
100
2
208-230
3
30.1
225
2
460
3
15.5
114
Volts
Phase
FLA
LRA
(Ea.)
(Ea.)
8.1
208-230
1
3.1
1
460
1
1.6
3.8
1
208-230
1
5.0
14.4
1
460
1
2.5
5.8
2
208-230
2
5.0
14.4
2
460
2
2.5
5.8
2
208-230
2
5.0
14.4
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.
Tons
7.5
10
15
20
Unit wiring — condensing units — 60 Hz
Unit Model
Number
Unit Operating
Voltage Range
Minimum Circuit
Ampacity
Maximum Fuse or HACR
Circuit Breaker Size
45
TTA090A3
187-253
31.1
TTA090A4
414-506
15.2
25
TTA120A3
187-253
42.6
60
TTA120A4
414-506
21.9
30
TTA180B3
187-253
60.4
80
TTA180B4
414-506
29.5
40
TTA240B3
187-253
77.7
100
TTA240B4
414-506
39.9
50
Note: HACR type circuit breaker per NEC.
22
SS-SVX12E-EN
Charging Charts and Superheat
Figure 15.
TTA090A charging curve
Figure 17. TTA180B charging curve
TTA090A Ch a rg in g Cu rve
425
425
400
400
375
375
350
350
Re m o ve
c h a rg e
325
Dis c h a rg e P re s s u re , p s ig
Dis c h a rg e P re s s u re , p s ig
TTA180B Ch a rg ing Cu rve
300
275
250
225
Ad d c h a rg e
Re m o ve
c h a rg e
325
300
275
250
225
200
200
175
175
150
150
Ad d c h a rg e
125
125
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
55
60
65
70
75
80
Figure 16.
TTA120A charging curve
90
95
100
105
110
115
120
125
130
135
140
125
130
135
140
Figure 18. TTA240B charging curve
TTA120A Ch a rg in g Cu rve
TTA240B Ch a rg ing Cu rve
425
425
400
400
375
375
350
350
Re m o ve
c h a rg e
325
Dis c h a rg e P re s s u re , p s ig
Dis c h a rg e P re s s u re , p s ig
85
Liq u id Te mp e ra tu re Le a vin g OD Co il, °F
Liq u id Te m p e ra tu re Le a vin g OD Co il, °F
300
275
250
225
Ad d c h a rg e
Re m o ve
c h a rg e
325
300
275
250
225
200
200
175
175
150
150
Ad d c h a rg e
125
125
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
55
60
65
70
Table 6.
75
80
85
90
95
100
105
110
115
120
Liq u id Te mp e ra tu re Le a vin g OD Co il, °F
Liq u id Te m p e ra tu re Le a vin g OD Co il, °F
TTA superheat with matched TWE air handler
Cooling Superheat
Condenser
Air Handler
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-SVX12E-EN
23
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 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?
Insulated the entire suction line?
24
SS-SVX12E-EN
Pre-Start
Control Circuit Features
N o t e : 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
SS-SVX12E-EN
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.
WA R N I N G
Prevent Injury!
D u e t o a g e n c y s a f e t y r e q u i r e m e n t s , n o s ch r a d e r
c o r e i s t o b e i n s t a l l e d b e n e a t h t h e H P C O. R e m o v a l
o f t h e H P C O w i t h o u t e v a c u a t i n g t h e s y s t e m ch a r g e
could cause injury and release of refrigerant.
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.
N o t e : 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.
25
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 H E AT, C O O L or A U TO. The system should
operate normally.
N OT I C E
Equipment Damage!
Ensure the disconnect for the indoor air handler is
closed before operating the system. Operating the
o u t d o o r u n i t w i t h o u t t h e i n d o o r f a n e n e r g i ze d ca n
cause unit trip-out on high pressure control and/or
l i q u i d f l o o d b a ck t o t h e c o m p r e s s o r.
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 H E AT or C O O L position, unit
operation is automatic. The optional automatic
changeover thermostat, when in the A U TO position,
automatically changes to heat or cool with sufficient
room temperature change.
Evaporator Fan (Indoor Supply Air)
positioned at A U TO 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
A U TO, fan operation coincides with the heating run
cycles. When the fan switch is positioned at O N , fan
operation is continuous.
Cooling Mode
With the disconnect switch in the O N 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 “O ff”
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
C O O L and the fan switch is at A U TO, 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.
The evaporator fan is controlled by an O N / A U TO
switch on the room thermostat. With the switch
26
SS-SVX12E-EN
Maintenance
WA R N I N G
Remove any accumulation of dust and/or dirt from
the unit casing.
H a z a r d o u s Vo l t a g e w / C a p a c i t o r s !
F a i l u r e t o d i s c o n n e c t p o w e r a n d d i s ch a r g e
capacitor s before servicing could result in death or
s e r i o u s i n j u r y.
D i s c o n n e c t a l l e l e c t r i c p o w e r, i n c l u d i n g r e m o t e
d i s c o n n e c t s a n d d i s ch a r g e a l l m o t o r s t a rt / r u n
c a p a c i t o r s b e f o r e s e r v i c i n g . F o l l o w p r o p e r l o ck o u t /
tagout procedures to ensure the power cannot be
i n a d v e rt e n t l y e n e r g i z e d . F o r v a r i a b l e f r e q u e n c y
dri ves or other energy storing components
p r o v i d e d b y Tr a n e o r o t h e r s , r e f e r t o t h e
a p p r o p r i a t e m a n u f a c t u r e r ’s l i t e r a t u r e f o r
a l l o w a b l e w a i t i n g p e r i o d s f o r d i s ch a r g e o f
c a p a c i t o r s . Ve r i f y w i t h a n a p p r o p r i a t e v o l t m e t e r
t h a t a l l c a p a c i t o r s h a v e d i s ch a r g e d .
For ad di ti on al i n for m at io n rega rdi ng t he s a fe
d i s ch a r g e o f c a p a c i t o r s , s e e P R O D - S V B 0 6 A - E N .
N OT I C E
O p e r a t i n g U n d e r Va c u u m !
Fai l ure t o fol l ow t he se in st ruc t io ns w il l r es ul t i n
compressor failure.
Do not operate or apply power to the compressor
while under a vacuum.
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. 29.
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.
N o t e : 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 cleaningenhances 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.
Tube and Fin
N o t e : 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.
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. 29.
SS-SVX12E-EN
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
27
Maintenance
in Step 1; then restore power to the unit.
inadvertently bent during the cleaning process.
10. Using a fin comb, straighten any coil fins that were
28
SS-SVX12E-EN
SS-SVX12E-EN
Dry
Bulb
Wet
Bulb
(C1)
(C2)
Suction Pressure
(C1)
(C2)
Discharge Pressure
Compressor
Note: Perform each inspection once per month (during cooling season) while unit is operating
Date
Ambient
Temp.
(°F)
Evaporator Entering Air
Circuit #1
Circuit #2
Superheat (°F)
(at compressor)
Circuit #1
Circuit #2
Subcooling (°F)
(at service valve)
Maintenance
Maintenance Log
29
Wiring Diagram Matrix
Table 7. Wiring schematics R-22 cooling
Schematics
Connection Diagrams
Electromechanical
Electromechanical
12131760
12131511
3
12131760
12131511
60
3
12131760
12131511
460
60
3
12131760
12131511
Dual
208-230
60
3
12131760
12131762
15
Dual
460
60
3
12131760
12131762
TTA240B3
20
Dual
208-230
60
3
12131761
12131763
TTA240B4
20
Dual
460
60
3
12131760
12131762
Refrigerant
Voltage Hz Ph
Circuit
Model
Number
Ton
TTA090A3
8
Single
208-230
60
3
TTA090A4
8
Single
460
60
TTA120A3
10
Single
208-230
TTA120A4
10
Single
TTA180B3
15
TTA180B4
Note: Wiring diagrams are available through e-Library or by contacting your local sales office.
30
SS-SVX12E-EN
Notes
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.
©2016 Trane
All rights reserved
SS-SVX12E-EN 29 Jan 2016
Supersedes SS-SVX12D-EN
We are committed to using environmentally
(August 2015)
conscious print practices that reduce waste.