Page 1
18-AC95D1-1
Installer’s Guide
Condensing Units
4TTX8
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information pack upon completion of work.
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture’s split
systems are A.H.R.I. rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and
outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability.
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations..............................................3
Section 3. Unit Preparation .................................................................... 5
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 6
Section 6. Refrigerant Line Routing .....................................................7
Section 7. Refrigerant Line Brazing ...................................................... 8
Section 8. Refrigerant Line Leak Check .............................................10
Section 9. Evacuation ...........................................................................11
Section 10. Service Valves ................................................................... 11
Section 11. Electrical - Low Voltage .................................................... 13
Section 12. Electrical - High Voltage ................................................... 16
Section 13. Start Up ..............................................................................17
Section 14. System Charge Adjustment ............................................. 18
Section 15. Checkout Procedures and Troubleshooting ................... 22
Page 2
Section 1. Safety
▲
WARNING
!
▲
WARNING
!
▲
WARNING
!
▲
WARNING
!
▲
CAUTION
!
▲
CAUTION
!
▲
WARNING
!
This information is intended for use by individuals
possessing adequate backgrounds of electrical and
mechanical experience. Any attempt to repair a central
air conditioning product may result in personal injury
and/or property damage. The manufacture or seller
cannot be responsible for the interpretation of this
information, nor can it assume any liability in connection with its use.
These units use R-410A refrigerant which operates
at 50 to 70% higher pressures than R-22. Use only
R-410A approved service equipment. Refrigerant cylinders are painted a “Rose” color to indicate the type
of refrigerant and may contain a “dip” tube to allow
for charging of liquid refrigerant into the system. All
R-410A systems use a POE oil that readily absorbs
moisture from the atmosphere. To limit this “hygroscopic” action, the system should remain sealed
whenever possible. If a system has been open to the
atmosphere for more than 4 hours, the compressor oil
must be replaced. Never break a vacuum with air and
always change the driers when opening the system
for component replacement. For specific handling
concerns with R-410A and POE oil reference Retrofit
Bulletins SS-APG006-EN and APP-APG011-EN.
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and troubleshooting of this product, it may be necessary to work
with live electrical components. Failure to follow all
electrical safety precautions when exposed to live
electrical components could result in death or serious
injury.
If using existing refrigerant lines make certain that all
joints are brazed, not soldered.
Scroll compressor dome temperatures may be hot. Do
not touch the top of compressor; it may cause minor to
severe burning.
UNIT CONTAINS R-410A REFRIGERANT!
R-410A operating pressures exceed the limit of R-22.
Proper service equipment is required. Failure to use
proper service tools may result in equipment damage
or personal injury.
SERVICE
USE ONLY R-410A REFRIGERANT AND AP-
PROVED POE COMPRESSOR OIL.
Extreme caution should be exercised when opening
the Liquid Line Service Valve. Turn counterclockwise
until the valve stem just touches the rolled edge. No
torque is required. Failure to follow this warning will
result in abrupt release of system charge and may
result in personal injury and /or property damage.
2 18-AC95D1-1
Page 3
Section 2. Unit Location Considerations
D
H
W
2.1 Unit Dimensions and Weight
Table 2.1
Unit Dimensions and Weight
Models H x D x W (in)
4TTX8024A
4TTX8036A
4TTX8048A
4TTX8060A
* Weight values are estimated.
50 x 34 x 37 261
54 x 34 x 37 266
54 x 34 x 37 274
54 x 34 x 37 295
When mounting the outdoor unit on a roof, be
sure the roof will support the unit’s weight.
Properly selected isolation is recommended to
alleviate sound or vibration transmission to the
building structure.
Please refer to application bulletin APPAPG013-EN for detailed mounting information.
2.2 Refrigerant Piping Limits
Weight* (lb)
1. The maximum length of refrigerant lines
from outdoor to indoor unit should NOT
exceed sixty (60) feet.
2. The maximum vertical change should not
exceed twenty five (25) feet*.
3. Service valve connection diameters are
shown in Table 5.1.
Note: For line lengths greater than sixty (60)
feet, Refer to Refrigerant Piping Application
Guide, SS-APG006-EN or Refrigerant Piping
Software Program, 32-3312-03 (or latest revision).
Standard
Line Set
60’ Max
Line Length
25’
*
Max
Line
Lift
35’ Max
Line
Length
*
Restricted to maximum vertical change of 25 ft.
18-AC95D1-1 3
25’
Max
Line
Lift
*
35’ Max
Line
Length
Page 4
Avoid Install
2.3 Suggested Locations for Best Reliability
Ensure the top discharge area is unrestricted for
at least five (5) feet above the unit.
Three (3) feet clearance must be provided in
front of the control box (access panels) and any
other side requiring service.
Do not locate close to bedrooms as operational
sounds may be objectionable.
Position the outdoor unit a minimum of 12” from
any wall or surrounding shrubbery to ensure
adequate airflow.
Outdoor unit location must be far enough away
from any structure to prevent excess roof runoff
water from falling directly on the unit.
Near Bedrooms
Min. 12” to
Shrubbery
Min. 12” to
Shrubbery
Min 5’ Unrestricted
Min 3’
Unrestricted
Access Panel
Min. 12”
to Wall
2.4 Coastal Considerations
If installed within one mile of salt water, including seacoasts and inland waterways, models without factory
supplied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time. Please
refer to Application Guide SS-APB006-EN: Trane - Sea Coast Applications and Seascoast Corrosion Protection
Bulletin UN-SVB11A-EN.
4 18-AC95D1-1
Page 5
Section 3. Unit Preparation
3.1 Prepare The Unit For Installation
STEP 1 - Check for damage and report prompt-
ly to the carrier any damage found to the unit.
STEP 2 - To remove the unit from the pallet,
remove tabs by cutting with a sharp tool.
Section 4. Setting the Unit
4.1 Pad Installation
When installing the unit on a support pad, such
as a concrete slab, consider the following:
• The pad should be at least 1” larger than the
unit on all sides.
• The pad must be separate from any structure.
• The pad must be level.
• The pad should be high enough above grade
to allow for drainage.
• The pad location must comply with National,
State, and Local codes.
For other applications refer to Application Guide
APP-APG013-EN.
18-AC95D1-1 5
Page 6
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
Table 5.1
Line Sizes Service Valve Connection Sizes
Model
4TTX8024A
4TTX8036A
4TTX8048A
4TTX8060A
Vapor
Line
5/8 3/8 5/8 3/8
3/4 3/8 3/4 3/8
7/8 3/8 7/8 3/8
1-1/8 3/8 1-1/8 3/8
5.2 Factory Charge
Trane outdoor condensing units are factory charged with the system charge required for the outdoor condensing
unit, fifteen (15) feet of tested connecting line, and the smallest indoor evaporative coil match. If connecting line
length exceeds fifteen (15) feet and/or a larger indoor evaporative coil is installed, then final refrigerant
charge adjustment is necessary.
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
5.3 Required Refrigerant Line Length
Determine required line length and lift. You will
need this later in STEP 2 of Section 14.
Total Line Length = __________ Ft.
Total Vertical Change (lift) = __________ Ft.
5.4 Refrigerant Line Insulation
Important: The Vapor Line must always be
insulated. DO NOT allow the Liquid Line and
Vapor Line to come in direct (metal to metal)
contact.
Liquid Line
Line Length
Vapor Line
Insulation
6 18-AC95D1-1
Page 7
5.5 Reuse Existing Refrigerant Lines
▲
CAUTION
!
If using existing refrigerant lines make certain that
all joints are brazed, not soldered.
For retrofit applications, where the existing
indoor evaporator coil and/or refrigerant lines
will be used, the following precautions should
be taken:
• Ensure that the indoor evaporator coil and
refrigerant lines are the correct size.
• Ensure that the refrigerant lines are free of
leaks, acid, and oil.
Important: For more information see publication numbers SS-APG006-EN and APPAPG011-EN.
Section 6. Refrigerant Line Routing
6.1 Precautions
Important: Take precautions to prevent noise
within the building structure due to vibration
transmission from the refrigerant lines.
For Example:
• When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type
hangers.
• Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings.
• Where the refrigerant lines run through a wall or sill, they should be insulated and isolated.
• Isolate the lines from all ductwork.
• Minimize the number of 90º turns.
8 Feet Maximum
Side View
8 Feet Maximum
Secure Vapor line from joists using isolators every 8 ft. Secure
Liquid Line directly to Vapor line using tape, wire, or other appropriate method every 8 ft.
Comply with National, State, and Local Codes when
isolating line sets from joists, rafters, walls, or other
structural elements.
Joist/Rafter
Isolator
Line Set
18-AC95D1-1 7
Isolation From Joist/Rafter
Page 8
8 Feet Maximum
Wall
Isolator
Wall
Side View
8 Feet Maximum
Line Set
Secure Vapor Line using isolators every 8 ft. Secure Liquid Line
directly to Vapor Line using tape, wire, or other appropriate
method every 8 ft.
Isolation In Wall Spaces
Sealant
Ductwork
Insulation
Vapor Line
Isolator
Line Set
Isolation Through Wall
Section 7. Refrigerant Line Brazing
7.1 Braze The Refrigerant Lines
STEP 1 - Remove caps or plugs. Use a debur-
ing tool to debur the pipe ends. Clean both
internal and external surfaces of the tubing
using an emery cloth.
DO NOT hang line sets from ductwork
8 18-AC95D1-1
Page 9
STEP 2 - Remove the pressure tap cap and
valve cores from both service valves.
STEP 3 - Purge the refrigerant lines and indoor
coil with dry nitrogen.
STEP 4 - Wrap a wet rag around the valve
body to avoid heat damage and continue the
dry nitrogen purge.
Braze the refrigerant lines to the service
valves.
Continue the dry nitrogen purge. Do not remove the wet rag until all brazing is completed.
Important: Remove the wet rag before stopping
the dry nitrogen purge.
NOTE: Precautions should be taken to avoid
heat damage to basepan during brazing. It is
recommended to keep the flame directly off of
the basepane.
18-AC95D1-1 9
Page 10
STEP 5 - Replace the pressure tap valve cores
150 PSIG
after the service valves have cooled.
Section 8. Refrigerant Line Leak Check
8.1 Check For Leaks
STEP 1 - Pressurize the refrigerant lines and
evaporator coil to 150 PSIG using dry nitrogen.
STEP 2 - Check for leaks by using a soapy solution or bubbles at each brazed location.
Remove nitrogren pressure and repair any leaks
before continuing.
10 18-AC95D1-1
Page 11
Section 9. Evacuation
1/4 TURN ONLY
9.1 Evacuate the Refrigerant Lines and Indoor Coil
Important: Do not open the service valves until
the refrigerant lines and indoor coil leak check
and evacuation are complete.
STEP 1 - Evacuate until the micron gauge reads
no higher than 350 microns, then close off the
valve to the vacuum pump.
STEP 2 - Observe the micron gauge. Evacuation
is complete if the micron gauge does not rise
above 500 microns in one (1) minute.
Once evacuation is complete blank off the
vacuum pump and micron gauge, and close the
valves on the manifold gauge set.
0350
Microns
ON
OFF
1 MIN.
Section 10. Service Valves
10.1 Open the Gas Service Valve
Important: Leak check and evacuation must be
completed before opening the service valves.
NOTE: Do not vent refrigerant gases into the
atmosphere
STEP 1 - Remove valve stem cap.
STEP 2 - Using an adjustable wrench, turn valve
stem 1/4 turn counterclockwise to the fully open
position.
STEP 3 - Replace the valve stem cap to prevent
leaks. Tighten finger tight plus an additional 1/6
turn.
CAP
UNIT SIDE
OF VALVE
PRESSURE TAP PORT
COUNTERCLOCKWISE
FOR FULL OPEN
POSITION
VALVE STEM
GAS LINE CONNECTION
18-AC95D1-1 11
Page 12
10.1 Open the Liquid Service Valve
▲
WARNING
!
Extreme caution should be exercised when
opening the Liquid Line Service Valve. Turn
counterclockwise until the valve stem just
touches the rolled edge. No torque is required.
Failure to follow this warning will result in abrupt
release of system charge and may result in
personal injury and /or property damage.
Important: Leak check and evacuation must be
completed before opening the service valves.
STEP 1 - Remove service valve cap.
STEP 2 - Fully insert 3/16” hex wrench into the
stem and back out counterclockwise until valve
stem just touches the rolled edge (approximately
five (5) turns.)
STEP 3 - Replace the valve cap to prevent leaks.
Tighten finger tight plus an additional 1/6 turn.
Cap
Unit Side
of Service
Valve
Service Port
3/16” Hex Wrench
Rolled Edge to
Captivate Stem
Hex Headed
Valve System
12 18-AC95D1-1
Page 13
Air Conditioner
Section 11. Electrical - Low Voltage
11.1 Low Voltage Maximum Wire Length
Table 11.1 defines the maximum total length of
low voltage wiring from the outdoor unit, to the
indoor unit, and to the thermostat.
11.2 Low Voltage Hook-up Diagrams
4TEE3F31-66
Variable Speed Air Handler Hook-up
Diagram
WIRE SIZE MAX. WIRE LENGTH
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Table 11.1
24 VOLTS
18 AWG 150 Ft.
16 AWG 225 Ft.
14 AWG 300 Ft.
Variable Speed
Air Handler
Comfort Control
R
Y1
Y2
G
W1
W2
W3
B
Notes:
1. If electric heat does not have 3rd contactor (CH), connect a jumper wire
from W3 to W2. If electric heat does not have 2nd contactor (BH), connect a
jumper wire from W2 to W1.
2. Installer must remove the factory installed jumper between R and BK on the
air handler terminal strip.
3. Installer must add a field installed jumper between R and O on the air handler terminal strip.
4. 4TTX8 units require 80% airflow with Y1 (low stage) and 100% airflow with
Y2 (high stage).
A) Connect Y1 from comfort control to Y at the VS air handler and to Y1
(yellow/black) at the AC.
B) Connect Y2 from comfort control to BK at the VS air handler and to Y2
(yellow/red) at the AC.
5. Comfort control may not have W2 or W3 terminals.
Red
Yellow
Brown
Green
White
Black
Purple
Blue
R
O
LO
Y
Y
BK
G
W1
W2
W3
B
Yellow
Brown
Yellow/Black
Yellow/Red
Blue
Blue
18-AC95D1-1 13
Page 14
Air Conditioner
Communicating Indoor Unit
1
1
12345
12345
HP
2(Comp ressor)
2(Stages)
AC (System)
}
OUTDOOR
Capacity (Tons)
OUTDOOR
}
Torque
CFM/Ton
Cool OffDelay
}
INDOOR
CFM
+12V
R13
R14
R4
1
U1
RNET1
S1
on
on
S2
RNET2
R
6
C22
C19
C15C
12
C10
D9
L1
with 24 V Control Hook-up
Diagram
Comm. Variable Speed
Furnace or Air Handler
Comfort Control
Y1
Y2
W1
W2
W3
R
G
B
Red
Yellow
Brown
Green
White
Black
Purple
Blue
R
BK
D
Y1
Y2
G
W1
W2
W3
B
O
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Yellow
Brown
Yellow/Black
Yellow/Red
Blue
Blue
Notes:
1. See User Interface
setup menu for 24
VAC control mode
and cooling CFM
options.
2. First stage CFM
options for 4TTX8
are 65–80%.
3. W3 terminal may
not be present on
indoor unit.
4. Comfort control
may not have W2
or W3 terminals.
*AM7 Air Handler
Hook-up Diagram
Comfort Control
W
G
Y1
O
R
B
Y2
Field wiring
White
Green
Yellow
Red
Blue
Brown
Air Handler
W3
W2
W1
G
YI
O
R
B
YO
Y2
DH/BK
(In)
(Out)
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
B - Blue
Y1 - Yellow
Y2 - Brown
Air Conditioner
Yellow/Red
Blue
Yellow/Black
Control Board
14 18-AC95D1-1
Must configure to
“ON” for AC Units.
Must configure to “ON” for
two-stage compressors.
Page 15
Air Conditioner
Variable Speed Furnace
Hook-up Diagram
Comfort Control
R
Y1
Y2
G
W1
W2
B
Red
Yellow
Brown
Green
White
Black
Blue
Variable Speed
Furnace
R
O
LO
Y
Y
BK
G
W1
W2
B
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Yellow
Brown
Yellow/Black
Yellow/Red
Blue
Blue
Notes:
1. Installer must cut the
factory R to BK jumper
on furnace circuit board.
OR, on new 15-digit
models, set the S5-2
DIP switch to OFF.
2. Installer must add a
field installed jumper
between R and O on the
furnace terminal strip
3. 4TTX8 units require
80% airflow with Y1 (low
stage) and 100% airflow
with Y2 (high stage).
A) Connect Y1 from
comfort control to
Y at the VS furnace
and to Y1 (yellow/
black) at the AC.
B) Connect Y2 from
comfort control to
BK at the VS furnace
and to Y2 (yellow/
red) at the AC.
4. Comfort control may not
have W2 or W3 terminals.
5. If single stage heating
comfort control is used,
jumper W1 to W2 on the
furnace terminal strip.
18-AC95D1-1 15
Page 16
Section 12. Electrical - High Voltage
▲
WARNING
!
12.1 High Voltage Power Supply
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and
troubleshooting of this product, it may be necessary to work with live electrical components.
Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.
The high voltage power supply must agree with
the equipment nameplate.
Power wiring must comply with national, state,
and local codes.
Follow instructions on unit wiring diagram located
on the inside of the control box cover and in the
Service Facts document included with the unit.
12.2 High Voltage Disconnect Switch
Install a separate disconnect switch at the
outdoor unit.
For high voltage connections, flexible electrical conduit is recommended whenever vibration transmission may create a noise problem
within the structure.
12.3 High Voltage Ground
Ground the outdoor unit per national, state, and
local code requirements.
16 18-AC95D1-1
Page 17
Section 13. Start Up
OFF
DON
E
CANCEL
ON
OFF
E
13.1 System Start Up
STEP 1 - Ensure Sections 7 through 12 have
been completed.
STEP 2 - Set System Thermostat to OFF.
STEP 3 - Turn on disconnect(s) to apply power
to the indoor and outdoor units.
STEP 4 - Wait one (1) hour before starting the
unit if compressor crankcase heater accessory is used and the Outdoor Ambient is below
70ºF.
STEP 5 - Set system thermostat to ON.
60 MIN.
ON
DON
CANCEL
18-AC95D1-1 17
Page 18
Section 14. System Charge Adjustment
14.1 Temperature Measurements
STEP 1 - Check the outdoor temperatures.
Subcooling (in cooling mode) is the only recommended method of charging above 55º F ambient outdoor temperature.
For best results the indoor temperature should
be kept between 70º F to 80º F.
Note: It is important to return in the spring or
summer to accurately charge the system in the
cooling mode when outdoor ambient temperature is above 55º F.
120º F
55º F
Outdoor Temp
80º F
70º F
Indoor Temp
14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
STEP 1 - Use the refrigerant line total length
and lift measurements from Section 5.3.
Total Line Length = __________ Ft.
Vertical Change (Lift) = __________ Ft.
LIFT
18 18-AC95D1-1
Page 19
STEP 2 -
Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below.
REFRIGERANT LINE LIFT (FT)
REFRIGERANT LINE LIFT (FT)
2 Ton Unit
SUBCOOL CHARGING CHART CORRECTIONS TABLE
60
50
40
30
25
20
15
10
0
10 20 25 30 40 60
25 ft. Maximum Lift
Add 3
o
Add 2
o
Add 1
Use design subcooling
TOTAL REFRIGERANT LINE LENGTH (FT)
4 Ton Unit
SUBCOOL CHARGING CHART CORRECTIONS TABLE
60
50
40
30
25
20
15
10
0
10 20 25 30 40 60
TOTAL REFRIGERANT LINE LENGTH (FT)
25 ft. Maximum Lift
Add 3º Add 4º
Add 1º
Use Design Subcooling
3 Ton Unit
SUBCOOL CHARGING CHART CORRECTIONS TABLE
60
50
40
REFRIGERANT LINE LIFT (FT)
30
25
20
15
10
0
10 20 25 30 40 60
o
25 ft. Maximum Lift
o
Add 2
o
Add 1
Use design subcooling
TOTAL REFRIGERANT LINE LENGTH (FT)
Add 3
Add 1
o
o
5 Ton Unit
SUBCOOL CHARGING CHART CORRECTIONS TABLE
60
Add 3ºAdd 2º
Add 2º
REFRIGERANT LINE LIFT (FT)
50
40
30
25
20
15
10
0
10 20 25 30 40 60
TOTAL REFRIGERANT LINE LENGTH (FT)
25 ft. Maximum Lift
Add 1º
Use Design Subcooling
Add 2º
Add 3º
Add 4º
Add 2º
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Subcooling Correction = __________º F
Final Subcooling Value = __________º F
STEP 3 - Stabilize the system by operating for a
minimum of 20 minutes.
At startup, or whenever charge is removed or
added, the system must be operated for a minimum of 20 minutes to stabilize before accurate
measurements can be made.
20 MIN.
18-AC95D1-1 19
Page 20
STEP 4 - Measure the liquid line temperature
3
and pressure at the outdoor unit’s service valve.
Measured Liquid Line Temp = __________ º F
Liquid Gage Pressure = __________ PSI
Final Subcooling Value = __________ º F
STEP 5 - Use the final subcooling value, refrigerant temperature and pressure from STEP 4, to
determine the proper liquid gage pressure using
Table 14.2.
Example: Assume a 12º F Final Subcooling
value and liquid temp of 90º F.
1. Locate 12º F Final Subcooling in Table 14.2.
2. Locate the Liquid Temperarature (90º F) in
the left column.
3. The Liquid Gage Pressure should be approximately 327 PSI. (This is the shown as
the intersection of the Final Subcooling column
and the Liquid Temperature row.
Table 14.2
R-410A REFRIGERANT CHARGING CHART
LIQUID
TEMP
F)
(
°
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
FINAL SUBCOOLING (
8910 11 12 13 14
LIQUID GAGE PRESSURE (PSI)
179 182 185 188 191 195 198
195 198 201 204 208 211 215
211 215 218 222 225 229 232
229 232 236 240 243 247 251
247 251 255 259 263 267 271
267 271 275 279 283 287 291
287 291 296 300 304 309 313
309 313 318 322 327 331 336
331 336 341 346 351 355 360
355 360 365 370 376 381 386
381 386 391 396 402 407 413
407 413 418 424 429 435 441
435 441 446 452 458 464 470
464 470 476 482 488 495 501
495 501 507 514 520 527 533
From Dwg. D154557P01 Rev.
°
107 °F
F)
20 18-AC95D1-1
Page 21
STEP 6 - Adjust refrigerant level to attain
PRESSURE CURVES FOR 4TTX6060E
proper gage pressure.
Add refrigerant if the Liquid Gage Pressure
is lower than the chart value.
1. Connect gages to refrigerant bottle
and unit as illustrated.
2. Purge all hoses.
3. Open bottle.
4. Stop adding refrigerant when liquid
line temperature and Liquid Gage
Pressure matches the charging chart
Final Subcooling value.
Recover refrigerant if the Liquid Gage Pressure is higher than the chart value.
STEP 7 - Stabilize the system.
1. Wait 20 minutes for the system condition to stabilize between adjustments.
Note: When the Liquid Line Temperature and
Gage Pressure approximately match the chart,
the system is properly charged.
2. Remove gages.
3. Replace service port caps to prevent
leaks. Tighten finger tight plus an additional 1/6 turn.
STEP 8 - Verify typical performance.
Refer to System Pressure Curves in the Service
Facts to verify typical performance.
20 MIN.
(Example only - see Service Facts)
EGATS DNOCESEGATS TSRIF
Cooling with Thermal Expansion Valve Cooling with Thermal Expansion Valve
500
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM 71,
450
67, 63 AND 59 DEG F.
400
350
(4) (3)
300
250
LIQUID PRESSURE (PSIG)
200
180
170
160
150
140
130
ION PRESSURE (PSIG)
(1)
40 50 60 70 80 90 100 110 120
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM 71,
67, 63 AND 59 DEG F.
(5)
OUTDOOR TEMPERATURE (Degree F)
(3)
INDOOR ENTERING
500
WET BULB CURVES
(2)
TOP TO BOTTOM 71,
450
67, 63 AND 59 DEG F.
400
350
(4)
300
250
200
40 50 60 70 80 90 100 110 120
INDOOR ENTERING
180
WET BULB CURVES
TOP TO BOTTOM 71,
170
67, 63 AND 59 DEG F.
160
(2)
150
(5)
140
130
1A66F3EET41A66F3EET4
(3)
(1)
(3)
(2)
(2)
18-AC95D1-1 21
Page 22
STEP 9 - Record System Information for reference.
Record system pressures and temperatures
after charging is complete.
Outdoor model number = _________________
Measured Outdoor Ambient = __________ º F
Measured Indoor Ambient = __________ º F
Measured Suction Line Temp = __________ º F
Liquid Gage Pressure = __________ PSI
Suction Gage Pressure = __________ PSI
Measured Liquid Line Temp = __________ º F
Section 15. Checkout Procedures and Troubleshooting
15.1 Operational And Checkout Procedures
Final phases of this installation are the unit Operational and Checkout Procedures. To obtain proper performance, all units
must be operated and charge adjustments made.
Important: Perform a final unit inspection to be sure that factory tubing has not shifted during shipment. Adjust tubing if necessary so tubes do not rub against each other when the unit runs. Also be sure that wiring connections are tight and properly
secured.
CHECKOUT PROCEDURE
After installation has been completed, it is recommended that the entire system be checked against the following list:
1. Leak check refrigerant lines. ........................................ [ ]
2. Properly insulate suction lines and fittings. ................... [ ]
3. Properly secure and isolate all refrigerant lines. ........... [ ]
4. Seal passages through masonry.
If mortar is used, prevent mortar from coming
into direct contact with copper tubing. .......................... [ ]
5. Verify that all electrical connections are tight. ............... [ ]
6. Observe outdoor fan during on cycle for clearance
and smooth operation. .................................................. [ ]
7. Be sure that indoor coil drain line drains freely. Pour water
into drain pan. ............................................................... [ ]
8. Be sure that supply registers and return grilles are open
and unobstructed. ......................................................... [ ]
9. Be sure that a return air filter is installed. ..................... [ ]
10. Be sure that the correct airflow setting is used.
(Indoor blower motor) ................................................... [ ]
11. Operate complete system in each mode to
ensure safe operation. .................................................. [ ]
22 18-AC95D1-1
Page 23
PP
15.2 Troubleshooting
WHAT TO CHEC K MODE
SYSTEM FAULTS
REFRIGERANT CIRCUIT
Head Pressure Too High
Head Pressure Too Low
Suction Pressure Too High
Suction Pressure Too Low
Liquid Refrig. Floodback (TXV/EEV)
Liquid Refrig. Floodback
(Cap. Tube)
I.D. Coil Frosting
Compressor Runs
Inadequate or No Cooling/Htg
ELECTRICAL
Compressor & O.D. Fan
Won’t Start
Compressor Will Not Start
But O.D. Fan Runs
O.D. Fan Won’t Start
Compressor Hums But Won’t Start
Compressor Cycles on IOL
I.D. Blower Won’t Star t
DEFROST
Unit Won’t Initiate Defrost
Defrost Terminates on Time
Unit Icing Up
HIG H VOLTAGE WIRI NG
COM PRES SOR I OL
POWE R SUP PLY
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H
P
P
P
P
START CA PACITOR
RUN C APACITO R
P
P
P
S
P
S
P
P
P
S
P
S
P
P
CON TROL T RANS FORM ER
CON TACTOR CONTACTS
LOW VOLTAGE WIRI NG
START RE LAY
S
S
P
S
S
P
P
P
S
S
P
S
S
P
S
S
P
S
S
P
REF. UNDER CHAR GE
INE FFIC IENT COMP.
P
P
P
P
P
P
P
S
S
EXC ESSI VE EVAP. LOAD
REF. OVERCH ARGE
S
S
S
S
S
S
S
S
STU CK CO MPRE SSOR
LOW VOLTAGE FU SE
CON TACTOR COIL
THE RMOS TAT
S
P
S
S
S
S
S
S
S
S
S
S
S
S
PPP
P
S
P
S
P
S
NON COND ENSA BLES
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
O.D. AIR R ECIR CULATIO N
TXV /EEV STUCK OPEN
RES. O.D. AIRF LOW
P
S
P
S
P
S
S
S
S
S
P
S
S
S
S
S
S
S
C - Cooling H - Heating P - Primary Causes S - Secondary Causes * - 3 Phase Only
REF. CIR. RES TRIC TION S
RES. I.D. AIRFL OW
SUP ERHE AT
S
S
S
S
P
P
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
CHE CK VALVE LE AKIN G
*
SOV CO IL DE FECT IVE
SOV LE AKIN G
S
P
S
S
S
P
S
S
P
P
S
P
S
P
S
DEF ROST CONTR OL DEF.
DEF ROST RELAY DEF.
S
S
S
P
P
S
S
S
S
S
S
S
P
P
P
P
P
P
P
S
S
P
P
18-AC95D1-1 23
Page 24
6200 Troup Highway
Tyler, TX 75707
www.trane.com
24 18-AC95D1-1
The manufacturer has a policy of continuous product and product data improvement
and it reserves the right to change design and specifications without notice.
Representative-only illustrations included in this document.
© 2013 Trane 03/13
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