Trane A4AC5018D1000A User manual

Installation and Operation Manual
April 2022 88-A4AC5001-1A-EN
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating,
and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or
altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all pre-
cautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
Models
A4AC5018D1000A
A4AC5024D1000A
A4AC5030D1000A
A4AC5036D1000A
A4AC5042D1000A
A4AC5048D1000A
A4AC5060D1000A
Note: “Graphics in this document are for representation only.
Actual model may differ in appearance.”
Condensing Units

2 88-A4AC5001-1A-EN
IMPORTANT — This Document is customer property
and is to remain with this unit. Please return to service
information pack upon completion of work.
Section 1. Safety
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 connec-
tion 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 sys-
tem. 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 or
APP-APG012-EN.
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.
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
APPROVED POE COMPRESSOR OIL.
WARNING
!
WARNING
!
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and trouble-
shooting 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.
WARNING
!
If using existing refrigerant lines make certain that all
joints are brazed, not soldered.
CAUTION
!
Scroll compressor dome temperatures may be hot. Do
not touch the top of compressor; it may cause minor
to severe burning.
CAUTION
!
WARNING
!
WARNING!
This product can expose you to chemicals including lead,
which are known to the State of California to cause cancer
and birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
WARNING
!

88-A4AC5001-1A-EN 3
Table of Contents
Section 1. Safety............................................................................................................................................................ 2
Section 2. Unit Location Considerations .................................................................................................................... 4
Section 3. Unit Preparation........................................................................................................................................... 5
Section 4. Setting the Unit............................................................................................................................................ 6
Section 5. Refrigerant Line Considerations................................................................................................................ 6
Section 6. Refrigerant Line Routing ............................................................................................................................ 8
Section 7. Refrigerant Line Brazing............................................................................................................................. 9
Section 8. Refrigerant Line Leak Check.................................................................................................................... 11
Section 9. Evacuation ................................................................................................................................................. 11
Section 10. Service Valves ......................................................................................................................................... 12
Section 11. Electrical - Low Voltage .......................................................................................................................... 13
Section 12. Electrical - High Voltage ......................................................................................................................... 15
Section 13. Start Up..................................................................................................................................................... 16
Section 14. System Charge Adjustment (Systems can be rated with TXV, EEV or Piston) ................................. 17
Section 15. Checkout Procedures ............................................................................................................................. 22
Section 16. Refrigerant Circuits................................................................................................................................. 23
Section 17. Wiring Diagrams...................................................................................................................................... 26
Section 18. Pressure Curves...................................................................................................................................... 28

4 88-A4AC5001-1A-EN
Table 2.1
Section 2. Unit Location Considerations
2.1 Unit Dimensions and Weight
2.2 Refrigerant Piping Limits
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 sixty (60) 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 revi-
sion).
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.
D
W
H
60’
Max
Vertical
Change
Standard
Line Set
60’ Max
Line Length
60’
Max
Vertical
Change
Unit Dimensions and Weight
Models H x W x D (in) Weight* (lb)
A4AC5018D 28.6 x 29.8 x 29.8 161
A4AC5024D 28.6 X 25.6 X 25.6 162
A4AC5030D 36.6 X 29.8 X 29.8 184
A4AC5036D 36.6 X 34.3 X 34.3 212
A4AC5042D 28.6 X 34.3 X 34.3 159
A4AC5048D 44.6 X 34.3 X 34.3 256
A4AC5060D 36.6 X 34.3 X 34.3 220
* Weight values are estimated.

88-A4AC5001-1A-EN 5
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 pouring directly on the unit.
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.
Min. 12” to
Shrubbery
Avoid Install
Near Bedrooms
Min 5’ Unrestricted
Access Panel
Min 3’
Unrestricted
Min. 12” to
Shrubbery
Min. 12”
to Wall

6 88-A4AC5001-1A-EN
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.
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
Table 5.1
Line Sizes Service Valve Connection Sizes
Model Vapor
Line
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
A4AC5018D
3/4 3/8 3/4 3/8
A4AC5024D
3/4 3/8 3/4 3/8
A4AC5030D
3/4 3/8 3/4 3/8
A4AC5036D
7/8 3/8 3/4 3/8
A4AC5042D
7/8 3/8 7/8 3/8
A4AC5048D
7/8 3/8 7/8 3/8
A4AC5060D
1-1/8 3/8 7/8 3/8
5.2 Factory Charge
The outdoor condensing units are factory
charged with the system charge required for the
outdoor condensing unit, ten (10) feet of tested
connecting line, and the smallest rated indoor
evaporative coil match. Always verify proper
system charge via subcooling (TXV/EEV) or
superheat (fixed orifice) per the unit nameplate.
TUBING INFORMATION
LINE TYPE REFRIGERANT TO ADD AT SPECIFIED
ADDITIONAL LENGTH
Suction
Line
Liquid
Line 20 ft 30 ft 40 ft 50 ft 60 ft
3/4” 3/8" 3 oz 9 oz 15 oz 21 oz 27 oz
7/8" 3/8" 3 oz 9 oz 16 oz 22 oz 28 oz

88-A4AC5001-1A-EN 7
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.
Line Length
5.5 Reuse Existing Refrigerant Lines
CAUTION
!
If using existing refrigerant lines make certain
that all joints are brazed, not soldered.
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.
Vapor Line
Liquid Line
Insulation
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
number SS-APG006-EN.

8 88-A4AC5001-1A-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.
Comply with National, State, and Local Codes when
isolating line sets from joists, rafters, walls, or other
structural elements.
Isolation From Joist/Rafter
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.
Joist/Rafter
Isolator
Line Set
8 Feet Maximum
Isolation In Wall Spaces
Side View
Wall
Isolator
Line Set
8 Feet Maximum
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.
8 Feet Maximum

88-A4AC5001-1A-EN 9
Isolation Through Wall DO NOT hang line sets from ductwork
Sealant
Insulation
Vapor Line
Wall
Ductwork
Isolator
Line Set
Section 7. Refrigerant Line Brazing
7.1 Braze The Refrigerant Lines
STEP 1 - Remove caps or plugs. Use a deburing
tool to debur the pipe ends. Clean both internal
and external surfaces of the tubing using an
emery cloth.
STEP 2 - Remove the pressure tap cap and
valve cores from both service valves.

10 88-A4AC5001-1A-EN
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 nitro-
gen 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: Install drier in Liquid Line.
NOTE:NOTE: Precautions should be taken to avoidPrecautions should be taken to avoid
heat damage to basepan during brazing. It isheat damage to basepan during brazing. It is
recommended to keep the flame directly off ofrecommended to keep the flame directly off of
the basepan.the basepan.
STEP 5 - Replace the pressure tap valve cores
after the service valves have cooled.

88-A4AC5001-1A-EN 11
STEP 2 - Check for leaks by using a soapy solu-
tion or bubbles at each brazed location.
Remove nitrogren pressure and repair any leaks
before continuing.
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.
150 PSIG
Section 9. Evacuation
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.
0350
Microns
ON OFF

12 88-A4AC5001-1A-EN
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.
1 MIN.
Section 10. Service Valves
10.1 Open the Gas Service Valve
CAP
1/4 TURN ONLY
COUNTERCLOCKWIS
E
FOR FULL OPEN
POSITION
VALVE STEM
GAS LINE CONNECTION
UNIT SID
E
OF VALVE
PRESSURE TAP PORT
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.
10.2 Open the Liquid Service Valve
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
Rolled Edge to
Captivate Stem
Hex Headed
Valve System
Service Port
3/16” Hex Wrench
Unit Side
of Service
Valve
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.
WARNING
!

88-A4AC5001-1A-EN 13
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.
Table 11.1
24 VOLTS
WIRE SIZE MAX. WIRE LENGTH
18 AWG 150 Ft.
16 AWG 225 Ft.
14 AWG 300 Ft.
11.2 Low Voltage Hook-up Diagrams
R
G
B
W1
W2
R
B
O
Y
X2
R
G
B/C
O
Y
W
HEAT PUMP SYSTEMS
Blue
24 VAC HOT
FAN
24 VAC
Common
SOV
COOL/HEAT
1st STAGE
HEATING
2nd STAGE
EMERGENC
Y
HEAT
Thermostat Air Handler Outdoor
Unit
Pink Black W2 Pink
White White
X2
AC SYSTEMS
R
G
B
W1
B
Y
R
G
B/C
Y
W
Blue
24 VAC HOT
FAN
24 VAC
Common
COOLING
HEAT
Thermostat Air Handler Outdoo
r
Unit
In AC systems for multiple stages of electric heat, jumper W1
and W2 together if comfort control has only one stage of heat.

14 88-A4AC5001-1A-EN
With Furnace With Variable Speed Furnace
• Units with pigtails require wirenuts for connections. Cap all unused wires.
•
In AC systems for multiple stages of heat, jumper W1 and W2 together if comfort control has only one stage of heat.
* If equipped with second stage heat
** When using a BK enabled comfort control, cut BK jumper and bypass Y and YLo at the furnace. Connect BK from comfort control
to
BK of the furnace
Thermostat Furnace Furnace
Outdoor
Unit
R
G
B
W1
W2
B
Y
R
G
B/C
W1
W2
24 VAC HOT
FAN
24 VAC
Common
COOL
HEATING
YY1 YY
Y
LO
Thermostat Outdoor
Unit
R
G
B
W1
W2
B
R
G
B/C
Y1
W1
W2
24 VAC HOT
FAN
24 VAC
Common
COOL
HEATING
O
BK
BK **
**
**

88-A4AC5001-1A-EN 15
Section 12. Electrical - High Voltage
12.1 High Voltage Power Supply
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
12.3 High Voltage Ground
Ground the outdoor unit per national, state, and
local code requirements.
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and
troubleshooting of this product, it may be nec-
essary 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.
WARNING
!
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.

16 88-A4AC5001-1A-EN
Section 13. Start Up
13.1 System Start Up
STEP 2 - Set System Thermostat to OFF.
STEP 3 - Turn on disconnect(s) to apply power
to the indoor and outdoor units.
STEP 5 - Set system thermostat to ON.
OFF
D
O
N
E
CANCEL
ON
OFF
STEP 4 - Wait one (1) hour before starting the
unit if compressor crankcase heater acces-
sory is used and the Outdoor Ambient is below
70ºF.
60 MIN.
STEP 1 - Ensure Sections 7 through 12 have
been completed.
ON
D
O
N
E
CANCEL

88-A4AC5001-1A-EN 17
STEP 1 - Check the outdoor temperatures.
Subcooling (in cooling mode) is the only recom-
mended method of charging above 55º F ambient
outdoor temperature.
Note: For Superheat (In Cooling Mode), refer to
the Superheat Charging Table
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.
STEP 1 - Use the refrigerant line total length
and lift measurements from Section 5 and use
line length adders as shown in Section 5.2 if
required.
Total Line Length = __________ Ft.
Vertical Change (Lift) = __________ Ft.
Note: Use this method when matched with a
TXV or EEV indoor unit.
Section 14. System Charge Adjustment (Systems can be rated with TXV, EEV or Piston)
14.1 Temperature Measurements
14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
Indoor Temp
80º F
70º F
Outdoor Temp
55º F
120º F
LIFT
NOTE: For systems using a indoor piston metering device, refer to the Superheat charging method and chart.
For systems using a TXV or EEV indoor metering device, refer to Subcool charging method and charts.

18 88-A4AC5001-1A-EN
STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below.
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 mini-
mum of 20 minutes to stabilize before accurate
measurements can be made.
20 MIN.
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Subcooling Correction = __________º F
Final Subcooling Value = __________º F
3 Ton
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
Add 5°
Add 4°
Add 2°
Add 3° of Subcooling
Add 1° of Subcooling
3 1/2 Ton
Add 6°
Add 5°
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 3° of Subcooling
Add 2° of Subcooling
Add 1° of Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
4 Ton
Add 6°
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 4° of Subcooling
Add 3° of Subcooling
Add 2° of Subcooling
Add 1° of Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
Add 6°
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 5° of Subcooling
Add 4° of Subcooling
Add 3° of Subcooling
Add 2° of Subcooling
Add 1° of Subcooling
Design
60
50
40
30
25
20
15
10
0
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
5 Ton
2 1/2 Ton
Add 4°
Add 3°
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 2° of Subcooling
Add 1° of Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
1 1/2 Ton
Add 3°
Add 2°
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 1° of Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
2 Ton
Add 4°
Add 2°
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 1° of Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)

88-A4AC5001-1A-EN 19
STEP 4 - Measure the liquid line temperature
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, refriger-
ant 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 ap-
proximately 327 PSI. (This is the shown as
the intersection of the Final Subcooling column
and the Liquid Temperature row.
Table 14.2
8910 11 12 13 14
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
R-410A REFRIGERANT CHARGING CHART
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
LIQUID
TEMP
(°F)
FINAL SUBCOOLING (°F)
LIQUID GAGE PRESSURE (PSI)
From Dwg. D154557P01 Rev. 3
107 °F

20 88-A4AC5001-1A-EN
107 °F
STEP 8 - Verify typical performance.
Refer to System Pressure Curves at the end of
the document to verify typical performance.
STEP 6 - Adjust refrigerant level to attain
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 Pres-
sure is higher than the chart value.
20 MIN.
STEP 7 - Stabilize the system.
1. Wait 20 minutes for the system condi-
tion 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 ad-
ditional 1/6 turn.
PRESSURE CURVE SAMPLE
Cooling @ 1450 SCFM Heating @ 1350 SCFM
DISCHARGE PRESSURE (PSIG)
OUTDOOR TEMPERATURE (Degree F)
SUCTION PRESSURE (PSIG)
110
115
120
125
130
135
140
145
150
155
160
165
170
40 60 80 100 120
200
250
300
350
400
450
500
550
40 60 80 100 120
(1)
(1)
(3)
(3)
(5)
(4)
(2)
(2)
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
30
40
50
60
70
80
90
100
110
120
130
140
-5 5152535455
56
5
200
250
300
350
400
450
500
-5 5152535455
56
5
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.