Trane A4HP5018D1000A Assembly instructions

Installer’s Guide
July 2022 88-A4HP5001-1B-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
A4HP5018D1000A
A4HP5024D1000A
A4HP5030D1000A
A4HP5036D1000A
A4HP5042D1000A
A4HP5048D1000A
A4HP5060D1000A
Note: “Graphics in this document are for representation only.
Actual model may differ in appearance.”
Heat Pumps

2 88-A4HP5001-1B-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
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 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 re-
sult 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
!

88-A4HP5001-1B-EN 3
Table of Contents
Section 1. Safety........................................................................................................................................................... 2
Section 2. Unit Location Considerations ................................................................................................................... 4
Section 3. Unit Preparation.......................................................................................................................................... 7
Section 4. Setting the Unit........................................................................................................................................... 7
Section 5. Refrigerant Line Considerations............................................................................................................... 8
Section 6. Refrigerant Line Routing ........................................................................................................................... 9
Section 7. Refrigerant Line Brazing.......................................................................................................................... 10
Section 8. Refrigerant Line Leak Check................................................................................................................... 12
Section 9. Evacuation ................................................................................................................................................ 13
Section 10. Service Valves ........................................................................................................................................ 13
Section 11. Electrical - Low Voltage ......................................................................................................................... 14
Section 12. Electrical - High Voltage ........................................................................................................................ 18
Section 13. Start Up.................................................................................................................................................... 19
Section 14. System Charge Adjustment (Systems can be rated with TXV, EEV or Piston) ................................ 20
Section 15. Checkout Procedures and Troubleshooting........................................................................................ 26

4 88-A4HP5001-1B-EN
D
W
H
Section 2. Unit Location Considerations
2.1 Unit Dimensions and Weight
Table 2.1
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.
Unit Dimensions and Weight
Models H x W x D (in) Weight* (lb)
A4HP5018D 32.6 X 29.8 X 29.8 162
A4HP5024D 32.6 X 29.8 X 29.8 162
A4HP5030D 28.6 X 29.8 X 29.8 159
A4HP5036D 36.6 X 34.3 X 34.3 199
A4HP5042D 44.6 X 34.3 X 34.3 227
A4HP5048D 44.6 X 34.3 X 34.3 250
A4HP5060D 44.6 X 34.3 X 34.3 250
* Weight values are estimated uncrated.
Liquid Line Connection
Access valve for compressor
suction pressure measurement
Suction Line
Connection
2.2 Service Valves Locations
1. The locations of the below listed valves in
the unit are shown in the figure.
a) Liquid line connection
b) Access valve for compressor suction
pressure measurement
c) Suction line connection

88-A4HP5001-1B-EN 5
50’
Max
Vertical
Change
Standard
Line Set
150’ Max
TOTAL Line Length
50’
Max
Vertical
Change
2.3 Refrigerant Piping Limits
1. The maximum TOTAL length of refrigerant
lines from outdoor to indoor unit should
NOT exceed 150 feet (including lift).
2. The maximum vertical change should not
exceed 50 feet.
3. Service valve connection diameters are
shown in Table 5.1.
Note: For other line lengths, Refer to Refriger-
ant Piping Application Guide, SS-APG006-EN
or Refrigerant Piping Software Program, 32-
3312-03 (or latest revision).

6 88-A4HP5001-1B-EN
Min. 12” to
Shrubbery
Avoid Install
Near Bedrooms
Min 5’ Unrestricted
Access Panel
Min 3’
Unrestricted
2.4 Suggested Locations for Best Reliability
Min. 12” to
Shrubbery
Min. 12”
to Wall
2.5 Cold Climate Considerations
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.
It is not recommended to install in a location
where noise may distract the building occu-
pants. Some examples of these types of loca-
tions are sleeping quarters and by windows of
a living area. Please discuss location with the
building owner prior to installation.
NOTE: It is recommended that these precau-
tions be taken for units being installed in areas
where snow accumulation and prolonged below
freezing temperatures occur.
• Units should be elevated 3-12 inches above
the pad or rooftop, depending on local
weather. This additional height will allow
drainage of snow and ice melted during
defrost cycle prior to its refreezing. Ensure
that drain holes in unit base pan are not
obstructed preventing draining of defrost
water.
• If possible, avoid locations that are likely to
accumulate snow drifts. If not possible, a
snow drift barrier should be installed around
the unit to prevent a build-up of snow on the
sides of the unit.
Min. 12”
Snow
Barrier
3-12” Elevation
Snow Legs
Pad
Avoid locations such as near windows where
condensation and freezing defrost vapor can
annoy a customer.
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 or icicles from falling directly on the unit.

88-A4HP5001-1B-EN 7
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.
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.

8 88-A4HP5001-1B-EN
Line Length
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
Table 5.1
5.3 Required Refrigerant Line Length
5.2 Factory Charge
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
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.
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.
Line Sizes Service Valve Connection Sizes
Model Vapor
Line
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
A4HP5018D
3/4 3/8 3/4 3/8
A4HP5024D
3/4 3/8 3/4 3/8
A4HP5030D
3/4 3/8 3/4 3/8
A4HP5036D
7/8 3/8 7/8 3/8
A4HP5042D
7/8 3/8 7/8 3/8
A4HP5048D
7/8 3/8 7/8 3/8
A4HP5060D
7/8 3/8 7/8 3/8

88-A4HP5001-1B-EN 9
5.5 Reuse Existing Refrigerant Lines
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.
CAUTION
!
If using existing refrigerant lines make certain
that all joints are brazed, not soldered.
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 appro-
priate method every 8 ft.
Joist/Rafter
Isolator
Line Set
8 Feet Maximum

10 88-A4HP5001-1B-EN
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
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.

88-A4HP5001-1B-EN 11
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 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.

12 88-A4HP5001-1B-EN
STEP 5 - Replace the pressure tap valve cores
after the service valves have cooled.
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

88-A4HP5001-1B-EN 13
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.
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
0350
Microns
ON OFF
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.

14 88-A4HP5001-1B-EN
10.1 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
!
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.

88-A4HP5001-1B-EN 15
11.2 Low Voltage Hook-up Diagrams
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 **
**
**
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.

16 88-A4HP5001-1B-EN
AUX 1
AUX 1
AUX 2
AUX 2
RC
RH
B/C
O
Y1
Y2
G
BK
W1
ODT
W2
W3
ODT
RS1
RS1
R
B/C
O
Y1/YIo
Y/Y2
G
BK
W1
W2
AUX 1
AUX 2
24VAC HOT
COMMON
SOV
COOLING
FAN
HEATING
ODT
RS
B
Y
INDOOR UNIT OUTDOOR UNIT
2 Stage HP Thermostat
O

88-A4HP5001-1B-EN 17
Defrost Board (Used in 3.5, 4 & 5 Ton Models)
Defrost controls have a selectable termination tem-
perature. As shipped, defrost will terminate at 47°F.
For a higher termination temperature, cut Jumper
J2 to achieve 70°F. See Service Facts shipped in
the outdoor unit for more information.
Pin Identification on J5 (See Illustration)
1. TEST_COMMON (Shorting to FRC_DFT
causes the control to initiate Forced Defrost.
Leaving this pin open results in the normal
mode of operation.)
2. FRC_DFT = Forced Defrost (Short TEST_
COMMON to this pin for two (2) seconds to
initiate a forced defrost. Remove the short
after defrost initiates.)
Defrost Control Checkout
Normal operation requires:
• Status LED on board flashing 1 time/second
in standby or 2 times/second with a call for
heating or cooling.
• 24V AC between R & B
• 24V AC between Y, Y0 & B with unit operating
• Defrost initiation when FRC_DFT pin is shorted
to TEST_COMMON pin.
If a defrost control problem is suspected, refer to the
service information in control box.
Defrost Board Detail
JPR2
JPR1
K1
J4
K2
K3
J9
J8 J3
J5
J2 J1
Jumper J2 J5 Test Pins
11.3 Defrost Control
J5 Test Pins
Jumper J2
D158286B

18 88-A4HP5001-1B-EN
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.

88-A4HP5001-1B-EN 19
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

20 88-A4HP5001-1B-EN
STEP 1 - Check the outdoor temperatures.
Subcooling (in cooling mode) is the only recom-
mended method of charging above 55º F ambi-
ent outdoor temperature. See Section 14.2.
For outdoor temperatures below 55º F, see Sec-
tion 14.3.
Note: It is important to return in the spring or
summer to accurately charge the system in the
cooling mode when outdoor ambient tempera-
ture is above 55º F.
For best results the indoor temperature should
be kept between 70º F to 80º F.
STEP 1 - Use the refrigerant line total length
and lift measurements from Section 5.3.
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.)
LIFT
Indoor Temp
80º F
70º F
Outdoor Temp 1
55º F
120º F
Outdoor Temp 2
See Section 14.3 for
Outdoor
Temperatures
Below 55º F
See Section 14.2 for
Outdoor
Temperatures
Above 55º F
55º F
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.