Trane A5HP4 User manual

88-A5HP4001-1A-EN
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 informa-
tion 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.............................................. 4
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 ............................................... 9
Section 9. Evacuation............................................................................. 9
Section 10. Service Valves..................................................................... 9
Section 11. Electrical - Low Voltage ................................................... 10
Section 12. Electrical - High Voltage .................................................. 11
Section 13. Start Up.............................................................................. 12
Section 14. System Charge Adjustment............................................. 12
Section 15. Checkout Procedures....................................................... 16
Section 16. Defrost Control ................................................................. 17
Section 17. Troubleshooting ................................................................ 20
Section 18. Wiring Diagrams ............................................................... 22
Section 19. Pressure Curves ............................................................... 27
Section 20. Refrigerant Circuit (only for reference)........................... 32
Heat Pumps
A5HP4
Installation and Operation Manual

2 88-A5HP4001-1A-EN
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.
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-454B REFRIGERANT!
Proper service equipment is required. Failure to use
proper service tools may result in equipment damage
or personal injury.
SERVICE
USE ONLY R-454B REFRIGERANT AND
APPROVED COMPRESSOR OIL.
WARNING
!
WARNING
!
The appliance is not to be used by persons (including
children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, un-
less they have been given supervision or instruction.
WARNING
!
Children should be supervised to ensure that they do
not play with the appliance.
WARNING
!
If using existing refrigerant lines should be brazed not
soldered. Solder alloys with a melting temperature
less than 427°C are not acceptable.
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
!
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 equip-
ment, observe all precautions in the literature and on
the tags, stickers, and labels that are attached to the
equipment.
WARNING
!
RISK OF FIRE!
Flammable refrigerant used. To be repaired only by
trained service personnel. Do not puncture refrigerant
tubing.
Dispose of properly in accordance with federal or local
regulations. Flammable refrigerant used.
Mode Model Operating Range
Cooling 1.5 – 5 Ton 55°F – 120°F
Table 1. Operating Range
Ensure that the area is in the open or that it is
adequately ventilated before breaking into the system
or conducting any hot work.
WARNING
!
The appliance shall be stored in a room without contin-
uously operating ignition sources (for examples: open
flames, an operating gas appliance or an operating
electric heater). Do no pierce or burn. Be aware that
refrigerants may not contain an odour.
WARNING
!
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and trouble-
shooting of this product power should be discon-
nected. It may be necessary to work with live electrical
components. Failure to follow all electrical safety pre-
cautions when exposed to live electrical components
could result in death or serious injury..

88-A5HP4001-1A-EN 3
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 D x W (in) Weight* (lb)
A5HP4018D 33 X 30 X 33 174
A5HP4024D 33 x 30 x 33 174
A5HP4030D 33 x 30 x 33 174
A5HP4036D 37 x 34 x 37 199
A5HP4042D 45 x 34 x 37 250
A5HP4048D 45 x 34 x 37 250
A5HP4060D 45 x 34 x 37 251
* Weight values are estimated uncrated.
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 Refrigerant Piping Application Guide, SS-APG006F-EN, or Refrigerant
Piping Software Program.
50’
Max
Vertical
Change
50’
Max
Vertical
Change
Standard
Line Set
150’ Max
TOTAL Line Length
2.2 Piping Guidelines
Piping material, pipe routing, and installation shall include protection from physical damage in operation and
service, and be in compliance with national and local codes and standards. All field joints shall be accessible for
inspection prior to being covered or enclosed. Install of pipe work shall be kept to a minimum.
That provisions shall be made for expansion and contraction of long runs of piping.

4 88-A5HP4001-1A-EN
Min. 12” to
Shrubbery
Avoid Install
Near Bedrooms
Min 5’ Unrestricted
Access Panel
Min 3’
Unrestricted
2.4 Suggested Locations for Best Reliability
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 occupants. Some examples
of these types of locations are sleeping quarters and by
windows of a living area. Please discuss location with the
building owner prior to installation.
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.
NOTE: It is recommended that these precautions 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.
Section 3. Unit Preparation
3.1 Prepare The Unit For Installation
STEP 1 - Check for damage and report promptly 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.

88-A5HP4001-1A-EN 5
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.
Alternate Refrigerant Line and Service Valve Connection Sizes
Line Sizes Service Valve Connection Sizes
Model Vapor
Line
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
A5HP4018D 5/8 5/16 3/4 5/16
A5HP4024D 3/4 5/16 3/4 5/16
A5HP4030D 3/4 5/16 3/4 5/16
A5HP4036D 3/4 5/16 3/4 5/16
A5HP4042D 7/8 5/16 7/8 5/16
A5HP4048D 7/8 5/16 7/8 5/16
A5HP4060D 7/8 3/8 7/8 3/8
Line Sizes Service Valve Connection Sizes
Model Vapor
Line
Liquid
Line
Vapor Line
Connection
Liquid Line
Connection
A5HP4018D 5/8 3/8 3/4 5/16
A5HP4024D 3/4 3/8 3/4 5/16
A5HP4030D 3/4 3/8 3/4 5/16
A5HP4036D 3/4 3/8 3/4 5/16
A5HP4042D 7/8 3/8 7/8 5/16
A5HP4048D 7/8 3/8 7/8 5/16
A5HP4060D 7/8 3/8 7/8 3/8

6 88-A5HP4001-1A-EN
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
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-A5HP4001-1A-EN 7
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.
STEP 3 - Purge the refrigerant lines and indoor coil with dry nitrogen.
Purge the refrigerant lines and indoor coil with dry nitrogen.
Note: A2L equipment shall have red marked service ports and pipes through which refrigerant is serviced.
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.
For units shipped with a field-installed external drier, check liquid line filter drier’s directional flow arrow to confirm
correct direction of refrigeration flow (away from outdoor unit and toward evaporator coil) as illustrated. Braze the
filter drier to the Liquid Line.
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 avoid heat damage to basepan during brazing. It is recommended to
Precautions should be taken to avoid heat damage to basepan during brazing. It is recommended to
keep the flame directly off of the basep
keep the flame directly off of the basep
an.
an.
STEP 5 - Replace the pressure tap valve cores and plastic tabs after the service valves have cooled.
STEP 1 STEP 2 STEP 3

8 88-A5HP4001-1A-EN
3-4” from valve
STEP 4 STEP 5
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.
Note: Remove nitrogen pressure and repair any leaks before continuing.
STEP 3 - Once the initial leak check is complete, complete a system pressure test. Pressurize the system to the
design pressure of the system for a minimum of 60 minutes. Do not add additional refrigerant or test gas after
reaching the design pressure. The system should show no loss of pressure once pressurized. Once the pressure
test is complete follow the steps for evacuation.
After completion of field piping for split systems, the field pipework shall be pressure tested with nitrogen and then
vacuum tested prior to refrigerant charging, according to the following requirements:
1. The minimum leak test pressure of the lineset and indoor coil shall be the high side design pressure, unless the
high side of the system, cannot be isolated from the low side of the system in which case the entire system
shall be pressure tested to the low side design pressure.
2. The test pressure after removal of pressure source shall be maintained for at least 1 hour with no decrease of
pressure indicated by the test gauge, with test gauge resolution not exceeding 5% of the test pressure.
Important: Under no circumstances shall potential sources of ignition be used in the searching for or detection of
refrigerant leaks.
Important: The following leak detection methods are deemed acceptable for all refrigerant systems:
• Electronic leak detectors calibrated for R454B
• Bubble method
STEP 2 - Observe the micron gauge. Evacuation
is complete, if the micron gauge does not rise
above 500 microns in one (1) minute and 1500
microns in ten (10) minutes.
STEP 3 - Once evacuation is complete, blank off
the vacuum pump and micron gauge, and close
the valve on the manifold gauge set.
1 MIN.
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
Section 9. Evacuation and Servicing
9.1 Evacuate the Refrigerant Lines and Indoor Coil

88-A5HP4001-1A-EN 9
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.
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.
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
!
9.2 Servicing
Under no circumstances shall potential sources of ignotion be used in the searching for or detection of refrigerant
leaks.
The following leak detection methods are deemed acceptable for all refrigerant systems:
• Electronic leak detectors calibrated for R454B
• Bubble method
• Fluorscent method agents
If a leakage of refirgerant is found which requires brazing, all of the refrigerant shall be recovered from the system,
or isolated (by means of shut off valves) in a part of the system remote from the leak.
• If repairs must be made after system is charged, properly and safely remove or isolate refrigerant and purge
the section of the system needing repair with Nitrogen gas or oxygen free nitrogen prior to opening the circuit.
• The REFRIGERANT CHARGE shall be recovered into the correctly marked recovery cylinders.
• Ensure that the outlet for the vaccum pump is not close to any potential ignition sources and the ventilation is
available.
• Prior to recharging the system, it shall be pressure-tested with the appropriate purging gas. The system shall
be leak-tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out
prior to leaving the site.
• Ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of
cylinders for holding the total system charge is available. Only use cylinders designated for the recovered
refrigerant and labelled for the refrigerant. Cylinders shall be complete with pressure-relief valve and
associated shut-off valves in good working order.
• A set of caliberated weighing scales shall be available and in good working order. Hoses shall be complete
with leak-free disconnect couplings and in good condition. Ensure any associated electrical components are
sealed.
• The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder. Do not
mix refrigerants.
• If compressors or compressor oils are to be removed, ensure that they have been evacuated to an
acceptable level to make certain that FLAMMABLE REFRIGERANT does not remain within the lubricant.

10 88-A5HP4001-1A-EN
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
CAP
1/4 TURN ONLY
COUNTERCLOCKWISE
FOR FULL OPEN
POSITION
VALVE STEM
GAS LINE CONNECTION
UNIT SIDE
OF VALVE
PRESSURE TAP PORT
Cap
Rolled Edge to
Captivate Stem
Hex Headed
Valve System
Service Port
3/16” Hex Wrench
Unit Side of
Service Valve
Gas Service Valve Liquid Service Valve
• The approved ID/OD combination will provide sufficient safe ventilation in case of a leak.
• Refer Indoor Unit Installer’s Guide for correct specifications on indoor unit install.
• All systems require mitigation boards so on altitude adjustment factors required.
• MCB neds to be included in an A2L System.
Mitigation Board Guidelines
With A5AH4With A5AH6 With 5TAM5
1. Units with pigtails require wirenuts for connections.
2. Cap all unused wires.
3. In AC systems, for multiple stages of electric heat,
jumper W1 and W2 together if comfort control has
only one stage of heat.
1. Units with pigtails require wirenuts for connections.
2. Cap all unused wires.
3. In AC systems for multiple stages of electric heat,
jumper W1 and W2 together if comfort control has
only one stage of heat.
1. Units with pigtails require wirenuts for connec-
tions.
2. Cap all unused wires.
3. When BK is used, do not connect Y2 at the air
handler.
4. When BK is used, cut the jumper between R and
BK on the control board. See indoor wiring
schematic for details.
5. In AC systems, for multiple stages of electric heat,
jumper W1 and W2 together if comfort control has
only one stage of heat.
Thermostat Air Handler Outdoor
Unit
Thermostat Air Handler Outdoor
Unit Thermostat Air Handler Outdoor Unit
R
G
B
W1
W2
B
R
G
B/C
Yl
W1
W2
R
Blue
24 VAC HOT
FAN
24 VAC
Common
COOL/HEAT
1st STAGE
HEATING
1st STAGE
HEATING
2nd STAGE
HEATING
3rd STAGE
Pink
White
OO O
Yl
YOY
W3
Brown
3)
Y2
W3
Brown
R
G
B
W1
W2
B
R
G
B/C
Yl
W1
W2
R
Blue
24 VAC HOT
FAN
24 VAC
Common
COOL/HEAT
1st STAGE
HEATING
1st STAGE
HEATING
2nd STAGE Pink
White
OO O
Yl
YOY
Y2
R
G
B
W1
W2
B
R
G
B/C
Yl
W1
W2
R
Blue
24 VAC HOT
FAN
24 VAC
Common
COOL/HEAT
1st STAGE
HEATING
1st STAGE
HEATING
2nd STAGE Pink
White
OO O
Yl
YOY
Y2
BK
WH/BLK
3)
3)
5)