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

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

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.

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