Trane A4AC3018D User manual

Installation and Operation Manual

April 2022 88-A4AC3001-1J-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

A4AC3018D A4AC3018A

A4AC3023D A4AC3023A

A4AC3024D A4AC3024A

A4AC3030D A4AC3029A

A4AC3035D A4AC3030A

A4AC3036D A4AC3036A

A4AC3042D A4AC3042A

A4AC3048D A4AC3043A

A4AC3060D A4AC3048B

A4AC3060A

Note: “Graphics in this document are for representation only.

Actual model may differ in appearance.”

Condensing Units

2 88-A4AC3001-1J-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.

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 AP-

PROVED 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

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

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 connec-

tion with the installation. Should further information be desired

Note: The manufacturer recommends installing only approved

matched indoor and outdoor systems. All of the manufacture’s

split systems are AHRI rated with Piston/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.

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.

88-A4AC3001-1J-EN 3

Table of Contents

Section 1. Safety............................................................................................................................ .............................. 2

Section 2. Unit Location Considerations .................................................................................... .............................. 4

Section 3. Unit Preparation........................................................................................................... .............................. 6

Section 4. Setting the Unit............................................................................................................ .............................. 6

Section 5. Refrigerant Line Considerations................................................................................ .............................. 7

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 ........................................................................................... ............................ 16

Section 13. Start Up....................................................................................................................... ............................ 17

Section 14. System Charge Adjustment (Systems can be rated with TXV, EEV or Piston) .. ............................ 18

Section 15. Checkout Procedures ............................................................................................... ............................ 24

Section 16. Refrigerant Circuits................................................................................................... ............................ 25

Section 17. Wiring Diagrams........................................................................................................ ............................ 29

Section 18. Pressure Curves........................................................................................................ ............................ 35

4 88-A4AC3001-1J-EN

60’

Max

Vertical

Change

Standard

Line Set

60’ Max

Line Length

60’

Max

Vertical

Change

Section 2. Unit Location Considerations

2.1 Unit Dimensions and Weight

2.2 Refrigerant Piping Limits

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.

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. Standard and alternate line sizes and

service valve connection sizes are shown in

Table 5.1.

* See Table 5.1 for exceptions for certain

tonnages.

Note: For other line lengths, Refer to Refriger-

ant Piping Application Guide, SS-APG006-EN

or Refrigerant Piping Software Program, 32-

3312-xx (latest revision).

Unit Dimensions and Weight

Models H x D x W (in)

Weight* (lb)

A4AC3018D 28.6 x 23.6 x 23.6 130

A4AC3023D 32.6 x 23.6 x 23.6 130

A4AC3024D 28.6 x 25.6 x 25.6 134

A4AC3030D 28.6 x 29.8 x 29.8 163

A4AC3035D 28.6 x 29.8 x 29.8 161

A4AC3036D 32.6 x 29.8 x 29.8 161

A4AC3042D 28.6 x 34.3 x 34.3 193

A4AC3048D 28.6 x 34.3 x 34.3 159

A4AC3060D 36.6 x 34.3 x 34.3 220

A4AC3018A 28.6 x 23.6 x 23.6 130

A4AC3023A 28.6 x 23.6 x 23.6 130

A4AC3024A 28.6 x 25.6 x 25.6 134

A4AC3029A 28.6 x 23.6 x 23.6 130

A4AC3030A 28.6 x 29.8 x 29.8 163

A4AC3036A 28.6 x 29.8 x 29.8 160

A4AC3042A 28.6 x 29.8 x 29.8 177

A4AC3043A 28.6 x 34.3 x 34.3 193

A4AC3048B 28.6 x 34.3 x 34.3 159

A4AC3060A 36.6 x 34.3 x 34.3 220

* Weight values are estimated.

88-A4AC3001-1J-EN 5

Min. 12” to

Shrubbery

Avoid Install

Near Bedrooms

Min 5’ Unrestricted

Access Panel

Min 3’

Unrestricted

2.3 Suggested Locations for Best Reliability

Min. 12” to

Shrubbery

Min. 12”

to Wall

2.4 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.

6 88-A4AC3001-1J-EN

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.

For other applications refer to application guide.

88-A4AC3001-1J-EN 7

Section 5. Refrigerant Line Considerations

5.1 Refrigerant Line and Service Valve Connection Sizes

Table 5.1

Note: For other line lengths, Refer to Refrigerant Piping Application Guide, SS-APG006-EN or Refrigerant Piping

Software Program, 32-3312-xx (latest revision).

RATED

LINE SIZES

Line Sizes Service Valve Connection Sizes Max Line & Lift Lengths

Vapor

Line

Liquid

Line

Vapor Line

Connection

Liquid Line

Connection

TOTAL Max

Line Length (ft.) Max Lift (ft.)

A4AC3018D 3/4 3/8 3/4 3/8 150 50

A4AC3023D 3/4 3/8 3/4 3/8 150 50

A4AC3024D 3/4 3/8 3/4 3/8 150 50

A4AC3030D 3/4 3/8 3/4 3/8 150 50

A4AC3035D 3/4 3/8 3/4 3/8 150 50

A4AC3036D 3/4 3/8 3/4 3/8 150 50

A4AC3042D 7/8 3/8 7/8 3/8 150 50

A4AC3048D 7/8 3/8 7/8 3/8 150 50

A4AC3060D 7/8 3/8 7/8 3/8 150 50

A4AC3018A 3/4 3/8 3/4 3/8 150 50

A4AC3023A 3/4 3/8 3/4 3/8 150 50

A4AC3024A 3/4 3/8 3/4 3/8 150 50

A4AC3029A 3/4 3/8 3/4 3/8 150 50

A4AC3030A 3/4 3/8 3/4 3/8 150 50

A4AC3036A 3/4 3/8 3/4 3/8 150 50

A4AC3042A 7/8 3/8 7/8 3/8 150 50

A4AC3043A 7/8 3/8 7/8 3/8 150 50

A4AC3048B 7/8 3/8 7/8 3/8 150 50

A4AC3060A 7/8 3/8 7/8 3/8 150 50

8 88-A4AC3001-1J-EN

Line Length

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.

88-A4AC3001-1J-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-A4AC3001-1J-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 debur-

ing tool to debur the pipe ends. Clean both

internal and external surfaces of the tubing

using an emery cloth.

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