Trane WEATHERTRON 4TWX6 Montageanleitung

18-AC105D1-1D-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.

Heat Pumps

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.

4TWX6

Installer’s Guide

Table of Contents

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

Section 2. Unit Location Considerations ............................................. 3

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............................................. 10

Section 9. Evacuation .......................................................................... 11

Section 10. Service Valves .................................................................. 11

Section 11. Electrical - Low Voltage ................................................... 12

Section 12. Electrical - High Voltage .................................................. 15

Section 13. Start Up.............................................................................. 16

Section 14. System Charge Adjustment............................................. 17

Section 15. Checkout Procedures and Troubleshooting.................. 23

2 18-AC105D1-1D-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 cyl-

inders 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 system. All

R-410A systems use a POE oil that readily absorbs

moisture from the atmosphere. To limit this “hygro-

scopic” 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.

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

18-AC105D1-1D-EN 3

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)

4TWX6018H 38 x 30 x 33 174

4TWX6024H 38 x 30 x 33 174

4TWX6030H 43 x 34 x 37 218

4TWX6036H 43 x 34 x 37 219

4TWX6042H 52 x 34 x 37 247

4TWX6048H 52 x 34 x 37 270

4TWX6060H 52 x 34 x 37 270

* Weight values are estimated.

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).

60’ *

Max

Vertical

Change

Standard

Line Set

60’ Max

Line Length

60’ *

Max

Vertical

Change

4 18-AC105D1-1D-EN

Min. 12” to

Shrubber

Avoid Install

Near Bedrooms

Min 5’ Unrestricted

Access Panel

Min 3’

Unrestricted

2.3 Suggested Locations for Best Reliability

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.

Do not locate close to bedrooms as operational

sounds may be objectionable.

Avoid locations such as near windows where

condensation and freezing defrost vapor can

annoy a customer.

Min. 12” to

Shrubber

yMin. 12”

to Wall

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 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

18-AC105D1-1D-EN 5

2.5 Coastal Considerations

STEP 2 - To remove the unit from the pallet,

remove tabs by cutting with a sharp tool.

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.

If installed within one mile of salt water, including seacoasts and inland waterways, models without factory sup-

plied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time.

6 18-AC105D1-1D-EN

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

Line Length

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.

Trane outdoor condensing units are factory charged with the system charge required for the outdoor condensing

unit, fifteen (15) feet of tested connecting line, and the smallest indoor evaporative coil match. If connecting line

length exceeds fteen (15) feet and/or a larger indoor evaporative coil is installed, then nal refrigerant

charge adjustment is necessary.

Line Sizes Service Valve Connection Sizes

Model Vapor

Line

Liquid

Line

Vapor Line

Connection

Liquid Line

Connection

4TWX6018H 3/4 3/8 3/4 3/8

4TWX6024H 3/4 3/8 3/4 3/8

4TWX6030H 3/4 3/8 3/4 3/8

4TWX6036H 7/8 3/8 3/4 3/8

4TWX6042H 7/8 3/8 7/8 3/8

4TWX6048H 7/8 3/8 7/8 3/8

4TWX6060H 1-1/8 3/8 7/8 3/8

18-AC105D1-1D-EN 7

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.

Important: For more information see publi-

cation numbers SS-APG006-EN and APP-

APG011-EN.

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

8 18-AC105D1-1D-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.

18-AC105D1-1D-EN 9

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.

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 evapo-

rator 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: Precautions should be taken to avoid

heat damage to basepan during brazing. It is

recommended to keep the flame directly off of

the basepan.

3-4” from valve

10 18-AC105D1-1D-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

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