Trane 18-BC55D1-2 User Manual download pdf

18-BC55D1-2

Heat Pumps

4TWX6

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 nor provide for every possible contingency to

be met in connection with installation. All phases of

this installation must comply with NATIONAL, STATE

AND LOCAL CODES. 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,

A. GENERAL

The following instructions cover 4TWX6 Heat Pump Units,

NOTICE:

These outdoor units may be used with indoor units

equipped with Thermostatic Expansion Valve only.

A WARNING

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

system. 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 pos

sible. Never break a vacuum with air and always change the

driers when opening the system for component replacement.

Check for transportation damage after unit is uncrated.

Report promptly, to the carrier, any damage found to the unit.

To determine the electrical power requirements of the unit,

refer to the nameplate of the unit. The electrical power

available must agree with that listed on the nameplate.

The Weathertron® Heat Pump has been designed and

manufactured to withstand and operate in severe winter

conditions. However, there are precautionary steps which

should be taken at the time of installation which will help

assure the efficient operation of the unit. It is recom

mended that these precautions be taken for units

being installed in areas where snow accumulation and

prolonged below freezing temperatures occur.

1, Units should be elevated 3 to 12 inches above the pad or

rooftop, depending on local weather. This additional

height will allow better drainage of snow and ice (melted

during defrost cycle) prior to its refreezing. This should

prevent a build-up of ice around the unit which occurs

when unit is not elevated. Insure that drain holes in

CAUTION

UNIT CONTAINS R-410A REFRIGERANT!

R-410A OPERATING PRESSURE EXCEEDS THE

LIMIT OF R-22. PROPER SERVICE EOUIPMENT IS

REOUIRED. FAILURE TO USE PROPER SERVICE

TOOLS MAY RESULT IN EOUIPMENT DAMAGE OR

PERSONAL INJURY.

SERVICE

USE ONLY R-41OA REFRIGERANT AND

APPROVED POE COMPRESSOR OIL.

unit base pan are not obstructed preventing

draining of defrost water.

2, 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 and should be of sufficient

distance from the unit to prevent restriction of airflow to

and from the unit. Also allow for proper maintenance

space. The barrier should be constructed of materials

which will blend in with the building design,

3, Avoid locating the unit where condensation and freezing

of defrost vapor may annoy the customer. For instance.

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Summary of Contents

Page 1 - Heat Pumps

18-BC55D1-2Heat Pumps4TWX6ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODESIMPORTANT — This Document is customer proper

Page 2 - Installer’s Guide

Installer’s GuideBASEPAN TAB REMOVALREMOVE TABS AS SHOWNinstalling the unit under a bedroom, kitchen, or picture window may be annoying to the custom

Page 3

Installer’s GuideBRASS LIQUID LINE SERVICE VALVEThe Brass Liquid Line Service Valve is factory shipped in the seated position to hold factory charge.

Page 4

Installer’s Guide10, Replace liquid service pressure tap port cap and valve stem cap. These caps MUST BE REPLACED to prevent leaks. Replace valve stem

Page 5 - Installerà Guide

Installerà GuideH. OPERATIONAL AND CHECKOUT PROCEDURESFinal phases of this installation are the unit Operational and Checkout Procedures which are fo

Page 6

Installer’s Guide4TWX6 OUTLINE DRAWINGNOTE: ALL DiyENSlONS ARE IN MIVl (INCHES).BSERVIC E PANEL ^' ^ELECTRI CA L AND R EFRIGER A NT COMPON E NT

Page 7

Installer’s GuideMOUNTING HOLE LOCATIONNOTE: ALL DIMENSIONS ARE IN MM (INCHES).^ /9-1 i M , 56)i 6, i 6 ;NOTE: For model base size, see table on page

Page 8

Installer’s GuideCHECKOUT PROCEDUREAfter installation has been completed, it is recommended that the entire system be checked against the following li

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Trane 18-BC55D1-2 User Manual

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