Trane 18-BC55D1-2 - Manual

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
A
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.