American Standard TRANE 2TWZ9C Installer's Manual

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 connec-
tion 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

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 manufacturer or
seller cannot be responsible for the interpretation of this informa-
tion, nor can it assume any liability in connection with its use.
NOTICE:
Trane has always recommended installing Trane approved
matched indoor and outdoor systems.
The benefits of installing approved matched systems are
maximum efficiency, optimum performance and best overall
system reliability.
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 recommended 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 three (3) to twelve (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 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.
Installer's Guide
Heat Pumps
2TWZ9C with ComfortLink
1
3. Avoid locating the unit where condensation and freezing of
defrost vapor may annoy the customer. For instance, installing
the unit under a bedroom, kitchen, or picture window may be
annoying to the customer since condensate and fog will occur
during the defrost cycle.
4. Avoid locating the unit under the eaves or other overhead
structures as sizeable icicles may form and the unit may be
damaged by these falling icicles.

B. LOCATION AND PREPARATION OF THE UNIT

1. When removing unit from the pallet, notice the tabs on the
basepan. Remove tabs by cutting with a sharp tool as shown in
Figure 2 (see page 2) and slide unit off of pallet.
2. The unit should be set on a level support pad at least as
large as the unit base pan, such as a concrete slab. If this is
not the application used please refer to application bulletin
"Trane XR-APG**-EN" (* denotes latest revision number).
3. The support pad must NOT be in direct contact with any
structure. Unit must be positioned a minimum of 12" from any
wall or surrounding shrubbery to insure adequate airflow.
Clearance must be provided in front of control box (access
panels) and any other side requiring service access to meet
National Electrical Code. Also, the unit location must be far
enough away from any structure to prevent excess roof run-off
water from pouring directly on the unit. Do not locate unit(s)
close to bedroom(s).
4. The top discharge area must be unrestricted for at least five (5)
feet above the unit.
5. When the outdoor unit is mounted on a roof, be sure the roof
will support the unit's weight. Properly selected isolation is
recommended to prevent transmission to the building structure.
6. The maximum length of refrigerant lines from outdoor to indoor
unit should NOT exceed sixty (60) feet.
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II and Charge Assist
5 FT. ABOVE UNIT — UNRESTRICTED
18-BC53D1-4
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