Carrier 38GP - Manual (Page 7)

6. To reassemble unit:
a. Reinstall top cover with fan motor and blade.
b. Push excess motor leads back into wire retainer and
replace all screws.
c. Reconnect electrical power and check fan for proper
operation.
C. Electrical Controls and Wiring
With power disconnected to unit, check all electrical connec­
tions for tightness. Tighten aU screws on electrical connec­
tions. If any smoky or burned connections are noticed, dis­
assemble the connection, clean aU parts and stripped wire,
reassemble properly, (Use new connector if old one is burned
or corroded.) and secure tightly. Electrical controls are diffi­
cult to check without proper instrumentation; therefore,
reconnect the electrical power to the unit and observe the
unit through one complete operating cycle.
If there are any discrepancies in the operating cycle, contact
your Distributor and request service.
D. Refrigerant Circuit
The refrigerant circuit is difficult to check for leaks without
proper equipment. Therefore, if low cooling performance is
suspected, contact your local Distributor for service.
Standard Installation Practices
This Standard Installation Practices publication is intended
for use with all electric air conditioning units ranging from
14,000 thru 60,000 Btuh.
Modern air conditioning systems consist of a remotely
located condensing unit, an evaporator coU, and intercon­
necting refrigerant tubes. The proper installation of each of
these components wUl insure that the system wiU provide
the comfort for which it is designed. The following pages list
the minimum steps to be taken during the installation of an
air conditioning unit.
In general, the condensing unit should be located remotely
from the evaporator coil and have adequate clearances for
airflow and service. The evaporator coil should be located in
an air handler that has enough capacity to load the coil and,
the refrigerant tubes should be as short as practical.
Extreme care should be taken when installing the system to
avoid contaminating it with edr and moisture: Either con­
taminant will cause a system failure.
When the system is placed in operation, it is important that
the homeowner be informed of the maintenance steps
required to keep the system in proper operation. Among
these are the following:
1. Keep air filter in place when system is in operation;
replace or clean it regularly.
2. Keep condenser coü clean, and do not obstruct airflow.
3. If system has crankcase heater, turn on power to unit
at least 12 hours before thermostat is turned to cooling
for spring startup.
4. It is not recommended that condensing unit be oper­
ated below 55° F outdoor temperature. If operation
below this temperature is desired, an optional low-
ambient kit is available from your Distributor.
The following sections, when used in conjunction with the
detedled unit instructions, Eire the steps needed to complete
the installation of an air conditioning system. If more
detailed instructions are required, see your Distributor.
I. LOCATING THE UNIT
This condensing unit is approved for outdoor installations.
1. Consult local codes or ordinances for restrictions
regarding location of unit.
2. Consult dimensional drawing for following:
a. Location of refrigerant connections and electrical
connections.
b. Recommended clearEmces.
c. Direction of condenser airflow.
d. Mounting base dimensions.
3. Place unit on level base strong enough to support
weight of unit and to resist effects of frost heaving, etc.
Concrete lintels can be used if spaced to adequately
support unit.
4. AUow air to circulate under unit. Legs or bases are pro­
vided on most units for this purpose. If legs or bases
are not provided, spacers can be obtained from your
Distributor—or unit may be set on a bituminous mix­
ture, such as roofing tar, to prevent base pan from rust­
ing. Do not plug drain holes.
5. On rooftop applications, locate unit at least 6 inches
above roof surface. Where possible, place unit above a
load-bearing wall. Arrange supporting members to ade
quately support unit and minimize transmission of
vibration to building. Either precast concrete lintels,
concrete blocks, treated timbers, or steel beams can be
used. Consult local codes governing rooftop appli­
cations.
6. Avoid locations where flowers, shrubs, etc. are in path­
way of condenser discharge air, or where condenser f£m
wiU discharge against prevailing wind or building.
Select a location for the unit where ice and snow wiE
not faE from an overhang and damage the unit top or
fan blade.
7. Avoid locations where normal operating sounds may be
objectionable, such as beneath windows, between struc­
tures, or near patios. Should operating sounds be objec-
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