Indoor Coil; Outdoor Coil; Unit Support - Carrier 38TDA Operating And Maintaining

MAIN
Fig. 4—Main Electrical Disconnect
CAUTION
!
Although special care has been taken to minimize
sharp edges in the construction of your unit, be
extremely careful when handling parts or reaching
into the unit.
CHECK THE AIR FILTER
A dirty air filter will cause excessive strain on the compressor
and blower motor. This can cause the components to overheat
and automatically shut down. In the extreme, the components
will fail and need to be replaced. To avoid in-efficient operation
or failure of your unit, CHECK THE FILTER(S) EVERY 3 TO
4 WEEKS. Replace filter(s) when necessary, or clean the filter(s)
.
if you have the reusable type.
Disposable filters should be replaced by similar, new filters of
the same dimensions.
Reusable, permanent filters should be washed in a solution of
cold water and mild detergent, then rinsed and thoroughly dried.
THE FILTER MUST BE COMPLETELY DRY BEFORE
BEING REINSTALLED. To avoid prolonged shutdown of your
unit while a filter is drying, you should have an extra filter on
hand, allowing you to rotate between the 2 with minimal down-
time for your comfort system. Extra filters may be purchased
from your dealer.
There are no filters in the outdoor unit of a split system. If your
indoor unit is a gas or oil furnace, refer to your furnace User's
Manual for filter location and procedures for replacement or
cleaning.
If your system includes an indoor fan coil unit, the filter may be
located in the unit where it connects with the return-air duct or
plenum. (See Fig. 5.) Remove the filter cover plate by sliding
latches toward center of plate. Lift filter to clean lower flange.
Filter is spring-loaded and will "pop out." Reinstall filter, being
certain to secure filter behind lower flange. When reinstalling
cover plate, secure plate behind upper flange then slide tabs
outward.
The indoor fan coil unit may be located in the attic. In this
instance, the filter could be located behind the return-air grille.
Access the filter by removing 2 screws from return-air grille.
ON
OFF
Fig. 5—Removing Filter from
Fan Coil Unit

INDOOR COIL

If the split-system coil has only been operated with a clean filter
in place, it should require minimal cleaning. You may use a vac-
uum cleaner and soft brush attachment to remove any accumu-
lation of dust from the top and underside of the finned coil
surface. However, only perform this maintenance when the coil
is completely dry.
If you cannot get the coil clean by this method, call your dealer for
service. It may be necessary to clean the coil with a detergent solu-
tion and rinse it with water, which could require removing the coil.
You should not attempt this yourself.

OUTDOOR COIL

If grass clippings, leaves, shrubbery, and debris are kept away
from the outdoor unit, minimal care should be sufficient to keep
the system functioning properly. For proper drainage, debris must
be removed periodically from the base pan. However, if the out-
door coil becomes dirty, use a brush or vacuum cleaner and soft
brush attachment to clean the exterior surface. If dirt is deep in the
coil, contact your dealer for service. The outdoor fan motor may
have to be disconnected and the top panel removed to gain access
to the coil for thorough cleaning. Do not attempt this yourself.
OUTDOOR COIL—SEA COAST
If your unit is located near the ocean, special maintenance is
required. Ocean mist/breeze carries salt, which is corrosive to
most metals. Although your new unit is made out of galvanized
metal and is protected by top grade paint, you should take the
precaution of additional maintenance by periodically washing
the unit. By washing all exposed surfaces and coil approxi-
mately every 3 months, you will add life to your unit. Please
consult your installing contractor for proper intervals/proce-
dures for your geographic area or service contact.

UNIT SUPPORT

Your split-system outdoor unit should be maintained in a level
position. If its support shifts or settles so that the unit is no longer
level, you should correct the condition. Relevel it promptly to
assure condensate drainage out of the unit. If you notice that
water or ice collects beneath the unit, arrange for it to be drained
away from the unit.
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