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I. AIR FILTERS
Air filter(s) should be checked at least every 3 or 4 weeks and
changed or cleaned whenever it becomes dirty. Dirty filters
produce excessive stress on the blower motor and can cause
the motor to overheat and shut down. Table 1 indicates the
correct filter size for your unit. Refer to Fig. 6 to access the
filter(s).
To replace or inspect filter(s) (or accessory filter rack when
supplied):
1. Remove the filter access panel using a
5
⁄
16
-in. nut driver.
2. Remove the filter(s) by pulling the retaining clips back
and lifting the filter(s) up and out of the unit. If the fil-
ter(s) is dirty, clean or replace with new one.
When installing the new filter(s), note the direction of the air-
flow arrows on the filter frame.
If you have difficulty in locating your air filter(s), or if you
have questions concerning proper filter maintenance, con-
tact your dealer for instructions. When replacing filters, al-
ways use the same size and type of filter that was supplied
originally by the installer.
WARNING:
Never operate your unit without filter(s)
in place. Failure to heed this warning may result in dam-
age to the blower motor and/or compressor. An accumu-
lation of dust and lint on internal parts of your unit
can cause loss of efficiency and, in some cases, fire.
Table 1 — Indoor-Air Filter Data
UNIT SIZE
030,036
048,060
Filter Size (in.)
24 x 24
24 x 30
II. HEAT EXCHANGER
To ensure dependable and efficient heating operation, the heat
exchanger should be checked by a qualified maintenance per-
son before each heating season, and cleaned when necessary.
This checkout should not be attempted by anyone not having
the required expertise and equipment to properly do the job.
Checking and/or cleaning the heat exchanger involves remov-
ing the gas controls assembly and the flue collector box cover
and, when completed, reinstalling the gas controls assembly
for proper operation. Also, the flue collector box cover must
be replaced correctly so that a proper seal is maintained. Con-
tact your dealer for the required periodic maintenance.
III. FANS AND FAN MOTOR
Periodically check the condition of fan wheels and housings
and fan-motor shaft bearings. No lubrication of outdoor- or
indoor-fan bearings or motors is required or recommended.
IV. INDOOR AND OUTDOOR COILS
Cleaning of the coils should only be done by qualified service
personnel. Contact your dealer for the required annual
maintenance.
V. CONDENSATE DRAIN
The drain pan and condensate drain line should be checked
and cleaned at the same time the cooling coils are checked by
your dealer.
VI. COMPRESSOR
All compressors are factory-shipped with a normal charge of
the correct type refrigeration grade oil and should rarely re-
quire additional oil.
VII. OUTDOOR FAN
WARNING:
Do not poke sticks, screwdrivers, or any
other object into revolving fan blades. Severe bodily in-
jury may result.
The fan must be kept free of all obstructions to ensure proper
cooling. Contact your dealer for any required service.
VIII. ELECTRICAL CONTROLS AND WIRING
Electrical controls are difficult to check without proper in-
strumentation; therefore, if there are any discrepancies in the
operating cycle, contact your dealer and request service.
IX. REFRIGERANT CIRCUIT
The refrigerant circuit is difficult to check for leaks without
the proper equipment; therefore, if inadequate cooling is sus-
pected, contact your local dealer for service.
X. COMBUSTION AREA AND VENT SYSTEM
The combustion area and vent system should be inspected
visually before each heating season. The normal accumula-
tion of dirt, soot, rust, and scale can result in loss of effi-
ciency and improper performance if allowed to build up.
CAUTION:
If your unit makes an especially loud noise
when the main burners are ignited, shut down the gas
heating section and call your dealer.
See Fig. 2 and 3 and proceed as follows to inspect the com-
bustion area and power-venting system of your unit.
1. Turn off electrical power and gas supply to your unit.
2. Remove burner access panel.
3. Using a flashlight, carefully inspect the burner areas for
dirt, soot, rust, or scale.
CAUTION:
If dirt, soot, rust, or scale accumulations
are found, call your dealer and do not operate your heat-
ing section.
4. When you have completed your inspection, follow the
start-up procedures in this manual to restore your unit
to operation.
5. Observe unit heating and emergency heating operations.
WARNING:
Components in heat section may be hot
after unit has been started up. When observing flame,
be careful not to get close to or touch heating compo-
nents or serious personal injury may result.
Watch the burner flame to see if it is bright blue. If you
observe a suspected malfunction or if the burner flames
are not bright blue, call your dealer.
6. Replace burner access panel.
XI. UNIT PANELS
After performing any maintenance or service on the unit, be
sure all panels are fastened securely in place to prevent rain
from entering unit cabinet and to prevent disruption of the
correct unit airflow pattern.
—5—
Summary of Contents for 658A
Page 6: ...STEP 1 STEP 2 STEP 3 STEP 4 STEP 5 STEP 6 STEP 7 STEP 8 STEP 9 STEP 10 Fig 4 To Light Unit 6 ...
Page 7: ...STEP 1 STEP 2 STEP 3 STEP 4 STEP 5 STEP 6 STEP 7 Fig 5 To Shut Unit Off 7 ...
Page 9: ...DETACH AND MAIL PRODUCT REGISTRATION 9 ...
Page 10: ... 10 ...
Page 11: ... 11 ...
Page 12: ...Copyright 1995 Carrier Corporation CATALOG NO BDP 3365 801 ...