Air Filter(s) — Air filter(s) should be checked at least ev- ery 3 or 4 weeks and changed or cleaned when necessary. Table 1 indicates the correct filter size for your unit. See Fig. 4 for filter access door location.
To replace or inspect filters:
1.Lift up and remove filter access panel.
2.While holding filter, tilt upper filter rack.
3.Remove filters by pulling up and out toward you from the track.
4.Inspect or replace filters.
5.Return filters to filter track. Note direction of airflow arrows on filter frame.
6.Replace filter access panel.
If you have difficulty in locating your air filter, or if you have questions concerning proper filter maintenance, contact your dealer for instructions. When replacing your unit filters, always use the same size and type of filter that was originally supplied by the installer.
Units with outdoor air capability have a cleanable filter for the outdoor air. This filter should be checked annually and cleaned as necessary with steam or hot water and a mild deter- gent. Do not use throwaway filters in place of cleanable filters.
Never operate your unit without filters in place. Failure to heed this warning may result in damage to the blower motor and/or compressor. An accumulation 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 | |||
(Throwaway Fiberglass) | |||
48TF,TM | |||
Quantity | Size (in.) | ||
| |||
2 | 16 x 25 x 2 | ||
008, 009 | 4 | 16 x 20 x 2 | |
012, 014 | 4 | 20 x 20 x 2 | |
NOTE: Replacement filters should be UL (Underwriters’ Laborato- ries) certified or equivalent.
Heat Exchanger — To ensure dependable and efficient heating operation, the heat exchanger should be checked by a qualified maintenance person before each heating season, and cleaned when necessary. This checkout should not be attempt- ed by anyone not having the required expertise and equipment to do the job properly. Checking and/or cleaning the heat exchanger involves removing 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. Contact your dealer for the required period- ic maintenance.
Fans, Belts and Fan Motor — Periodically check the condition of the fan wheels and housings, belt tension and fan motor shaft bearings. No lubrication of condenser or evapora- tor fan bearings or motors is required or recommended.
Evaporator and Condenser Coils — Cleaning of the coils should be done by qualified service personnel. Contact your dealer for the required annual maintenance.
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.
Compressor — All compressors are factory supplied with a normal charge of the correct type
Condenser Fan
Do not poke sticks, screwdrivers, or any other object into revolving fan blades. Severe bodily injury may result.
The fan must be kept free of all obstructions to ensure proper cooling. Contact your dealer for any required service.
Electrical Controls and Wiring — Electrical controls are difficult to check without proper instrumentation; therefore, if there are any discrepancies in the operating cycle, contact your dealer and request service.
Refrigerant Circuit — The refrigerant circuit is difficult to check for leaks without the proper equipment; therefore, if inadequate cooling is suspected, contact your local dealer for service.
FILTER ACCESS PANEL
Sizes | Sizes |
Fig. 4 — Typical Filter Access Panel Location
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