ROUTINE MAINTENANCE
All routine maintenance should be handled by skilled, ex- perienced personnel. Your dealer can help you establish a standard procedure.
For your safety, keep the unit area clear and free of com- bustible materials, gasoline, and other ¯ammable liquids and vapors.
To assure proper functioning of the unit, ¯ow of combus- tion and ventilating air must not be obstructed from reaching the unit. Clearance of at least 30 in. is required on all sides except the duct side.
MAINTENANCE AND CARE FOR THE
EQUIPMENT OWNER
Before proceeding with those things you might want to maintain yourself, please carefully consider the following:
1.TURN OFF GAS SUPPLY AND ELECTRICAL POWER TO YOUR UNIT BEFORE SERVICING OR PERFORMING MAINTENANCE.
2.Do not turn off electrical power to this unit without ®rst turning off the gas supply.
3.When removing access panels or performing main- tenance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care is taken to reduce sharp edges to a minimum, be ex- tremely careful when handling parts or reaching into the unit.
Air Filters Ð Air ®lter(s) should be checked at least ev- ery 3 or 4 weeks and changed or cleaned whenever it be- comes dirty. Dirty ®lters produce excessive stress on the blower motor and can cause the motor to overheat and shut down. Table 1 indicates the correct ®lter size for your unit. Refer to Fig. 5 to access the ®lter(s).
To replace or inspect ®lter(s) (or accessory ®lter rack when supplied):
1.Remove the ®lter access panel using a
2.Remove the ®lter(s) by pulling the ®lter(s) out of the unit. If the ®lter(s) is dirty, clean or replace with new one.
When installing the new ®lter(s), note the direction of the air¯ow arrows on the ®lter frame.
If you have difficulty in locating your air ®lter(s), or if you have questions concerning proper ®lter maintenance, con- tact your dealer for instructions. When replacing ®lters, al- ways use the same size and type of ®lter that was supplied originally by the installer.
Table 1 Ð Indoor-Air Filter Data*
UNIT SIZE | FILTER SIZE |
20x20 | |
20x24 | |
24x30 | |
20x20 | |
48GX036 | 20x24 |
24x30 |
*For ®lter grille installations only.
Never operate your unit without ®lters 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 ef- ®ciency and, in some cases, ®re.
Heat Exchanger Ð To ensure dependable and efficient heating operation, the heat exchanger should be checked by a quali®ed maintenance person 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 removing the gas controls as- sembly and the ¯ue collector box cover and, when com- pleted, reinstalling the gas controls assembly for proper op- eration. Also, the ¯ue collector box cover must be replaced correctly so that a proper seal is maintained. Contact your dealer for the required periodic maintenance.
Fans and Fan Motor Ð Periodically check the con- dition of fan wheels and housings and
Evaporator and Condenser Coils Ð Cleaning of the coils should only be done by quali®ed service per- sonnel. Contact your dealer for the required annual maintenance.
Condensate Drain Ð 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 Ð All compressors are
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 en- sure proper cooling. Contact your dealer for any required service.
Fig. 2 Ð Gas Heating/Electric Cooling Unit
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