MAINTENANCE AND SERVICE
This section discusses maintenance that should be performed by your dealer and care you, as the owner, may wish to handle for your new system.
A. Routine Maintenance
All routine maintenance should be handled by skilled, experienced personnel. Your dealer can help you establish a standard proce- dure.
For your safety, keep the unit area clear and free of combustible materials, gasoline, and other flammable liquids and vapors.
To assure proper functioning of the unit, flow of condenser air must not be obstructed from reaching the unit. Clearance from the top of the unit is 48 in. Clearance of at least 36 in. is required on sides except the power entry side (42 in. clearance) and the duct side (12 in. minimum clearance).
B. Maintenance and Care for the Equipment Owner
Before proceeding with those things you might want to maintain yourself, please carefully consider the following:
WARNING: 1. TURN OFF ELECTRICAL POWER TO YOUR UNIT BEFORE SERVIC- ING OR PERFORMING MAINTE- NANCE. ELECTRIC SHOCK COULD CAUSE SERIOUS INJURY OR DEATH.
2.When removing access panels or performing mainte- nance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care is taken to keep sharp edges to a minimum, be extremely careful when handling parts or reaching into the unit.
AIR FILTERS
The 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.
This unit must have air filters in place before it can be operated. These filters can be located in one of at least two places. In many applications the installer will provide return air filter grilles mounted on the wall or ceiling of the conditioned structure. In the instance of filter grilles, the filters can simply be removed from the grille and replaced.
The other typical application is an accessory filter rack installed inside the unit itself. The following information is given to assist in changing filters used in these internal filter racks.
Table 1 indicates the correct filter size for your unit. Refer to Fig. 2 to access filters installed in the accessory filter rack.
TABLE 1—INDOOR-AIR FILTER DATA
UNIT SIZE | FILTER SIZE |
20x20x1 | |
704B036 | 20x24x1 |
24x30x1 |
To replace or inspect filters in accessory filter rack (See Fig. 2):
1.Remove the filter access panel using a
2.Remove the filter(s) by pulling it out of the unit. If the filter(s) is dirty, clean or replace with a new one.
When installing the new filter(s), note the direction of the airflow arrows on the filter frame.
If you have difficulty locating your air filter(s) or have questions concerning proper filter maintenance, contact your dealer for instructions. When replacing filters, always use the same size and type of filter that was supplied, originally, by the installer.
ACCESS PANEL
FILTER ACCESS
PANEL*
*For accessory filter rack.
C99094
Fig. 2—Accessory Filter Rack Access Panel
CAUTION: Never operate your unit without the filter(s) 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, a fire.
FANS AND FAN MOTOR
Periodically, check the condition of fan wheels and housings and
INDOOR AND OUTDOOR COILS
Cleaning of the coils should only be done by qualified service personnel. Contact your dealer for the required annual mainte- nance.
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
CONDENSER FAN
CAUTION: Do not poke sticks, screwdrivers, or any other objects into revolving fan blades. Injury or equip- ment damage 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 instrumen- tations. If there are any discrepancies in the operating cycle, contact your dealer and request service.