!CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution may result in property damage.
Never operate your unit without filters in place. An accumulation of dust and lint on internal parts of your unit can cause loss of efficiency and blower motor and/or compressor damage.
RETURN
DUCT COVER 
(Remove for 
filter access)
SMALL CHASSIS
A10063
Fig. 9 - Small Chassis Filter Access
FILTER |
ACCESS |
PANEL |
LARGE CHASSIS
A10062
Fig. 10 - Large Chassis Filter Access
Fans and Fan Motors
Periodically check the condition of fan wheels and housings and fan motor shaft bearings. Contact your dealer for the required annual maintenance.
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 attempted by anyone not having the required expertise and equipment to properly do the job. Contact your dealer for the required periodic maintenance.
Indoor and Outdoor Coils
Cleaning of the coils should only 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 shipped with a normal charge of the correct type of refrigeration grade oil. A compressor should rarely require additional oil.
Condenser (Outdoor) Fan
!WARNING
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal injury, death or property damage.
Do not insert sticks, screwdrivers, or any other objects into revolving fan blades.
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. If there are any discrepancies in the operating cycle, contact your local dealer and request service.
Refrigerant Circuit
The refrigerant circuit is difficult to check for leaks without the proper equipment. If inadequate cooling is suspected, contact your local dealer for service.
!WARNING
EXPLOSION AND ENVIRONMENTAL HAZARD
Failure to follow this warning could result in personal injury, death or property damage.
System under pressure. Relieve pressure and recover all refrigerant before system repair or final unit disposal. Use all service ports and open all
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.
Combustion Area and Vent System
For proper and safe operation, the furnace needs air for combustion and ventilation. The air openings, on the furnace, the air openings to the area in which the furnace is installed, and the spacing around the furnace must not be blocked or obstructed.
The combustion area and vent system should be inspected visually before each heating season. The normal accumulation of dirt, soot, rust, and scale can result in loss of efficiency and improper performance if allowed to build up. This inspection should be done by a trained service person.
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