8
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 a nd lint on internal parts of your unit
can cause loss of efficiency and blower motor and/or
compressor damage.
!
CAUTION
RETURN
DUCT COVER
(Remove for
lter access)
SMALL CHASSIS
A10063
Fig. 9 -- Small Chassis Filter Access
LARGE CHASSIS
FILTER
ACCESS
PANEL
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 c leaned 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
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.
!
WARNING
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.
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 flow--control devices,
including solenoid valves.
!
WARNING
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 a ir 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 ef ficiency and improper
performance if allowed to build up. This inspection should be done
by a trained service person.
