5
Air
Filters
The air filter(s) should be checked every 3 or 4 weeks and changed
or cleaned whenever it becomes dirty. Dirty filters produce exces-
sive 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 ap-
plications, 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 re-
placed.
The other typical application is an accessory filter rack installed in-
side the unit itself. The following information is given to assist in
changing filters used in these internal filter racks.
Table 1 indicates the correct indoor filter size for your unit. Refer
to Fig. 5 to access filters installed in the accessory filter rack. If using
an Accessory Filter Rack, refer to the Installation Instructions pro-
vided with it for correct filter sizes and quantities.
Ta ble 1—Indoor Air Filter Data
Unit Size Filter Size in. (mm)
A24040 20x20x1 (508x508x25)
A24060 and 30 20x24x1 (508x610x25)
A36 --- A42 24x30x1 (610x762x25)
A48 --- A60 24x36x1 (610x914x25)
Access Panels
Filter Access Panel
For Accessory Filter Rack
A09044
Fig. 5 -- Accessory Filter Rack Access Panel
To replace or inspect filters in accessory filter rack (See Fig. 5):
1. Remove the filter access panel using a 5/16--in. nut driver.
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 ar-
rows on the filter frame.
If you have difficulty locating your air filter(s) or have questions
concerning proper filter maintenance, contact your dealer for in-
structions. When replacing filters, always use the same size and type
of filter that was supplied originally by the installer.
FIRE AND UNIT OPERATION HAZARD
Failure to follow this warning could result in personal injury,
death or 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.
!
WARNING
Fans and Fan Mo tors
Periodically check the condition of fan wheels and housings and fan
motor shaft bearings. Contact your dealer for the required annual
maintenance.
Indoor and Outdoor
Coils
Cleaning of the coils should only be done by qualified service per-
sonnel. 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 coilsare checked by your deal-
er.
Compressor
Allcompressors are factory shipped with anormal chargeof thecor-
rect type and quantity 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 cool-
ing. Contact your dealer for any required service.
Electrical Controls and W
iring
Electricalcontrolsare difficultto check without properinstrumenta-
tion. If there are any discrepancies in the operating cycle, contact
your local dealer and request service.
Refrigerant
Circuit
Therefrigerantcircuitisdifficulttocheckforleaks without theprop-
er equipment. If inadequate cooling is suspected, contact your local
dealer for service.
EXPLOSION, BURN 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
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