3
Air
Filters
Theair filter(s) should bechecked every 3 or 4 weeksand changed
or cleaned whenever it becomes dirty. Dirty filters produce exces-
sivestresson theblowermotorand cancausethemotorto overheat
and shut down.
This unit must have air filters in place before it can be operated.
Thesefilterscan be located inone of atleast two pl aces.In manyap-
plications, the installer will provide return air filter grilles mounted
on the wall or ceiling oftheconditionedstructure.Intheinstanceof
filtergrilles,the filterscan simply be removed fromthegrille andre-
placed.
Theother typi calapplication isan 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.
Table1 indicatesthecorrectindoorfiltersize for yourunit. Referto
Fig. 2 to access filters installed in the accessory filter rack. If using
an Accessory Filter Rack refer to the Installation Instructions with
it for c orrect filter sizes and quantities.
Table 1—Indoor Air Filter Data
Unit Size Filter Size
704D018---030 20x24x1 (508x610x25 mm)
704D036 24x30x1 (610x762x25 mm)
704D042---060 24x36x1 (610x914x25 mm)
To replace or inspect filters in accessory filter rack (See Fig. 2):
1. Remove the filter access panel using a 5/16--in. nut dr iver.
2. Removethefilter(s)bypullingitoutoftheunit.Ifthefilter(s)
is dirty , clean or repl ace with a new one.
Wheninstallingthenew filter(s),notethedirection ofthe airflowar-
rows on the filter frame.
If you have difficulty locating your air filter(s) or have questions
concerning proper filter maint enance, contact your dealer for in-
structions.When r eplacing filters,alwaysusethesamesizeand type
of filter t hat was s upplied originally by the installer.
FIRE AND UNIT OPERATION HAZARD
Failureto follow thiswarning could result in personal injury,
death or property damage.
Never operate your unit without filters in place. A n
accumulation of dust and lintoninternalpartsof yourunitcan
cause loss of efficiency.
!
WARNING
ACCESS PANEL
FILTER ACCESS
PANEL*
*For accessory filter rack.
C99094
Fig. 2 -- Accessory Filter Rack Access Panel
(Optional Louvered Panels Shown)
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.
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 atthesametimethecooling coilsarecheckedby yourdeal-
er.
Compressor
Allcompressorsarefactoryshippedwithanormalchargeofthecor-
rect type of refrigeration grade oil. A compressor should rarely re-
quire additional oil.
Condenser
Fan
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failureto follow thiswarning could result in personal injury,
death or property damage.
Do not poke sticks, screwdrivers, or any other object into
revolving fan blades.
!
WARNING
The fan must bekept freeof all obstructionsto ensure propercool-
ing. Contact your dealer for any required service.
Electrical Controls and W
iring
Electricalcontrolsaredifficulttocheckwithoutproperinstrumenta-
tion. If there are any discrepancies in the operating cyc le, contact
your local dealer and request service.
Refrige rant
Circuit
Therefrigerantcircuitisdifficulttocheckforleakswithouttheprop-
erequipment.Ifinadequatecoolingissuspected,contactyour local
dealer for service.
