3
Routine Maintenance
All routine maintenance should be handled by skilled, experienced
personnel. Your dealer can help you establish a standard procedure.
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. (1219 mm). Clearance of at least 36 in.(914
mm) is required on sides except the power entry side (42 in. [1067
mm] clearance) and the duct side (12 in. [305 mm] minimum
clearance).
Maintenance and Care for the Equipment Owner
Before proceeding with those things you might want to maintain
yourself, please carefully consider the following:
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CUT HAZARD
Failure to follow this warning could result in personal
injury, death or property damage.
1. TURN OFF ELECTRICAL POWER TO YOUR UNIT
BEFORE
SERVICING
OR
PERFORMING
MAINTENANCE.
2. When
removing
access
panels
or
performing
maintenance functions inside your unit, be aware of
sharp sheet metal parts and screws. Although special care
is taken to reduce sharp edges to a minimum, be
extremely careful when handling parts or reaching into
the unit. Wear safety glasses, glove, and appropriate pro-
tective clothing.
!
WARNING
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 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.
Filter kits are available as a purchased accessory or a factory
installed option. The same filter kit is included with the accessory
economizers and factory installed economizers. See Table 1 for
filter sizes supplied with accessory filter rack.
Table 1 – Replacement Filter Sizes
Unit Size
Filter Size
24
2 each 20 x 12 x 1
(508 x 305 x 25 mm)
30-36
2 each 20 x 12 x 1
(508 x 305 x 25 mm)
42-48
1 each 24 x 14 x 1 (610 x 356 x 25 mm),
24 x 16 x 1 (610 x 406 x 25 mm)
60*
1 each 24 x 16 x 1 (610 x 406 x 25 mm),
24 x 18 x 1 (610 x 457 x 25 mm)
*Units with bent indoor coil.
To replace or inspect filters in accessory filter rack (See Fig. 2):
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
arrows on the filter frame, which should be pointed at the indoor
coil.
3. Reinstall filter access panel ensuring opening is air and
water tight.
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.
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.
!
CAUTION
COMPRESSOR
ACCESS PANEL
BLOWER
ACCESS
PANEL
CONTROL
ACCESS
PANEL
A170032
Fig. 2 -- Unit Access Panel
RETURN
DUCT COVER
(Remove for
filter access)
SMALL CHASSIS
A10063
Fig. 3 -- Small Chassis Filter Access
