5
ROUTINE MAINTENANCE AND CARE
FOR THE EQUIPMENT OWNER
Consider the following information before maintaining or
servicing equipment:
Air Filter(s) —
Air filter(s) should be checked at least
every 3 or 4 weeks and changed or cleaned when necessary.
Table 1 indicates the correct filter size for your unit. See Fig. 4
for filter access panel location.
1. Lift up and remove filter access panel.
2. While holding filter, tilt upper filter rack.
3. Remove filters by pulling up and out toward you from the
track.
4. Inspect or replace filters.
5. Return filters t filter tracks. Note direction of airflow ar-
rows on filter frame.
6. Reinstall filter access panel.
If you have difficulty in locating your air filter or if you
have questions concerning proper filter maintenance, contact
your dealer for instructions. When replacing your unit filters,
always use the same size and type of filter that was originally
supplied by the installer.
Units with outdoor air capability have a cleanable filter for
the outdoor air. This filter should be checked semi-annually
and cleaned as necessary with steam or hot water and a mild
detergent. Do not use throwaway filters in place of cleanable
filters.
.
Table 1 — Indoor-Air Filter Data for 48HJ
NOTE: Replacement filters should be UL (Underwriters’ Laborato-
ries) certified or equivalent.
1. TURN OFF GAS SUPPLY AND THEN ELECTRI-
CAL POWER TO YOUR UNIT AND INSTALL
LOCKOUT TAG BEFORE SERVICING OR PER-
FORMING MAINTENANCE.
2. Do not turn off electrical power to this unit without
first turning off the gas supply.
3. When removing access panels or performing mainte-
nance functions inside your unit, be aware of sharp
sheet metal parts and screws. Although special care
has been taken to reduce sharp edges inside the unit,
be extremely careful when handling parts or reaching
into the unit.
4. Failure to follow these instructions could result in
serious injury or death.
Never operate your unit without filters in place. Failure to
heed this warning may result in damage to the blower
motor, compressor and/or evaporator coil. An accumula-
tion of dust and lint on internal parts of your unit can cause
loss of efficiency and, in some cases, fire that could result
in serious injury or death.
UNIT SIZE
48HJ
INDOOR-AIR FILTERS
(Throwaway Fiberglass)
Quantity
Size (in.)
004-007
2
16 x 25 x 2
008,009
4
16 x 25 x 2
012,014
4
20 x 20 x 2
FILTER ACCESS PANEL
Fig. 4 — Typical Filter Access Panel Location
(48HJ008-014 Shown)
