Instruction manual

f. Rinse and let dry. Oiling or coating of filters is not
recommended or required.
g. Reinstall filters.
h. Replace blower access door and turn on electrical supply
to furnace.
2. Upflow–filters installed in media cabinet adjacent to fur-
nace (See Fig. 6)
a. Turn off electrical supply to furnace
b. Remove filter cabinet door.
c. Slide filter out of cabinet.
d. If equipped with permanent, washable filter, clean filter
by spraying cold tap water through filter in opposite
direction of airflow. Rinse filter and let dry. Oiling or
coating of the filter is not recommended.
e. If equipped with factory-specified disposable media
filter, replace only with media filter having the same part
number and size.
f. Slide filter into cabinet.
g. Replace filter cabinet door.
h. Turn on electrical supply to furnace.
3. Upflow–filter(s) installed in side(s) and/or bottom of blower
compartment (See Fig. 6)
a. Turn off electrical supply before removing blower and
control access doors.
b. Release filter retainer from clip at front of furnace
casing. (See Fig. 6.) For side return, clips may be used
on either or both sides of the furnace.
c. Slide filter out.
d. Clean filters by spraying tap water through filter from
opposite direction of airflow.
e. Rinse and let dry. Oiling or coating of filter is not
recommended or required.
f. Place filter in furnace.
g. Replace blower and control access doors and turn on
electrical supply to furnace.
II. BLOWER MOTOR AND WHEEL
The following items should be performed by a qualified service
technician:
To ensure long life, economy, and high efficiency, clean accumu-
lated dirt and grease from blower wheel and motor annually.
The inducer and blower motors are pre-lubricated and require no
additional lubrication. These motors can be identified by the
absence of oil ports on each end of the motor.
Clean blower motor and wheel as follows:
1. Turn off electrical supply to furnace.
2. Remove blower access door.
Fig. 4—Horizontal Filter Arrangement
A94307
AIRFLOW
Fig. 5—Downflow Filter Arrangement
A88486
RETURN-AIR
PLENUM
AIRFLOW
ACCESS DOOR
INSTALLATION
POSITION
OF FILTERS
Fig. 6—Model 330AAV Upflow
A00293
BLOCKED
VENT
SAFEGUARD
FLUE
COLLECTOR
BOX
MOUNTING
SCREWS
RELIEF
BOX
CONTROL
FILTER
RETAINER
WASHABLE
FILTER
FURNACE
FLUE
COLLAR
PRESSURE
SWITCH
GAS
VALVE
C
OM
24V
HUM
GRYW
WASHABLE
FILTER OR
DISPOSIBLE
MEDIA FILTER
IN FILTER
CABINET
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