Air Filter Cleaning And Replacement; Blower Motor And Wheel Maintenance - Bryant 349HAV Service And Maintenance Procedures Manual

The minimum maintenance that should be performed on this
equipment is as follows:
1. Check and clean or replace air filter each month, or as
required. (See Air Filter Cleaning and Replacement sec-
tion.)
2. Check blower motor and wheel for cleanliness and lubrica-
tion each heating and cooling season. Clean and lubricate as
necessary. (See Blower Motor and Wheel Maintenance
section.)
3. Check electrical connections for tightness and controls for
proper operation each heating season. Service as necessary.
4. Check heat exchanger, gas burners, and venting system
each year, prior to heating season.
CAUTION: As with any mechanical equipment, per-
sonal injury could result from sharp metal edges, etc. Be
careful when removing parts, panels, or components.
I. AIR FILTER CLEANING AND REPLACEMENT
The air filter arrangement may vary depending on application. The
filter is normally located in return-air plenum opening in front of
blower. (See Fig. 2.)
SPEED
SELECTOR
Fig. 2—Blower Compartment
TABLE 1—HORIZONTAL FURNACE FILTERS
UNIT FILTER QTY AND SIZE
SIZE (IN.)
036050 (1) 13 X 23 X 1/2
036075 (1) 13 X 23 X 1/2
048075 (1) 13 X 23 X 1/2
048100 (1) 16-1/2 X 23 X 1/2
060100 (1) 16-1/2 X 23 X 1/2
060125 (1) 20 X 23 X 1/2
CAUTION: Never operate unit without a filter or with
filter access door removed. Failure to follow this warning
could result in a fire or personal injury.
FILTER
BLOWER SUPPORT
SCREWS (2)
BRACKET
A91175
FILTER TYPE
Cleanable
Cleanable
Cleanable
Cleanable
Cleanable
Cleanable
If the permanent, washable filter and wire filter retainer option has
been installed, clean or replace the filter as follows:
1. Turn off electrical supply to unit.
2. Remove blower access door located at inlet (return air) end
of furnace by removing 4 screws.
3. Bend wire filter retainer until it clears furnace flange and
swing flange toward the blower.
4. Remove filter from furnace. If filter is torn, replace it.
5. Clean permanent, washable filters by spraying cold tap
water through filter in opposite direction of airflow. A mild
liquid detergent may be used if necessary.
6. Rinse filters and let dry. Oiling or coating of filters is not
recommended or required for factory-supplied filters.
7. Reinstall filters with cross-mesh binding facing blower.
8. Replace blower access door and reinstall 4 screws.
9. Turn on electrical supply to furnace.
II. BLOWER MOTOR AND WHEEL MAINTENANCE
For long life, economy, and high efficiency, clean accumulated dirt
and grease from blower wheel and motor annually.
The following items should be performed by a qualified service
technician:
Some motors have prelubricated, sealed bearings and require no
lubrication. These motors can be identified by the absence of oil
ports on each end of motor. For motors with oil ports, lubricate
motor every 5 years if motor is used for intermittent operation
(thermostat FAN control set to AUTO), or every 2 years if motor
is in continuous operation (thermostat FAN control set to ON).
Clean and lubricate as follows:
AIR
1. Turn off electrical supply to unit.
FLOW
2. Remove blower access door by removing 4 screws.
3. Remove blower assembly.
a. Remove 4 screws securing front blower support bracket
and remove bracket. (See Fig. 2.)
b. Reach through 4-in. diameter holes in rear blower
support bracket and remove 2 screws securing bracket to
blower shelf using a 3/8-in. ratchet with a 3-in. exten-
sion. (See Fig. 2.)
c. Disconnect motor leads from motor speed selector. (See
Fig. 2.)
d. Remove blower assembly from unit.
4. Mark blower wheel location on shaft before disassembly to
ensure proper reassembly.
5. Loosen setscrew holding blower wheel on motor shaft.
6. Disconnect ground wire from blower housing.
7. Remove bolts holding motor mount to blower housing and
slide motor and mount out of housing.
8. Lubricate motor (when oil ports are provided).
a. Remove dust caps or plugs from oil ports located at each
end of motor. If motor does not have these caps or plugs,
bearings are sealed and need no further lubrication.
b. Use a good grade of SAE 20 nondetergent motor oil and
add 1 teaspoon (5 cc, 3/16 oz, or 16 to 25 drops) in each
oil port. The use of other types or grades of oil will
damage motor. Excessive oiling can cause premature
bearing failures.
c. Allow time for total quantity of oil to be absorbed by
each bearing.
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