Bryant 764A - Manual (Page 14)

CARE AND MAINTENANCE
NOTE: The following steps should be performed by a quali-
fied service person.
WARNING: Before installing or servicing unit, turn
off main power to system to avoid shock hazard or in-
jury from rotating parts. There may be more than one
disconnect switch. Turn off accessory heater power if ap-
plicable. Electrical shock can cause personal injury or
death.
To ensure continuing high performance, and to reduce the pos-
sibility of premature equipment failure, periodic main-
tenance must be performed on this equipment. Unit should
be inspected at least once each year by a qualified service
person.
NOTE TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
WARNING: The ability to properly perform mainte-
nance on this equipment requires certain expertise,
mechanical skills, tools, and equipment. If you do not
possess these, do not attempt to perform any mainte-
nance on this equipment other than those procedures
recommended in the User’s Manual. FAILURE TO HEED
THIS WARNING COULD RESULT IN SERIOUS PER-
SONAL INJURY AND POSSIBLE DAMAGE TO THIS
EQUIPMENT.
The minimum maintenance requirements for this equipment
are as follows:
1. Inspect air filter(s) each month. Clean or replace when
necessary.
2. Inspect condensing coil, drain pan, and condensate drain
each cooling season for cleanliness. Clean when
necessary.
3. Inspect evaporator-fan motor and wheel for cleanliness
each heating and cooling season. Clean when necessary.
For first heating season, inspect evaporator-fan motor
bimonthly to determine proper cleaning frequency.
4. Check electrical connections for tightness and controls
for proper operation each heating and cooling season.
Service when necessary.
5. Check the drain channel in the top cover periodically
for blockage (leaves, insects). Clean as needed.
WARNING: Failure to follow these warnings could re-
sult in serious personal injury:
1. Turn off all electrical power to the unit before per-
forming any maintenance or service on the unit.
2. Use extreme caution when removing panels and parts.
As with any mechanical equipment, personal injury
can result from sharp edges, etc.
3. Never place anything combustible either on, or in con-
tact with, the unit.
4. Should overheating occur, shut off all of the electri-
cal supply(s).
I. AIR FILTER
CAUTION: Never operate the unit without a suit-
able air filter in the return-air duct system. Always re-
place the filter with the same dimensional size and type
as originally installed. See Tables 1 and 2 for recom-
mended filter sizes.
Inspect air filter(s) at least once each month and replace
(throwaway-type) or clean (permanent-type) at least twice dur-
ing each cooling season or whenever the filter(s) becomes clogged
with dust and lint.
II. EVAPORATOR FAN AND MOTOR
NOTE: Motors without oilers are permanently lubricated. Do
not attempt to lubricate these motors.
For longer life, operating economy, and continued efficiency,
clean accumulated dirt and grease from the evaporator-fan
wheel and motor annually.
Lubricate the motor every 5 years if the motor is used inter-
mittently (thermostat FAN switch in AUTO. position), or
every 2 years if the motor is used continuously (thermostat
FAN switch in ON position).
WARNING: Disconnect and tag all electrical power to
the unit before cleaning the evaporator-fan and wheel.
Failure to adhere to this warning could cause personal
injury or death.
To clean the blower wheel:
1. Access the blower assembly as follows:
a. Remove top access panel.
b. Remove 3 screws that hold blower orifice ring to blower
housing. Save screws.
c. Loosen set screw(s) which secure wheel to motor shaft.
2. Remove and clean blower wheel as follows:
a. Lift wheel from housing. When handling and/or clean-
ing blower wheel, be sure not to disturb balance weights
(clips) on blower wheel vanes.
b. Remove caked-on dirt from wheel and housing with
a brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using a soft
brush attachment. Remove grease and oil with a mild
solvent.
c. Reassemble blower into housing. Place upper orifice
ring on blower to judge location of the blower wheel.
Blower wheel should be approximately .2 in. below
bottom of orifice ring when centered correctly. Be sure
set screws are tightened on motor and are not on round
part of shaft.
d. Set upper orifice ring in place with 3 screws removed
in Step 1.
e. Replace top access panel.
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