Bryant 764A Care and Maintenance, AIR Filter, II. Evaporator FAN and Motor

CARE AND MAINTENANCE

NOTE: The following steps should be performed by a quali- ®ed 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 quali®ed 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 ®lter(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 ®rst 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 ®lter in the return-air duct system. Always re- place the ®lter with the same dimensional size and type as originally installed. See Tables 1 and 2 for recom- mended ®lter sizes.

Inspect air ®lter(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 ®lter(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 ori®ce 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 ori®ce ring on blower to judge location of the blower wheel. Blower wheel should be approximately .2 in. below bottom of ori®ce ring when centered correctly. Be sure set screws are tightened on motor and are not on round part of shaft.

d.Set upper ori®ce ring in place with 3 screws removed in Step 1.

e.Replace top access panel.

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