Bryant 558D Care And Maintenance, I. Air Filter, Service, I. Cleaning, A.Evaporator Coil

Whenever the evaporator fan is energized (during heating, cooling or continuous fan), 24-v power is on terminal IFO on the economizer or two-position damper control board. The damper motor will be energized with 12-vdc power and the damper will drive open until SW3 on the damper is deacti- vated. The damper motor will stop, and damper will remain in the minimum ventilation position until the evaporator fan is shut off. When the evaporator fan is shut off, the damper motor is again energized and the damper runs closed until SW2 is activated and the damper motor turns off.

CARE AND MAINTENANCE

To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic mainte- nance must be performed on this equipment. This combina- tion heating/cooling 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, me- chanical skills, tools, and equipment. If you do not pos- sess these, do not attempt to perform any maintenance on this equipment other than those procedures recom- mended in the User's Information Manual. FAILURE TO HEED THIS WARNING COULD RESULT IN SE- RIOUS PERSONAL INJURY AND POSSIBLE DAM- AGE TO THIS EQUIPMENT.

The minimum maintenance requirements for this equipment are as follows:

1.Inspect air ®lters each month. Clean or replace when necessary.

2.Inspect cooling coil, drain pan, and condensate drain each cooling season for cleanliness. Clean when necessary.

3.Inspect fan motor and wheel. Clean and lubricate as necessary.

4.Check electrical connections for tightness and controls for proper operation each heating and cooling season. Service when necessary.

5.Check and inspect accessory electric heaters before each heating season. Clean and adjust when necessary.

6.Check and clean outdoor-air inlet screen if needed.

WARNING: Failure to follow these warnings could re- sult in serious personal injury:

1.Turn off 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, per- sonal injury can result from sharp edges, etc.

3.Never place anything combustible either on, or in contact with, the unit.

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 Table 1 for recommended ®l- ter sizes.

Inspect air ®lters at least once each month and replace (throwaway-type) or clean (cleanable-type) at least twice dur- ing each heating and cooling season, or whenever the ®lter(s) becomes clogged with dust and lint.

When necessary, replace ®lters with the same dimensional size and type as originally provided.

SERVICE

CAUTION: When servicing unit, shut off all electri- cal power to unit to avoid shock hazard or injury from rotating parts.

I. CLEANING

Inspect unit interior at the beginning of each heating and cool- ing season and as operating conditions require.

A.Evaporator Coil

1.Turn unit power off. Remove evaporator coil access panel.

2.If accessory economizer is installed, remove economizer by disconnecting Molex plug and economizer mounting screws. Refer to Optional Economizer sections on page 13 or Accessory Economizer Installation Instruc- tions for further details.

3.Slide ®lters out of unit.

4.Clean coil using a commercial coil cleaner or dish- washer detergent in a pressurized spray canister. Wash both sides of coil and ¯ush with clean water. For best results, back¯ush toward return-air section to remove foreign material.

5.Flush condensate pan.

6.Reinstall economizer and ®lters.

7.Reconnect wiring.

8.Replace access panels.

B.Condenser Coil

Inspect coil monthly. Clean condenser coil annually, and as required by location or outdoor-air conditions.

One-Row Coils (sizes 036-060)

To access one-row coils, remove screws securing condenser- fan grille to condenser coil top cover. Place grille on top of condenser coil top cover as shown in Fig. 36. It is not neces- sary to remove the top cover.

Use a water hose or other suitable equipment to remove dirt and debris. Clean the outer surfaces with a stiff brush in the normal manner.

Reverse the procedure outlined above to reinstall the condenser- fan grille and condenser coil top cover.

Ð28Ð