Bryant 580G manual Service, Cleaning, II. Lubrication

SERVICE

WARNING: Before beginning any maintenance, be sure to turn off power at the main disconnect switch.

TAG THE SWITCH WITH A SUITABLE WARNING LABEL.

All unit components can be reached through clearly labelled hinged access doors. These doors are not equipped with tie- backs, so if heavy duty servicing is needed, either remove them or prop them open to prevent accidental closure.

Each door is held closed with 3 latches. The latches are se- cured to the unit with a single 1¤4-in. - 20 x 1¤2-in. long bolt. See Fig. 39.

To open, loosen the latch bolt using a 7¤16-in. wrench. Pivot the latch so it is not in contact with the door. Open the door. To shut, reverse the above procedure.

NOTE: Disassembly of the top cover may be required under special service circumstances. It is very important that the orientation and position of the top cover be marked on the unit prior to disassembly. This will allow proper replacement of the top cover onto the unit and prevent rainwater from leaking into the unit.

IMPORTANT: After servicing is completed, make sure door is closed and relatched properly, and that the latches are tight. Failure to do so can result in water leakage into the evapo- rator section of the unit.

Fig. 39 Ð Door Latch

I. CLEANING

Inspect unit interior at beginning of each heating and cool- ing season and as operating conditions require. Remove unit top panel and/or side panels for access to unit interior.

A. Evaporator Coil

Clean as required with a commercial coil cleaner.

B. Condenser Coil

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

C. Condensate Drain

Check and clean each year at start of cooling season. In win- ter, keep drains and traps dry.

D. Filters

Clean or replace at start of each heating and cooling season, or more often if operating conditions require. Refer to Table 1 for type and size.

NOTE: The unit requires industrial grade throwaway ®lters capable of withstanding face velocities up to 625 fpm.

To replace ®lters, open ®lter access door (marked with label). Remove inner access panel. Remove plastic ®lter retainer in between ®lter tracks by sliding and pulling outward. Remove ®rst ®lter by sliding out opening in ®lter track. Locate ®lter removal tool, which is shipped next to the return air damp- ers. Use the ®lter removal tool to remove the rest of the ®lters.

E. Main Burners

At the beginning of each heating season, inspect for deterio- ration or blockage due to corrosion or other causes. Observe the main burner ¯ames and adjust if necessary. Refer to Main Burners sections on page 28. Check spark gap. See Fig. 40.

F. Flue Gas Passageways

The ¯ue collector box and heat exchanger cells may be inspected by removing gas section access panel (Fig. 2 and 3), ¯ue box cover, collector box, and main burner assembly (Fig. 41 and 42). Refer to Main Burners section on page 28 for burner removal sequence. If cleaning is required, clean all parts with a wire brush. Reassemble using new cerafelt high-temperature insulation for sealing.

G. Combustion-Air Blower

Clean periodically to assure proper air¯ow and heating effi- ciency. Inspect blower wheel every fall and periodically dur- ing heating season. For the ®rst heating season, inspect blower wheel bi-monthly to determine proper cleaning frequency.

To inspect blower wheel, remove heat exchanger access panel. Shine a ¯ashlight into opening to inspect wheel. If cleaning is required, remove motor and wheel assembly by removing screws holding motor mounting plate to top of combustion fan housing (Fig. 41 and 42). The motor, scroll, and wheel assem- bly can be removed from the unit. Remove scroll from plate. Remove the blower wheel from the motor shaft and clean with a detergent or solvent. Replace motor and wheel assembly.

H. Outdoor-Air Inlet Screens

Clean screens with steam or hot water and a mild detergent. Do not use throwaway ®lters in place of screens.

II. LUBRICATION

A. Compressors

Each compressor is charged with the correct amount of oil at the factory. The correct oil charge is shown in Table 1. If oil is visible in the compressor sight glass, check unit for operating readiness as described in Start-Up section, then start the unit. Observe oil level and add oil, if required, to bring oil level in compressor crankcase up to between 1¤4 and 1¤3 of sight glass during steady operation.

If oil charge is above 1¤3 sight glass, do not remove any oil until the compressor crankcase heater has been energized for at least 24 hours with compressor off.

When additional oil or a complete charge is required, use only approved compressor oils:

Petroleum Specialties, Inc. . . . . . . . . . . . . . . . . . . . Cryol 150

Texaco, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . Capella WF-32

Witco Chemical Corp. . . . . . . . . . . . . . . . . . . . . . Suniso 3GS

IMPORTANT: Do not use reclaimed oil or oil that has been exposed to the atmosphere. Refer to Standard Service Tech- niques Manual, Chapter 1, Refrigerants section, for proce- dures to add or remove oil.

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