Friedrich WallMaster WCVT12B30A handleiding

Airco

Friedrich

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Handleiding

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R-32 SEALED SYSTEM REPAIRS

Compressor Replacement

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or

installation. Extreme care must be used, if it

becomes necessary to work on equipment with

power applied.

Failure to do so could result in serious injury or

death.

1. Be certain to perform all necessary electrical and refrigeration tests to be

sure the compressor is actually defective before replacing.

2. Recover all refrigerant from the system though the process tubes. Refer to

Refrigerant Removal, Recovery, and Evacuation Section of this manual).

PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA

REGULATIONS IS REQUIRED.

3. After all refrigerant has been recovered, cut and remove compressor.

Be certain to have both suction and discharge process tubes open to

atmosphere.

4. Carefully pour a small amount of oil from the suction stub of the defective

compressor into a clean container.

5. Using an acid test kit (one shot or conventional kit), test the oil for acid

content according to the instructions with the kit.

6. If any evidence of a burnout is found, no matter how slight, refer to

Com-

pressor Replacement -Special Procedure in Case of Compressor Burnout.

7. Install the replacement compressor.

CAUTION: Seal all openings on the defective compressor immediately.

Compressor manufacturers will void warranties on units received not

properly sealed. Do not distort the manufacturers tube connections.

8. Braze all connections. Refer to the Component Replacement/Brazing section

of this manual.

9. Charge system with proper amount of refrigerant per the model nameplate.

Refer to the Refrigerant charging section of this manual.

WARNING

EXPLOSION HAZARD

The use of nitrogen requires a pressure

regulator. Follow all safety procedures and

wear protective safety clothing etc.

Failure to follow proper safety procedures

could result in serious injury or death.

FREEZE HAZARD

Proper safety procedures must be followed,

and proper protective clothing must be worn

when working with liquid refrigerant.

Failure to follow these procedures could

result in minor to moderate injury.

CAUTION

WARNING

NEVER, under any circumstances,

liquid charge a rotary-compressor

through the LOW side. Doing so

would cause permanent damage to

the new compressor. Use a charging

adapter.

WARNING

HIGH PRESSURE HAZARD

Sealed Refrigeration System contains refrigerant

and oil under high pressure.

Proper safety procedures must be followed,

and PPE must be utilized

when working with refrigerants.

Failure to follow these procedures could

result in serious injury or death.

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