Friedrich WallMaster WCVT12B30A handleiding

Airco

Friedrich

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Handleiding

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R-32 SEALED SYSTEM REPAIRS

Compressor Replacement -Special Procedure in Case of Compressor Burnout

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.

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.

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.

1. Recover all refrigerant and oil from the system. Refer to Refrigerant Removal,

Recovery, and Evacuation Section

of this manual.

2. Cut and remove compressor and ﬁxed oriﬁce from the system.

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.

3. Flush evaporator condenser and all connecting tubing with dry nitrogen

or equivalent. Use A2L approved ﬂushing agent to remove all contamination

from system. Inspect suction and discharge line for carbon deposits. Remove

and clean if necessary. Ensure all acid is neutralized.

4. Reassemble the system, including a new metering device and strainers.

5. Install a dual port suction line drier on the common suction line and

remove when the pressure differential across the drier ports reaches 3 psi. or

greater.

6. Braze all connections. Refer to the Brazing section of this manual.

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

Refer to the refrigerant charging section of this manual.

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.

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