Instructions For Compressor Replacement

Instructions For Compressor Replacement


CAUTION:
When starting up a new compressor for the first time, it is absolutely essential to carry out the following breaking-in procedure:
- Switch on A/C system
- Set all air vents in instrument cluster to "OPEN"
- Start engine and let it stabilize at idle speed
- Set blower output to mm. 75 % of max. blower output
- Switch on A/C system and run for at least 2 minutes at idle speed (risk of damage at higher speed!)







When evacuating the air-conditioning system, refrigerant oil is also extracted and collected in the oil separator of the service station.

After evacuation, the refrigerant must be filtered in the service station as the oil separator could still contain a liquid refrigerant/oil mixture. The filtering process gasifies the refrigerant completely and only the previously bound refrigerant oil remains in the oil separator. Measure and note down this amount of refrigerant oil.








Externally regulated compressor:
The old compressor is drained via the filler plug.

Internally regulated compressor:
Place old compressor on its head and drain off contents completely into a measuring container.







Measure amount of refrigerant oil caught from old compressor.







Depending on its design, the new compressor is filled at the factory with 120 to 200 g refrigerant oil. Pour the entire contents of the compressor into a clean container.

Externally regulated compressor:
The new compressor is drained via the filler plug.

Installation Note: If necessary, replace gasket.

Observe tightening torque: Fill plug 30 Nm

Internally regulated compressor:
The new compressor is drained by turning it upside down.







From this refrigerant oil, pour the same amount (as drained from the old compressor) into a clean measuring container and then pour into the new compressor.

The remainder of the new refrigerant oil can be poured into the supply tank of the service station refer to Evacuating A/C system.

Otherwise the excess refrigerant oil must be disposed of correctly.

On account of its hygroscopic properties, refrigerant oil must not be stored in open containers.







The old refrigerant oil from the service station oil separator and from the old compressor must not be reused and must be disposed of correctly.







After installing the new compressor, it is essential before filling the A/C system to pour the same amount of the previously drawn off refrigerant oil into the system again, refer to Evacuating A/C system.

Installation Note: If A/C system is opened for more than 24 hours: Replace drier bottle/drier insert.