Components, Replacing

Components, Replacing

- All components of the refrigerant circuit submitted for quality observation are always to be sealed (use original sealing caps of original part).
- To date, the original parts (compressor, reservoir, receiver, evaporator and condenser) have been filled with nitrogen gas. This charge is being gradually discontinued/the pressure of the nitrogen charge is now so low that escape of gas is no longer perceptible on initial opening.
- On vehicles installed with a compressor with no A/C clutch, the engine is only to be started following complete assembly of the refrigerant circuit (compressor always in operation as well).
- So that the compressor with A/C Compressor Regulator Valve N280 (without A/C clutch) is not damaged when the refrigerant circuit is empty, it is equipped with a secured oil supply. This means that approx. 40 to 50 cu.cm of refrigerant oil remains in the A/C compressor.

NOTE:
- As original parts are sometimes stored for lengthy periods and at different locations within the spare parts organization, it is entirely possible that gas will escape from some parts and not from others on initial opening (even in the case of identical original part numbers). Sealing caps at original part connections are therefore to be removed carefully and the nitrogen gas allowed to escape slowly.
- The refrigerant circuit is equipped either with a restrictor and accumulator or with an expansion valve and receiver.
- Seal open connections and pipes (to prevent absorption of moisture).
- Always replace restrictor or expansion valve.
- The reservoir/fluid reservoir or dryer bag/cartridge should not be replaced under the following conditions.
- After an accident when there is no damage on the reservoir/fluid reservoir.
- The repair was done quickly (not beyond the normal repair time) and no moisture has entered. The vehicle is not older than 5 years.
- The reservoir/fluid reservoir or dryer cartridge should be replaced under the following conditions.
- The refrigerant circuit was opened and the vehicle is older than 5 years.
- The refrigerant circuit has been opened for an indefinite period of time (slow leak).
- The repair exceeded the normal repair time and moisture has entered.
- Always replace reservoir/fluid reservoir or dryer cartridge after flushing with compressed air or refrigerant R134a. Keep original part closed as long as possible to minimize moisture absorption.
- The A/C compressor has locked up.
- The reservoir/fluid reservoir is damaged (accident).

CAUTION: For instructions on handling refrigerant oil, refer to Volkswagen After Sales; ServiceNet; handbooks; HSO; Volume 2; emission protection; refrigerant from A/C system / refrigerant oil.