Volkswagen Golf 1999 Service Manual page 4065

Components, replacing
Components, replacing
- All components of the refrigerant circuit submitted for
quality observation are always to be sealed (use original
sealing caps of replacement part).
- To date, the following replacement 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)
refrigerant circuit .
- 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 cm
oil remains in the A/C compressor
working on refrigerant circuit
Note:
- As 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 spare part numbers). Sealing caps at replacement
part connections are therefore to be removed carefully and
the nitrogen gas allowed to escape slowly.
- The refrigerant circuit is installed either with a restrictor
and reservoir or an expansion valve and receiver.
- Seal open connections and pipes (to prevent absorption
of moisture).
- Always replace restrictor.
- Reservoir / receiver or desiccant bag/dryer cartridge must
not be replaced under the following conditions.
- After an accident, however there is no damage at
reservoir / receiver.
- Repairs are performed quickly (not beyond the normal
repair time) and no moisture has penetrated. Vehicle is not
older than 5 years.
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00-1, Basic rules for working on
00-1, Basic rules for
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of refrigerant
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13/2/2005