• Make exclusive use of tools and materials intended for refrig‐
erant R134a.
• Seal opened refrigerant oil containers to guard against mois‐
ture.
Note
♦
After engine all service work, screw sealing caps (with seals)
onto all connections with valve and service connections.
♦
Before starting up A/C system. Observe vehicle specific filling
capacities, refer to
⇒ “3.2 Refrigerant R134a Capacities“, page 94 .
♦
Do not fill refrigerant, extract refrigerant present and refill the
system.
1.4.2 Component Replacement
• 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 (A/C compressor,
accumulator, receiver, evaporator and condenser) have been
filled with nitrogen gas. This charging stops gradually or the
charging pressure is so low that gas does not escape notice‐
ably when 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) .
• When the refrigerant circuit is empty, the A/C compressor with
A/C compressor regulator valve -N280- (without A/C clutch) is
switched to internal lubrication with the result that only a min‐
imal amount of oil is pumped from the compressor into the
circuit.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
22 Rep. Gr.00 - General, Technical Data
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