Audi A4 2001 - Mechanical Unit Mounting System

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pressor, Accumulator or Receiver - Circuit Contains Refriger‐
ant“, page 193 .
♦ Compressor, replacing without the need for flushing refriger‐
ant circuit, refer to
⇒ “5.3 Compressor, Replacing Without Flushing Refrigerant
Circuit“, page 193 .
♦ Compressor, replacing on account of leakage or internal dam‐
age, refer to
⇒ “5.4 Compressor, Replacing Due to Leakage Or Internal
Damage“, page 194 .
♦ Receiver or accumulator and restrictor, replacing after clean‐
ing refrigerant circuit, refer to
⇒ “5.5 Receiver or Accumulator and Restrictor, Replacing Af‐
ter Cleaning Refrigerant Circuit“, page 195
♦ Receiver or accumulator, replacing without the need for flush‐
ing refrigerant circuit, refer to
⇒ “5.6 Receiver or Accumulator, Replacing Without Flushing
Refrigerant Circuit“, page 196 .
♦ Dryer cartridge / dryer bag, replacing without the need for
flushing refrigerant circuit, refer to
⇒ “5.7 Dryer Cartridge and Dryer Bag, Replacing Without
Flushing Refrigerant Circuit“, page 197 .
1.4.3 Connections For Quick-Release Cou‐
pling On Refrigerant Circuit
• Only valves and connections that are resistant to refrigerant
R134a and refrigerant oil must be installed.
• Different connections (outer diameter) for high pressure and
low pressure side.
• Discharge refrigerant circuit before removing valves or valve
inserts.
• Always screw on sealing caps.
Allocation in the vehicle, refer to ⇒ Heating, Ventilation and Air
Conditioning; Rep. Gr. 87 ; Removal and Installation (vehicle-
specific repair manual).
♦ Connections with Schrader valve (needle valve), refer to
⇒ “2.1.4 Connections with Schrader Valve“, page 58 .
♦ Connections with primary sealing valve, (ball valve)
⇒ “2.1.5 Connections with Primary Sealing Valve (Ball Valve)“,
page 59 .
1.4.4 O-Ring Seals
♦ Make exclusive use of seals which are resistant to refrigerant
R134a and the related refrigerant oils. Color coding of O-rings
is no longer employed. Colored and black O-rings are used.
♦ Be sure to use seals with the correct inner diameter. Refer to
Electronic Parts Catalog (ETKA) and⇒ Heating, Ventilation
and Air Conditioning; Rep. Gr. 87 ; General Information (ve‐
hicle-specific repair manual).
♦ The O-rings may be used one time only.
♦ Coat the seals lightly with refrigerant oil (PAG oil) before in‐
stalling.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
24 Rep. Gr.00 - General, Technical Data