Connecting With Adapter Set Vag1785/10; Draining Refrigerant Circuit - Audi 100 1991 Repair Manual

Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
2.4.8 Connecting With Adapter Set -
VAG1785/10-
– Remove the cap from the connection with valve -A- (at A/C
compressor).
– Attach O-ring -B- to connection (8.9 mm; 1.8 mm).
– Screw adapter V.A.G 1785/10 -C- to connection -B-.
– Install valve opener -D- with appropriate seal in charging hose
connection.
Note
The type of valve opener -D- and seals required depends on
♦
charging hose used (specific to manufacturer).
The quick-release coupling adapter is not required for con‐
♦
nection on the low-pressure side of Audi vehicles.
Screw charging hose -E- (to service station) to Adapter - V.A.G
♦
1785/10- .
Note
To minimize the amount of air and moisture penetrating into the
charging hoses and thus into the refrigerant circuit, the charging
hoses should be connected together as illustrated.
A - Charging hose to service station
B - Hand shut-off valve
C - Charging hose (short version) with valve opener for connec‐
tion to adapter -D-
D - Adapter - V.A.G 1785/10-
E - Charging hose (short version) with quick-release coupling
adapter (for vehicles with quick-release coupling adapter on low-
pressure side).
– Perform planned tests and measurements.
2.4.9

Draining Refrigerant Circuit

• Work procedure may vary depending on the type of tools se‐
lected (the tool-specific operating instructions should therefore
be followed).
• The refrigerant circuit is to be discharged if parts of the refrig‐
erant circuit are to be removed, if there is any doubt about the
quantity of refrigerant in the circuit or if safety precautions so
require.
• All the necessary usage information for working with the re‐
frigerant service station can be found in the service station
operating instructions.
Draining
– Switch off the ignition.
– Connect service station in line with operating instructions to
vehicle service connections (refer to vehicle-specific refriger‐
ant circuit) and start up service station. Refer to ⇒ Heating,
Refrigerant R134a Servicing - Edition 01.2011
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2. Description and Operation
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