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Switches and senders in refrigerant circuit and related connections > < Connections with Schrader valve (needle valve)

A4 Mk1

Connections with primary sealing valve (ball valve)
Connections with primary sealing valve (ball valve)
  WARNING
Before unscrewing the connection, connect the air conditioner service station and extract refrigerant. The refrigerant circuit must be empty; danger of injury.
   
Connection with high-pressure valve
1 - Connection with internal thread (soldered in)
2 - O-ring (version and identification: black or coloured → Electronic parts catalogue)
3 - Valve with external thread and groove for O-ring (designation: ball valve)
4 - Seal for sealing cap
5 - Cap
  Note
t  Following connection, carefully screw the handwheel of the service coupling into the quick-release coupling adapter to the extent required to reliably open the valve in the service connection (observe the pressure gauge; take care not to open the valve too far).
t  To remove and install the valve -3- with the refrigerant circuit drained, make use of an adapter from the socket -T10364- for example.
t  There are different versions of these valves (with internal or external thread) and the tightening torques may therefore also differ. The tightening torque for the valves -3- used at present with an M12 x 1.5 mm external thread is 9 Nm 
+
-
 1 Nm.
t  There are different versions of these valves and the corresponding sealing caps. Attention is to be paid to the correct version of the valve and correct assignment of the sealing cap → Electronic parts catalogue.
  V87-1435
Connection with low-pressure valve
1 - Connection with external thread and groove for O-ring (soldered in)
2 - O-ring (version and identification: black or coloured → Electronic parts catalogue)
3 - Valve with internal thread
4 - Seal for sealing cap
5 - Cap
  Note
t  Carefully screw the handwheel of the service coupling into the quick-release coupling adapter to the extent required to reliably open the valve in the service connection (observe the pressure gauge; take care not to open the valve too far).
t  To remove and install the valve -3- with the refrigerant circuit drained, make use of an adapter from the socket -T10364- for example.
t  There are different versions of these valves (with internal or external thread) and the tightening torques may therefore also differ. The tightening torque for the valves -3- used at present with an M10 x 1.25 mm internal thread is 9 Nm 
+
-
 1 Nm.
t  There are different versions of these valves and the corresponding sealing caps. Attention is to be paid to the correct version of the valve and correct assignment of the sealing cap → Electronic parts catalogue.
  V87-1434

Switches and senders in refrigerant circuit and related connections > < Connections with Schrader valve (needle valve)