Refrigerant Circuit Connections With Switch Valve

WARNING: This page is about a different car, the 2022 Audi S3, 2022 Audi RS 3, 2022 Audi A3 Quattro, and 2022 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Switching pressures, removing and installing switches as well as switch arrangement and version. Refer to Refrigerant Circuit (vehicle-specific Service Information).

There are different threads for the switch on the high pressure and low pressure sides.
Only valves and seals that are resistant to refrigerant R1234yf and refrigerant oil must be installed. Refer to the Parts Information.

Fig 1: Exploded View Of Refrigerant Circuit Connections With Valve For Switches
Courtesy of AUDI OF AMERICA, LLC

A - Connection (soldered in)

B - Seal

C - Valve (with Seal)

NOTE:

To remove and install the valve insert -C- when the refrigerant circuit is discharged, use, for example, an adapter from the Refrigerant Sockets :T10364 (for the tightening specification, refer to QUICK-RELEASE COUPLING CONNECTIONS ON REFRIGERANT CIRCUIT ).

There are different versions of these valves and therefore there are different tightening specifications. Valve insert -C- with a VG5 (5.2 x 0.7 mm, tire valve) thread has a tightening specification of 0.4 Nm ± 0.1 Nm; a valve insert with a M6 x 0.75 mm thread has a tightening specification of 0.9 Nm ± 0.1 Nm, and a valve insert with a M8 x 1.0 mm thread has a tightening specification of 2.0 Nm ± 0.2 Nm.