Adapter For Assembling The Flushing Circuits, PASSAT GTE: Notes

WARNING: This page is about a different car, the 2023 Volkswagen Atlas. However, it is still accessible from the selected car via links, so may be relevant.

Required adapters for the connections to A/C compressor	Adapters necessary for the connections to the reservoir or receiver/dryer	Miscellaneous
Refrigerant Circuit, Cleaning: Low pressure side: Refrigerant Circuits Adapter Set 1 - Adapter 12:VAS 6338/12 connected to the A/C Service Station and the Refrigerant Circuit Adapter Set - Adapter:VAS 6338/48 High pressure side: Rinsing Adapter:VAS 6338/3A	Different versions:-- No adapter is necessary, the receiver/dryer is integrated into the condenser.-- Depending on the condenser version, remove the dryer cartridge from the receiver/dryer on the condenser before flushing and then seal the opening again (see note).	Expansion valve: Rinsing Adapter:VAS 6338/38A Heater and A/C Unit Refrigerant Shut-Off Valve -N541- ; install the Shut-off Valves:VAS 6338/42 Remove the High-Voltage Battery Heater Core Refrigerant Shut-Off Valve -N542- and install the Shut-off Valves:VAS 6338/42 . The restrictor in the refrigerant line to the high-voltage battery heat exchanger is removed or the refrigerant line is drilled. Refer to Prepare the old restrictor for flushing: . Replace after flushing. Replace the Heater and A/C Unit Refrigerant Shut-Off Valve -N541- and High-Voltage Battery Heater Core Refrigerant Shut-Off Valve -N542- after flushing
Clean the A/C compressor: Low-pressure side: Refrigerant Circuit Adapter Set - Adapter:VAS 6338/48 , Refrigerant Circuits Adapter Set 1 - Adapter 41:VAS 6338/41A High pressure side: Refrigerant Circuits Adapter Set 1 - Adapter 40:VAS 6338/40A

For this vehicle the refrigerant circuit is flushed by diving it into two sections. During the first flushing cycle, the Shut-off Valves:VAS 6338/42 , which is installed instead of the Heater and A/C Unit Refrigerant Shut-Off Valve -N541-, is open. The Shut-off Valves:VAS 6338/42 , which is installed instead of the High-Voltage Battery Heater Core Refrigerant Shut-Off Valve -N542-, is closed. Thus the refrigerant circuit with the evaporator in the A/C unit is flushed. During the second flushing cycle, the Shut-off Valves:VAS 6338/42 , which is installed instead of the Heater and A/C Unit Refrigerant Shut-Off Valve -N541-, is closed. The Shut-off Valves:VAS 6338/42 , which is installed instead of the High-Voltage Battery Heater Core Refrigerant Shut-Off Valve -N542-, is open. The refrigerant circuit with the evaporator in the high-voltage battery heat exchanger is flushed as a result. Refer to Refrigerant Circuit .
The Heater and A/C Unit Refrigerant Shut-Off Valve -N541- and the High-Voltage Battery Heater Core Refrigerant Shut-Off Valve -N542- must be replaced after flushing.