LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2020 >> SQ8 Premium Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 326 (Air Conditioning (Refrigerant R1234YF Servicing) (Refrigerant Circuit)) >> 87 Air Conditioning >> Refrigerant Circuit >> Refrigerant Circuit, Cleaning >> Adapter For Assembling Flushing Circuit >> Audi A8 (4N) from MY 2018

Audi A8 (4N) from MY 2018

WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle Required Adapters for the Connections to A/C Compressor Required Adapters for Connections to Receiver/Dryer / to Second Evaporator Miscellaneous
Audi A8 (4N) from MY 2018
  • Vehicle with one evaporator
 -- Compressor manufacturer "Denso" (block connections with radial sealing)
  • Low pressure side Refrigerant Circuits Adapter Set 1 - Adapter 12:VAS 6338/12  connected with the A/C Service Station and the Refrigerant Circuits Adapter Set - Adapter 48:VAS 6338/48 
  • High pressure side: Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS 6338/3 
 -- No adapter required, dryer is removed from receiver/dryer on condenser and the opening is sealed. The expansion valve is removed and Refrigerant Circuits Adapter Set 1 - Adapter 44:VAS 6338/44  is installed (or an old expansion valve is drilled on and installed as an adapter. Refer to PRELIMINARY WORK TO CLEAN REFRIGERANT CIRCUIT (FLUSHING WITH REFRIGERANT R1234YF)  and the Parts Information.
  • Additionally on vehicles with two evaporators (four zone A/C system)
   To flush the circuit with the evaporator in the front A/C unit
  • Refrigerant Circuits Adapter Set 1 - Adapter 44:VAS 6338/44  and Refrigerant Circuits Adapter Set 1 - Adapter 43:VAS 6338/43  (to seal the refrigerant circuit to the second evaporator)
 Expansion valve is removed from the evaporator in the front of the A/C unit and Refrigerant Circuits Adapter Set 1 - Adapter 44:VAS 6338/44  is installed. Expansion valve is removed from the refrigerant lines to the evaporator in the back of the A/C unit and Refrigerant Circuits Adapter Set 1 - Adapter 43:VAS 6338/43  is installed.
    To flush the second evaporator and corresponding lines
  • Refrigerant Circuits Adapter Set 1 - Adapter 44:VAS 6338/44  and Refrigerant Circuits Adapter Set 1 - Adapter 43:VAS 6338/43  (to seal the refrigerant circuit to the evaporator in the front of the A/C unit)
 Expansion valve is removed from the evaporator in the front of the A/C unit and Refrigerant Circuits Adapter Set 1 - Adapter 43:VAS 6338/43  is installed. Expansion valve is removed from the refrigerant lines to the evaporator in the back of the A/C unit and Refrigerant Circuits Adapter Set 1 - Adapter 44:VAS 6338/44  is installed.
NOTE:

In vehicles with two evaporators, the refrigerant circuit is flushed in two work steps.

On vehicles with two evaporators, the refrigerant circuit with the evaporator in the front of the A/C unit is flushed first. The refrigerant circuit to the second evaporator (in the rear A/C unit) must be blocked off so that the refrigerant flows in the specified direction during the flushing procedure. This is done by removing the expansion valve in the refrigerant lines to the second evaporator and installing the Flushing Adapter:VAS 6338/43  (closed adapter). After the refrigerant circuit with the evaporator is flushed, switch both adapters Refrigerant Circuits Adapter Set 1 - Adapter 43 Flushing Adapter:VAS 6338/43  and Refrigerant Circuits Adapter Set 1 - Adapter 44 Expansion Valve:VAS 6338/44  and flush the refrigerant circuit with the evaporator in the rear of the A/C unit.

scientia non olet · About LEMON Manuals