LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 513 (Refrigerant R134A Servicing (1 Of 2) (Sedan)) >> 87 Air Conditioning >> Refrigerant Circuit >> Refrigerant Circuit, Cleaning (Flushing), With Refrigerant R134A >> Flushing Circuit Block Diagrams

Flushing Circuit Block Diagrams

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2016 Audi S4, 2016 Audi A4 Quattro, 2016 Audi A4, 2015 Audi S4, and 2015 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

The arrows in the following illustrations show the direction of refrigerant flow during flushing (refrigerant flows in opposite direction of flow when Air Conditioning (A/C) system is in operation while flushing, therefore the high pressure side of the A/C service system is connected to the low pressure connection of the refrigerant circuit to the A/C compressor).

These block diagrams indicate a refrigerant circuit with restrictor and reservoir and a refrigerant circuit with expansion valve, receiver/dryer and a second evaporator (optional equipment on certain vehicles)

Depending on the construction of the A/C service station, check valves may be installed between the refrigerant circuit and the A/C service station (to guarantee the correct direction of refrigerant flow during flushing).

Refrigerant Circuit with Restrictor and Reservoir

NOTE:

On vehicles with a restrictor and reservoir, the restrictor and reservoir are removed, the lines disconnected for removing the restrictor are reconnected. The pipe connections to the removed reservoir are connected with each other via two adapters and the Refrigerant Circuits Adapter Set 2 - Adapter 31 VAS6338/31 (from the Refrigerant Circuits Adapter Set 1 VAS6338/1).

Fig 1: Block Diagram For Flushing Circuits (Type 1)
GWWA87-10135Courtesy of AUDI OF AMERICA, LLC
  1. A/C Service Station
    • With electronics and a flushing program, for example A/C Service Station With Flushing Device. (Refer to Tools; Special Tools and Equipment: A/C and Heating).
    • If an A/C service station without a flushing program is used, the procedure must be performed manually (evacuate, flush three times with at least 4 kg refrigerant each and extract refrigerant again, evacuate).
  2. A/C Service Station Refrigerant Hose
    • From high pressure side of A/C service station (mostly colored red) to low pressure side connection of A/C compressor on refrigerant circuit (larger diameter).
  3. Adapter for Connecting Low Pressure Side to Refrigerant Circuit
  4. Low Pressure Side Connection on Refrigerant Circuit
  5. Connection to Reservoir
  6. Adapter for Bridging the Removed Reservoir
  7. Refrigerant Charge Hose
  8. Adapter for Bridging the Removed Reservoir
  9. Connection to Reservoir
  10. Evaporator
  11. Component Location of Restrictor
    • Restrictor is removed.
    • Remove the restrictor. Refer to RESTRICTOR  (vehicle-specific repair information).
  12. Bolts in Refrigerant Line
    • Bolt together again after removing restrictor. Refer to RESTRICTOR  (vehicle-specific repair information).
  13. Condenser
  14. High Pressure Side Connection on Refrigerant Circuit
  15. Adapter to Connection for High Pressure Side on Refrigerant Circuit
  16. Charge Hose for Refrigerant Circuit Flushing Device
    • From connection to the high pressure side of the A/C compressor on the refrigerant circuit (smaller diameter) to input of refrigerant circuit flushing device.
  17. Flushing Equipment for Refrigerant Circuits
    • There are different versions of the Refrigerant Circuit Flushing Device. (Refer to Tools; Special Tools and Equipment: A/C and Heating).
    • With filter, viewing glass, safety valve, heating, refrigerant container etc. (depending on version).
    • Depending on the construction of the A/C service station and of refrigerant circuit flushing device, a check-valve may be installed at output of refrigerant circuit flushing device (to guarantee correct direction of refrigerant flow during flushing).
  18. A/C Service Station Refrigerant Hose
    • From the low pressure side of the service station (mostly blue) to the output of the flushing device for refrigerant circuits.

Refrigerant Circuit with Expansion Valve, Receiver/Dryer and Second Evaporator

NOTE:

This block diagram shows a refrigerant circuit with expansion valve, receiver/dryer and second evaporator (optional equipment on certain vehicles).

On vehicles with an expansion valve and receiver/dryer, the expansion valve is removed and replaced by an adapter. Depending on the vehicle, the receiver/dryer must also be removed and line connections to fluid reservoir be connected to each other by two adapters and a charge hose.

On a vehicle with only one evaporator, components from item "16" are not present or are not needed.

Fig 2: Block Diagram For Flushing Circuits (Type 1)
GWWA87-10131Courtesy of AUDI OF AMERICA, LLC
  1. A/C Service Station
    • With electronics and a flushing program, A/C Service Station With Flushing Device. (Refer to Tools; Special Tools and Equipment: A/C and Heating).
    • If an A/C service station without a flushing program is used, the procedure must be performed manually (evacuate, flush three times with at least 4 kg refrigerant each and extract refrigerant again, evacuate).
  2. A/C Service Station Refrigerant Hose
    • From high pressure side of A/C service station (mostly colored red) to low pressure side connection of A/C compressor on refrigerant circuit (larger diameter).
  3. Adapter for Connecting Low Pressure Side to Refrigerant Circuit
  4. Low Pressure Side Connection on Refrigerant Circuit
  5. Adapter for the Removed Expansion Valve
  6. Evaporator
  7. Connection to Receiver/Dryer
    • There are different versions depending on vehicle. Refer to ADAPTER FOR ASSEMBLING FLUSHING CIRCUIT .
    • Neither installed on vehicles with dryer cartridge in receiver/dryer at condenser nor with receiver/dryer installed in condenser. Refer to REFRIGERANT CIRCUIT (vehicle-specific repair information).
  8. Adapter for Bridging the Removed Receiver/Dryer
  9. Refrigerant Charge Hose
  10. Condenser
    • If a receiver/dryer with dryer cartridge is installed at the condenser, the dryer cartridge must be removed (reseal receiver/dryer at or in condenser). Refer to REFRIGERANT CIRCUIT or (vehicle-specific repair information).
    • If the receiver/dryer is directly installed at the condenser, the receiver/dryer must be removed and replaced only after flushing. Refer to REFRIGERANT CIRCUIT (vehicle-specific repair information).
      NOTE:

      On certain vehicles the receiver/dryer is integrated inside the condenser and the dryer cartridge cannot be replaced separately and is not available as a single part. Replace the condenser with the receiver/dryer or dryer cartridge after flushing on these vehicles. Refer to REFRIGERANT CIRCUIT .

  11. High Pressure Side Connection on Refrigerant Circuit
  12. Adapter to Connection for High Pressure Side on Refrigerant Circuit
  13. Charge Hose for Refrigerant Circuit Flushing Device
    • From connection to the high pressure side of the A/C compressor on the refrigerant circuit (smaller diameter) to input of refrigerant circuit flushing device.
  14. Flushing Equipment for Refrigerant Circuits
    • There are different versions of the Refrigerant Circuit Flushing Device. (Refer to Tools; Special Tools and Equipment: A/C and Heating).
    • With filter, viewing glass, safety valve, heating, refrigerant container etc. (depending on version).
    • Depending on the construction of the A/C service station and of refrigerant circuit flushing device, a check-valve may be installed at output of refrigerant circuit flushing device (to guarantee correct direction of refrigerant flow during flushing).
  15. A/C Service Station Refrigerant Hose
    • From the low pressure side of the service station (mostly blue) to the output of the flushing device for refrigerant circuits.
  16. Adapter to Seal Output to Second Evaporator
    • Only necessary on certain vehicles with optional equipment "second evaporator"
    • From the Refrigerant Circuits Adapter Set 1 VAS6338/1
  17. Adapter to Seal Output to Second Evaporator
    • Only necessary on certain vehicles with optional equipment "second evaporator"
    • From the Refrigerant Circuits Adapter Set 1 VAS6338/1
  18. Low Pressure Side Connection on Refrigerant Circuit to Second Evaporator
  19. Connection of High Pressure Side on Refrigerant Circuit to Second Evaporator
  20. Adapter for the Removed Expansion Valve on Second Evaporator
    • There are different versions depending on the vehicle. Refer to ADAPTER FOR ASSEMBLING FLUSHING CIRCUIT .
    • Only necessary on certain vehicles with optional equipment "second evaporator"
    • From the Refrigerant Circuits Adapter Set 1 VAS6338/1
  21. Second Evaporator
    • Only present on certain vehicles with optional equipment "second evaporator"
scientia non olet · About LEMON Manuals