System Overview - Refrigerant Circuit With Expansion Valve And Receiver/Dryer

• The following illustration shows a refrigerant circuit with two evaporators and an internal heat exchanger as an example.
• The layout of the refrigerant circuit may show differences which are vehicle-specific. Refer to Refrigerant Circuit (vehicle-specific service information).

The arrows indicate the refrigerant flow direction.

HD = high pressure side

ND = low pressure side

Fig 1: Exploded View Of Refrigerant Circuit

Courtesy of AUDI OF AMERICA, LLC

1. A/C Compressor Regulator Valve -N280-
   • Only for mechanical A/C compressor
2. A/C Compressor
3. Belt Pulley
   • Depending on vehicle equipment with A/C Clutch -N25-
4. Pressure Relief Valve
5. Refrigerant Pressure Sensor
   • Vehicle-specific versions
6. Condenser
   • As an example, with receiver/dryer
7. Receiver/Dryer
   • Installed to the condenser or installed into the condenser
   • with dryer cartridge
8. Service Connection - High Pressure Side
   • with closure cap
   • with Evacuating and Charging Valve
9. Refrigerant line with inner heat exchanger
10. Front Expansion Valve
11. Front Evaporator
12. Service Connection - Low Pressure Side
    • with closure cap
    • with Evacuating and Charging Valve
13. Rear Expansion Valve
    • Installed depending on vehicle equipment
14. Rear Evaporator
    • Installed depending on vehicle equipment