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

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2017 Audi S3, 2017 Audi RS 3, 2017 Audi A3 Quattro, 2017 Audi A3, and 2016 Audi S3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The arrows indicate the refrigerant flow direction.

The following illustration shows a refrigerant circuit with two evaporators and an internal heat exchanger as an example.

The layout of the refrigerant circuit is vehicle-specific. Refer to REFRIGERANT CIRCUIT (vehicle-specific repair information).

HD = High Pressure Side

ND = Low Pressure Side

Fig 1: Refrigerant Circuit With Expansion Valve And Receiver/Dryer Component Locations

Courtesy of AUDI OF AMERICA, LLC

A/C Compressor Regulator Valve -N280-
A/C Compressor
Belt Pulley
- Depending on the version a A/C Clutch -N25- is installed in the belt pulley. Refer to REFRIGERANT CIRCUIT (vehicle-specific repair information).
- Depending on the version instead of the belt pulley a drive unit can also be present. Refer to REFRIGERANT CIRCUIT (vehicle-specific repair information).
Pressure Relief Valve
Refrigerant Pressure Sensor
- Vehicle-specific version. Refer to REFRIGERANT CIRCUIT .
Condenser (with Receiver/Dryer)
Receiver/Dryer
- Installed on a condenser or in the condenser. Refer to REFRIGERANT CIRCUIT (vehicle-specific repair information).
- With dryer cartridge
Service Connection - High Pressure Side
- With closure cap
Refrigerant Line with Inner Heat Exchanger
Front Expansion Valve
Front Evaporator
- Evaporator in the front heater and A/C unit (installed under the instrument panel)
Service Connection - Low Pressure Side
- With closure cap
Rear Expansion Valve
- Only present in vehicles with a rear A/C unit (optional equipment)
Rear Evaporator
- Only present in vehicles with a rear A/C unit (optional equipment)