Get Air conditioning and thermal management -> Refrigerant circuit Guide for Audi RS E Tron Gt 4 Door First Generation (2021-2026)

Refrigerant circuit

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Key:

Heating circuit

Refrigerant circuit

Coolant circuit for powertrain

Coolant circuit for high-voltage battery

The refrigerant circuit is split into two branches. The first branch is used for climate control in the vehicle interior and the task of

the second is to cool high-voltage battery 1 AX2 if necessary.

The refrigerant circuits consist of the following components:

Electrical air conditioner compressor V470, refrigerant pressure and temperature sender G395, heat condenser B, refrigerant

shut-off valve 3 N641, condenser 1, non-return valve 2, dryer 3, inner heat exchanger 4, refrigerant expansion valve 3 N638, evap-

orator 5, refrigerant pressure and temperature sender 3 G827, refrigerant pressure and temperature sender 2 G826, refrigerant

expansion valve 2 N637, heat exchanger for high-voltage battery (chiller) A and refrigerant shut-off valve 2 N640 with refrigerant

shut-off valve 5 N643.

The refrigerant shut-off valves N640, N641 and N643 are not fitted on vehicles without the heat pump function.

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Refrigerant circuit for climate control in vehicle interior

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In the refrigerant circuit for climate control in the vehicle interior, electrical air conditioner compressor V470 transports the com-

pressed gaseous refrigerant through heat condenser B and refrigerant shut-off valve 3 N641 to the condenser 1. The gaseous re-

frigerant is cooled and liquefied in the condenser. The liquid refrigerant flows through the non-return valve in the refrigerant circuit

2, the dryer 3 and the internal heat exchanger 4 to refrigerant expansion valve 3 N638. The refrigerant is atomised and vaporised

by refrigerant expansion valve 3. In this process, heat and moisture is removed from the air passing through the evaporator 5 on

the way to the vehicle interior. The gaseous refrigerant flows through the internal heat exchanger 4 back to electrical air condition-

er compressor V470.

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Refrigerant circuit for cooling high-voltage battery 1 AX2

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The refrigerant circuit for cooling high-voltage battery 1 AX2 branches off downstream of the internal heat exchanger 4 towards

refrigerant expansion valve 2 N637 and heat exchanger for high-voltage battery A. As it vaporises, the refrigerant absorbs the heat

from the coolant circuit for the high-voltage battery in the heat exchanger for high-voltage battery. From there, the refrigerant

flows on and back into the refrigerant circuit for climate control in vehicle interior before the internal heat exchanger.

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Air conditioning and thermal management -> Refrigerant circuit for Your Audi RS E Tron Gt 4 Door First Generation (2021-2026)