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

Heat pump function

With residual heat from high-voltage battery 1 AX2

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The residual heat from high-voltage battery 1 AX2 can be used to heat the vehicle interior via the heat pump function.

The gaseous refrigerant heated up in heat exchanger for high-voltage battery A is drawn in and compressed in the internal heat

exchanger 4 by the electrical air conditioner compressor V470. This heats the refrigerant further. In the heat condenser B, the hot,

gaseous refrigerant passes the heat energy to the coolant in the heating circuit. In this process, the refrigerant cools and liquefies

again. It flows through the opened refrigerant shut-off valve 2 N640, the dryer 3 and the internal heat exchanger 4 to refrigerant

expansion valve 2 N637. The refrigerant is atomised and vaporised with the help of the expansion valve N637.

The closed refrigerant shut-off valve 3 N641 and the non-return valve in the refrigerant circuit 2 prevent refrigerant from entering

the condenser 1.

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With residual heat from three-phase current drives VX89 and VX90

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The residual heat from the front and rear three-phase current drives VX89 and VX90 can also be used for the heat pump function.

The coolant heats up on the way through voltage converter for 800 V, 400 V, 48 V, 12 V A48, power contactor with boost function

J1178 and front and rear three-phase current drives VX89 and VX90. The warm coolant passes through the following valves:

changeover and mixing valve for thermal management V650, changeover and mixing valve 2 for thermal management V651 and

coolant changeover valve 2 N633; it then reaches the heat exchanger for high-voltage battery A. From there, the cooled coolant

flows through changeover and mixing valve 4 for thermal management V653 and changeover and mixing valve 7 for thermal man-

agement V656 to thermal management coolant pump 4 V620.

The heat is transferred from the coolant to the refrigerant in the heat exchanger for high-voltage battery A. The refrigerant’s route

is identical to that used for the function to heat the vehicle interior via the residual heat of high-voltage battery 1 AX2.

The residual heat from the coolant circuit for the high-voltage battery and the coolant circuit for the electric powertrain may both

be used for the heat pump function.

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