ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Connect electrical connector -1-.
– Install refrigerant line -6- between shut-off valve -4- and ex‐
pansion valve while observing following sequence:
♦ Secure refrigerant line -6- to expansion valve ⇒ Rep. gr. 87;
Detaching/attaching refrigerant line from/to expansion valve.
♦ Tighten union nut -5- while counterholding at shut-off valve
-4-.
♦ When tightening union nut -5-, make sure that refrigerant
lines -2- and -6- remain free of stress.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
3.27
Removing and installing refrigerant
line, R1234yf
3.27.1
Removing and installing refrigerant line
from condenser to expansion valve
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining refrigerant circuit.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
– Remove front underbody cladding ⇒ General body repairs,
exterior; Rep. gr. 66; Underbody cladding; Removing and
installing front underbody cladding.
– Detach coolant expansion tank, and lay it slightly aside
⇒ Rep. gr. 19; Cooling system/coolant; Removing and instal‐
ling coolant expansion tank.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolt -2-.
54
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Pull off refrigerant line -1-.
– Disconnect electrical connector -2-.
– Unhook refrigerant line -1- from bracket -3-.
– Disconnect electrical connector -3-.
– Unscrew bolts -2-.
– Pull off refrigerant line -1-.
– Unscrew bolt -2-.
3. Refrigerant circuit
55
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Pull off refrigerant lines -3- from expansion valve.
– Remove refrigerant lines -1-.
Installing
Install in reverse order of removal, observing the following:
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ Rep. gr. 87; Assembly overview – condenser
♦ ⇒ General body repairs, exterior; Rep. gr. 66; Underbody
cladding; Assembly overview – underbody cladding
3.27.2
Removing and installing refrigerant line
from air conditioner compressor VX81
to expansion valve
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Seal off open pipes/lines and connections immediately with
clean plugs from engine bung set -VAS 6122-.
– ⇒ Air conditioners with refrigerant R1234yf - General infor‐
mation; Rep. gr. 87; Working with the air conditioner service
station; Discharging refrigerant circuit.
– Remove air intake box of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake box of
heater and air conditioning unit.
56
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Unfasten coolant expansion tank and move slightly to side
⇒ Rep. gr. 19; Cooling system/coolant; Removing and instal‐
ling coolant expansion tank.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolt -3- securing refrigerant line from air conditioner
compressor to expansion valve.
– Remove bolts -3-.
– Detach refrigerant line -2-.
– Unplug electrical connector -5-.
– Release refrigerant line -1- from retainer -4-.
– Remove bolt -2-.
3. Refrigerant circuit
57
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Detach refrigerant line -1-.
– Remove refrigerant line -1-.
Installing
Installation is carried out in reverse order; note the following:
– ⇒ Air conditioners with refrigerant R1234yf - General infor‐
mation; Rep. gr. 87; Working with the air conditioner service
station; Charging refrigerant circuit
Tightening torques
♦ ⇒ Rep. gr. 87; Exploded view - refrigerant lines
3.27.3
Removing and installing refrigerant line
from condenser to air conditioner com‐
pressor [VX81]
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Drain refrigerant circuit ⇒ Air conditioning systems with re‐
frigerant R1234yf – general notes; Rep. gr. 87; Working with
air conditioner service station; Draining refrigerant circuit.
– Remove lock carrier ⇒ General body repairs, exterior; Rep.
gr. 50; Lock carrier; Removing and installing lock carrier.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
58
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2- and -3-.
– Pull off and remove refrigerant line -1-.
Installing
Install in reverse order of removal, observing the following:
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – condenser
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ General body repairs, exterior; Rep. gr. 50; Lock carrier;
Assembly overview – lock carrier
3.27.4
Removing and installing refrigerant line
from heat exchanger for high-voltage
battery to high-pressure line
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining refrigerant circuit.
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
3. Refrigerant circuit
59
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -2-.
– Pull off and remove refrigerant line -1-.
Installing
Install in reverse order of removal, observing the following:
– Make sure that refrigerant lines are properly seated, and
tighten them.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
3.27.5
Removing and installing refrigerant line
from heat exchanger for high-voltage
battery to low-pressure line
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Removing
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining refrigerant circuit.
60
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Remove air intake unit of heater and air conditioning unit
⇒ Rep. gr. 87; Removing and installing air intake unit of
heater and air conditioning unit.
CAUTION
Risk of frostbite from escaping pressurised refrigerant
Risk of frostbite on skin and other parts of the body
– Put on protective gloves.
– Put on safety goggles.
– Extract/drain refrigerant and then immediately open up re‐
frigerant circuit.
– Extract/drain refrigerant again if more than 10 minutes
have passed since initial extraction and refrigerant circuit
has not been opened up. Renewed evaporation has cre‐
ated pressure in the refrigerant circuit.
– Unscrew bolts -3-.
– Pull off and remove refrigerant line -2-.
Installing
Install in reverse order of removal, observing the following:
– Make sure that refrigerant lines are properly seated, and
tighten them.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ Rep. gr. 87; Assembly overview – air intake unit of heater
and air conditioning unit
3.28
Removing and installing refrigerant
line, R744
3.28.1
Removing and installing refrigerant line
between air conditioner compressor
VX81 and dryer
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
3. Refrigerant circuit
61
2024 VW ID.4 Owner's Manual
