ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – valve unit of heat pump
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
3.25
Removing and installing heat condens‐
er, R744
3.25.1
Removing and installing heat condens‐
er
– Heat condenser -11- is currently not available separately
⇒ Electronic parts catalogue (ETKA).
3.26
Removing and installing refrigerant
shut-off valve for heater and air condi‐
tioner unit [N541]
3.26.1
Removing and installing refrigerant
shut-off valve for heater and air condi‐
tioner unit [N541], left-hand drive vehi‐
cles
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-.
– 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.
– ⇒ Air conditioning systems with refrigerant R1234yf – Gener‐
al notes; Rep. gr. 87; Working with air conditioner service
station; Draining air conditioner service station.
– Disconnect electrical connector -4-.
50
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.
– Loosen union nuts -2-. When doing this, counterhold on
refrigerant shut-off valve for heater and air conditioner unit
-N541--3-.
– Detach refrigerant shut-off valve for heater and air condition‐
er unit -N541--3-.
Installing
Install in reverse order of removal, observing the following:
– Make sure that refrigerant lines -1- are routed free of stress.
3. Refrigerant circuit
51
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– When tightening union nuts, make sure that refrigerant lines
-1- remain free of stress.
– Screw on union nuts -2- to stop by hand.
– Tighten union nuts -2-. When doing this, counterhold on
refrigerant shut-off valve for heater and air conditioner unit
-N541--3-.
– Connect electrical connector -4-.
– ⇒ 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 – air intake unit of heater
and air conditioning unit
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
3.26.2
Removing and installing refrigerant
shut-off valve for heater and air condi‐
tioner unit [N541], right-hand drive ve‐
hicles
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 refrigerant line leading from condenser to expan‐
sion valve ⇒ Rep. gr. 87; Removing and installing refrigerant
line from condenser to expansion valve.
– Mark installation position between refrigerant shut-off valve
for heater and air conditioning unit -N541--3- and refrigerant
line -1- before loosening union nuts.
52
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Loosen union nuts -2- while counterholding at shut-off valve
-3-.
– Detach shut-off valve -3-.
Installing
Install in reverse order of removal, observing the following:
Important
•
Before installing the refrigerant line in the vehicle, the re‐
frigerant shut-off valve for heater and air conditioning unit
-N541--4- must be secured to the refrigerant line -2-.
– Screw refrigerant line -2- with union nut -3- by hand and as
far as stop onto shut-off valve -4- while observing marking of
installation position.
– Tighten union nut -3- while counterholding at shut-off valve
-4-.
– Install refrigerant line -2- with shut-off valve -4-, and make
sure it is routed free of stress ⇒ Rep. gr. 87; Removing and
installing refrigerant line from condenser to expansion valve.
3. Refrigerant circuit
53
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
2024 VW ID.4 Owner's Manual
