ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
♦ ⇒ General body repairs, exterior; Rep. gr. 66; Underbody
cladding; Assembly overview – underbody cladding
3.30
Disconnecting/connecting refrigerant
lines from/to condenser/gas cooler,
R744
3.30.1
Disconnecting and connecting refriger‐
ant lines on gas cooler
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
Disconnecting
Immediately seal any open lines and connections with clean
plugs from engine bung set -VAS 6122-.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Draining refrigerant circuit.
– Remove lock carrier ⇒ General body repairs, exterior; Rep.
gr. 50; Lock carrier; Removing and installing lock carrier.
– Remove front underbody cladding ⇒ General body repairs,
exterior; Rep. gr. 66; Underbody cladding; Removing and
installing front underbody cladding.
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 -1-.
– Pull off refrigerant line -2-.
74
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Unscrew bolt -1-.
– Pull off refrigerant line -2-.
Connecting
Install in reverse order of removal, observing the following:
– Install seals and captive fasteners free of oil.
– Carry out function “Open electrically actuated valves to
drain, evacuate or charge refrigerant circuit” using ⇒ Vehicle
diagnostic tester ⇒ Rep. gr. 00; Access to diagnoses.
– ⇒ Air conditioning systems with refrigerant R744 – General
notes; Rep. gr. 87; Working with air conditioner service sta‐
tion; Charging refrigerant circuit.
Tightening torques
♦ ⇒ Rep. gr. 87; Assembly overview – refrigerant lines
♦ ⇒ General body repairs, exterior; Rep. gr. 50; Lock carrier;
Removing and installing lock carrier
♦ ⇒ General body repairs, exterior; Rep. gr. 66; Underbody
cladding; Assembly overview – underbody cladding
3.31
Cleaning refrigerant circuit, refriger‐
ant R744
3.31.1
Cleaning refrigerant circuit
Special tools and workshop equipment required
♦ Air conditioner service station
♦ air conditioner service station
♦ engine bung set -VAS 6122-
♦ flushing adapter -VAS 6338/77-
♦ flushing device
♦ The refrigerant circuit is flushed using refrigerant R1234yf
or R134a and the air conditioner service station which is
designed for this purpose.
♦ The following procedure is described for an air conditioner
service station with integrated flushing device for R1234yf
as an example. The procedure for an air conditioner service
station with integrated flushing device for R134a is similar.
♦ If the refrigerant circuit is contaminated, it is flushed in the
same direction as the normal direction of flow.
3. Refrigerant circuit
75
2024 VW ID.4 Owner's Manual
