ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Installing
Installation is carried out in reverse order; note the following:
– Check that threads and sealing surfaces of condenser are
not dirty or damaged.
– ⇒ 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 - condenser
3.15
Removing and installing desiccant bag/
dryer, R744
3.15.1
Removing and installing dryer
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-.
– 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 heat pump valve unit ⇒ Rep. gr. 87; Removing and
installing heat pump valve unit.
– Unscrew bolts -1- and -2-.
34
Rep. gr.87 - Air conditioning system
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
– Unscrew bolts -1-, -2- and -3-.
– Pull off refrigerant lines -1- and -2-.
– Unscrew nut -2-.
– Pull dryer -1- upwards out of bracket.
3. Refrigerant circuit
35
ID.4 2021 ➤
Heating, air conditioning system - Edition 09.2021
Installing
Install in reverse order of removal, observing the following:
After renewing dryer:
– Observe procedure for renewal of refrigerant circuit compo‐
nents ⇒ Air conditioning system with refrigerant R744 – Gen‐
eral notes; Rep. gr. 87; Refrigerant circuit; Renewing compo‐
nents.
– 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 – valve unit of heat pump
3.16
Removing and installing evacuating
and charging valves on low and high-
pressure side, R1234yf
3.16.1
Removing and installing evacuating
and charging valve (low-pressure and
high-pressure sides)
Special tools and workshop equipment required
♦ engine bung set -VAS 6122-
♦ socket -T10364/4A-
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 protective cap -3-.
36
Rep. gr.87 - Air conditioning system