Table of Contents > 3 Refrigerant circuit > 3.15 Removing and installing desiccant bag/dryer, R744

VW ID.4 Heating & Air Conditioning System ➜ 3.15 Removing and installing desiccant bag/dryer, R744

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  

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