Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 549

2

Refrigerant Circuit

⇒ “2.1 System Overview - Refrigerant Circuit”, page 32
⇒ “2.2 Overview - Condenser”, page 35
⇒ “2.3  Refrigerant Circuit Pressure Sensor G805 , Removing and

Installing”, page 36
⇒ “2.4 Expansion Valve, Removing and Installing”, page 37
⇒ “2.5 Condenser, Removing and Installing”, page 40
⇒ “2.6 Dryer Bag, Removing and Installing”, page 42
⇒ “2.7 Refrigerant Lines with Inner Heat Exchanger, Removing

and Installing”, page 52
⇒ “2.8 Low Pressure Side Refrigerant Line Balance Weight, Re‐

moving and Installing”, page 54
⇒ “2.9 Evacuating and Charging Valve, Removing and Installing,

Low and High Pressure Side”, page 55

2.1

System Overview - Refrigerant Circuit

– When working on the refrigerant circuit, note the information.

Refer to

⇒ “4.1 Refrigerant Circuit, Specialized Repairs”, page 6

 .

1 - Refrigerant Line - Low Pres‐

sure Side

❑ To the refrigerant line

with the inner heat ex‐

changer

❑ An additional balance

weight may be present

on this refrigerant line

depending on the refrig‐

erant line version and

the production period.

Refer to the Parts Cata‐

log.

❑ Balance weight remov‐

ing and installing. Refer

to

⇒ “2.8 Low Pressure

Side Refrigerant Line

Balance Weight, Re‐

moving and Installing”,

page 54

 .

2 - Refrigerant Line - High

Pressure Side

❑ To the refrigerant line

with the inner heat ex‐

changer

3 - Refrigerant Line with Inner

Heat Exchanger

❑ In the inner heat ex‐

changer, the flowing flu‐

id warm refrigerant on

the high pressure side is

delivered into the low

pressure side as flow‐

ing, vapor, cold refriger‐

ant to increase the effi‐

ciency of the Air Condi‐

tioning (A/C) system

❑ From the condenser and A/C compressor
❑ Removing and installing. Refer to

⇒ “2.7 Refrigerant Lines with Inner Heat Exchanger, Removing and Installing”, page 52

 .

4 - Expansion Valve

❑ Function and removal and installation. Refer to

⇒ “2.4 Expansion Valve, Removing and Installing”, page 37

5 - A/C Compressor

❑ Overview. Refer to 

⇒ “3.1 Overview - A/C Compressor Power Unit”, page 57

 .

❑ Removing and installing. Refer to 

⇒ “3.4 A/C Compressor, Removing and Installing”, page 63

 .

❑ Removing from and attaching to the bracket. Refer to

⇒ “3.3 A/C Compressor, Removing and Installing on Bracket”, page 61

 .

6 - Receiver/Dryer with Dryer Bag

Note

Under certain conditions, the receiv‐

er/dryer and the dryer bag does not

need to be replaced each time the

refrigerant circuit is opened. Refer to

⇒  Refrigerant R134a Servicing;

Rep. Gr.  00 ; A/C System, General

Information .

❑ Denso condenser. Refer to

⇒ “2.6.1 Dryer Bag, Removing and Installing, Denso Condenser”, page 42

 .

❑ Modine condenser. Refer to

⇒ “2.6.2 Dryer Bag, Removing and Installing, Modine Condenser”, page 44

 .

7 - Condenser

❑ Overview. Refer to 

⇒ “2.2 Overview - Condenser”, page 35

 .

❑ Removing and installing. Refer to 

⇒ “2.5 Condenser, Removing and Installing”, page 40

 .

❑ There are different versions. Refer to the Parts Catalog.

8 - Refrigerant Line

❑ To the condenser

9 - Nut

❑ 8 Nm

10 - Bolt

❑ 8 Nm

11 - Bolt

❑ 10 Nm

12 - Bolt

❑ 22 Nm

13 - Relief Valve on A/C Compressor

❑ Checking. Refer to 

⇒ “3.5 Pressure Relieve Valve on A/C Compressor, Checking”, page 67

 .

14 - Connector with A/C Compressor Regulator Valve - N280-
15 - Oil Drain Plug

❑ Tightening specification:

♦ Denso A/C compressor - 30 Nm
♦ Sanden A/C compressor - 10 Nm

Caution

For  faulty  oil  drain  plug

seal  on  the  A/C  com‐

pressor.

♦

Only remove when the

refrigerant circuit is emp‐

ty. The connection does

not have a valve. Refer to

⇒  Refrigerant R134a

Servicing; Rep. Gr.  00 ;

A/C System, General In‐

formation .

❑ There are different versions. Refer to the Parts Catalog.

16 - Cap

❑ Modine: 5 Nm
❑ There are different versions. Refer to the Parts Catalog.

17 - Bolt

❑ 8 Nm

18 - High Pressure Side Service Connection

❑ Cap: 0.4 ± 0.1 Nm
❑ Valve: 2 ± 0.2 Nm
❑ Removing and installing. Refer to

⇒ “2.9 Evacuating and Charging Valve, Removing and Installing, Low and High Pressure Side”,

page 55

 .

19 - Refrigerant Circuit Pressure Sensor - G805-

❑ 5 ± 1 Nm
❑ Removing and installing. Refer to

⇒ “2.3  Refrigerant Circuit Pressure Sensor G805 , Removing and Installing”, page 36

 .

20 - Low Pressure Side Service Connection

❑ Cap: 0.4 ± 0.1 Nm
❑ Valve: 2 ± 0.2 Nm
❑ Removing and installing. Refer to

⇒ “2.9 Evacuating and Charging Valve, Removing and Installing, Low and High Pressure Side”,

page 55

 .

2.2

Overview - Condenser

Note

Different versions are available. Refer to the Parts Catalog. The image displayed is a Modine condenser.

1 - Condenser

❑ There are different ver‐

sions. Refer to the Parts

Catalog.

❑ Removing and instal‐

ling. Refer to

⇒ “2.5 Condenser, Re‐

moving and Installing”,

page 40

 .

2 - Seal

❑ Replacing. Refer to the

Parts Catalog for the

versions

❑ Coat with refrigerant oil

before installing

3 - Refrigerant Line

❑ To the inner heat ex‐

changer

4 - Bolt

❑ 8 Nm

5 - Bolt

❑ 8 Nm

6 - Refrigerant Line

❑ From the Air Condition‐

ing (A/C) compressor

7 - Seal

❑ Replacing. Refer to the

Parts Catalog for the

versions

❑ Coat with refrigerant oil

before installing

8 - Bracket

❑ For the refrigerant lines

9 - Cap

❑ Modine: 3 Nm
❑ There are different versions. Refer to the Parts Catalog.

10 - Snap Ring
11 - Cap

❑ There are different versions. Refer to the Parts Catalog.
❑ Replace if damaged

12 - Seal

❑ Replacing. Refer to the Parts Catalog for the versions
❑ Coat with refrigerant oil before installing