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 - 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
⇒ “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
⇒ “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
⇒ “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”,
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”,
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 - 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
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