Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
4
Refrigerant circuit
4.1
Important repair notes on air condition‐
ing
•
•
•
•
Air conditioning systems designed for refrigerant R12 must not
be charged with refrigerant R134a until specific conversion
measures have been performed ⇒ page 45 .
The refrigerant oils specifically developed for R134a refriger‐
ant circuits must never be mixed with the refrigerant oils spe‐
cifically developed for R12 refrigerant circuits.
Air conditioner service stations that come into contact with re‐
frigerants may be used only for the refrigerant for which they
are intended.
Components for R134a refrigerant circuits are identified with
a legend or a green label, or are so designed (e.g. with different
threads), that they cannot be confused with components for
R12 refrigerant circuits.
•
•
Within the engine compartment, on the bonnet catch striker
plate or in the plenum chamber there is an information plate
which states what refrigerant is used.
Different refrigerants must never be mixed together.
Note
When working on the refrigerant circuit please refer to the infor‐
mation listed under “Safety precautions” ⇒ page 13 and “Basic
procedures for working on refrigerant circuits” ⇒ page 14 .
4.2
Retrofitting refrigerant circuit from R12
refrigerant to R134a refrigerant
lk
Chlorofluorocarbon (CFC) is no longer used as a refrigerant in the
automotive sector.
R12Converting refrigerant circuits from refrigerant R12 to refrig‐
erant R134a and repairing the converted circuits.
⇒ Repair manual for air conditioning systems with refrigerant R12
parts 2 and 3 . This workshop manual is only available as a hard
copy.
46
Rep. gr.00 - Technical data
English 
