Volkswagen Amarok 2011 Workshop Manual page 72

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Air conditioning system with refrigerant R134a - Edition 10.2014
– Always blow through components opposite the direction of re‐
frigerant flow.
Compressed air and nitrogen cannot be blown through the re‐
strictor, expansion valve, air conditioner compressor, receiver or
reservoir.
– In cases where condensers have a drying agent cartridge in
the integrated receiver, this drying agent cartridge must be re‐
moved.
– First blow out soiling using compressed air and then dry com‐
ponents with nitrogen.
– Fit adapter for connection of pressure hose to refrigerant cir‐
cuit ⇒ page 86 and ⇒ Heating, air conditioning .
To prevent oil and moisture from the compressed air system
making its way into the refrigerant circuit, the following points must
be observed.
♦ The compressed air must be fed through a compressed air
cleaning unit to clean and dry it. Therefore, use compressed
air filter and dryer (included in items supplied with tools for
painting work) ⇒ Workshop equipment and Special tools cata‐
logue .
♦ If refrigerant pipes have threads or union nuts at connections,
use adapter - V.A.G 1785/1- to adapter - V.A.G 1785/8- to
connect to 5/8" - 18 UNF charging hose. These adapters can
be found in the adapter case for VW/Audi passenger vehicle
set - VAS 6338/1- and adapter case for commercial vehicle
set - VAS 6338/50- .
♦ On refrigerant pipes without thread or union nut on the con‐
nection, use adapter from adapter case for VW/Audi passen‐
ger vehicle set - VAS 6338/1- or adapter case for commercial
vehicle set - VAS 6338/50- or proprietary air gun with rubber
nozzle.
Note
Always extract any escaping air and/or nitrogen from the com‐
♦
ponents using appropriate local exhaust ventilation LEV (e.g.
workshop extraction system).
Certain contaminants and old refrigerant oil cannot be shifted
♦
from the refrigerant circuit at all with compressed air or if the
compressed air is insufficient. These contaminants can only
be removed by purging with refrigerant R134a
66
Rep. gr.00 - Technical data
⇒ page 67 .