Volkswagen Amarok 2011 Workshop Manual page 79

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Note
Two shut-off valves are required for purging the refrigerant
♦
circuit. A shut-off valve must be drilled open, if no shut-off tap
- VAS 6338/42- is available, for example.
Remove the solenoid -A- and the solenoid valve -B- before
♦
drilling open the shut-off valve.
Drill open the shut-off valve -C- using a suitable drill bit (e.g.
♦
5 mm in diameter).
Remove any metal shavings resulting from drilling hole -D-
♦
from shut-off valve -C-.
Reinstall the solenoid valve -B- with the respective seal -E- to
♦
the shut-off valve -C- which has been drilled open.
Purging
– Check the refrigerant volume in the air conditioning bottle.
There must be at least 7 kg of R134a refrigerant.
Note
Switch on the heater attached to the refrigerant bottle 30 minutes
before the first purging process, if necessary. In this way, pres‐
sure in the refrigerant bottle is increased and charging of the
purging circuit is accelerated.
– Drain the waste oil container of the air conditioner service sta‐
tion.
– Connect the supply hose (high-pressure side) of the air con‐
ditioner service station with an adapter
pressure line leading to the air conditioner compressor (line
with larger diameter).
– Connect the return hose (low-pressure or suction side) of the
air conditioner service station to the outlet of the purging de‐
vice for refrigerant circuits.
– Connect the inlet of the purging device for refrigerant circuits
with an adapter ⇒ page 86
to the air conditioner compressor (line with smaller diameter).
Air conditioning system with refrigerant R134a - Edition 10.2014
⇒ page 86
to the high-pressure line leading
to the low-
7. Clearing refrigerant circuit of contaminants
73