volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

ABOUT US
Removing and installing condenser > < Installing

Polo Mk5

Expansion valve, function and removal
Expansion valve, function and removal
  Note
t  The refrigerant must be extracted beforehand, e.g. with air conditioner service station -VAS 6007A-.
t  The previously used air conditioner service stations can still be used ⇒ Volkswagen Workshop Equipment catalogue.
t  Only the components marked with an * can be renewed without opening and evacuating the refrigerant circuit.
t  To prevent the intrusion of moisture, all components of the refrigerant circuit which have been opened must be sealed with suitable plugs.
   
1 - Gasket between evaporator housing and plenum chamber bulkhead*
2 - O-ring
q   11.10 mm; 1.78 mm
3 - Expansion valve
q   Aperture must be sealed against splashed water.
Function
t  The expansion valve atomises incoming refrigerant and regulates the flow so that, depending on the heat transport, the vapour does not become a gas until it reaches the outlet of the evaporator.
Removing
First carry out the following work:
–  First evacuate refrigerant circuit using e.g. air conditioner service station -VAS 6007A-. Then - and only then - open refrigerant circuit.
  Note
Releasing refrigerant into the environment is a punishable offence.
  WARNING
Danger of freezing injuries.
If refrigerant circuit has not been evacuated, refrigerant will escape.
Extract refrigerant before opening refrigerant circuit. If the refrigerant circuit is not opened within 10 minutes after it has been evacuated, pressure may develop in coolant circuit due to re-evaporation. Extract refrigerant again.
–  Remove bolts -8-.
–  Pull out refrigerant line -5- and refrigerant hose -6-.
t  Renew O-rings -4- and -9-.
–  Remove bolts -7-.
–  Remove expansion valve -3-.
t  Renew O-rings -2- and -10-.
4 - O-ring
q   10.8 mm; 1.82 mm
5 - Refrigerant line
q   From receiver with dryer cartridge to expansion valve.
6 - Refrigerant hose
q   From expansion valve to air conditioner compressor.
7 - Socket head combi-bolt
q   5 Nm
8 - Bolts
q   12 Nm
q   Qty. 2
9 - O-ring
q   14.30 mm; 2.40 mm
10 - O-ring
q   17.17 mm; 1.78 mm

   

Removing and installing condenser > < Installing