volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Butterfly (throttle) > < Evaporator
Collection tank
Collection tank
   
To ensure that the air conditioning compressor only sucks refrigerant gas in its gaseous state, the collection tank absorbs the vapor-gas mixture coming from the evaporator. From the vapor, refrigerant gas in its gaseous state is obtained.
The refrigerant gas oil in the loop does not remain in the collection tank, as there is a vent for oil suction.
Humidity that may have seeped into the refrigerant gas circuit during assembly is absorbed by the tank filter.
Both refrigerant gas in its gaseous state and oil are sucked by the compressor.
  Note
t  The collection tank should be replaced if the refrigerant gas loop has remained open for an extended period of time (longer than normal repair time) and/or humidity has entered the system; or if this is advised by specific recommendations → Chapter.
t  Closing plugs -A- and -B- should only be removed immediately before assembly.
t  When the collection tank is not closed, the internal element rapidly becomes saturated due to humidity absorption, and is thus rendered useless.
t  During assembly, pay attention to the arrow indicating the refrigerant gas flow direction.
  V87-1403

Butterfly (throttle) > < Evaporator