Flushing Circuit Block Diagrams: Notes

WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The arrows in the following illustrations show the direction of refrigerant flow while flushing. During flushing, the refrigerant flows in the opposite direction than during A/C system operation, therefore the high pressure side of the A/C Service Station is connected to the low pressure connection of the refrigerant circuit leading to the A/C compressor.

These block diagrams indicate a refrigerant circuit with restrictor and reservoir, and a refrigerant circuit with expansion valve, receiver/dryer and a second evaporator (optional equipment on certain vehicles)

Depending on the design of the A/C Service Station, check valves may be installed between the refrigerant circuit and the A/C Service Station. This guarantees the correct refrigerant flow direction during flushing.