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Home >> Audi >> 2007 >> A3 Base, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> General, Technical Data - Refrigerant R134A Servicing (1 Of 2) >> General, Technical Data >> Description And Operation >> Refrigerant Circuit >> Flushing Circuit Block Diagrams >> Notes

Flushing Circuit Block Diagrams: Notes

NOTE:
  • The arrows in the following illustrations show the direction of refrigerant flow during flushing (refrigerant flows in opposite direction of flow when A/C system is in operation while flushing, therefore the high pressure side of the A/C service system is connected to the low pressure connection of the refrigerant circuit to the A/C compressor).
  • These block diagrams show a refrigerant circuit with restrictor and reservoir, refer to Refrigerant Circuit with Restrictor and Reservoir  and a refrigerant circuit with expansion valve, fluid reservoir and a second evaporator (optional equipment on certain vehicles), refer to Refrigerant Circuit With Expansion Valve, Fluid Reservoir and Second Evaporator .
  • Depending on the construction of the A/C service station, check-valves may be installed between the refrigerant circuit and the A/C service station (to guarantee correct direction of refrigerant flow during flushing).
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