Audi A2 2001 - Page 67

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2.1.9 Flushing Circuit Block Diagrams
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 flush‐
ing, 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 ⇒ page 63 and a refrigerant circuit with
expansion valve, fluid reservoir and a second evaporator (op‐
tional equipment on certain vehicles), refer to ⇒ page 65 .
♦ 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).
Refrigerant Circuit with Restrictor and Reservoir
Note
On vehicles with restrictor and reservoir, the restrictor and reser‐
voir are removed, the lines disconnected for removing the restric‐
tor are reconnected again. The connections to the reservoir
removed are connected by means of two adapters and the Fill
hose -VAS 6338/31- (from the Adapter case for VW/Audi pas‐
senger cars -VAS 6338/1- ).
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
2. Description and Operation 63