A8L Quattro Sedan V8-4.2L (AUX) (2001)
Accumulator HVAC: Description and Operation
A/C Refrigerant System, Component Overview
Accumulator
The accumulator traps the mixture of refrigerant vapor and gas coming from the evaporator. While in the accumulator, the refrigerant vapor turns to gas
and, along with the refrigerant oil, is then suctioned by the compressor.
An oil extraction passage is incorporated into the accumulator to ensure that refrigerant oil flowing with the refrigerant does not remain in the
accumulator.
Any moisture in the system is absorbed by the desiccant in the accumulator.
NOTE:
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Do not remove caps -A- and -B- until ready to install new accumulator
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If caps are removed too soon, the desiccant becomes saturated with moisture after a very short time. If this occurs, the accumulator must be
replaced.