Volkswagen Golf Service & Repair Manual: Detecting leaks
External damage can cause leaks in the refrigerant circuit. Because a small leak will involve only small quantities of refrigerant, leaks should be checked for using an electronic leak detector or by introducing a leak detection additive to the refrigerant circuit. Electronic leak detectors can detect leakage rates of less than 5 grams loss of refrigerant per year. The leak detector should be specific to the composition of the particular refrigerant in use. For example, a leak detector for R12 refrigerant is not appropriate for R134a refrigerant because R134a refrigerant has no chlorine atoms to which the lead detector responds.)
Charge factor
There must be space both for liquid and vapour in a
container. As the temperature rises, the liquid expands. The
space occupied by the vapour becomes smaller. Eventua ...
Refrigerant machine oil
Refrigerant machine oil is miscible (approx. 20%–40%
depending on the type of air conditioner compressor and the
quantity of refrigerant) in the refrigerant. I ...
Other materials:
Removing and installing poly V-belt, vehicles without air conditioner
compressor
Special tools and workshop equipment
required
Locking pin -T10060 A-
Removing
–
To slacken poly V ...
Receiver
The receiver collects the liquid droplets and directs them
in a continuous stream to the expansion valve. Moisture which
has entered the refrigerant circuit during assembly is collected
by the dessicant bag in the receiver.
Note
...
Checking exhaust ventilation for passenger compartment
Note
The stale air escapes via ventilation openings in the
luggage compartment trim.
If the ventilation is to function properly, the exhaust
openings must not be covered.
The ventilation ...
