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AIR CONDITIONING
36
11.14 FLUSHING THE A/C SYSTEM FOR
CONTAMINATION OF LUBRICATING OIL
REMOVAL
Some oil is lost whenever air conditioning system
components are replaced. Where the system has
been ruptured, contaminated, or a compressor has
to be removed and reinstalled or replaced, the
system should be checked for contamination and,
if so, the entire system must be flushed. Currently
the only method recommended when flushing is
with refrigerant R134a.
CAUTION:
A Refrigerant Recovery Unit (RRU) should be used
to capture the R134a used for flushing. The
R134a, must be reclaimed via the RRU into a
separate bottle. Use only a dedicated R134a RRU.
IMPORTANT:
The complete air conditioning system must
contain 120 ± 10 cc of factory installed refrigerant
oil.
NOTE:
A new compressor will contain 120cc of factory
installed lubricating oil.
1. Flush individual components.
2. Self-made flushing will be required as A/C
system component fittings all differ in size,
shape and thread size.
3. Invert decanting cylinder to use refrigerant in
liquid form.
4. Reverse flush components.
5. Do not flush through a compressor
otherwise possible internal damage could
occur.
6. Recover / recycle flushing refrigerant, the
recovery device will remove contaminants
through a filtration system.