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Inverter Window Air Conditioner
12
taken in case analysis is required prior to re-use of reclaimed refrigerant. It
is essential that electrical power is available before the task is commenced.
a)Become familiar with the equipment and its operation. b) Isolate system
electrically. c) Before attempting the procedure ensure that: Mechanical
handling equipment is available, if required, for handling refrigerant cylin-
ders;All personal protective equipment is available and being used correct-
ly; The recovery process is supervised at all times by a competent person;
Recovery equipment and cylinders conform to the appropriate standards.
d) Pump down refrigerant system, if possible. e) If a vacuum is not possible,
make a manifold so that refrigerant can be removed from various parts of
the system. f) Make sure that cylinder is situated on the scales before
recovery takes place. g) Start the recovery machine and operate in accor-
dance with manufacturer's instructions. h) Do not overfill cylinders. (No more
than 80 % volume liquid charge). i) Do not exceed the maximum working
pressure of the cylinder, even temporarily. j) When the cylinders have been
filled correctly and the process completed, make sure that the cylinders
and the equipment are removed from site promptly and all isolation valves
on the equipment are closed off. k) Recovered refrigerant shall not be
charged into another refrigeration system unless it has been cleaned and
checked.
14.Labelling
Equipment shall be labelled stating that it has been de-commissioned and
emptied of refrigerant. The label shall be dated and signed. Ensure that
there are labels on the equipment stating the equipment contains
flammable refrigerant.
15.Recovery
When removing refrigerant from a system, either for servicing or decommis-
sioning, it is recommended good practice that all refrigerants are removed
safely. When transferring refrigerant into cylinders, ensure that only appro-
priate refrigerant recovery cylinders are employed. Ensure that the correct
number of cylinders for holding the total system charge is available. All
cylinders to be used are designated for the recovered refrigerant and
labelled for that refrigerant (i.e. special cylinders for the recovery of refriger-
ant). Cylinders shall be complete with pressure relief valve and associated
shut-off valves in good working order. Empty recovery cylinders are evacu-
ated and, if possible, cooled before recovery occurs. The recovery equip-
ment shall be in good working order with a set of instructions concerning
the equipment that is at hand and shall be suitable for the recovery of
flammable refrigerants. In addition, a set of calibrated weighing scales shall
be available and in good working order. Hoses shall be complete with
leak-free disconnect couplings and in good condition. Before using the
recovery machine, check that it is in satisfactory working order, has been
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