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f) Make sure that cylinder is situated on the
scales before recovery takes place.
g) Start the recovery machine and operate in
accordance with instructions.
h) Do not overll 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 lled 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 refrigerating system unless it has
been cleaned and checked.
9. Labeling
Equipment shall be labeled 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 ammable
refrigerant.
10. Recovery
When removing refrigerant from a system,
either for servicing or decommissioning, it
is recommended good practice that all
refrigerants are removed safely.
When transferring refrigerant into cylinders,
ensure that only appropriate 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
labeled for that refrigerant (i.e. special cylinders
for the recovery of refrigerant). Cylinders shall
be complete with pressure relief valve and
associated shut-off valves in good working order.
Empty recovery cylinders are evacuated and, if
possible, cooled before recovery occurs.
The recovery equipment 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 ammable 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 properly
maintained and that any associated electrical
components are sealed to prevent ignition
in the event of a refrigerant release. Consult
manufacturer if in doubt.
The recovered refrigerant shall be returned to
the refrigerant supplier in the correct recovery
cylinder, and the relevant Waste Transfer Note
arranged. Do not mix refrigerants in recovery
units and especially not in cylinders.
If compressors or compressor oils are to
be removed, ensure that they have been
evacuated to an acceptable level to make
certain that ammable refrigerant does not
remain within the lubricant. The evacuation
process shall be carried out prior to returning the
compressor to the suppliers. Only electric heating
to the compressor body shall be employed to
accelerate this process. When oil is drained from
a system, it shall be carried out safely.
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