21
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 labelled 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 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
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
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