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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 asso-
ciated electrical components are sealed to prevent ignition in the event of a
refrigerant release.
Consult manufacturer if in doubt. The recovered refrigerant shall be re-
turned 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 le-
vel to make certain that flammable 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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