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cylinders for holding the total system charge are
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 compressor oils are to be
removed, ensure that they have been evacuated to
an acceptable level 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.
