1.1.20 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
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. T
he
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. T
he
recovered
refrigerant
shall
be
returned
to
the
refrigerant
supplier
in
the correct
recovery
cylinder,
and
the
relevant
Waste
tr
ransfer
n
ote
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. T
he
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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