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
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