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6
● Before carrying out this procedure, it is essential that the technician is completely
familiar with the equipment and all its detail. It is recommended that all refrigerants are
recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall
be taken in case analysis is required prior to reuse of reclaimed refrigerant. Before
doing this task, take an oil and refrigerant sample, so it can be analyzed before reuse of
reclaimed refrigerant. It is essential that electrical power is available before the task is
commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure that:
- Mechanical handling equipment is available, if required, for handling refrigerant
cylinders.
- All personal protective equipment is available and is being used correctly.
- The recovery process is supervised at all times by a competent person.
- Recovery equipment and cylinders conform to the appropriate standards.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold, so the refrigerant can be removed from
various parts of the system.
f) Make sure the cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with the manufacturer's
instructions.
h) Do not overfill cylinders (no more than 80 % of volume liquid ).
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been filled correctly and the process completed, make sure the
cylinders and the equipment are removed from site promptly and all isolation valves on
the equipment are closed off.
k) Recovered refrigerants shall not be charged into another refrigeration system, unless it
has been cleaned and checked.
● Label all equipment, stating that it has been decommissioned and emptied of refrigerant
– ensure it is dated and signed. There must also be a label stating it contains a
flammable refrigerant.
● When removing refrigerants from a system, either for servicing or decommissioning,
ensure it is done safely. When transferring the refrigerant into cylinders, ensure that
only appropriate refrigerant recovery cylinders are employed. Ensure the correct
number of 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. Remove empty cylinders and, if
possible, wait for them to cool before recovery. The recovery equipment shall be in
good working condition with a set of instructions concerning the equipment - it must be
suitable for the recovery of flammable refrigerants. In addition, a set of calibrated
weighing scales shall be available and in good working condition. Hoses shall be
complete with leak-free disconnect couplings and in good condition. Before using the
recovery machine, ensure it is properly working, 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 must be
returned to the 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 need removing, ensure they have been
evacuated to an acceptable level, so flammable refrigerants do 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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