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Before use
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Disassembly
Before carrying out this procedure, it is essential that the technician has a thorough knowledge of the
equipment and all its details. It is recommended as good practice that all refrigerants are safely reco-
vered. Before carrying out the task, a sample of oil and refrigerant should be taken in case an analysis is
required before reusing the recovered refrigerant. It is essential that electrical power is available before
starting the task.
Familiarise yourself with the equipment and its operation.
Electrically isolate the system.
Before attempting the procedure, ensure that technical equipment is available for handling refrigerant
cylinders, if necessary;
Pump out the refrigerant system, if possible.
If vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the
system.
Make sure that the cylinder is placed on the scale before recovery.
Start the recovery machine and operate it according to the instructions.
Do not overfill the cylinders (no more than 80% of the liquid charge volume).
Do not exceed the maximum working pressure of the cylinder, even temporarily.
When the cylinders have been correctly filled and the process has been completed, ensure that the
cylinders and equipment are removed from the site promptly and that all isolation valves on the equip-
ment are closed.
Recovered refrigerant should not be charged to another refrigeration system unless it has been cleaned
and checked.
Labelling
Equipment shall be labelled indicating that it has been decomposed and drained of refrigerant. The
label shall be dated and signed. In the case of equipment containing flammable refrigerants, it shall be
ensured that there are labels on the equipment indicating that the equipment contains flammable refri-
gerant.
Recovery
When refrigerant is removed from a system, either for service or for shutdown, it is recommended as
good practice that all refrigerants are disposed of safely.
When transferring refrigerant to cylinders, ensure that only suitable refrigerant recovery cylinders are
used. Ensure that the correct number of cylinders are available to maintain the total system charge. All
cylinders used are designated for the refrigerant recovered and labelled for that refrigerant (i.e. special
refrigerant recovery cylinders). Cylinders must be complete with pressure relief valve and associated
shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled
prior to recovery.
Recovery equipment must be in good working order, with a set of equipment instructions at hand, and
must be suitable for the recovery of all appropriate refrigerants, including, where appropriate, flam-
mable refrigerants. In addition, a set of calibrated scales in good working order shall be available. Hoses
shall be complete with disconnect couplings free of leaks and in good condition. Before using the reco-
very machine, check that it is in good working order, that it has been properly maintained and that all
associated electrical components are sealed to prevent ignition in the event of refrigerant discharge.
Consult the manufacturer if in doubt. Recovered refrigerant shall be returned to the refrigerant supplier
at the correct recovery site.
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