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17) Labelling
18) Recovery
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The recovered refrigerant must not be loaded into another cooling
system unless it has been cleaned and checked.
The equipment must be labelled with the mention that it has been dismantled
and emptied by the refrigerant. The label must be dated and signed. Ensure
that there are labels on the equipment showing that the equipment contains
flammable refrigerant.
When performing the procedure of removing the refrigerant from a system, either
for service or for decommissioning, it is recommended that all refrigerants are
safely removed. When transferring the refrigerant to cylinders, make sure
that only the recovery cylinders are used for the refrigerant. Ensure that the
correct number of cylinders is available to take up the total quantity of the
refrigerant in the system. All cylinders to be used are intended for the recovered
refrigerant and labelled for the respective refrigerant (i.e. special cylinders for
the recovery of the refrigerant). The cylinders must be equipped with the
pressure valve and the associated shut-off valves in good working order.
Drained recovery cylinders are evacuated and, if possible, cooled before
recovery.
The recovery equipment must be in good working order, provided with a set
of available equipment instructions and be suitable for the recovery
procedure of flammable refrigerants. In addition, a set of calibrated scales
must also be available in good working order. Hoses must be equipped
with connection mechanisms without leakage and in good condition. Before
using the recovery machine, make sure it is in good working condition,
that it was properly maintained and that all associated electrical
components are sealed to prevent ignition when a coolant is released.
Consult the manufacturer if in doubt. The recovered refrigerant will be
accordingly returned to the supplier of the refrigerant in the recovery
cylinder and the note referring to the transfer of waste will be prepared. Do not
mix coolants in the recovery units and especially not in the cylinders. If the
compressors or the oils in the compressors have to be removed, make sure
they have been discharged to an acceptable level to ensure that the flammable
refrigerant does not remain in the lubricant. The evacuation process must be
carried out before returning the compressor to the suppliers. Only use electrical
heating of the compressor body to accelerate this process. When the oil is
removed from a system, this must be performed in safety conditions.
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