Air-conditioners / User’s Manual
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87
EN
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.
The 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 all appropriate refrigerants
including, when applicable,
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.
The recovered refrigerant shall be returned to
the refrigerant 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 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. 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.
2
Maintenance instruction
