Gree GPH12AO-K5NNA1A Owner's Manual page 28

Specialist's Manual
that only appropriate refrigerant recovery cylinders are
employed. Ensure that 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 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 re-
covery machine, check that it is in satisfactory working
order, has been properly maintained and that any ass-
ociated 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 ref-
rigerant 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 accepta-
ble level to make certain that flammable refrigerant
does not remain within the lubricant. The evacuation
process shall be carried out prior to returning the com-
pressor 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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