LG ZPNQ48GTLA0 Owner's Manual page 19

j) When the cylinders have been filled correctly and the process complete, make sure that the
cylinders and the equipment are removed from site promptly and all isolation valves on the
equipment are closed off.
k) Recovered refrigerant shall not be charged into another refrigeration system unless it has
been cleaned and checked.
Refrigerant Recovery
When removing refrigerant from a system, either for servicing or decommissioning, it is recom-
mended good practice that all refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure 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 la-
belled 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 flammable refrigerants. In addi-
tion, 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 maintained and
that any associated electrical components are sealed to prevent ignition in the event of a refriger-
ant 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 lubri-
cant. The evacuation process shall be carried out prior to returning the compressor to the suppli-
ers. 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.
MAINTENANCE AND SERVICE
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