NewAir NAC12KWHD3 Owner's Manual page 30

11. RECOVERY
• When removing refrigerant from a system, either for servicing or
decommissioning, it is recommended 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 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 should be in good working order with a set of
instructions concerning the equipment at hand and should be suitable for
the recovery of flammable refrigerants. In addition, a set of calibrated
weighing scales should 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, this process should be carried
out safely.
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