Page 41 mrcool.com
Maintenance
6) Do not exceed the maximum working pressure of the cylinder, even temporarily.
7) When the cylinders have been filled correctly and the process completed, ensure the cylinders and the
equipment are removed from site promptly and all isolation valves on the equipment are closed.
8) Recovered refrigerant must not be charged into another refrigeration system until it has been cleaned and
checked.
When removing refrigerant from a system, either for servicing or decommissioning, it is a 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.
Ensure that all cylinders to be used are designated for the recovered refrigerant and labelled for that
refrigerant. Cylinders should be complete with pressure relief valve and associated shut-off valves in good
working order.
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 and has been properly maintained. Consult the manufacturer if
in doubt.
The recovered refrigerant should be returned to the refrigerant supplier in the correct recovery cylinder, and
the relevant Waste Transfer Notice 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 compres-
sor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried
out safely.
Notice on Maintenance
Decommissioning (cont.)
Labelling
Recovery
After-Sales Services
Equipment shouold be labelled to state that it has been de-commissioned and emptied of refrigerant. The
label must be dated and signed.
Any quality or other issues encountered in the purchased air conditioner, please contact the local MRCOOL
after-sales service department.
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