Carrier QHC Series Service Manual page 9

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.
7