[49]
EN
DEHUMIDIFIER
18. 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 designed for the recovered
refrigerant and labeled for that refrigerant (i.e. special cylinders for
the recovery of refrigerant). Cylinders shall be complete with pressure
relief value and associated shut-off values 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 addition, a set of calibrated weighing scales shall be available and
in good work 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