ENGLISH-6
Safety precautions
Leakage detection methods
The leakage detector shall be calibrated in a refrigerant-free area.
Make sure that the detector is not a potential source of ignition.
The leakage detector shall be set to the LFL (lower ammability limit).
The use of detergents containing chlorine shall be avoided for cleaning because the chlorine may react with the
refrigerant and corrode the pipings.
If leakage is suspected, naked ames shall be removed.
If a leakage is found while in brazing, the entire refrigerant shall be recovered from the product or isolated (e.g. using
shut-o valves). It shall not be directly released to the environment. Oxygen free nitrogen (OFN) shall be used for purging
the system before and during the brazing process.
The work area shall be checked with an appropriate refrigerant detector before and during work.
Ensure that the leakage detector is appropriate for use with ammable refrigerants.
Labelling
The parts shall be labelled to ensure that they have been decommissioned and emptied of refrigerant.
The labels shall be dated.
Make sure that the labels are axed on the system to notify it contains ammable refrigerant.
Recovery
When removing refrigerant from the system for servicing or decommissioning, it is recommended to remove the entire
refrigerant.
When transferring refrigerant into cylinders, make sure that only the refrigerant recovery cylinders are used.
All cylinders used for the recovered refrigerant shall be labelled.
Cylinders shall be equipped with pressure relief valves and shut-o valves in a proper order.
The recovery system shall operate normally according to the specied instructions and shall be suitable for refrigerant
recovery.
In addition, the calibration scales shall operate normally.
Hoses shall be equipped with leak-free disconnect couplings.
Before starting the recovery, check for the status of the recovery system and sealing state. Consult with the manufacturer
if suspected.
The recovered refrigerant shall be returned to the supplier in the correct recovery cylinders with the Waste Transfer Note
attached.
Do not mix refrigerants in the recovery units or cylinders.
If compressors or compressor oils are to be removed, make sure that they have been evacuated to the acceptable level to
ensure that ammable refrigerant does not remain in the lubricant.
The evacuation process shall be performed before sending the compressor to the suppliers.
Only the electrical heating to the compressor body is allowed to accelerate the process.
Oil shall be drained safely from the system.
Never install a motor-driven equipment to prevent ignition.
Empty recovery cylinders shall be evacuated and cooled before recovery.
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