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