Mitsubishi SRK20ZSX-W Technical Manual page 64

• Transport of equipment containing flammable refrigerants
Transportation regulations of each country must be complied.
• Marking of equipment using signs
Employers should ensure that employees receive suitable and sufficient instruction and training on the meaning of appropriate afety
signs and the actions that need to be taken in connection with these signs.
• Competence of service personnel
Service personnel who handle this air-conditioner are required to complete a special training course, in addition to ordinary repairing
procedures. The training must include following items.
1.Information about the explosion potential of flammable refrig rants to show that flammables may be dangerous when handled wit out
care.
2.Information about potential ignition sources, especially those that are not obvious, such as lighters, light switches, vacuum cleaners,
electric heaters.
3.Information concerning the concept of safety
Although safety of this equipment does not rely on the ventilation of enclosure, in the event that the enclosure is opened up to
atmosphere while remaining refrigerant is accumulated in it, fl mmable atmosphere could be released to the outside.
4.Information about the concept of sealed components and sealed enclosures according to IEC 60079-15:2010.
5.Information about the correct working procedures:
①Commissioning
• Ensure that the floor area is sufficient for the refrigerant ch ge or that the ventilation duct is assembled in a correct manner.
• Connect the pipes and carry out a leak test before charging with refrigerant.
• Check safety equipment before putting into service.
②Maintenance
• Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with flammable refrigeran s.
• Ensure suficiente ventilation at the repair place
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won't cause any spark. The standard procedure to short circuit the capacitor terminals usually
creates sparks.
• Reassemble sealed enclosures accurately. If seals are worn, replace them.
• Check safety equipment before putting into service.
③Repair
• Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with flammable refrigeran s.
• Ensure suficiente ventilation at the repair place
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won't cause any spark.
• In the event that a brazing work is required, the refrigerant must be collected in a proper collecting container.
• Purge the braze point with nitrogen during the brazing procedure.
• Carry out a leak test before charging with refrigerant.
• Reassemble sealed enclosures accurately. If seals are worn, replace them.
④Decommissioning
• If the safety is affected when the equipment is putted out of service, the refrigerant charge shall be removed before
decommissioning.
• Ensure suficiente ventilation at the equipment location
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won't cause any spark.
• Collect refrigerant always in a proper collecting container.
• After collecting refrigerant, charge nitrogen gas till the inside of refrigerating cycle is filled up to the atmospheric press re.
• Put a label on the equipment that the refrigerant is removed.
⑤Disposal
• Ensure suficiente ventilation at the working place
• Collect refrigerant always in a proper collecting container.
• Waste material must be collected and disposed according to the national or local guidelines.
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'18 • SRK-T-234