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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.
COMPETENCE OF SERVICE PERSONNEL GENERAL
· Special training additional to usual refrigerating equipment repair procedures is required when
equipment with flammable refrigerants is affected.
· In many countries, this training is carried out by national training organisations that are
accredited to teach the relevant national competency standards that may be set in legislation.
· The achieved competence should be documented by a certificate.
TRAINING
· The training should include the substance of the following:
· Information about the explosion potential of flammable refrigerants to show that flammables
may be dangerous when handled without care.
· Information about potential ignition sources, especially those that are not obvious, such as
lighters, light switches, vacuum cleaners, electric heaters.
· Information about the different safety concepts:
· Unventilated – (see Clause GG.2) Safety of the appliance does not depend on ventilation of the
housing. Switching off the appliance or opening of the housing has no significant effect on the
safety. Nevertheless, it is possible that leaking refrigerant may accumulate inside the enclosure
and flammable atmosphere will be released when the enclosure is opened.
· Ventilated enclosure – (see Clause GG.4) Safety of the appliance depends on ventilation of the
housing. Switching off the appliance or opening of the enclosure has a significant effect on the
safety. Care should be taken to ensure a
sufficient ventilation before.
· Ventilated room – (see Clause GG.5) Safety of the appliance depends on the ventilation of the
room. Switching off the appliance or opening of the housing has no significant effect on the
safety. The ventilation of the room shall not be switched off during repair procedures.
· Information about the concept of sealed components and sealed enclosures according to IEC
60079-15:2010.
· Information about the correct working procedures:
COMMISSIONING
· Ensure that the floor area is sufficient for the
refrigerant charge 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.
MAINTENANCE
· Portable equipment shall be repaired outside or in a workshop specially equipped for servicing
units with flammable refrigerants.
EN