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Beschikbare talen
Beschikbare talen
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:
a) 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.
b) Maintenance
" Portable equipment shall be repaired outside or in a workshop specially equipped for
servicing units with flammable refrigerants.
" Ensure sufficient ventilation at the repair place.
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