WACO VC3504, User Manual

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COMPETENCE OF SERVICE PERSONNEL
General
Additional special training is required for equipment with flammable refrigerants.
In many countries, this training is carried out by national training organizations that are
accredited to teach the relevant national competency standards.
The achieved competence should be documented by a certificate.
Training
Training should include the following:
Information about the potential of flammable refrigerants to explode and proper caution
that flammables may be dangerous when handled without care.
Information about potential ignition sources, especially those that are not immediately
obvious, such as lighters, light switches, vacuum cleaners, and electric heaters.
Information about different safety principles:
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 a 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 sufficient ventilation beforehand.
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 sealed components and sealed enclosures according to
IEC 60079-15:2010.
Information about 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 commissioning.