Publicidad
Idiomas disponibles
Idiomas disponibles
ii) COMPETENCE OF SERVICE STAFF
→ General
Special training, in addition to normal refrigeration equipment repair procedures, is required when
equipment containing flammable refrigerants is affected.
In many countries, this training is provided by national training organizations accredited to teach
relevant national skill standards that may be defined in legislation.
The skills acquired must be documented by a certificate.
→ Training
The training should include the following:
• Information on the explosion potential of flammable refrigerants indicating that flammable
products can be dangerous when handled carelessly.
• Information on potential ignition sources, especially those that are not obvious, including lighters,
light switches, vacuum cleaners, electric heaters.
• Information on the various security concepts:
- Lack of ventilation (see clause GG.2): The safety of the device does not depend on the
ventilation of the housing. Switching off the device or opening the housing has no significant effect
on safety. However, it is possible for leaking refrigerant to accumulate inside the housing and a
flammable atmosphere will be evolved when opening the housing.
- Ventilated housing (see Clause GG.4): The safety of the device depends on the ventilation of the
housing. Switching off the device or opening the case has a significant impact on safety.
Precautions should be taken to ensure sufficient ventilation beforehand.
- Ventilated room (see clause GG.5): The safety of the appliance depends on the ventilation of the
room. Switching off the device or opening the housing has no significant effect on safety. Room
ventilation should not be stopped during repair procedures.
• Information on the concept of sealed components and housings in accordance with IEC 60079-
15: 2010.
→ Information on the correct procedures for carrying out the work:
a) Commissioning
• Make sure that the floor area is sufficient for the refrigerant charge or that the ventilation duct is
correctly mounted.
• Connect the pipes and perform a leak test before charging refrigerant.
• Check the safety equipment before commissioning.
b) Maintenance
• Portable equipment should be repaired outdoors or in a workshop specially equipped to service
units with flammable refrigerants.
• Ensure sufficient ventilation at the repair site.
• Be aware that equipment malfunction can be caused by loss of refrigerant and that refrigerant
leakage is possible.
• Discharge the capacitors so as not to cause sparks. The standard procedure for shorting the
capacitor terminals generally creates sparks.
• Reassemble the sealed enclosures with precision. If the gaskets are worn, replace them.
• Check the safety equipment before commissioning.
c) Repair
• Portable equipment should be repaired outdoors or in a workshop specially equipped to service
units with flammable refrigerants.
• Ensure sufficient ventilation at the repair site.
• Be aware that equipment malfunction can be caused by loss of refrigerant and that refrigerant
leakage is possible.
• Discharge the capacitors so as not to cause sparks.
• When brazing is required, the following procedures should be performed in the correct order:
- Drain the refrigerant. If recovery is not required by national regulations, drain the refrigerant to
the outdoors. Make sure that the drained refrigerant does not present any danger. When in doubt,
EN-13
Publicidad
