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Security. 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 Article 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 coolant. 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. If in doubt, one
person should guard the exit. Make sure that the drained refrigerant does not return to the
building.
- Evacuate the refrigerant circuit.
- Purge the refrigerant circuit with nitrogen for 5 minutes.
- Evacuate again.
- Remove the parts to be replaced by cutting and not by flame.
- Purge the soldering point with nitrogen during the soldering process.
- Perform a leak test before charging refrigerant.
• Reassemble the sealed enclosures with precision. If the gaskets are worn, replace them.
• Check the safety equipment before commissioning.
d) Decommissioning
• If safety is affected when the equipment is taken out of service, the refrigerant charge must be
drained before taking out of service.
• Provide sufficient ventilation at the location of the equipment.
EN-14
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