GB
83
c) Repair
- 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.
- Be aware that malfunction of the equipment may
be caused by refrigerant loss and a refrigerant leak
is possible.
- Discharge capacitors in a way that won’t cause any
spark.
- When brazing is required, the following procedures
shall be carried out in the right order:
* Remove the refrigerant. If the recovery is not required
by national regulations, drain the refrigerant to the
outside. Take care that the drained refrigerant will not
cause any danger. In doubt, one person should guard
the outlet. Take special care that drained refrigerant
will not float back into the building.
* Evacuate the refrigerant circuit.
* Purge the refrigerant circuit with nitrogen for 5 min.
* Evacuate again.
* Remove parts to be replaced by cutting, not by
flame.
* Purge the braze point with nitrogen during the
brazing procedure.
* Carry out a leak test before charging with refrigerant.
- Reassemble sealed enclosures accurately. If seals
are worn, replace them.
- Check safety equipment before putting into service.
d) Decommissioning
- If the safety is affected when the equipment is
