Vostok VOSPAC10KWA, User Manual

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11
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.
•
Be aware that malfunction of the equipment may be caused by refrigerant loss and
refrigerant leak is possible.
•
Discharge capacitors in a way that won’t cause any spark. The standard procedure to
short circuit the capacitor terminals usually create sparks.
•
Reassemble sealed enclosures accurately. If seals are worn, replace them.
•
Check safety equipment before putting into service.
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
o
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.
o
Evacuate the refrigerant circuit.
o
Purge the refrigerant circuit with nitrogen for 5 min.
o
Evacuate again.
o
Remove parts to be replaced by cutting, not by flame.
o
Purge the braze point with nitrogen during the brazing procedure.
o
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.