Xylem LOWARA e-SV Series, Инструкция по установке, эксплуатации и обслуживанию

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en - Original instructions
e-SV series - Installation, Operation and Maintenance Manual 31
6 Maintenance
6.1 Precautions
Before starting work, make sure that the instructions in the Introduction and Safety sections
have been fully read and understood.
WARNING:
Maintenance must be done by a technician possessing the technical-professional requirements
outlined in the current regulations.
WARNING:
Always wear personal protective equipment.
WARNING:
Always use suitable working tools.
WARNING:
In the case of liquids that are excessively hot or cold, pay attention to the risk of injury.
DANGER: Electrical hazard
Before starting work, check that the unit is unplugged and that the pump unit, the control
panel and the auxiliary control circuit cannot restart, even unintentionally.
DANGER: Electrical hazard
If the unit is connected to the frequency converter, disconnect the mains power supply and
wait at least 10 minutes for the residual current to dissipate.
6.2 Maintenance every 4000 hours of operation, or every year
When the first of the two limits is reached:
1.
Measure the pressure at zero flow rate and compare it with the pressure measured during
initial start-up; if the pressure has decreased by more than 15%, check the condition of
impeller, pump body and wear rings.
2. Check the unit for unwanted noise and vibrations.
3. Check that there is no liquid leaking from the unit or pipes.
4. Check that all the screws and bolts of the unit and pipes are properly fastened.
5. Check that the insulation resistance of the motor is greater than 500 MΩ, applying a test
voltage of 500 Vdc for 1 minute.
6. Check the terminal board of the motor for any signs of overheating and arc flashes.
7. Check the condition of the motor's cooling fan and clean it.
6.3 Long periods of inactivity
1. Close the on-off valve on the suction side.
2. Completely empty the unit.
3. Protect the unit against freezing.
4. Before restarting the unit, check that the shaft is rotating freely, without mechanical
impediments.