9
MAINTENANCE
Check regularly the insulation resistance between pump winding and cabinet which shall
bot be lower than 2M Ohm or measures shall be taken. The requirement must be met for
operation.
The following steps shall be taken to dismantle and repair the pump in regular maintenance
or trouble shooting:
Dismantle: Check all the vulnarable parts including ball bearing, mechanical seal, impeller, non
Pressure test: Water pressure test on the part of the pumpshall be made after the repair or
replacement in which the pressure shall be 0,2 MPa, which shall last for 5 min. until no leakage
or sweating is found.
Anti frost measures shall be taken when the temperature is lower than 4 C to avoid cracks
in the pump.
If the pump wont be used for a long time, remove the pipeline and loosen the water
discharging tap to drain off the water. Then wash and clean the main parts for anti rust tre-
atment. Put in the draught place and store properly.
Although the care taken at the production side and strict test application, If the device gets
broken, all the maintenance should be carried our by the authorised services.
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