10 WILO SE 09/2009
E
nglish
arrow on the fan hood of the motor. II necessary,
change any two supply phases.
– Never use the power supply cable for lifting,
transporting or fixing of the pump.
– The pump must not be subjected to direct water
spray.
7. Maintenance
Isolate from power supply before checking the
pump!
In principle, damage to the connecting cable
should only be repaired by a qualified electrician.
To ensure highest operational safety and reliabi-
lity at lowest possible cost the following routine
checks are recommended:
– Check on diaphragm vessel pressure (at least
1.4 bar on standard settings of pressure switch).
– Check pump for leaks.
On danger of freezing it is necessary to comple-
tely drain the pump using the drain plug at the
bottom of the pump housing.
For prolonged standdown periods (e. g. winter
shutdown) the pump needs thorough scouring,
complete draining and dry storage.
On re-commissioning check tor free rotation by
brieflyswitching-on the pump. Then re-fill with
water.
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