Contaminated Pumps - Grundfos DW series Montage- Und Betriebsanleitung

• Cable entry
Make sure that the cable entry is watertight and
that the cables are not bent sharply and/or
pinched.
• Pump parts
Check the impeller, pump housing, diffuser,
impeller disc etc. for possible wear. Replace
defective parts.
• Ball bearings
Check the shaft for noisy or heavy operation (turn
the shaft by hand). Replace defective ball
bearings.
A general overhaul of the pump is usually
required in case of defective ball bearings or poor
motor function. This work must be carried out by
the manufacturer or a competent workshop.

8.1 Contaminated pumps

If a pump has been used for a liquid which
Note
is injurious to health or toxic, the pump will
be classified as contaminated.
If Grundfos is requested to service the pump,
Grundfos must be contacted with details about the
pumped liquid, etc. before the pump is returned for
service. Otherwise Grundfos can refuse to accept
the pump for service.
Possible costs of returning the pump are paid by the
customer.
However, any application for service (no matter to
whom it may be made) must include details about
the pumped liquid if the pump has been used for
liquids which are injurious to health or toxic.
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