English (GB)
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Before carrying out maintenance and service, flush
the pump thoroughly with clean water. Rinse the
pump parts in water after dismantling.
8.2 Contaminated pumps
The product will be classified as contaminated if it
has been used for a liquid which is injurious to health
or toxic.
If you request Grundfos to service the product,
contact Grundfos with details about the pumped
liquid before returning the product for service.
Otherwise Grundfos can refuse to accept the product
for service.
Any application for service must include details
about the pumped liquid.
Clean the product in the best possible way before
you return it.
Costs of returning the product are to be paid by the
customer.
8.3 Maintenance schedule
Inspect pumps running normal operation every 3000
operating hours or at least once a year. If the dry-
solids content of the pumped liquid is very high or
sandy, check the pump at shorter intervals.
Check the following points:
• Power consumption
See section 6.6.1 Nameplate.
• Oil level and oil condition
When the pump is new or after replacement of
the shaft seal, check the oil level after one week
of operation.
Use Shell Ondina X420 oil or similar type.
See section 8.4 Oil check and oil change.
• Cable entry
• Pump parts
Check the impeller, the pump housing, etc. for
possible wear. Replace defective parts.
See section 8.9 Service kits.
• Ball bearings
Check the shaft for noisy or heavy operation by
turning 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
Grundfos or a service workshop authorised by
Grundfos.
• Grinder system and parts
In case of frequent choke-ups, check the grinder
system for visible wear. When worn, the edges of
the grinding parts are round. Compare with a new
grinder system.
Except for service on the pump parts, all
other service work must be carried out by
Grundfos or a service workshop
authorised by Grundfos and approved for
servicing explosion-proof products.
If the pump is inactive for long periods of
time, we recommend that you check the
function of the pump.
Service videos can be found in Grundfos
Product Center at www.grundfos.com.
A possible replacement of the power cable
must be carried out by Grundfos or a
service workshop authorised by Grundfos.
CAUTION
Biological hazard
Minor or moderate personal injury
- Flush the pump thoroughly with clean
water and rinse the pump parts in water
after dismantling.
Make sure that the cable entry is
watertight and that the cables are not
sharply bent and/or pinched.
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