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6. Servicing the product
6.1 Contaminated pumps
CAUTION
Biological hazard
Minor or moderate personal injury
‐
Flush the pump thoroughly with water
and rinse the pump parts in water after
dismantling.
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 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 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.
6.2 Operating checks
CAUTION
High sound pressure level
Minor or moderate personal injury
‐
Use hearing protection.
1. Check the pump and pipes for leaks.
2. Check and record the pressure gauge readings
for future reference.
3. Check the differential pressure. If the differential
pressure is lower than anticipated, the motor may
be overloaded. See description of measuring
instruments in section Measuring instruments.
4. Measure the motor current consumption and
compare the result with the rated current stated
on the motor nameplate. In case of overload,
throttle the outlet isolating valve or throttle valve
until the motor is no longer overloaded.
5. Check the bearings for lubrication and
temperature. Normal temperature is 70 °C
(158 °F). The maximum temperature depends on
the type of lubrication. See the lubricating plate on
the pump.
Stop the pump immediately if you notice any defects.
Do not start the pump unless the defects have been
remedied. See section Fault finding the product.
Report immediately to the supplier that you cannot
remedy the defects.
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The operating checks apply both during
the startup procedure and when checking
the pump during normal operation.
Related information
3.4.6 Measuring instruments
8. Fault finding the product
6.3 Maintaining the product
DANGER
Electric shock
Death or serious personal injury
‐
Before starting work on the pump,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
WARNING
Hot or cold surface
Death or serious personal injury
‐
Pay attention to the direction of the
vent hole, and ensure that the
escaping water does not cause injury
to persons or damage to the motor or
other components.
‐
In hot-water installations, pay special
attention to the risk of injury caused by
scalding hot water and hot surfaces.
‐
In cold-liquid installations, pay special
attention to the risk of injury caused by
cold liquids and cold surfaces.
WARNING
Crushing of hands
Death or serious personal injury
‐
Make sure the product won't tilt and fall
down during transportation, installation
and unloading.
‐
The unsecured pump must
be placed on horizontal plane to
prevent it from tilting and fall down.
6.3.1 General information
Routine maintenance is essential to maintain the
pump in a good condition.
A high degree of cleanliness must be maintained
during all maintenance procedures.
Consumable items including spare parts dismantling
and re-assembly:
•
tools
•
re-assembly procedure.
Detailed information is mentioned in service manual.
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