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7. Storing the product
For periods of storage the pump must be protected
against moisture and heat.
After a period of storage, inspect the pump before
putting it into operation. Make sure that the impeller
can rotate freely. Pay attention to the condition of the
shaft seals, O-rings and the cable entries.
Leave the cable-end protectors on the
power and control cables until starting the
electrical connection. Whether insulated or
not, the free cable end must never be
exposed to moisture or water. Non-
compliance with this may cause damage
to the motor.
If the pump is being stored for more than
one month, turn the impeller at least every
month to prevent the seal faces of the
lower mechanical shaft seal from seizing
up.
If you do not do this, the shaft seal may be
damaged when the pump is started.
If the impeller cannot be turned, contact
Grundfos or an authorised service
workshop.
WARNING
Crushing hazard
Death or serious personal injury
‐
Do not turn the impeller by hand.
Always use an appropriate tool.
16
8. Maintenance and service
WARNING
Electric shock
Death or serious personal injury
‐
Before working on the product, switch
off the power supply. Make sure that
the power supply cannot be switched
on unintentionally.
CAUTION
Crushing of hands
Minor or moderate personal injury
‐
Make sure that all rotating parts
stopped moving.
Before maintenance and service, make sure that the
pump is thoroughly flushed with clean water. Rinse
the pump parts in water after dismantling.
CAUTION
Pressurised system
Minor or moderate personal injury
‐
When unscrewing the inspection screw
of the oil chamber, note that pressure
may have built up in the chamber. Do
not remove the screw until the
pressure is fully relieved.
Normally operating pumps should be inspected at
least once a year. If the pumped liquid is very muddy
or sandy, inspect the pump at shorter intervals.
When the pump is new or after replacement of the
shaft seals, check the oil level after one week of
operation.
For long and trouble-free operation of the pump,
check the following points regularly:
•
power consumption
•
oil level and oil condition.
If the oil contains water, it becomes greyish white.
Water in the oil may be due to a defective shaft
seal. The oil should be replaced after 3000 hours
of operation. Use Shell Ondina X420 oil or a
similar type.
Used oil must be disposed of according to
local regulations.
Pump type
APG.50.48
APG.50.65
APG.50.92
•
Cable entry
Quantity of oil in
oil chamber [l]
1.90
1.90
1.90
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