▪ Check the rolling element bearings for running noises.
Vibrations, noise and an increase in current input occurring during unchanged
operating conditions indicate wear.
▪ Monitor the correct functioning of any auxiliary connections.
▪ Cooling system
Take the pump out of service at least once a year to thoroughly clean the cooling
system.
▪ Monitor the stand-by pump.
To make sure that the stand-by pumps are ready for operation, start them up
once a week.
▪ Keep the stand-by pump warm.
Observe the following conditions to make sure stand-by pumps are operational
and kept warm:
– All cooling points are in operation.
–
The permissible nozzle forces and moments are not exceeded.
– In extreme cases, contact the manufacturer.
▪ Monitor the bearing temperature.
The bearing temperature must not exceed 90 °C (measured on the outside of the
bearing bracket).
CAUTION
Operation outside the permissible bearing temperature
Damage to the pump!
▷ The bearing temperature of the pump (set) must never exceed 90 °C (measured
on the outside of the bearing bracket).
7.2.2 Inspection work
DANGER
Excessive temperatures caused by friction, impact or frictional sparks
Explosion hazard!
Fire hazard!
Damage to the pump set!
▷ Regularly check the coupling guard, plastic components and other guards of
rotating parts for deformation and sufficient distance from rotating parts.
7.2.2.1 Checking the coupling
Check the flexible elements of the coupling. Replace the relevant parts in due time if
there is any sign of wear and check the alignment.
7.2.2.2 Checking the clearances gaps
For checking the clearances gaps remove impeller 230, if required. (⇨ Section 7.4.5
Page 47
)
If the clearance is larger than permitted (see the following table), replace casing
wear ring 502.01/502.02 and/or impeller wear ring 503.01/503.02.
The clearances given refer to the diameter.
7 Servicing/Maintenance
42 of 76
RPH
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