KSB Etanorm V, Operating Manual

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7 Servicing/Maintenance
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Etanorm V
1228.87/01-EN
CAUTION
Impermissibly high temperature of fluid handled
Damage to the pump!
▷
Prolonged operation against a closed shut-off element is not permitted
(heating up of the fluid).
▷
Observe the temperature limits in the data sheet and in the section on
operating limits.
While the pump is in operation, observe and check the following:
▪ The pump must run quietly and free from vibrations at all times.
▪ Check the shaft seal.
▪
Check the static seals for leakages.
▪ 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 stand-by pump.
To make sure that the stand-by pumps are ready for operation, start them up
once a week.
▪ Monitor the bearing temperature.
The bearing temperature must not exceed 90 °C (measured on the outside of the
motor housing).
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 motor housing).
NOTE
After commissioning, increased temperatures may occur at grease-lubricated rolling
element bearings due to the running-in process. The final bearing temperature is
only reached after a certain period of operation (up to 48 hours depending on the
conditions).
7.2.2 Inspection work
7.2.2.1 Checking the clearances
If the clearances need to be checked, remove the impeller. If the clearance gap is
larger or smaller than permitted (see the following table), replace casing wear rings
502.01 and/or 502.02.
The clearances given refer to the diameter.