KSB ILN, Operating Manual

Page: 43 / 92

7 Servicing/Maintenance
43 of 92
ILN / ILNC / ILNR
5211.8/08-EN
CAUTION
Increased wear due to dry running
Damage to the pump set!
▷
Never operate the pump set without liquid fill.
▷ Never close the shut-off element in the suction line and/or supply line during
pump operation.
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. (
ð Section 6.2, Page 38)
While the pump is in operation, observe and/or check the following:
▪
The pump must run quietly and free from vibrations at all times.
▪ Check the static sealing elements for leakage.
▪ 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 stand-by pumps are ready for operation, start them up once a
week.
▪ Monitor the bearing temperature.
The final bearing temperature may exceed the ambient temperature by up to
40 °C, however, it must not exceed 90 °C (measured on the outside of the bearing
bracket).
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).
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).