42
C AUTION
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.
C AUTION
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. ( Section 6.2 Page 37)
While the pump is in operation, observe and check the following:
. The pump must run quietly and free from vibrations at all times.
. In case of oil lubrication, ensure the oil level is correct. ( Section 6.1.2 Page 31)
. Check the shaft seal. ( Section 6.1.11 Page 36)
. 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 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.
. Monitor the bearing temperature.
The bearing temperature must not exceed 90 °C (measured on the outside of the bearing
bracket).
C AUTION
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).
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 h depending on the conditions).
7 Servicing/Maintenance
