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8 Servicing/Maintenance
60 of 76
EtaLine Pro
1168.87/01-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.
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.
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 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.
▪
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 bearing temperature must not exceed 90 °C (measured on the motor
housing).
▪
Deviations from normal operation such as increased power consumption,
temperatures or vibrations, unusual noises or odours, tripping of monitoring
devices, etc.
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).