KSB Amarex N, Operating Manual

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6 Commissioning/Start-up/Shutdown
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Amarex N
CAUTION
Pumping solids-laden fluids at reduced speed
Increased wear and clogging!
▷ Never operate the pump set with flow velocities below 0.7 m/s in horizontal
pipes and 1.2 m/s in vertical pipes.
6.2.4 Fluid handled
6.2.4.1 Temperature of the fluid handled
The pump set is designed for transporting liquids. The pump set is not operational
under freezing conditions.
CAUTION
Danger of frost/freezing
Damage to the pump set!
▷ Drain the pump set or protect it against freezing.
Refer to the maximum permissible fluid and ambient temperature on the name plate
and in the data sheet.
6.2.4.2 Minimum level of fluid handled
DANGER
Pump set running dry
Explosion hazard!
▷ Never allow an explosion-proof pump set to run dry!
CAUTION
Fluid level below the specified minimum
Damage to the pump set by cavitation!
▷
Never allow the fluid level to drop below the specified minimum.
The pump set is ready for operation when the fluid level has reached dimension "R3"
as a minimum (see outline drawing).
Fig. 18:
Minimum fluid level
NOTE
For pump sets with cutters we recommend continuing pump operation for about 10
seconds after the minimum suction level has been reached (see dimension RS in the
outline drawing).