The pump set is ready for operation when the fluid level has reached dimension "R3"
as a minimum (see general arrangement drawing/outline drawing).
Fig. 19: Minimum fluid level
NOTE
For pump sets with cutters it is recommended to continue pump operation for about 10
seconds after the minimum suction level has been reached.
Operation with a dropping fluid level up to dimension R1 (see outline drawing) is
permissible. Please note that during that time frequent starting and stopping of the
pump set must be avoided.
6.2.4 Density of the fluid handled
The power input of the pump increases in proportion to the density of the fluid
handled.
CAUTION
Impermissibly high density of the fluid handled
Motor overload!
▷
Observe the information on fluid density indicated in the data sheet.
▷
Make sure the power reserve of the motor is sufficient.
6.2.5 Supply voltage
DANGER
Non-compliance with permissible supply voltage tolerances
Explosion hazard!
▷
Never operate an explosion-proof pump (set) outside the specified range.
The maximum permissible deviation in supply voltage is ±10% of the rated voltage.
The voltage difference between the individual phases must not exceed 1%.
6.2.6 Frequency inverter operation
DANGER
Operation outside the permitted frequency range
Explosion hazard!
▷
Never operate explosion-proof pump sets outside the specified range.
Frequency inverter operation of the pump set is permitted in the frequency range
from 30 to 50 Hz.
6 Commissioning/Start-up/Shutdown
34 of 66
Amarex® N
Goodnal STP ST041 Biological Treatment (KSB WAS PUMP 1 & 2 PU-0530-010 OM Instructions) Vendor Manual
Q-Pulse Id VM381
Active 29/10/2013
Page 36 of 76
