Bell & Gossett 193 TECHNOVAR VARIABLE SPEED PUMP CONTROLLER AND INTEGRATED AJUSTABLE FREQUENCY DRIVE - Manual (Page 49)

Operating Instruction
49
10.9 Minimum Frequency
MIN. FREQUENCY
0.0 Hz
Here you can set the minimum frequency between 0,0
and Max.frequency.
Attention!: If there is set f>fmin in the parameter CONFIG. FMIN the pump will not stop in
the normal mode. It will keep running with the set minimum frequency.
!! Possibility of overheating of the pump !!
Press on the Technovar to change to
10.10 Operation at the minimum frequency
CONFIG FMIN
f => fmin
If you have selected „f->0“ the frequency will go
down to the selected minimum frequency.
Then the inverter will keep running for the selected time and after this time the Technovar
will stop automatically.
If the selection is „f->f
min
“ you can not run the pump below the set minimum frequency. In
the controller, actuator and multi controller mode the pump will never run below the set
minimum frequency (the pump will only stop with an external on/off-(terminals X1/4 and
X1/5) or in case of a failure.
Press on the Technovar to change to
10.11 Delay time for shut off at minimum frequency
STOP-DELAY FMIN
5 s
After running the pump for this selected time at
minimum frequency, the pump will stop, if parameter
CONFIG. FMIN it set to f Þ 0 Adjustable between 0 and 100s.
Press on the Technovar to change to
10.12 Boost
BOOST
5.0 %
The stated value determines the course of the
U/f-curve.
Setting of the motor starting voltage in % of rated voltage .
Settings of 0...25% of maximum output voltage are possible. However, care should be taken
that settings are kept as low as possible so that the motor does not become thermally
overloaded at lower frequencies.
Press on the Technovar to change to