Bell & Gossett 193 TECHNOVAR VARIABLE SPEED PUMP CONTROLLER AND INTEGRATED AJUSTABLE FREQUENCY DRIVE - Manual (Page 41)

Operating Instruction
41
Enter the required value by pressing the and button ACTU. VALUE DEC.
5 psi
Press the button to change to ENABLE SEQ. CTL
58.0 Hz
ENABLE SEQUENCE CONTROL: (Release frequenz)
The follow-up pump only starts, when the start-value (SET VALUE – ACTUAL VALUE
DECREASE) is reached and the lead pump has reached the programmed release-
frequency.(Adjustable from 0.0 Hz to 70 Hz).
Normally this start frequency is set 1 to 2 Hz lower than the MAX. FREQUENCY If you don’t
want to start a following pump this value has to be set higher than the MAX. FREQUENCY.
Enter the required value by pressing the and button ENABLE SEQ. CONTROL
59.0 Hz
Note: In the standard multicontroller mode, the next pump will not start until both the
system pressure drop and release frequency first pump speed have been reached.
In the synchronous control mode, the first pump only has to reach the release
frequency, then the next pump will start.
Press button briefly to advance to
SWITCH INTERVAL
12 hours
SWITCH INTERVAL:
For changeover of the master pump and follow-up pumps, in order to achieve even
operating hours. Adjustable between 1 hour and 100 operating hours of the Technovar. If
an interval of more than 100 is selected, the automatic changeover is deactivated.
Manual changeover of the master pump in the 1 st display by pressing the -button.
Enter the required value by pressing or button SWITCH INTERVAL
24 hours
After pressing the button for 3 seconds, you leave the sub
menu and the display changes to
SUBMENU
Seq. Control