Bell & Gossett 193 TECHNOVAR VARIABLE SPEED PUMP CONTROLLER AND INTEGRATED AJUSTABLE FREQUENCY DRIVE - Manual (Page 34)

Operating Instruction
34
8.3 Single Pump – Pump Protection
The Technovar has the ability to protect the pump by shutting off in low/no suction or run out
conditions.
Note: Low/no suction protection depends on the installation of a suction line
pressure switch, or float switch for a tank. This switch is connected to
the Technovar. The cut out setting for a suction pressure switch should
be greater than the minimum incoming pressure, required by the pump.
Note: Run out protection is available for one pump systems and multiple pump
systems with a common suction pipe. (described at chapter ”Conveyor
Limit” 11.30.1 In multiple pump systems with separate suction pipes,
you can not avoid dry running by measuring the system pressure,
because the pressure is produced from another pump in the system.
8.3.1 To set run out protection
Hold the button for 3 seconds and the display changes to PASSWORD
0000
Password:
The password protection prevents untrained personal from accidentally changing of the base
settings:
Set ‘Password 0066’ by pressing or PASSWORD
0066
You will now be able to access all of the alternate menus for all Technovar optional controls.
After entering the password you have to confirm by pressing
the button to advance the display to the next window JOG – MODE
0.0 Hz X.XX psi
JOG-MODE
Actual outgoing frequency and actual analog input are shown. By pressing or in this
menu, the internal controller of the Technovar will be shut off and the inverter changes to
manual mode. With the buttons and you can set any constant speed. Setting of 0,0 Hz
stops the inverter. If the JOG-MODE is left at a frequency higher than 0,0 Hz the inverter will
continue its normal automatic operation.
Press the button repeatedly until you reach
SUBMENU
ERRORS
Hold the button down for 3 seconds to enter the
submenu, until the display changes to
CONVEYOR-LIMIT
disabled