Bell & Gossett 193 TECHNOVAR VARIABLE SPEED PUMP CONTROLLER AND INTEGRATED AJUSTABLE FREQUENCY DRIVE - Manual (Page 51)

Operating Instruction
51
The Actuator application is only used if you have an external controller and the Technovar is
used as a standard frequency converter. In the Actuator-Mode, the internal controller is shut
off, and the output frequency is proportional to the input signal (X1/2) Þ 4-20 mA = 0 - f
max
.
The frequency changes with the programmed ramps 1 and 2. The functions of low water,
thermal protection and external ON/OFF are still working.
If MANUAL CONTROL is selected, the parameter REQUIRED VALUE will change to MANUAL
CONTROL in the main menu, where the actual frequency and the actual value is displayed
(according to the JOG-MODE in the submenu).
Now the frequency can be changed with the and . buttons, and the speed of the pump
will change with the fasten ramps. After selecting the right frequency, it can be saved with
the standard SAVE.
After a supply failure, the pump will then run with this selected frequency (depending on the
parameter AUTO-START).
The frequency can be changed between the set minimum and maximum frequency.
In the 1 st display, there is shown the actual frequency.
NOTE: CONFIG. FMIN will not work in this mode.
Attention Driving the pump in a not allowed speed range can damage the motor or the
Technovar-head!
Press on the Technovar to change to
10.17 Control Response
REGULATION MODE
Normal
Normal: Speed is increased with falling actual value
signals. (e.g.: Control at constant output pressure).
Inverse: Speed is reduced with falling actual value signal, (e.g.: Control at constant
suction pressure or at constant level).
Press on the Technovar to change to