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8. Operating modes
The following operating modes are set on the control panel in the
"OPERATION" menu, display 1.2. See section 11.5.2 Operating
mode (1.2).
Example: Max. curve operation can, for instance, be used in
connection with venting the pump during installation.
Example: Min. curve operation can, for instance, be used in
periods with a very small flow requirement.
9. Control modes
The control mode is set on the control panel in the
"INSTALLATION" menu, display 3.1. See section 11.7.1 Control
mode (3.1).
There are two basic control modes:
• Uncontrolled operation (open loop).
• Controlled operation (closed loop) with a sensor connected.
See sections 9.1 Uncontrolled operation (open loop) and
9.2 Controlled operation (closed loop).
9.1 Uncontrolled operation (open loop)
Example: Operation on constant curve can, for instance, be used
for pumps with no sensor connected.
Example: Typically used in connection with an overall control
system such as the MPC or another external controller.
9.2 Controlled operation (closed loop)
Operating mode Description
Normal
The pump is running in the control mode
selected.
Stop
The pump has been stopped (green indicator
light is flashing).
Min. The pump is running at minimum speed.
Max. The pump is running at maximum speed.
TM03 8813 2507
Min. and max. curves.
The pump speed is kept at a given
set value for minimum and maximum
speed, respectively.
TM03 8479 1607
Constant curve.
The speed is kept at a set value in
the range between the min. and max.
curves.
The setpoint is set in %
corresponding to the required speed.
TM03 8475 1607
TM03 8804 2507
Proportional
differential pressure.
The differential
pressure is reduced at
falling flow rate and
increased at rising
flow rate.
TM03 8476 1607
TM03 8804 2507
Constant differential
pressure, pump.
The differential
pressure is kept
constant,
independently of the
flow rate.
TM03 8476 1607
TM03 8806 2507
Constant differential
pressure, system.
The differential
pressure is kept
constant,
independently of the
flow rate.
TM03 8476 1607
TM03 8805 2507
Constant pressure.
The pressure is kept
constant,
independently of the
flow rate.
TM03 8477 1607
TM03 8807 2507
Constant pressure
with stop function.
The outlet pressure is
kept constant at high
flow rate.
On/off operation at low
flow rate.
TM03 8482 1607
TM03 8808 2607
Constant level.
The liquid level is kept
constant,
independently of the
flow rate.
TM03 8482 1607
TM03 8809 2607
Constant level with
stop function.
The liquid level is kept
constant at high flow
rate.
On/off operation at low
flow rate.
TM03 8478 1607
TM03 8810 2507
Constant flow rate.
The flow rate is kept
constant,
independently of the
head.
TM03 8482 1607
TM03 8811 2507
Constant temperature.
The liquid temperature
is kept constant,
independently of the
flow rate.
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