9.5.3 Constant temperature
This control mode ensures a constant temperature.
Constant temperature is a comfort control mode that
you can use in domestic hot-water systems to control
the flow to maintain a constant temperature in the
system.
TM057900
Constant temperature
This control mode requires either an internal or
external temperature sensor as shown in the
examples below.
Example:
• One external temperature sensor
TM057884
TM057885
Controller settings
For the recommended controller settings, see the
section on the controller.
Related information
9.16 Controller (Controller settings)
9.5.4
Constant differential pressure
The pump maintains a constant differential pressure,
independently of the flow rate in the system. This
control mode is primarily suitable for systems with
relatively small pressure losses.
TM057901
Constant differential pressure
The setting range is between 12.5 % and 100 % of
maximum head. This control mode requires either an
internal or external differential-pressure sensor or two
external pressure sensors as shown in the examples
below.
Examples:
• Factory-fitted differential-pressure sensor.
TM057880
• One external differential-pressure sensor.
The pump uses the input from the sensor to
control the differential pressure.
You can set the sensor manually or by using the
Assist menu. See the section on assisted pump
setup.
TM057886
TM057887
• Two external pressure sensors.
Constant differential-pressure control is
achievable with two individual pressure sensors.
The pump uses the inputs from the two sensors
and calculates the differential pressure.
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