Grundfos TPE2 - Page 47

17.6.6 Constant differential pressure
Pump variant
Constant differential
pressure
TPE3, TPE3 D ●
TPE2, TPE2 D ●
The pump maintains a constant differential pressure,
independently of the flow in the system. This control
mode is primarily suitable for systems with relatively
small pressure losses.
H
Q
TM057901
Constant differential pressure
The setting range is between 12.5 % of maximum
head and 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. Only
TPE3, TPE3 D.
p
• One external differential-pressure sensor.
The pump uses the input from the sensor to
control the differential pressure.
You can set sensor manually or by using the
Assist menu. See section Assisted pump setup.
p
p
• 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.
The sensors must have the same unit and must
be set as feedback sensors. You can set the
sensors manually, sensor by sensor, or by using
the Assist menu. See section Assisted pump
setup.
p
p
p
p
p
p
Constant differential pressure
Controller settings
For recommended controller settings, see the section
on the controller (controller settings).
Related information
17.17 Controller (Controller settings)
17.46 Assisted pump setup
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