Grundfos TPE2 Installation And Operating Instructions Manual page 48

17.6.7 Constant differential temperature
Pump variant
TPE3, TPE3 D
TPE2, TPE2 D
The pump maintains a constant differential
temperature in the system and the pump performance
is controlled according to this.
H
Constant differential temperature
This control mode requires either two temperature
sensors or one external differential-temperature
sensor. See the examples below.
The temperature sensors can either be analog
sensors connected to two of the analog inputs or two
Pt100/Pt1000 sensors connected to the Pt100/1000
inputs, if these are available on the specific pump.
Set the sensor in the Assist menu under Assisted
pump setup. See section Assisted pump setup.
Examples
• Factory-fitted temperature sensor and an
external temperature sensor. Only TPE3, TPE3
D.
t
48
Constant differential
temperature
●
●
△t
Q
Δt
t
• Two external temperature sensors.
Constant differential-temperature control is
achievable with two temperature sensors. The
pump uses the inputs from the two sensors and
calculates the differential temperature.
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.
t
t
t
• One external differential-temperature sensor.
The pump uses the input from the sensor to
control the differential temperature.
You can set the sensor manually or by using the
Assist menu. See section Assisted pump setup.
t
Constant differential temperature
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