Grundfos TPE2 Installation And Operating Instructions Manual page 33

Controller settings
For recommended controller settings, see section
17.18 "Controller"("Controller settings").
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.
See fig. 45.
H
Fig. 45 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 17.48 Assisted pump
"Constant differential
temperature"
●
●
△t
Q
setup.
Examples
• Factory-fitted temperature sensor and an external
temperature sensor. Only TPE3, TPE3 D.
t
t
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
17.48 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 17.48 Assisted pump
t
Fig. 46 "Constant differential temperature"
Controller settings
For recommended controller settings, see section
17.18 "Controller"("Controller settings").
setup.
33