English (GB)
30
14.5.5 Constant temperature
This control mode ensures a constant temperature. Constant
temperature is a comfort control mode that can be used in
domestic hot-water systems to control the flow to maintain a fixed
temperature in the system. See fig.
. When you use this control
mode, do not install any balancing valves in the system.
Fig. 42
Constant temperature
This control mode requires either an internal or external
temperature sensor as shown in the examples below:
Fig. 43
Constant temperature
Controller settings
For recommended controller settings, see section
14.15 Controller (Controller settings)
.
14.5.6 Constant differential pressure
The pump maintains a constant differential pressure,
independently of the flow in the system. See fig.
. This control
mode is primarily suitable for systems with relatively small
pressure losses.
Fig. 44
Constant differential pressure
This control mode requires either an internal or external
differential-pressure sensor or two external pressure sensors as
shown in the examples below:
Fig. 45
Constant differential pressure
Controller settings
For recommended controller settings, see section
14.15 Controller (Controller settings)
Pump variant
Constant temperature
TPE3, TPE3 D
●
TPE2, TPE2 D
●
T
M
05
79
00
16
13
Examples
• Factory-fitted temperature sensor. Only TPE3, TPE3 D.
• One external temperature sensor.
H
Q
t
t
t
t
Pump variant
Constant differential
pressure
TPE3, TPE3 D
●
TPE2, TPE2 D
●
TM
05
79
01
16
13
Examples
• Factory-fitted differential-pressure sensor (only TPE3, TPE3
D).
• 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
.
• 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
.
H
Q
p
p
p
p
p
p
p
p
p
