English (GB)
29
14.5.3 Proportional pressure
The head of the pump is reduced at decreasing water demand
and increased at rising water demand. See fig.
This control mode is especially suitable in systems with relatively
large pressure losses in the distribution pipes. The head of the
pump will increase proportionally to the flow in the system to
compensate for the large pressure losses in the distribution
pipes.
The setpoint can be set with an accuracy of 0.1 metre. The head
against a closed valve is half the setpoint.
Fig. 38
Proportional pressure
Fig. 39
Proportional pressure
Controller settings
For recommended controller settings, see section
14.15 Controller (Controller settings)
.
14.5.4 Constant pressure
We recommend this control mode if the pump is to deliver a
constant pressure, independently of the flow in the system. See
fig.
Fig. 40
Constant pressure
This control mode requires an external differential-pressure
sensor as shown in the examples below. You can set the pressure
sensor in the "Assist" menu. See section
Fig. 41
Constant pressure
Controller settings
For recommended controller settings, see section
14.15 Controller (Controller settings)
Pump variant
Proportional pressure
TPE3, TPE3 D
●
TPE2, TPE2 D
-
T
M
05
79
09
16
13
Example
• Factory-fitted differential-pressure sensor.
H
Q
H
set
H
set
2
p
Pump variant
Constant pressure
TPE3, TPE3 D
-
TPE2, TPE2 D
●
TM
05 79
01 161
3
Examples
• One external differential-pressure sensor.
H
Q
p
p
