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7 Operation
7.2.4 Eco Mode
Function
Eco Mode operating mode is an energy-efficient alternative to Proportional-pressure
Control. Eco Mode is based on a linear characteristic curve rather than a quadratic
one. The consequences on the process are illustrated at the example of size 25-100 in
the figure below:
10
[m]
1
6
4
3
4
2
2
5
0
0
2
4
6
Fig. 24: Eco Mode and proportional pressure, example of a size 25-100 pump
1 Maximum operating range
2 System characteristic curve
3 Proportional-pressure Control
characteristic curve
From a physical point of view, the system characteristic curve (2) is always a parabola
through the origin (5) of the coordinate system. When selecting the setpoint make
sure that the intersection of the maximum operating range (1) and the characteristic
curve of the selected control mode (3)/(4) is above or on the system characteristic
curve (2). This prevents undersupply. If, at the same setpoint, the Eco Mode operating
mode is selected, the Eco Mode characteristic curve (4) is a parabola instead of a
straight line. The characteristic curves of both Eco Mode and Proportional-pressure
Control intersect the maximum characteristic curve (6) in the same point. At zero
flow rate the set head in Eco Mode is 50 % lower than in Proportional-pressure
Control operating mode. The system characteristic curve (2) always passes through
the origin (5); it is a parabola, like the characteristic curve of the Eco Mode (4). This
ensures sufficient supply over the entire operating range and markedly reduces the
power input. We recommend using Eco Mode rather than Proportional-pressure
Control. This results in power savings of a maximum of 53 % and an average of 36 %.
The power savings are illustrated in the figure below:
60
[%]
20
0
0
2
4
Fig. 25: Savings potential of Eco Mode compared to Proportional-pressure Control at
the example of a size 25-100 pump
Setting
Press the control button to activate the display from idle mode. The display will show
the current operating mode as well as, in alternation, the electrical input power and
the flow rate. If 5 minutes pass without any settings being made or the control
button being pressed, the display will revert to idle mode.
CalioTherm Pro
6
3
8
[m /h]
12
4 Eco Mode characteristic curve (setpoint
50 %)
5 Origin
6 Maximum characteristic curve
3
6
[m
/h]
8
47 of 76
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