Description Of Functions - Grundfos Control DDD Montage- Und Betriebsanleitung

6.1 Description of functions

Control DDD is designed for water distribution networks. At the
pumping station, the controller controls the pump speed based on
actual flow rate and pressure.
To optimise the proportional-pressure curve used by the
controller, a number of remote sensors (up to ten) are installed at
critical points in the distribution network, that is where stable
pressure is required. The remote sensors log the pressure
throughout the day and send the logged data to the controller as
text messages once every 24 hours. The controller automatically
adapts its proportional-pressure curve every day, ensuring stable
pressure at critical points. When the water demand is low, the
controller lowers the outlet pressure at the pumping station to
save energy and to reduce leakages and wear of the pipes.
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Fig. 5 System overview
Pos. Description
1 Control DDD
2 Booster pumps
3 Primary outlet pressure sensor
4 Flowmeter at pumping station
5
6 Remote sensors
7
8
P Q
2 3 4
P
24h
P
24h
P
24h
5
7
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