7 Operation
43 of 68
Calio
1157.821/04-EN
7.2.5 Dynamic control
Q [m
3
/h]
H
[
m
]
1
2
3
4
Fig. 23:
Principle of dynamic control
1 Excess energy input
3 Control curve
2 Dynamic control
4 Minimum characteristic curve
The dynamic control system (2) detects when the selected control curve (3) is above
the minimum characteristic curve
4)
(4). The control system shifts the control curve
downwards and automatically reduces the energy input. To ensure sufficient supply
the pump set switches to a higher control curve when the minimum characteristic
curve is reached. The energy input is reduced (1) without any negative impact on the
supply of the building.
The pump set is operated in an optimised way, even if the system characteristic curve
is unknown; the noise at the thermostatic valves is reduced.
Application
▪
If the system characteristic curve is known (e.g. hydraulic balancing):
– Set the set value manually. Select a control curve that is minimally above the
characteristic curve. See type series booklet.
– Activating dynamic control in addition is recommended. Even if the setpoint
has been set to an optimum, excessive throttling of the thermostatic valves
may occur in certain climatic conditions. Dynamic control will further
optimise the operating point.
▪
If the system characteristic curve is unknown:
– Use the standard settings and activate dynamic control. The pump set
automatically recognises the system characteristic curve via the speed control
system and optimises the operating point accordingly.
Settings
The Dynamic Control function and its settings via the KSB ServiceTool are described
in the KSB ServiceTool supplementary operating manual.
4)
Characteristic curve at fully open thermostatic valves
