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8
Characteristic curve at fully open thermostatic valves
7 Operation
7.4.3 Dynamic control
4
3
2
1
Q [m
3
/h]
Fig. 29: Principle of dynamic control
1 Excess energy input
2 Dynamic Control
Function
The dynamic control (2) system detects when the selected control curve (3) is higher
than the minimum characteristic curve
curve downward, and power input is reduced automatically. 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 setpoint 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 variable
speed system and optimises the operating point accordingly.
Settings
The Setback Operation function and its settings are made via the KSB ServiceTool and
are described in the KSB ServiceTool supplementary operating manual (reference
number 1157.801).
Use of Dynamic Control with basic settings:
CalioTherm Pro
3 Control curve
4 Minimum characteristic curve
8)
(4). The control system shifts the control
63 of 76
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