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Fan Coil Actuator FCA 2
6.8.4 Hysteresis
To avoid unnecessary switching back and to between fan stages they are switched with a fixed
hysteresis of 10 %.
The next higher fan stage is assumed when the actuating value has reached the switch-on
threshold.
The next lower fan stage is only assumed if the actuating value has reduced by the value of the
hysteresis (see figure).
Example:
Switch-on threshold for fan stage 1 = 10 %
Switch-on threshold for fan stage 2 = 40 %
Switch-on threshold for fan stage 3 = 70 %
Hyst.
0%.
Figure 20
Updated: Feb-16 (subject to changes)
Hyst.
10%.
20%.
30%.
Hyst.
40%.
50%.
60%.
70%.
80%.
90%. 100%.
Actuating
value
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