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Event control
If a set temperature threshold (set value event) is exceeded at the activation sensor, the
event control starts, keeping the temperature at the control sensor constant (controller set
value).
If S3, as exemplified, reaches 60°C (activation threshold), the collector is to be held at a con
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stant temperature. The method of holding a temperature constant is the same with the ab
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solute value control.
Example:
Mode:
Off/Normal/Inverse
Activation sensor:
The sensor which activates the event control.
Control sensor:
Sensor that is to be held constant, if the event control activates.
Set value event:
Temperature threshold at the activation sensor. According to the example,
the event control will activate when 60°C is exceeded.
Controller set value:
Set value of the temperature at the control sensor after activation of
the event control.
Summary:
If the temperature at S3 exceeds 60°C, sensor S1 is held constant at 130°C.
The event control is prioritized above the speed results of other control methods. As such,
a set event can block the absolute value control and the differential control.
Example:
The collector temperature being held constant at 50°C by the absolute value con
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trol is being blocked (overwritten), if the cylinder (S3) has already reached a temperature of
60°C, generating a useful temperature of DHW is thus completed. Following this, charging is
to continue with full flow rate (= lower temperature and slightly better efficiency). For this, a
new desired temperature is to be entered in the event control which demands full speed au
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tomatically (e.g. controller set value at control sensor S1 = 10°C).
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