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VARIA 826 S KNX Multifunktionsdisplay mit Raumtemperaturregler
6.9.2 Positive Hysterese
Es wird solange geheizt, bis die Temperatur die Schwelle „Sollwert + Hysterese“ erreicht hat.
Danach wird die Heizung erst wieder eingeschaltet wenn die Temperatur unter den Sollwert
gesunken ist.
Beispiel Heizung:
Heizung mit Sollwert 20°C, Hysterese = 1°C und Umgebungstemperatur 19 °C.
Die Heizung ist eingeschaltet und schaltet erst beim Erreichten einer Temperatur von 21 °C
(= 20 °C + 1 °C) wieder aus.
Sobald die Temperatur unter 20 °C sinkt wird erneut eingeschaltet.
6.10 Totzone
Die Totzone ist ein Pufferbereich zwischen dem Heiz- und dem Kühlbetrieb.
Innerhalb dieser Totzone wird weder geheizt noch gekühlt.
Ohne diese Pufferzone würde die Anlage dauernd zwischen Heizen und Kühlen wechseln.
Sobald der Sollwert unterschritten wäre, würde die Heizung aktiviert und kaum der Sollwert
erreicht, würde sofort die Kühlung starten, die Temperatur wieder unter den Sollwert sinken
lassen und die Heizung wieder einschalten.
Je nach Art der Regelung kann sich die Totzone um den Wert der Hysterese erhöhen.
6.10.1 Fall 1: Heizen und Kühlen mit Stetigregelung
Sollwert Kühlen 24 °C
TOTZONE 4 K
Sollwert Heizen 20 °C
Die Totzone (4 K) wird nicht beeinflusst.
Stand: Sep-14 nderungen vorbehalten) Seite 153 von 182
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