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Siemens RDG100…, RDG110…, RDG140..., RDG160… Basisdokumentation CE1P3076.de
Building Technologies Funktionen 19 Jun 2009
4.7.8 2-stufiges Heizen oder Kühlen
Bei 2-stufigen Anwendungen steuert der Thermostat 2 Ventile oder Verdichter im
Heiz- oder Kühlbetrieb oder mit Umschaltung (automatisch oder manuell).
Werkeinstellung ist “nur Kühlen” (P01 = 1).
Im Heizbetrieb wird die erste Stufe aktiviert, wenn die erfasste Raumtemperatur
unter dem Sollwert liegt.
Die zweite Stufe wird aktiviert, wenn die erfasste Raumtemperatur unter “Sollwert”
minus “Sollwertdifferenz” sinkt.
Im Kühlbetrieb wird die erste Stufe aktiviert, wenn die erfasste Raumtemperatur
über dem Sollwert liegt.
Die zweite Stufe wird aktiviert, wenn die erfasste Raumtemperatur über “Sollwert”
plus “Sollwertdifferenz” steigt.
Folgende Diagramme zeigen die Steuersequenz für 2-Punkt-Regelung.
Heizbetrieb (P01 = 0) Kühlbetrieb (P01 = 1)
Y
TR [°C]
1
0
w
SDH
SDH
w
D
YHC2
YHC1
3181D15
Y
TR [°C]
SDCSDC
YHC1
YHC2
3181D16
w
w
D
1
0
Umschaltung (P01 = 2 oder P01 = 3)
T [°C] Raumtemperatur
w Raumtemperatur-Sollwert
YHC1 Steuerbefehl “Stufe 1”
YHC2 Steuerbefehl “Stufe 2”
SDH Schaltdifferenz “Heizen” (P30)
SDC Schaltdifferenz “Kühlen” (P31)
X
dz
Totzone (P33)
Y
TR [°C]
SDH
SDH
SDC
SDC
Changeover
YHC2
YHC1
YHC2
3181D17
w
w
D
w
D
1
0
w
D
Sollwertdifferenz (P34)
2-stufiges Heizen
oder Kühlen
Heizbetrieb
Kühlbetrieb
2-Punkt-Regelung
32


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