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Siemens Basisdokumentation RVP340, RVP350, RVP351 CE1P2545de
Building Technologies 14 Funktionsblock: Brauchwasser 15.03.2011
Die Ein- und Ausschalttemperatur für die Ladung mit Fühlern berechnet
sich wie folgt:
T
BWx
2524D02
ON
OFF
SD
BW
T
OFF
= T
BWw
T
ON
ON Brauchwasserladung EIN
OFF Brauchwasserladung AUS
SD
BW
Schaltdifferenz der Brauchwasserladung (Bedienzeile 128)
T
ON
Einschalttemperatur
T
OFF
Ausschalttemperatur
T
BWw
Brauchwassersollwert NORMAL oder REDUZIERT (Bedienzeile 26 oder 28)
T
BWx
Brauchwassertemperatur (Bedienzeile 27)
T
BWx1
Messwert Speicherfühler 1 (B31)
T
BWx2
Messwert Speicherfühler 2 (B32)
Bestimmung der Einschalttemperatur (Beginn der Brauchwasserladung):
BZ 126 Messung Schaltkriterium
0 1 Fühler T
BWx1
< (T
BWw
– SD
BW
)
1 2 Fühler T
BWx1
< (T
BWw
– SD
BW
) und T
BWx2
< (T
BWw
– SD
BW
)
2 1 Thermostat Thermostatkontakt B31 geschlossen
3 2 Thermostaten Thermostatkontakte B31 und B32 geschlossen
4 Solar mit 1 Fühler T
BWx1
< (T
BWw
– SD
BW
)
5 Solar mit 2 Fühler T
BWx1
< (T
BWw
– SD
BW
) und T
BWx2
< (T
BWw
– SD
BW
)
Bestimmung der Ausschalttemperatur (Ende der Brauchwasserladung):
BZ 126 Messung Schaltkriterium
0 1 Fühler T
BWx1
> T
BWw
1 2 Fühler T
BWx1
> T
BWw
und T
BWx2
> T
BWw
2 1 Thermostat Thermostatkontakt B31 geöffnet
3 2 Thermostaten Thermostatkontakte B31 und B32 geöffnet
4 Solar mit 1 Fühler T
BWx1
> T
BWw
5 Solar mit 2 Fühler T
BWx1
> T
BWw
und T
BWx2
> T
BWw
Aus den beiden Tabellen ist ersichtlich, dass es bei Verwendung von 2 Fühlern
oder Thermostaten keine Rolle spielt, welcher Fühler im Speicher oben und
welcher unten angeordnet ist.
Ist der Speicher für die Temperaturerfassung mit einem Thermostaten bestückt,
bestimmt der Thermostat die Einschalt- und die Ausschalttemperatur.
Hinweis
61


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