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Ausdehnungsgefäß
21
Zünd- und Ionisationselektrode
22
Luftzuführung
3.3 Funktionsprinzip
3.3.1. Blockdiagramm
1
Wärmetauscher (Heizkreis)
2
Hydroblock
3
Plattenwärmetauscher (Warmwasserkreis) (Nur bei
Modellen mit Warmwassererwärmung)
4
Heizungsvorlauf
5
Warmwasseraustritt
6
Kaltwassereintritt
7
Rücklauf Heizkreis
8
Umschaltventil
9
Umwälzpumpe (Heizkreis)
10
Ausdehnungsgefäß
3.3.2. Umwälzpumpe
H
Manometrische Höhe des zentralen Heizkreises
Q
Durchflussmenge
Der Heizkessel ist mit einer elektronisch geregelten Umwälzpumpe
ausgestattet, die vom Schaltfeld in Abhängigkeit vom ΔT geregelt
wird.
Die Grafik zeigt die manometrischen Höhen bei verschiedenen
Drücken an. Mit den Parametern MIN.P.GESCHWIN und
MAX.P.GESCHWIN kann die Einstellung der Pumpe verändert
werden. Um die Geschwindigkeit der Pumpe zu ändern, den
Parameter MAX.P.GESCHWIN einstellen (Zuerst muss die
Heizungsanlage entlüftet werden). Wenn die Zirkulation in den
Heizkörpern zu gering ist oder wenn die Heizkörper nicht ganz warm
werden, den Mindestdruck der Pumpe mit dem Parameter
MIN.P.GESCHWIN erhöhen.
¼ Siehe Kapitel: "Einstellungen „Fachmann“", Seite 87.
T001868-B
1
2
3
10
9
8
4 5 6 7
T001901-B
0 200 400 600 800 1000 1200
0
100
200
300
400
500
700
H (mbar)
Q (l/h)
600
10 kW
15 kW
20 kW
25 kW
535
470
380
270
437 623 830 1037
3. Technische Beschreibung
MCA 15 - MCA 25 MCA 25/28 MI
12
26/10/2009 - 300020560-001-A
14


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