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Störungssuche und -beseitigung3
72 Serviceanleitung Logamax U112(K)/U114(K)/U122(K)/U124(K) • Ausgabe 12/2004
Änderungen aufgrund technischer Verbesserungen vorbehalten! W
3.1.50 Anschlüsse am ERC, RC oder
Ein-/Aus-Temperaturregler prüfen
z Kontaktverbindung zwischen Kabel und ERC, RC
oder Ein-/Aus-Temperaturregler prüfen.
z Am ERC oder RC sollte eine Gleichspannung von
ca. 11,5 V anliegen.
JHINWEIS!
Um die Fehlerquelle ein zu grenzen kann das
ERC oder RC vom Kessel abgeklemmt werden
(Brücke an 3 und 4, Abb. 101, Pos. 2 erforder-
lich) und an 1 und 2 (Abb. 101, Pos. 1) eine lei-
tende Brücke angeschlossen werden
(Abb. 101).
Eine Heizungs- und Warmwasseranforderung
erfolgt dann über die Potentiometereinstellung
des UBA.
3.1.51 Raumtemperaturregler tauschen
z Kabelzuordnung notieren. Alle Kabel lösen.
z Am neuen Raumtemperaturregler Kabel in der richti-
gen Zuordnung anklemmen.
z Entsprechende Einstellungen am Raumtemperatur-
regler vornehmen.
Abb. 101Anschlüsse des Regelgerätes am Kessel
prüfen.
Legende : Bezeichnung der Anschlüsse des Regelgerätes:
Pos. 1: Ein / Aus Temperaturregler
Pos. 2: mod. Raumtemperaturregler (digital) ERC / RC)
Pos. 3: I/O-Port / Kommunikationsanschluss
Pos. 4: Außentemperaturfühler
Pos. 5: Stromversorgung 24 VAC / max.6VA
(Klemmen 9-10)
3-Wege-Ventil (Klemmen 9-10-11)
1
2
3
4
5
72


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