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3Störungssuche und -beseitigung
Serviceanleitung Logamax U112(K)/U114(K)/U122(K)/U124(K) • Ausgabe 12/2004 73
Änderungen aufgrund technischer Verbesserungen vorbehalten! W
3.1.52 Brennerdruck kontrollieren
z Mindestens ein Heizkörperthermostatventil öffnen.
Der Umlaufwasserheizer darf noch nicht einge-
schaltet sein.
z Nur bei Logamax U112/U122:
Verschlussschraube des Messnippels (Abb. 102 bis
Abb. 105, Pos. 1) um etwa zwei Umdrehungen lösen
und Messschlauch des Druckmessgeräts auf den
Messnippel schieben.
z Verschlussschraube der Brennerdruckmessstelle
(Abb. 102 bis Abb. 105, Pos. 2) um etwa zwei
Umdrehungen lösen und zweiten Messschlauch des
Druckmessgeräts auf die Brennerdruckmessstelle
schieben.
z Abdeckung der 2. Bedienebene (Abb. 106, Pos. 1)
öffnen.
z Schornsteinfegerschalter (Abb. 106, Pos. 3) in Stel-
lung "1" stellen.
z Servicetaste (Abb. 106, Pos. 4) drücken und
ca. 10 Sek. gedrückt halten (Displayanzeige: "-/Y").
Abb. 102Brennerdruck kontrollieren (Logamax U122-11)
Abb. 103Brennerdruck kontrollieren
(Logamax U112 und U122-20/24/28)
Abb. 104Brennerdruck kontrollieren (Logamax U124-11)
12
10
01
11
KW
10
1
10
1
1
I
0
1
2
1
2
12
10
01
11
KW
10
1
10
1
1
I
0
1
73


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