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3Störungssuche und -beseitigung
Serviceanleitung Logamax U112(K)/U114(K)/U122(K)/U124(K) • Ausgabe 12/2004 51
Änderungen aufgrund technischer Verbesserungen vorbehalten! W
3.1.13 Gebläse tauschen bei
Logamax U112/122 (20, 24 und 28 kW)
z Anlage vom Stromnetz trennen.
z Zwei Schrauben lösen.
z Kabelzuordnung notieren, alle Kabelstecker abzie-
hen.
z Gebläse entnehmen, durch neues ersetzen und mit
den zwei Schrauben befestigen.
z Kabelstecker aufstecken.
z Anlage ans Stromnetz schalten.
3.1.14 Differenzdruck messen bei
Logamax U112/122 (11, 20, 24 und 28 kW)
z Zwei Schrauben am Differenzdruckschalter (11 kW)
um etwa zwei Umdrehungen lösen und Differenz-
druckschalter herausnehmen (Abb. 59).
z Beide Schläuche abziehen (Schlauchzuordnung
notieren!) und mit einem Druckmessgerät verbinden.
z Netzschalter auf „I“ stellen.
z Differenzdruck messen.
z Netzschalter auf „0“ stellen.
z Schläuche vom Druckmessgerät abziehen.
Abb. 56 Bei Logamax U112/122 (20/24 /28kW):
Gebläse tauschen
Abb. 57 Bei Logamax U122 (11 kW): Differenzdruck messen
Abb. 58 Bei Logamax U112/122 (20/24/28kW):
Differenzdruck messen
Einschalt-
punkt
Ausschalt-
punkt
Logamax U122
(11 kW)
52 Pa 38 Pa
Logamax U112/122
(20 kW)
79 Pa 64 Pa
Logamax U122
(24 kW)
56 Pa 41 Pa
Logamax U122
(28 kW)
69 Pa 56 Pa
51


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