User Manual

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Building Technologies Division CC1N7118en
19.05.2016
Flame supervision
Measuring circuits and length of the detector cables in accordance with Data Sheet
N7714.
Type of burner control
QRB... (typically)
Detector current
required during
operation
(with flame)
Permissible detector
current during the
prepurge time (dark
current)
(without flame)
Possible detector
current in operation
(with flame)
LOA24.171B27 / LOA24.171B17
Min. 70 µA Max. 5.5 µA Max. 210 µA
LOA25.173C27
LOA26.171B27
LOA28.173A27
LOA24.173A27 Min. 45 µA Max. 5.5 µA Max. 45 µA
LOA36.171A27 Min. 70 µA Max. 5.5 µA Max. 900 µA
Data given in the above table only apply under the following conditions:
- Mains voltage depending on version AC 110 V or AC 220...240 V
- Ambient temperature 23 °C
QRB...
12
11
LOA...
bl
µA DC
+
QRB...
7118v01/0102
sw
Legend
µA DC DC microammeter with an internal resistance of
Ri = max. 5 k
bl Blue
sw Black
br Brown
Detector current LED on Min. 60 µA ±15 %
Flame supervision with
QRB...
Measuring circuit for
detector current
measurement
Only with LOA36...
Indication of flame
strength