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
N7716.
Type of burner control
QRC... (typically)
Detector current
required during
operation
(with flame)
Permissible detector
current during the
prepurge time (dark
current)
Possible detector
current in operation
(with flame)
LOA24.171B17 Min. 70 µA Max. 5,5 µA Max. 90 µA
LOA24.171B27 Min. 70 µA Max. 5,5 µA Max. 110 µA
LOA24.173A27 Min. 45 µA Max. 5,5 µA Max. 45 µA
LOA25.173C27 ¹) --- --- ---
LOA26.171B27 Min. 70 µA Max. 5,5 µA Max. 110 µA
LOA28.173A27 ¹) --- --- ---
LOA36.171A27 Min. 70 µA Max. 5,5 µA Max. 110 µA
¹) These types of LOA... must not be used in connection with QRC...blue-flame detectors
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
QRC...
12
11
LOA...
1
sw
bl
br
µA DC
+
QRC1...
7118v02/0102
Legend
µA DC DC microammeter with an internal resistance of
Ri = max. 5 k
bl Blue
sw Black
br Brown
The QRC1 has been designed specifically for blue-burning flames. Incidence of light is
from the front and side. The clamp is secured with a soft plastic plug. 3-core connection
(preamplifier integrated in the detector casing). For the different types of flame
detectors, engineering notes and technical data, refer to Data Sheet N7716.
Detector current LED on Min. 40 µA ±15 %
Flame supervision with
QRC...
Measuring circuit for
detector current
measurement
Only with LOA36...
Indication of flame
strength