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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 6 Basic unit 01.12.2009
6.2 Flame detectors
•
For display of the flame on the AZL2…, the following general conditions apply:
-
Display is subject to various component tolerances, which means that devia-
tions of
± 10% can occur
-
Note that, for physical reasons, there is no linear relationship between flame
display and detector signal values
The LMV37.4... system can be used with different types of flame detectors. For the cor-
rect use of the flame detectors, refer to Sequence diagrams.
The flame detector used must be correctly parameterized.
Caution!
Only ionization probes are suited for continuous operation!
In the hardware of the LMV37.4..., the flame signals are subdivided into 2 groups (group
0 covering types the QRB... and QRC…, and group 1 covering ionization and the
QRA…). The flame detector selection for gas is made via parameter 221, for oil via pa-
rameter 261.
No. Parameter
221
Gas: Active detector flame evaluation
0 = QRB… / QRC…
1 = ION / QRA…
261
Oil: Active detector flame evaluation
0 = QRB… / QRC…
1 = ION / QRA…
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