Connection Of The Detector Heating Unit - Siemens OH720 Technical Manual

5.12.2 Connection of the detector heating unit

Building Technologies
Fire Safety
● Connect the cables for the monitored supply from the control panel and the
detector heating unit to the supplied micro terminals DBZ1190-AA.
● The cables can be placed in the same cable harness as the detector line or
separately.
● Several detector heating units can be connected in parallel.
● Detector heating units require a separate supply.
NOTICE
Risk of icing
Malfunction
● To ensure smooth operation, the detector must be checked regularly for icing.
DB721
DB110xx
1a 1b
5 6
-
1
+
+
2
-
Figure 14: Connection diagram for detector heating unit FDBH291
1 Control panel supply (monitored)
36BDetector heating unit FDBH291
DBZ1190-AA
-
+
FDBH291
LINE
2 Control panel
4BMounting / Installation
DB721
DB110xx
1a 1b
+
DBZ1190-AA
5 6
-
FDBH291
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5
+
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