6.3.5
Door contact / blocking
Door contact switches for monitoring the door position (open/closed) of the pro-
tected cabinet are connected to the connection "Door contact". If the door contact
switch is actuated by opening the door, the extinguishing control of the whole
system blocks (including all systems "DET-AC III Slave"). Up to 10 door contact
switches can be connected per system. The lines between the door contact
switches and the system are monitored for breaks and short circuits.
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WARNING
Danger due to unwanted blocking!
The connection of door contact switches to connection "5" and at the same time to
connection "13" causes the system to be blocked even when the doors are closed.
● Connect door contact switches only to connection "5"
or
to connection "13".
5
13
Fig. 51: Connections door contact switch
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CAUTION
Unwanted release due to absent blocking!
If no door contact switches are used, the system is not blocked when the door is
opened. The system can however be released in the event of detection.
● If there are no door contact switches, inform all persons who are working on
the control cabinet of a possible release of the system if the door is open.
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CAUTION
Danger to life if system is not operational!
Fire messages from the fire detectors and the manual call point which occur during
the state
“Extinguishing system blocked”
(= blocking of the extinguishing system),
generate the state and the message
“Extinguishing system activated”
. In blocked
state, this does not however lead to extinguishing.
● Start up the system again as quickly as possible (e.g. close the door(s) and
keep them closed).
Assembly and installation
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US
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