The DAR function doesn't fulfill EN54-2. Check whether it is allowed in the country
code of practices before using this function.
Field application
The DAR function can be used in apartment blocks for tenant/owner reaction on a
false or minor incident by pressing a self-reset button and eliminating the root
cause (e.g., ventilating the space) in the flat without triggering the global alarm in
the first place and bothering neighbors especially at night.
Function overview
The DAR function serves the purpose of evacuating the affected zone only and
delaying the building evacuation depending on the zone delay input functionality.
By delaying the whole building's evacuation, it delays the alarm transmission as
well.
In the event of a fire alarm, alarm devices in the affected zone rather than in the
whole building are activated. If occupants know it is a false alarm or minor incident,
building evacuation could be delayed or avoided.
Fig. 28: Delayed alarm reset in manned mode in the period of T1
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