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A6V10421795_en--_k
If no action is taken before the expiry of 'Time for delay alarm (Second)' and the
alarm event still exists during the confirmation time, AVC procedure is involved.
See Appendix A: Alarm Verification Concept (AVC) [➙ 129].
Fire incident check (Ta)
In case of a fire incident, alarm devices in the zone are activated. During the time
Ta, occupants of the affected zone could check and decide:
●
Is it a real fire (MAJOR INCIDENT)?
●
Is it a minor or false incident (MINOR INCIDENT or NO INCIDENT)?
If it is a minor or false incident, push the self-reset button during the time Ta. The
alarm devices in the affected zone are silent and the time Tb is activated for
occupants to ventilate the zone. Early fire elimination in the zone allows delayed or
unnecessary evacuation of the building.
NOTICE
Don't push the self-reset button if it is a real alarm event or major incident!
Instead, press the nearest MCP or inform operating personnel of pressing the
<Alarm delay off> button on the panel.
Alarm delay confirmation time (Tb)
In the event of a minor or no incident and after long and good room ventilation, the
detector normally goes to normal operation. In this case, the alarm deactivates
automatically. If a new alarm is detected (some smoke may remain in detector
chamber), the whole procedure proceeds again (max. three attempts) and ventilate
the zone again. If all attempts have proceeded but the alarm event still exists, AVC
procedure is involved. See Appendix A: Alarm Verification Concept (AVC) [➙ 129].
Appendix B: Delayed Alarm Reset (DAR)
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