Operating Modes Of The Detector Zones - Honeywell 8010 Bedienungs- Und Installationsanleitung

Extinguishing Control Computer 8010 - Series 2

17.2.2 Operating modes of the detector zones

With the operating modes of the detector zones, a distinction is made between >direct< alarming,
>alarm verification< (AVer), the >Two-zone- coincidence< (2ZD) and the >Two-detector-coincidence< (2DD).
Direct alarming
When an alarm in this zone is triggered, the output is triggered directly without a delay. In the case of manual
call points, direct alarming is absolutely essential.
Alarm verification (AVer)
With the aid of this operating mode, it is determined whether an alarm of this automatic detector zone should be
temporarily delayed before it is forwarded. The alarm verification delay can be selected for a period of 10 to 60
seconds.
Triggering of an detector zone with an alarm verification time does not directly result in an alarm on the panel.
The triggered zone is automatically reset. If this is not successful because, for example, the cause of the
triggering of an alarm in this zone has not been dealt with, the triggering of the zone results in an alarm after the
verification delay expires. However, if the triggered zone can be reset inside the delay time, no alarm occurs.
The alarm verification delay is used to prevent incorrect alarms.
In accordance to the VDE 0833-2 guideline an alarm verification delay must not
exceed 10 seconds!
Two-detector- coincidence (2DD)
With this operating mode, an alarm is only triggered if at least two detectors in the same zone report the status
Fire. The 2DD-mode is used for monitoring critical areas.
Triggering of an automatic fire alarm in an detector zone with the 2DD-mode does not directly result in the
alarm. Only triggering of a second automatic alarm in this zone results in an external alarm. If no second alarm
is triggered within approximately 30 seconds after the first alarm is triggered, "an internal alarm" occurs. In this
case, all alarm devices are activated, apart from the Fire department notifying system.
With automatic detector zones, activation of an extinguishing system may always only occur with a
2DD- coincidence or a 2ZD- coincidence.
Two-zone-coincidence (2ZD)
The triggering of an automatic detector zone with a 2ZD function does not directly result in the alarm. An
external alarm only occurs when an associated second automatic detector zone is triggered.
If no associated zone is triggered inside approximately 30 seconds after the first detector zone is triggered, the
result is "an internal alarm". This involves all alarm devices being activated, apart from the Fire department
notifying system. The 2ZD-function is used for monitoring critical areas.
The two-zone- coincidence (2ZD) can be programmed with 4 2ZD areas (A, B, C, D) and 4 different levels:
2ZD level
2ZD 1
2ZD 2
2ZD 3
2ZD 4
In the case of automatic detector zones, activation of an extinguishing system may only take place
with a 2ZD coincidence or a two-detector- coincidence (2DD).
90
st
1 triggered zone
Fire
Fire or fault
Fire
Fire or fault
Fire
nd
2 triggered zone
Fire
Fire
Fault
Fire
Fire or fault
FB 798352 / 11.07