Fire Alarm Computer 8000C / M
Page 9
Delay
Verify
Pre-Alarm
Fig. 6:Common display pre-alarm
In the Pre-alarm status, the master box (MB) is not activated to route the alarm to the assisting
bodies. A Pre-alarm is signalled when an intelligent fire detector reaches the pre-alarm level or
when in a programmed twin-loop/twin detector connection a loop or a detector have detected a fire
alarm. The controls programmed in the customer data for this situation such as relay outputs to
actuate alarm devices are activated.
The Pre-alarm is automatically reset if no further signals are transmitted. The common display Pre-
alarm is extinguished and any activated alarm devices are switched off. If further alarm signals
occur, a fire alarm is automatically initiated and the master box (MB) is activated.
PRE-ALARM
Red LED is permanently on
⇒
At least one detector or detector zone is signalling the pre-alarm
condition.
The activated detector or the activated detector zone is
indicated on the alphanumeric display.
Control actions assigned to this event by means of customer data programming, e.g. relay outputs
for activating internal signalling devices or evacuation signals will be executed.
☞
On pre-alarm, the master box for alarming the emergency services will not be activated.
Function of the display and operating elements
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