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Building Technologies
9 System description
This part of the document includes information on the setup and functions of the
fire detection installation.
9.1 Overview
Acquisition ►► Evaluation ►► Alarming and control
Figure 14: Graphic representation of a fire detection system
↑ Automatic fire detector ↑ Global alarming (e.g., fire brigade)
Sounder ↑ Local alarming (e.g., horns)
Manual call point ↑ Fire control (e.g., doors)
Switching Service intervention
Remote transmission
Acquisition
Fire detectors detect fire phenomena, e.g., smoke, heat or carbon monoxide, and
transmit signals to the control panel in the form of different ↑ danger levels.
Evaluation of the ↑ danger levels
The control panel evaluates the danger levels and decides whether to trigger
alarms or not. In doing so, the control panel distinguishes between automatic and
manual fire alarms, 'Pre-ALARM' and 'Degraded FIRE ALARM'.
Alarm events are allocated to the following event categories:
Event category for alarm
events
Typical example Activation/cause
'Pre-ALARM'
The detector detects a fire phenomenon with a low
↑ danger level
Detector sensor
'ALARM'
The detector detects a fire phenomenon with a high
danger level
Detector sensor
Table 6: Event categories for alarm events
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