Structure and function
13
Building Technologies
A6V10099835_a_en
Fire Safety & Security Products 12.2007
4.2 Function
4.2.1 Access levels
The extinguishing control unit is protected by access levels against unauthorized
manipulation.
Access level 1: operation is possible at any time.
Access level 2: operation is possible only using an access code.
In Access level 1, as a rule, only the buzzer can be silenced in the event of an
alarm or a fault. All other commands can be accessed in Access level 2.
4.2.2 Typical extinguishing process
The following block diagram shows a normal extinguishing process in the basic
setting of the control unit and with an unblocked activation of extinguishing.
Reporting to fire detection system
Illuminated warning panel
Alarm horn
Remote transmission
Fire control
Fire
alarm
Actuator
Flooding
Time
Released
Slow Fast FastSlow
Hold or
abort
Continuous
Effect of
agent
Activated
Released
Fig. 3 Block diagram process
An automatic extinguishing is enabled after the control unit has run through two
alarm levels "Fire alarm" and "Activated".
If a detector detects a fire in the extinguishing area (zone 1 or 2), it triggers a "Fire
alarm". The alarm horn sounds slow pulsating. In the case of "Fire alarm" the alarm
horn can be silenced and the system reset. The fire detectors from zone 3 monitor
as a rule the areas adjacent to the extinguishing area. Zone 3 can also be unused.
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