Siemens XC1003-A Operation page 9

Building Technologies
Fire Safety & Security Products
Power supply
The extinguishing control unit is connected to the power mains at all times. In the
event of a mains power failure the extinguishing control unit is supplied by built-in
batteries. Battery operation in the event of a mains power failure is for a limited
time.
Fire detector
Several fire detectors are consolidated into a detector zone. Up to 32 fire detectors
can be connected to each detector zone. In the event of fire, the detector zone of
the alarming fire detector is indicated on the extinguishing control unit.
In the basic settings of the extinguishing control unit detector zones 1 and 2 serve
the automatic activation of extinguishing. The extinguishing control unit assesses
the zones in a so-called cross-zoning: in order to activate extinguishing, one fire
detector from each group must trigger an alarm. This principle ensures high
reliability so that extinguishing is not unjustified triggered.
Manual release button
Extinguishing can be manually activated by using a manual release button.
Alarm on site
"Fire alarm" is signaled with an alarm horn. State "Activated" and "Released" are
signaled with an alarm horn and an illuminated warning panel.
Remote transmission
Along with on-site alarm notification, activation of extinguishing and faults can be
transmitted via a remote transmission device to an external receiving station or
passed on to a fire detection system.
Fire protection installations
As a rule, before automatic extinguishing is triggered, building fire protection
installations must be set in the correct position. For example: door holding magnets
are de-energized, fire protection flaps are closed and fans and air-conditioning
systems are turned off.
Activation of extinguishing and monitoring
Valves on the extinguishing agent cylinders are triggered for activation of
extinguishing. The effected activation of extinguishing is reported to the control unit
via a pressure switch located at the cylinder bank. In addition, the weight or the
pressure of the extinguishing agent cylinders are constantly checked using cylinder
scales or manometers that trigger a contact if the value is too low.
Extinguishing blocking
During the activated time an activation of extinguishing already initiated can be
temporarily stopped by pressing the Emergency hold button or canceled by
pressing the Emergency abort button.
The automatic activation of extinguishing can be blocked as a precaution for
maintenance work. In this instance, in the event of fire, it is possible to press the
Manual release button for activation of extinguishing.
System overview
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A6V10099835_a_en
12.2007