Siemens XC1001-A Działanie - Strona 13

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Building Technologies

Fire Safety

The XC10 extinguishing control unit is used for displaying, operating and

monitoring the functions of an extinguishing area and its immediate environs.

All detectors, alarm sounders, illuminated warning panel, monitoring devices and

controllers are connected to the extinguishing control unit. If a detector triggers an

alarm, it is transmitted to the extinguishing control unit. At the extinguishing control

unit the decision is made how the alarm is to be processed. The same applies to

faults. The processing of alarms and faults is different depending on the

configuration of the system.

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.

Automatic release

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

Extinguishing can be manually activated by using Manual Release button(s).

Alarm on Site

"Fire alarm" is signaled with alarm sounder(s). State "Activated" and "Released"

are signaled with alarm sounder(s) and illuminated warning panel(s).

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.

Emergency hold/abort

During the pre-warning 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.

Extinguishing system overview

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2012-06