e1973c-4
02.2004
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Fire & Security Products
Siemens Building Technologies Group
Temporary isolation of a detector zone
What is a detector zone?
The detectors and manual call points of the fire detection system are grouped into zones, which
are defined according to geographical aspects of the building. Zones may be all self-contained
areas of a building, for example
single rooms
adjacent rooms (no doors between the rooms)
corridors
staircases
Room 101
Zone 1
Room 102
Zone 2
Corridor
Zone 5
element 1,2,3
Room 104
Zone 4
element 1,2
2nd floor
In that way, a zone represents a “room address”. Each zone contains one or more automatic fire
detector devices or manual call points.
Assignment of zones to building areas
For each zone a descriptive user text (e. g. room designation and floor no.) is defined in the sy-
stem. Only in case of an alarm, this text is displayed on the text display together with the zone
and device number of the responding detector.
i
It is recommended to prepare a list holding the assignment of zone numbers to actual rooms
and building-areas.
When has a detector zone to be isolated?
In exceptional situations zones have to be isolated from the system, to prevent unintended
alarm. An exceptional situation depends on the kind of the detector and exists for zones with:
smoke detectors, if smoke or dust is produced by unusual work
heat detectors, if heat or steam is produced by unusual work
manual call points, if there is a possibility of inadvertent activation
WARNING
A zone that has been isolated cannot trigger any danger or fault messages! As soon as
conditions have returned to normal, isolated zones have immediately to be enabled again!
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