Siemens FC330A manual Temporary isolation of a detector zone, What is a detector zone?

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

nsingle rooms

nadjacent rooms (no doors between the rooms)

ncorridors

nstaircases

Corridor

Zone 5

Room 101element 1,2,3

Zone 1

Room 104 Zone 4 element 1,2

Room 102
Zone 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:

nsmoke detectors, if smoke or dust is produced by unusual work

nheat detectors, if heat or steam is produced by unusual work

nmanual 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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Fire & Security Products	e1973c-4
Siemens Building Technologies Group	02.2004