User Manual

Fire Safety

Building Technologies 049_Archives_and_Libraries_A6

V10271399_a_en.doc

Fire Safety & Security Products 03.2009

Fig. 11 Example of a fire detection system for archives and libraries

4.2.6 Extinguishing detection zones

The Siemens detection concept integrates both technologies, smoke detection with

Sinteso FDO241 and aspirating smoke detection integrated on the loop. However

as shown in figure Fig. 9, different detection concept could be implemented de-

pending on the asset value. More the asset has a unique and high value, early de-

tection with air sampling detection has to be implemented. The typical solution to

detect a fire in an archive room is to have a combination of aspirating smoke detec-

tion and point type fire detection. When the smoke is detected by the aspirating

smoke detection system, the room ventilation is switched off (depending on the

amount of air exchange) thereby allowing the smoke to reach the point type fire de-

tector for confirmation. When the fire is confirmed, the process to release the ex-

tinguishing agent is initiated.

Two extinguishing room monitoring concepts are possible with Siemens control

unit:

– Collective detection line

This solution is used when a stand-alone detection and extinguishing system is

required as shown in Fig. 12. Multi-protocol detectors FDOOT241-9, operated in

collective mode, are connected directly to the XC10.

– Addressable detection line

Fires in archive rooms are caused by short circuit or devices overload develop-

ing a smoldering fire. The best suitable point fire type detector is the FDO241.

This point type fire detector is connected to the FDnet loop. The FS20 panel re-

ceives the information of the FDO241 and forwards the pre-alarm and alarm sig-

nal to the XC10 panel via I/O module as shown in Fig. 13.