User Manual

Siemens Switzerland Ltd

Building Technologies Division

3.2.5. Kitchens

Figure 13 Kitchens

Large cooking vessels, frying pans and deep fryers, present a

very serious fire hazard in commercial kitchens. This is mainly

due to the strong possibility of fire breaking out due to

overheating and to the local high fire load.

Multi-sensor fire detector with a smoke/heat combination and

sophisticated signal processing are recommended for

monitoring these areas. Avoiding unwanted alarms due to the

inevitable presence of deceptive phenomena, such as fumes

or steam, requires in-depth knowledge and experience in

positioning the detectors in such applications.

More detailed information regarding fire detection in kitchens

is given in the document “Fire detection in kitchens”

3.2.6. Electrical plant rooms

Figure 14 Plant rooms

Electrical plant rooms, in which power supply equipment,

control systems, security systems and computer servers are

accommodated, are risk areas that need to be especially well

protected. This applies particularly to fire safety in these areas.

Aspirating smoke detection systems (ASD) are able to detect

even the smallest aerosol concentrations. They can detect

extremely low smoke concentrations which may be caused,

for example, by a malfunction of an electrical or electronic

component. It may then be possible to prevent fire developing

simply by removing the power from the particular unit.

Automated dry extinguishing systems (i.e. systems using inert

gases or clean agents) provide a best fit for the protection of

delicate and expensive electrical and electronic equipment

and prevent costly business interruptions.

Recently, isolated malfunctions of hard drives used for data

backup have been reported in server rooms, in connection

with the release of some gaseous fire extinguishing agents.

For such server room applications the Silent Nozzles mitigate

the sound pressure levels caused by the gas discharge process

and consequently prevent any damage to computer hard

drives (HDD).

More detailed information regarding fire protection in plant

rooms is given in the document “Fire protection in plant

rooms”.