FIRE DETECTION TYPE 4 ALARM
Type 4 alarm equipment is mainly deployed in category E ERP (establishments receiving the public) and ERT (establishments receiving workers). This is the most rudimentary system, and only serves to broadcast the general alarm.
Fire safety systems ensure the safety of occupants in public buildings, high-rise buildings, industrial buildings and workplaces.
There are several I.S.S. categories, in decreasing order of risk severity: A, B, C, D and E (according to NF S61-931). Each category implies a different level of I.S.S. complexity, i.e. a specific fire detection and alarm system.
ERP are also classified into categories, ranging from 1 to 5, depending on the type of establishment and the number of people admitted.
According to the NF S61-936 standard, alarm equipment is divided into 5 types: type 1, 2a, 2b, 3 and type 4.
A building's fire safety is based on the match between these three factors: an ERP is categorized and assigned a risk level (and therefore an I.S.S. category), on the basis of which appropriate alarm equipment is installed.
What is a type 4 fire alarm?
Type 4 alarm equipment is mainly used in category E S.S.I for ERP (mainly 5th category) and ERT (the choice of alarm equipment is given to the operators, who prefer type 4).
What is a type 4 alarm?
Type 4 alarms must provide two functions: an audible alarm powerful enough to be heard by occupants anywhere in the building, and a manual release device. These two functions can be combined on a single piece of equipment, such as a stand-alone control unit that combines an audible alarm with a manual release device.
Which type 4 alarm to choose?
There are several Type 4 alarm systems, depending on the constraints of the facility and the restrictions on modifying the infrastructure. Eurofeu offers 5 type 4 models.
Type 4 wired mains alarm equipment
All components are interconnected by cables, and the control unit is powered by a 230V mains supply.
Type 4 wired control unit
Sound diffuser
Light diffuser (standard or waterproof)
Sound and light diffuser
Manual release
Battery-powered type 4 alarm equipment
All elements are powered by alkaline batteries.
Battery-powered handset, sound diffuser and type 4 DM
Control unit, sound diffuser, light diffuser and DM
Option: Wired manual release
Type 4 mains-operated radio alarm equipment
The mains-powered radio range enables wireless connection of all device components (DM, Central, DL). All components, with the exception of DM, are powered by a 230V mains supply. The devices include a transponder function as standard to extend the radio range (excluding DM) and cover all points in the building.
Central handset, type 4 sound diffuser
Control unit, sound diffuser, light diffuser and DM
Manual release
Radio sound diffuser
Radio light diffuser
Radio transponder
Battery-powered type 4 radio alarm equipment
The conventional radio range enables wireless connection of all device components (DM, Central, DL). Elements are powered by alkaline batteries. The devices include a transponder function as standard to extend the radio range (excluding DM).
Battery-powered handset, sound diffuser and type 4 DM
Control unit, sound diffuser, light diffuser and DM
Manual release
Radio sound diffuser
Radio light diffuser
Radio transponder
Battery-operated type 4 radio addressable alarm equipment
The addressable radio range enables wireless connection of all device elements (DM, Central, DL). If a DM is triggered, the 230V-powered central unit is notified, indicating the equipment and zone triggered. Devices include a transponder function as standard to increase radio range (excluding DM).
Addressable type 4 control unit
Battery-operated type 4 radio addressable sound and DM handset
Combined sound, light and battery-operated DM radio addressable
Radio addressable manual release
Radio addressable sound diffuser
Radio addressable luminous diffuser
Radio-optical addressable sensor with site base
Where to install type 4 alarms in ERP buildings?
Which ERPs are mainly equipped with type 4 alarms?
The following table shows the configurations covered by type 4 alarm equipment.
boutiques
up to 300 people
banks and offices
up to 300 people
up to 700 people
(
establishments receiving
workers)
Choice of EA given to the operator
Where is the equipment installed?
Manual releases are located in the immediate vicinity of emergency exits.
Sound diffusers must be audible at every point in the building, so they must be strategically placed to guarantee this function.
If a hearing-impaired person is alone at the time of a fire, it's a good idea to place a light diffuser in key places, such as the bathroom.
