System Sensor BS5839 Detector Application Guide, Fire System Categories, Category M Systems

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Guide

2. DETECTOR APPLICATION GUIDE

2.1. FIRE SYSTEM CATEGORIES.

Before a fire protection system can be designed, it is necessary to define the main objectives of the system. This is normally determined by a fire risk assessment, and should be provided as part of the fire system specification. BS5839 Part 1: 2002 defines three basic categories of fire detection system.

Application

2.1.1.Category M Systems

Category M systems rely on human intervention, and use only manually operated fire detection such as break glass call points. A category M system should only be employed if no one will be sleeping in the building, and if a fire is likely to be detected by people before any escape routes are affected. Any alarm signals given in a category M system must be sufficient to ensure that every person within the alarm area is warned of a fire condition.

2.1.2.Category L Systems

Category L systems are automatic fire detection systems intended to protect life. The category is further subdivided as follows:

Category L5: In a category L5 system certain areas within a building, defined by the fire system specification, are protected by automatic fire detection in order to reduce the risk to life. This category of system may also include manual fire protection.

 

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Example L5 System: L4 protection plus areas of high risk

Category L4: Designed to offer protection to the escape routes from a building. The system should comprise Category M plus smoke detectors in corridors and stairways

Category L3: Intended to offer early enough notification of a fire to allow evacuation before escape routes become smoke logged. Protection should be as for category L4 with the addition of smoke or heat detectors in rooms opening onto escape routes.

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Note: This document is based on the recommendations of BS5839 Part 1: 2002. It is intended only as a guide to the application of fire detection systems.

Reference must be made to relevant national and local standards.

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Contents Guide to intelligent fire systems Guide to Intelligent Fire Alarm Systems ContentsGuide to Intelligent Fire Alarm Systems Intelligent Fire Alarm SystemsIntelligent Fire Alarm Systems Decimal address switches System Fault ToleranceAddressing Methods Dedicated address programmerFire System Zones Intelligent Fire Alarm SystemsPRE-ALARM Facility Programming of Intelligent Fire Alarm Panels Remote LedsInterface Modules Advantages of Intelligent SystemsGuide Detector Application GuideFire System Categories Category M SystemsApplication Guide Manual Call Points 1. Manual Call Point PositioningSelection of Automatic Fire Detectors Fixed temperature detector 58C Rate of rise heat detectorAreas subject to rapid changes During normal useLocation and Spacing of Automatic Fire Detectors Ceiling HeightDetector type To EN54-7 10.5m Heat detector conforming toSloping Ceilings CorridorsCorridor being 7.5m and 5.3m respectively Voids and False Ceilings Lantern LightsLocation and Spacing of Optical Beam Detectors Audible Alarm Signals Visual Alarm SignalsMaintenance of Fire Detectors Codes and standards in the UK BS5839 Part 12002, SectionSeries 200 Plus Features General SpecificationsIntelligent Product Range Series 200 Plus Analogue Addressable Detector RangeWeight System Sensor Intelligent Product Range2251EM Photoelectric Smoke Sensor 2251TEM PHOTO-THERMAL SensorDrift Compensation and Smoothing 5251REM, 5251EM and 5251HTEM Heat SensorsRemote Test Switch 6500S Beam DetectorLaser Detector Operating Temperature -10C to 55CWeight 142g With LED blink enabled 2251EIS Intrinsically Safe Detector and IST200 InterfaceB500 Series Bases Weight 100g Interior diameterExterior diameter DepthM200 Series Module Range M200XE Short Circuit Isolator ModuleSpecifications Max Standby Current, externally powered zone M201E Output Module5A at 250VAC M210E-CZ Conventional Zone ModuleAccessories Call PointsIndoor Indoor products are generally rated at IP24DAudio Visual Products Detector Base SoundersSounder Strobes Majority of back box formatsOther Information Other Information Approval Bodies for Fire Detection ProductsAvenue Hoch Paris, France Tel +33 1 53 89 00 Jernholmen DK-2650 Hvidovre Denmark Tel +45 36 349System Sensor Fire Detectors Volochaevskaya Str 40, BldTelephone + 7 095 Telephone + 91 124 Fax + 7 095

BS5839 specifications

System Sensor BS5839 is a standard that pertains to fire detection and alarm systems, providing guidelines for the design, installation, and maintenance of these essential safety tools. It is crucial for safeguarding lives and property, ensuring that fire detection systems are effective and reliable. The BS5839 standard, established in the UK, covers a wide range of fire alarm system types, including conventional, addressable, and wireless systems.

One of the main features of BS5839 is its comprehensive classification of fire detection systems. The standard divides systems into categories based on the level of risk and the environment in which the system will operate. This classification helps ensure that the system installed meets the specific needs of the building and its occupants. For example, Category L systems are meant for life safety, while Category P systems are designed to protect property.

The technologies underpinning BS5839 include various types of detectors, alarm devices, and control panels. Smoke detectors, heat detectors, and multi-sensor detectors are prominent among the devices specified in the standard. Smoke detectors use photoelectric or ionization principles to detect smoke and signal an alarm, while heat detectors respond to temperature changes. Multi-sensor detectors combine both smoke and heat detection technologies to provide a more reliable response to fire conditions.

Another key characteristic of BS5839 is the emphasis on regular testing and maintenance. The standard outlines procedures to ensure that systems remain operational and effective over time. This includes routine system checks, functional testing, and more in-depth inspections at regular intervals. Ensuring that systems are maintained according to BS5839 is vital for compliance with insurance requirements and for safeguarding against potential legal liabilities.

Furthermore, BS5839 highlights the importance of staff training and awareness. It emphasizes that personnel responsible for fire safety must be adequately trained in the operation and response to fire alarm systems. This ensures that in the event of a fire, occupants are prompted to take appropriate action and evacuate safely.

In summary, System Sensor BS5839 provides a crucial framework for fire detection and alarm systems. Its classification of systems, incorporation of advanced technologies, and emphasis on maintenance all contribute to enhanced safety and compliance, protecting lives and property effectively.
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