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part one guide to design installation commissioning and maintenance of ?re systems in non domestic premises Consultant ? s Guide for Designing Fire Detection Alarm Systems for buildings part one guide to design installation commissioning and maintenance of ?re systems in non domestic premises part one guide to design installation commissioning and maintenance of ?re systems in non domestic premises contents About this manual Purpose Readership Electronic Format Acknowledgments Part One Guide to Design o f Fire Syst ems Introduction Planning the System The role of fire risk assessment and fire engineering Variations from BS - Type of system Servicing arrangements Planning flowchart Selecting the category of protection and coverage Category M ?? manual Category L ?? life Category L ?? life Category L ?? life Category L ?? life Category L ?? life Category P ?? property Category P ?? property Detector zones and alarm zones The meaning of a detection zone and alarm zone The purpose of detection zones guide to design of ?re systems part one part one guide to design installation commissioning and maintenance of ?re systems in non domestic premises contents Detection zone con ?guration guidelines Detection zone safeguards Which type of fire detection and alarm system Conventional systems Detection zones Detectors and call points Addressable systems Operation of addressable systems Detectors and call points Output devices Digital addressable systems Operation of analogue addressable detectors Detector pre ??alarm warning Detector alarm threshold compensation Detector condition monitoring Detector sensitivity setting Detector suitability General fire system engineering principles Detector selection for a particular area Smoke detectors Heat detectors Heat-enhanced Carbon monoxide fire detectors Flame detectors Optical beam detectors Aspirating detectors Duct probe unit Detector coverage Spacing under flat ceilings Spacing under pitched ceilings Spacing in corridors Stairways Lift shafts and other flue-like structures Obstructions part one guide to design of ?re systems part one guide to design installation commissioning and maintenance of ?re systems in non domestic premises contents Honeycomb ceilings Closely spaced structural beams and floor joists Ceiling heights Walls and partitions Voids Perforated ceilings Ventilation Lantern-lights Manual ??break glass ? call points General information Siting of manual call points Limitation of false alarms Role of the designer Categories of false alarm Requirements for service technicians False alarm ? rates ? Causes of false alarms Practical measures to limit false alarms Siting and selection of manual call points Selection and siting of automatic fire detectors Selection of system type Protection against electromagnetic interference Performance monitoring of newly commissioned systems Filtering measures System management Servicing and maintenance New non compliances Means of giving warning to occupants Sound pressure level Discrimination and frequency Sound continuity Audible alarms in noisy areas Alarm zones External fire alarm devices guide to design of ?re systems part one part one guide to design installation commissioning and maintenance of ?re systems in non domestic premises contents Voice alarm systems and voice sounders Fire alarm warnings for deaf people Control and indicating equipment Siting of control and indicating equipment Location of origin of the