Lesson 1Environmental and installation considerations: mounting heights, obstructions, false-alarm causes (dust, drafts, humidity, cooking, steam)Understand how environment and installation choices affect detector performance and false alarms. You will study mounting heights, spacing near obstructions, airflow and dust effects, humidity and steam issues, and methods to reduce nuisance activations in tropical conditions.
Mounting heights for common detectorsClearances from beams and obstructionsEffects of dust, insects, and contaminationDrafts, HVAC outlets, and air movementHumidity, steam, and cooking aerosolsLesson 2Notification and alarm signalling: sounders, strobes, voice evacuation systems, audibility/alerting criteriaUnderstand how fire alarm systems notify occupants and emergency services. This section covers sounders, strobes, voice evacuation systems, audibility and intelligibility criteria, temporal patterns, and code requirements for signalling performance in busy Nigerian environments.
Types of sounders and horn circuitsStrobes and visual notification rulesVoice evacuation system basicsAudibility and intelligibility criteriaTemporal patterns and coding formatsLesson 3Overview of system architecture: detectors, manual call points, control panels, sounders, interfacesGain an overview of commercial fire alarm system architecture and how each component works together. This section reviews detectors, manual call points, control and indicating equipment, notification appliances, power supplies, and interface modules for reliable use.
Role of the fire alarm control panelAutomatic detectors and field devicesManual call points and pull stationsNotification appliances and circuitsInterface and relay modules in systemsLesson 4Documentation and labelling: as-built drawings, device schedules, panel logs, zone maps, cable identification standardsUnderstand the documentation and labelling required for safe maintenance and code compliance. This section covers as-built drawings, device schedules, zone maps, cable identification, panel logs, and updating records after system modifications in local contexts.
As-built drawings and revisionsDevice schedules and address listsZone maps and annunciator layoutsCable tags and identification schemesPanel logs and maintenance recordsLesson 5Power supplies and supervision: primary power, mains failure transfer, standby batteries, battery testing and replacement criteriaLearn how commercial fire alarm systems are powered, supervised, and kept operational during mains failure. This section covers primary power sources, automatic transfer, battery sizing, testing methods, and replacement criteria for reliable performance amid power fluctuations.
Primary power sources and ratingsAutomatic mains failure transferBattery capacity and sizing rulesBattery testing methods and intervalsBattery replacement criteria and recordsLesson 6Detection zoning and area coverage: zoning concepts, detector spacing calculations, protected volumesLearn how buildings are divided into detection zones and how coverage is calculated. Topics include zoning objectives, life safety and property zones, detector spacing rules, ceiling height effects, and verifying protected volumes from plans in Nigerian structures.
Zoning objectives and legal limitsLife safety versus property zonesDetector spacing rules and tablesCeiling height and configuration effectsCalculating protected volumes from plansLesson 7Signal interfaces and integration: fire panels with building management systems, sprinkler interfaces, HVAC shutdown, emergency liftsLearn how fire alarm panels interface with other building systems to control hazards and support evacuation. Topics include sprinkler monitoring, HVAC shutdown, elevator recall, door release, and integration with building management systems for effective response.
Sprinkler flow and valve supervisionHVAC shutdown and smoke controlElevator recall and emergency liftsDoor release and access control linksIntegration with building managementLesson 8Types of detectors: ionisation, photoelectric, multi-criteria, aspirating, beam, heat and comparative usesStudy the main detector technologies used in commercial systems and when to apply each type. You will compare ionisation, photoelectric, multi-criteria, aspirating, beam, and heat detectors, focusing on response characteristics and application limits in humid climates.
Ionisation smoke detector behaviourPhotoelectric smoke detector usesMulti-criteria and intelligent detectorsAspirating and high sensitivity systemsBeam and heat detectors in large spacesLesson 9Wiring topologies and circuit supervision: conventional vs addressable loops, end-of-line devices, short/open fault detectionExplore wiring arrangements used in commercial fire alarm systems and how circuits are supervised. You will compare conventional and addressable topologies, learn end-of-line device functions, and study methods for detecting shorts and opens in installations.
Class B and Class A circuit conceptsConventional versus addressable loopsEnd-of-line resistors and devicesShort circuit and open fault detectionGround fault monitoring and response
