Fire Alarm System – Module 3

Course Description

This module moves beyond basic installation into the engineering and design phase of Fire Alarm Systems. It focuses on creating technical documentation, performing critical system calculations (battery and voltage), designing complex network architectures, and selecting specialized detection technologies for high-risk environments.

2. Core Modules & Topics

• Design Documentation & Standards
  • Key Design Documents: Understanding essential drawings including Floor Plans (device layout), Riser Diagrams (vertical distribution), Schematic Diagrams (wiring details), and the Cause & Effect Matrix (system logic).
  • Standardized Symbols: Utilizing correct graphical symbols for components like smoke detectors, manual call points, and control modules to ensure industry-standard blueprints.
  • Design Workflow: A step-by-step process from initial Site Survey and Risk Assessment to System Selection and final Handover.
• System Architecture & Networking
  • Network Topologies: Comparing Class A (redundant loop return) vs. Class B (single path) wiring and Peer-to-Peer vs. Master-Slave panel networking.
  • System Capacity: Managing loop limitations (typically 126–250 devices per loop), cable length restrictions, and zoning requirements.
  • Building Integration: Interfacing FAS with critical building systems such as HVAC (damper control), Access Control (door release), and Elevators (grounding) using relay modules and BMS integration.
• Critical Engineering Calculations
  • Battery Sizing: Calculating the required battery capacity (Ah) to support Standby Loads (non-alarm state) and Alarm Loads (full activation) for specific durations.
  • Voltage Drop: Using formulas to ensure the voltage at the furthest device remains above the minimum operating threshold .
  • NAC Coverage: Designing notification circuits to meet audibility (dB) and visibility (candela) standards.
• Advanced Detection Applications
  • Specialized Detectors: Implementing Aspirating Smoke Detection (ASSD) for data centers and clean rooms , Linear Heat Detection (LHD) for tunnels and cable trays , and Beam Detectors for large open spaces like warehouses.
  • Industrial Solutions: Using Flame Detectors (UV/IR) for fuel storage areas and Video Image Smoke Detection (VISD) for challenging visual environments.

3. Key Learning Outcomes

• Create and interpret professional FAS design drawings like Riser Diagrams and Cause & Effect Matrices.
• Perform essential calculations for battery backup and voltage drop to ensure system reliability.
• Design integrated safety logic that automatically controls elevators, HVAC, and access doors during a fire event.
• Select the correct advanced detection technology (e.g., Aspirating vs. Beam) for complex environments.