draw a labelled diagram to show a fire alarm that uses the principal of expansion of heat
Answers
Answer:
Modern detection and signaling systems vary in complexity from those that are simple to those that incorporate advanced detection and signaling equipment. Such systems are typically designed and installed by qualified individuals as determined by the AHJ. The design, installation, and approval of a fire detection and alarm system may also require acceptance testing by regulatory agencies before new buildings are occupied or the system is placed in service. The design and installation of the fire detection and alarm system should conform to applicable provisions of NFPA® 70, National Electrical Code®, and NFPA® 72, National Fire Alarm and Signaling Code, and locally adopted codes and ordinances. Other standards also apply to the installation of these systems and are addressed later in this chapter within the discussions of the various types of systems. Each of the following sections highlights a basic component of a fire detection and alarm system.
Fire Alarm Control Units
The fire alarm control unit (FACU), formerly called the fire alarm control panel (FACP), contains the electronics that supervise and monitor the integrity of the wiring and components of the fire alarm system. The FACU basically serves as the brain for the alarm system . It receives signals from alarm-initiating devices, processes the signals, and produces output signals that activate audible and visual appliances. The FACU also transmits signals to an off-site monitoring station when provided. Power and fire alarm circuits are connected directly into this panel. In addition, the remote auxiliary fire control units and notification appliance panels are considered to be part of the fire alarm system and are connected and controlled.
Controls for the system are located in the FACU. The
FACU can also perform other functions, such as:
• Providing two-way firefighter communication
• Providing remote annunciator integration
• Controlling elevators, HVAC, fire doors, dampers, locks, or other fire protection features
The FACU can also provide public address messages and mass notifications alerts through prerecorded evacuation messages or independent voice
communications.
NOTE: Some fire alarm control units are designed for both security and
fire protection. In these types of systems, fire protection is engineered into
Explanation:
PLZ mark as brainliest
Hope Helps You ✌️
Please mark as the Brainliest ‼️
