A zone on a fire alarm panel display is shown either with labeled lights (like "Basement", "1st Floor", "2nd Floor", "3rd Floor", Etc.) or with words on a graphic display.
- A zone is where you are going to send the fire department when there's a fire
- A zone is where you are going to send the building owners when there's a false alarm
- A zone is where you are going to send the fire alarm technician when the system needs fixing
If the fire alarm system is an addressable system that uses words on the display, all the devices are shown as separate devices, each device is actually its own zone.
Examples:
- Smoke 3rd Floor by 301
- Pull 2nd Floor by North Stair
- Sprinkler Waterflow Main
- Sprinkler Tamper Basement South Stair
- Duct Detector Roof Top HVAC
Remember, the fire alarm panel is only read by people during an emergency. Avoid acronyms like RTU (RTU stands for Roof Top Unit) and AFA (AFA stands for Automatic Fire Alarm - whatever that means for this installation). The people reading the display during an emergency, like a volunteer firefighter or building owner, are not trained in fire alarm abbreviations. These people are paying attention to what is going on and can't go looking up definitions.
If the system is conventional, zoning is determined by where the wires are going to be installed, and by the number of zones that the panel can show. If the panel is a 3 zone panel, that's your limitation; if the panel is a 5 zone panel, that's your limitation; if the panel is a 10 zone panel, that's your limitation.
The bottom line is that a Fire Zone isn't really determined by the fire alarm system; a Fire Zone is determined by the ability to fight fires, and by the ability to protect the occupants from fire and smoke.
Authority Having Jurisdiction
Because the AHJ (Authority Having Jurisdiction) is the person having final say over the fire alarm system, the AHJ should also be consulted. Most fire marshals and other AHJs are glad when they are asked ahead of time about things like this. Before talking to the fire marshal, just make sure you know what kind of fire alarm system you have (Addressable or Conventional) and if the panel is conventional, how big the panels is (how many input zones it has).
Douglas Krantz