What sprinkler alarm system is FH circuit?

What sprinkler alarm system is FH circuit?

• A. High temperature alarm
• B. Flooding alarm
• C. Sprinkler alarm
• D. Smoke alarm

Answer: (D)

The unit of fire detection tied to a sprinkler system’s alarm is the smoke alarm function. The FH circuit is the fire alarm circuit that carries signals from smoke detectors in the area to alert personnel and trigger fire control actions. This is distinct from a high temperature alarm (which would respond to heat near sprinkler heads), a flooding alarm (which detects water ingress or leaks), or a sprinkler alarm that is specifically about water flow in the piping. Smoke detection provides early warning of a fire before water is released, which is why the FH circuit corresponds to the smoke alarm.

The unit of fire detection tied to a sprinkler system’s alarm is the smoke alarm function. The FH circuit is the fire alarm circuit that carries signals from smoke detectors in the area to alert personnel and trigger fire control actions. This is distinct from a high temperature alarm (which would respond to heat near sprinkler heads), a flooding alarm (which detects water ingress or leaks), or a sprinkler alarm that is specifically about water flow in the piping. Smoke detection provides early warning of a fire before water is released, which is why the FH circuit corresponds to the smoke alarm.