For which type of damper is a supervisory signal reported and not a fire alarm?

A supervisory signal is an alert indicating a condition that requires attention but is not immediately threatening, which is the case for combination fire/smoke dampers. These dampers are designed to control smoke and fire, and their operation is crucial in ensuring both safety and proper airflow in an HVAC system.

When a combination fire/smoke damper is closed due to smoke detection, a supervisory signal is reported to notify that the damper is performing its intended function without triggering an emergency alarm. This allows monitoring of the damper's status while distinguishing between a routine operational signal and an urgent fire alarm. Fire dampers, smoke dampers, and ceiling radiation dampers usually activate fire alarms directly in the event of a fire situation, making them distinct from combination fire/smoke dampers in terms of how their signals are categorized and reported.