Mechanical · L-9KXHV

Non-Supply Shaft Fire Smoke Damper Wiring Diagram

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Wiring and control sequence for a non-supply shaft fire smoke damper connected to a 120-volt single-phase power supply. The circuit includes a local disconnect switch, a spring-return damper actuator provided with the damper assembly, and an optional 24-volt coil relay with 120-rated contacts supplied by the mechanical contractor. Interlocks with local smoke detectors, fire life safety contractors, and air conditioning unit shutdown controls are wired to break on alarm and close the damper upon signal loss per code requirements.

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