Automatic detection and automatic actuation shall be used. Which option states this actuation method?

• A. Automatic actuation without detection.
• B. Remote manual actuation.
• C. Manual-only actuation.
• D. Automatic detection and automatic actuation shall be used.

Answer: (C)

Automatic detection paired with automatic actuation means the system senses a fire and immediately releases the clean agent without human input. This approach ensures a fast, reliable response in protected spaces, reducing fire growth and protecting occupants and assets before anyone can react. Releasing the agent without any detection isn’t appropriate because it can waste agent or release when there isn’t a fire. Relying on remote manual or manual-only activation introduces delays and depends on a person recognizing the hazard and taking action, which increases risk. The method described—the combination of automatic detection and automatic actuation—best matches the intended automatic response for a fixed clean agent system.