What is the purpose of a manually activated pull station in SHS?

• A. Provides a means for automatic agent release without human input.
• B. Provides a means for occupants or building staff to initiate a controlled release of extinguishing agent when a fire is detected or suspected.
• C. Tests the integrity of the detecting network.
• D. Activates a local alarm only.

Answer: (B)

Manually activated pull stations in SHS are the human-initiated control that starts the discharge of the extinguishing agent. This provides a deliberate way for occupants or trained staff to release the agent when there is a fire or a strong suspicion of one, ensuring a prompt yet controlled response. The act of pulling these stations typically signals the suppression system and activates the building’s alarms, coordinating evacuation and response while delivering the agent to protect sensitive equipment or vulnerable areas. It emphasizes intentional action by people on site rather than relying solely on automatic detectors, and it is not intended to be used for testing or to trigger only a local bell without initiating suppression.