Automatic discharge activation is triggered by which devices?

Automatic discharge activation is triggered by which devices?

• A. Manual pull station
• B. Heat-detection devices or fusible links
• C. Smoke detectors
• D. Time-delay relay

Answer: (B)

Automatic discharge activation is triggered by heat-sensing devices or fusible links. In a kitchen hood suppression system, these heat-detection devices or the fusible links are placed in the canopy so that when cooking oil fires occur and temperatures rise to a preset level, the detector closes or the link melts, opening the discharge valve and releasing the extinguishing agent automatically. Manual pull stations are for manual activation, not automatic. Smoke detectors aren’t relied on to trigger this system because smoke from cooking can be present without a fire and isn’t a reliable indicator for automatic discharge. A time-delay relay is part of control logic to coordinate activation, not the primary trigger itself.

Automatic discharge activation is triggered by heat-sensing devices or fusible links. In a kitchen hood suppression system, these heat-detection devices or the fusible links are placed in the canopy so that when cooking oil fires occur and temperatures rise to a preset level, the detector closes or the link melts, opening the discharge valve and releasing the extinguishing agent automatically. Manual pull stations are for manual activation, not automatic. Smoke detectors aren’t relied on to trigger this system because smoke from cooking can be present without a fire and isn’t a reliable indicator for automatic discharge. A time-delay relay is part of control logic to coordinate activation, not the primary trigger itself.