The operational sequence following a fire event in a double-interlock pre-action sprinkler system is designed to prevent accidental water discharge while ensuring rapid fire suppression when needed. First, a fire detection event must occur. This is typically initiated by a separate fire detection system, such as smoke or heat detectors, within the protected area. This detection system is electrically interlocked with the pre-action valve. Second, the fire detection system must activate, sending a signal to the ....
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