The system consists of cylinders containing the gas agent, distributed pipe-work, and discharge nozzles. The nozzles are located to provide optimum coverage in the application of extinguishant in the voids and room space. Detection is provided by a point detection system and supplemented by an incipient fire detection system. The incipient fire detection system provides the earliest warning of the fire by detecting the smallest particles emitted when cable or equipment components overheat. This permits immediate action to locate the seat of the fire incipient and permit local power shutdown or use of portable extinguishers.
Should a fire grow very rapidly the point detection system will detect the fire. In accordance with the standards BS 6266, and to prevent unwanted discharge, the control panel will require two independent detection signals before extinguishing release is activated.
Upon receiving these signals the control panel will sound alarms and time-out to initiate a gas discharge. Dependent on the extinguishing agent applied, pressure relief and/or extraction units may be required.
The protected risk must also be sealed to provide maximum integrity to retain the extinguishing design concentration for at least 10 minutes post-discharge. This can be checked through the use of a room integrity or fan test.
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