The alarm process activates and controls h2o move when a fire is detected, as well as the circulation switches ensure the sprinklers operate all over the full pipe community. The PAD200-DUCTR is developed and developed to satisfy all area specifications, in addition to the NFPA restrictions about duct smoke detectors. https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/