The document provides installation and setup instructions for the ADEMCO 5809 Rate-of-Rise Heat Detector wireless device used with ADEMCO alarm systems. The detector combines rate-of-rise and fixed temperature sensors to detect rapid temperature increases and temperatures over 135°F. It is powered by a 3V lithium battery and can be mounted on walls or ceilings. The detector's serial number must be programmed into the control panel. Its operation should be tested and battery replaced when low.