SD355, SD355T and AD355 Addressable Photoelectric Smoke Sensors. Installation and Maintenance Instructions. This sensor must be installed in compliance with INSTALLATION AND MAINTENANCE INSTRUCTIONS. I56-4081-000R One FireLite Place W-SD355 and W-SD355T Wireless Northford, CT 06472 base manual for details on making use of this capability. TESTING Fire-Lite recommends spacing sensors in compliance with NFPA 72. In low. User guide • Read online or download PDF • Fire-Lite AD355 Addressable Photoelectric SD355, SD355T and AD355 Addressable Photoelectric Smoke Sensors. instaLLation anD maintenance instructions sD355t and aD355 Photoelectric smoke sensors Voltage Range: Current: Alarm Current (LED on): Humidity Range: