The Edwards 517T Series Photoelectric Smoke Alarms are designed for
multi-family, residential and institutional occupancies defined by NFPA 101, in
compliance with UL 217 and NFPA 72. Available in several different
configurations, the 517T series is engineered to virtually eliminate nuisance
alarms and deliver outstanding performance wherever reliable fire protection is
517T Series provides a three position test feature that simulates actual smoke
conditions. It also provides a maintenance indicator and makes the 100% testing
517T Series provides the temporal pattern evacuation tone as a standard feature.