Lau’s no flow duct smoke detector is designed for use with Lau UL555S classified smoke dampers. The device detects the presence of smoke in the airstream of duct work in HVAC systems without a minimum operating velocity.
DSDN are factory mounted for “single point field power connection” to a standard Lau electronic fuse link (EFL) or optional FireStat (TS150).
The DSDN factory mounted with a smoke rated damper is intended to close the damper only. Consult Lau prior to ordering if DSDN is to be wired back to a UL listed fire alarm panel.
DSDN No Flow Duct Smoke Detectors Catalog