PRODUCT DESCRIPTION
The DSD Series, 4-wire photoelectric duct smoke
detector features a pivoting housing that fits both
square and rectangular footprints and mounts
to round or rectangular ductwork. This unit
senses smoke in the most challenging conditions,
operating in airflow speeds of 100 to 4,000 feet
per minute, temperatures of –20°C to 70°C (–4°F to
158°F), and a humidity range of 0 to 95% (noncondensing).
A plug-in sensor head offers improved
false alarm immunity and simple installation,
testing, and maintenance. An improved cover
design isolates the sensor head from the low-flow
feature for simple maintenance.
The DSD housing provides ample wiring space,
a ¾-inch conduit knockout, and built-in short
circuit protection to prevent damage to sensitive
components during installation. High contrast
terminal designations make wiring easy. With its
2:1 sensor-to-power capability, the power board of
the DSD may be used to monitor a second sensor,
D4S, simultaneously (i.e., supply and return side).
As many as 50 detectors can be interconnected.
When one unit senses smoke, all interconnected
detectors will switch their relays; only the detector
sensing smoke will go into alarm, thus pinpointing
the fire source.
All detectors must be used with a metal sampling
tube, DST series.