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.