Photoelectric Smoke Detector, 24 VDC, 24 to 120 VAC

Description

The InnovairFlex™ D4120 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 air-flow speeds of 100 to 4000 FPM, temperatures of -4° to +158°F and a humidity range of 0 to 95% (non-condensing). 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 InnovairFlex™ housing provides ample wiring space, a 3/4 in. 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 D4120 may be used to monitor a second sensor, D4S, simultaneously (i.e., supply and return side). As many as 50 InnovairFlex™ 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.