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.
A plug-in sensor head offers improved false alarm immunity and simple installation, testing, and maintenance. The InnovairFlex housing provides ample wiring space, a 3/4 inch
conduit knockout, and built-in short circuit protection to prevent damage to sensitive components during installation. 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.
Three DIP switches can be used to configure field selectable settings: cover tamper delay, number of sensors to be controlled, and shut down on trouble option. The InnovairFlex duct smoke detector can be customized to meet local codes and specifications without additional wiring. The new
InnovairFlex product line is compatible with all previous Innovair models, including remote test accessories.

• 24 Vac/Vdc or 120 Vac operation
• Built-in reset button
• Remote test station option
• Remote sounder option
• Air velocity rating from 100-4000 fpm
• Two DPDT form-C relay contacts
• Temperature range: -4 to 158°F
• Patented sampling tube installs from front or back of the detector with no tools required
• Listed UL268A