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Duct Detectors

InnovairFlex™ D4S 4-Wire Photoelectric Sensor

The InnovairFlex™ Series are the only duct smoke detectors flexible enough to fit configurations from square to rectangular and everything in between.

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 airflow speeds of 100 to 4,000 feet per minute, temperatures of –4°F to 158°F, and a humidity range of 0 to 95 percent (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 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 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.

Features & Benefits:
  • 4-Wire Photoelectric, integrated low-flow technology
  • Air velocity rating from 100 ft/min to 4,000 ft/min (0.5 m/s to 20.32 m/sec)
  • Versatile mounting options: square or rectangular configuration
  • Plug-in sensor offers superb false alarm immunity and the latest sensor technology
  • Broad ranges for operating temperature (–4°F to 158°F) and humidity (0% to 95% non-condensing)
  • Rotary address switches
  • Patented sampling tube installs from front or back of the detector with no tools required
  • Increased wiring space with a newly added ¾-inch conduit knockout
  • One easy-access Test/Reset button and improved LED status
  • Patented interconnect feature for multi-fan shutdown
  • New high contrast terminal designations
  • Built-in short circuit protection from operator wiring errors
  • Field selectable settings for configuring the detector
  • Two DPDT Form-C relay contacts
  • 24 VAC/DC or 120 VAC
  • Backward compatibility with existing Innovair products, including remote accessories
Certifications:
  • UL S911
  • FM 3033744
  • CSFM 3242-1653:0207
Others
Name
Description
File Size
Date
Size
Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
application/pdf 228.38 KB
6/22/2022
228.38 KB
D4120 DataSheet HVDS005
application/pdf 589.61 KB
8/16/2022
589.61 KB
InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
application/pdf 397.75 KB
7/18/2022
397.75 KB
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
application/pdf 1.84 MB
8/10/2022
1.84 MB
HVAC Products Brochure
application/pdf 348.64 KB
4/29/2022
348.64 KB
D4S CAD Drawing
image/vnd.dwg 406.56 KB
8/9/2022
406.56 KB
HVAC Product Overview Brochure
application/pdf 536.86 KB
6/22/2022
536.86 KB
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
application/pdf 1.84 MB
2/17/2022
1.84 MB
Duct Smoke Detectors Applications Guide
application/pdf 898.78 KB
7/18/2022
898.78 KB
Brochure
Name
Description
File Size
Date
Size
Fire Safety Product Catalog
application/pdf 3.65 MB
6/16/2022
3.65 MB
Installation Instructions
Name
Description
File Size
Date
Size
D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
application/pdf 1.42 MB
3/13/2022
1.42 MB
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
application/pdf 1.55 MB
7/18/2022
1.55 MB
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
application/pdf 1.55 MB
7/18/2022
1.55 MB
Data Sheet
Name
Description
File Size
Date
Size
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
application/pdf 140.38 KB
8/16/2022
140.38 KB
Name
Description
File Size
Date
Size
Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
228.38 KB
6/22/2022
228.38 KB
D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
1.42 MB
3/13/2022
1.42 MB
D4120 DataSheet HVDS005
589.61 KB
8/16/2022
589.61 KB
InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
397.75 KB
7/18/2022
397.75 KB
Fire Safety Product Catalog
3.65 MB
6/16/2022
3.65 MB
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
1.84 MB
8/10/2022
1.84 MB
HVAC Products Brochure
348.64 KB
4/29/2022
348.64 KB
D4S CAD Drawing
406.56 KB
8/9/2022
406.56 KB
HVAC Product Overview Brochure
536.86 KB
6/22/2022
536.86 KB
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
1.84 MB
2/17/2022
1.84 MB
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
140.38 KB
8/16/2022
140.38 KB
Duct Smoke Detectors Applications Guide
898.78 KB
7/18/2022
898.78 KB
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
1.55 MB
7/18/2022
1.55 MB
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
1.55 MB
7/18/2022
1.55 MB
Name
Description
File Size
Date
Size
Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
228.38 KB
6/22/2022
D4120 DataSheet HVDS005
589.61 KB
8/16/2022
InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
397.75 KB
7/18/2022
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
1.84 MB
8/10/2022
HVAC Products Brochure
348.64 KB
4/29/2022
D4S CAD Drawing
406.56 KB
8/9/2022
HVAC Product Overview Brochure
536.86 KB
6/22/2022
D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
1.84 MB
2/17/2022
Duct Smoke Detectors Applications Guide
898.78 KB
7/18/2022
Fire Safety Product Catalog
3.65 MB
6/16/2022
D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
1.42 MB
3/13/2022
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
1.55 MB
7/18/2022
D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
1.55 MB
7/18/2022
InnovairFlex Conventional Duct Smoke Detectors Data Sheet
140.38 KB
8/16/2022
Image
SKU
Description
alt
D4S
Photoelectric Sensor, 4-Wire
Image
SKU
Description
alt
D4S
Photoelectric Sensor, 4-Wire