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    Duct Detectors

    InnovairFlex™ 4-Wire Duct Smoke Detector

    InnovairFlex™ 4-wire photoelectric duct smoke detectors offer 2 sensors to 1 powerboard capability in standard (D4120) and watertight (D4120W) versions.

    Overview

    InnovairFlex™ D4120 4-wire photoelectric duct smoke detectors feature 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 ft/min, temperatures of –4 °F 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 D4120W watertight 4-wire photoelectric duct smoke detector is UL listed as a watertight enclosure providing protection against falling dirt, rain, windblown dust, splashing and hose directed water.

    Features & Benefits:
    • Patented sampling tube installs from front or back of the detector with no tools required
    • Increased wiring space with a newly added 3/4 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
    • 24V AC/DC or 120V AC
    • Backward compatibility with existing Innovair products, including remote accessories
    Certifications:
    • UL/ULC
    • FM
    • CSFM
    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
    TRADE PRODUCT LIST Catalog
    application/pdf 4.15 MB
    1/23/2024
    4.15 MB
    Leaders in Life- Safety- Technology Catalogs
    application/pdf 9.8 MB
    1/8/2024
    9.8 MB
    D4120 BIM File
    application/x-tika-msoffice 1.31 MB
    7/24/2023
    1.31 MB
    D4120W BIM File
    application/x-tika-msoffice 740 KB
    7/24/2023
    740 KB
    InnovairFlex Duct Smoke Detector
    application/pdf 51.38 KB
    5/14/2023
    51.38 KB
    D4120W Duct Smoke Detector
    application/pdf 1.84 MB
    5/8/2023
    1.84 MB
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
    application/pdf 1.84 MB
    5/8/2023
    1.84 MB
    Duct Smoke Detectors Applications Guide
    application/pdf 898.78 KB
    8/17/2023
    898.78 KB
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
    application/pdf 1.84 MB
    5/11/2023
    1.84 MB
    Photoelectric vs. Ionization Technology Brochure
    application/pdf 315.28 KB
    5/11/2023
    315.28 KB
    Duct Detector Testing and Maintenance
    application/pdf 186.4 KB
    5/11/2023
    186.4 KB
    Watertight Duct Smoke Detector Datasheet
    application/pdf 529.2 KB
    3/9/2023
    529.2 KB
    InnovairFlex Duct Smoke Detector Engineering Specs
    application/pdf 51.33 KB
    5/14/2023
    51.33 KB
    D4120 and D4120W CAD Drawing
    application/zip 2.34 MB
    4/28/2023
    2.34 MB
    InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
    application/pdf 397.75 KB
    5/11/2023
    397.75 KB
    Wiring Diagram for D4120 to SSK451 with PS24LOW
    application/pdf 227.69 KB
    7/18/2022
    227.69 KB
    D4120W Duct Smoke Detector Manual
    application/pdf 1.84 MB
    5/11/2023
    1.84 MB
    InnovairFlex: Push Button Testing Brochure
    application/pdf 390.08 KB
    5/11/2023
    390.08 KB
    D4120 and D4120W CAD Drawing
    application/zip 2.34 MB
    4/28/2023
    2.34 MB
    Photoelectric vs. Ionization Technology
    application/pdf 315.28 KB
    5/11/2023
    315.28 KB
    Duct Detector Testing and Maintenance Brochure
    application/pdf 186.4 KB
    5/11/2023
    186.4 KB
    InnovairFlex LED Function Set Incorrectly
    application/pdf 36.45 KB
    7/18/2022
    36.45 KB
    Duct Detector Evolution
    application/pdf 46.7 KB
    5/17/2023
    46.7 KB
    HVAC Product Overview Brochure
    application/pdf 536.86 KB
    5/11/2023
    536.86 KB
    HVAC Product Overview
    application/pdf 536.86 KB
    5/11/2023
    536.86 KB
    InnovairFlex Duct Smoke Detectors
    application/pdf 321.99 KB
    5/17/2023
    321.99 KB
    Duct Smoke Detector
    application/pdf 589.61 KB
    5/14/2023
    589.61 KB
    HVAC Products
    application/pdf 348.64 KB
    5/19/2023
    348.64 KB
    InnovairFlex Reset Enhancement
    application/pdf 38.63 KB
    7/18/2022
    38.63 KB
    InnovairFlex Duct Smoke Detectors FAQ
    application/pdf 321.99 KB
    5/17/2023
    321.99 KB
    Watertight Duct Smoke Detector
    application/pdf 529.2 KB
    5/14/2023
    529.2 KB
    HVAC Products Brochure
    application/pdf 348.64 KB
    5/11/2023
    348.64 KB
    InnovairFlex Duct Smoke Detector Engineering Specs
    application/pdf 51.38 KB
    5/14/2023
    51.38 KB
    Duct Detector Evolution Tech Bulletin
    application/pdf 46.7 KB
    6/22/2023
    46.7 KB
    Duct Smoke Detector Datasheet
    application/pdf 589.61 KB
    5/14/2023
    589.61 KB
    Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
    application/pdf 227.69 KB
    7/15/2022
    227.69 KB
    InnovairFlex Reset Enhancement Tech Bulletin
    application/pdf 38.63 KB
    7/15/2022
    38.63 KB
    DUCTSD & D4120 Cross Reference Guide
    application/pdf 281.79 KB
    5/11/2023
    281.79 KB
    DUCTSD & D4120 Cross Reference
    application/pdf 281.79 KB
    5/11/2023
    281.79 KB
    InnovairFlex Duct Smoke Detector
    application/pdf 51.33 KB
    5/14/2023
    51.33 KB
    Brochure
    Name
    Description
    File Size
    Date
    Size
    Fire Safety Product Catalog
    application/pdf 3.65 MB
    5/11/2023
    3.65 MB
    Installation Instructions
    Name
    Description
    File Size
    Date
    Size
    D4120W Duct Smoke Detector Installation Document
    application/pdf 1.55 MB
    5/8/2023
    1.55 MB
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    application/pdf 1.55 MB
    5/8/2023
    1.55 MB
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    application/pdf 1.55 MB
    5/8/2023
    1.55 MB
    D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
    application/pdf 1.42 MB
    3/13/2022
    1.42 MB
    Data Sheet
    Name
    Description
    File Size
    Date
    Size
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    application/pdf 85.17 KB
    5/14/2023
    85.17 KB
    InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
    application/pdf 169.92 KB
    5/14/2023
    169.92 KB
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    application/pdf 140.38 KB
    5/17/2023
    140.38 KB
    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
    TRADE PRODUCT LIST Catalog
    application/pdf 4.15 MB
    1/23/2024
    4.15 MB
    Leaders in Life- Safety- Technology Catalogs
    application/pdf 9.8 MB
    1/8/2024
    9.8 MB
    D4120 BIM File
    application/x-tika-msoffice 1.31 MB
    7/24/2023
    1.31 MB
    D4120W BIM File
    application/x-tika-msoffice 740 KB
    7/24/2023
    740 KB
    InnovairFlex Duct Smoke Detector
    application/pdf 51.38 KB
    5/14/2023
    51.38 KB
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    application/pdf 85.17 KB
    5/14/2023
    85.17 KB
    D4120W Duct Smoke Detector
    application/pdf 1.84 MB
    5/8/2023
    1.84 MB
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
    application/pdf 1.84 MB
    5/8/2023
    1.84 MB
    Duct Smoke Detectors Applications Guide
    application/pdf 898.78 KB
    8/17/2023
    898.78 KB
    InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
    application/pdf 169.92 KB
    5/14/2023
    169.92 KB
    D4120W Duct Smoke Detector Installation Document
    application/pdf 1.55 MB
    5/8/2023
    1.55 MB
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    application/pdf 140.38 KB
    5/17/2023
    140.38 KB
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    application/pdf 1.55 MB
    5/8/2023
    1.55 MB
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    application/pdf 1.55 MB
    5/8/2023
    1.55 MB
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
    application/pdf 1.84 MB
    5/11/2023
    1.84 MB
    Photoelectric vs. Ionization Technology Brochure
    application/pdf 315.28 KB
    5/11/2023
    315.28 KB
    Duct Detector Testing and Maintenance
    application/pdf 186.4 KB
    5/11/2023
    186.4 KB
    Watertight Duct Smoke Detector Datasheet
    application/pdf 529.2 KB
    3/9/2023
    529.2 KB
    InnovairFlex Duct Smoke Detector Engineering Specs
    application/pdf 51.33 KB
    5/14/2023
    51.33 KB
    D4120 and D4120W CAD Drawing
    application/zip 2.34 MB
    4/28/2023
    2.34 MB
    InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
    application/pdf 397.75 KB
    5/11/2023
    397.75 KB
    Wiring Diagram for D4120 to SSK451 with PS24LOW
    application/pdf 227.69 KB
    7/18/2022
    227.69 KB
    Fire Safety Product Catalog
    application/pdf 3.65 MB
    5/11/2023
    3.65 MB
    D4120W Duct Smoke Detector Manual
    application/pdf 1.84 MB
    5/11/2023
    1.84 MB
    InnovairFlex: Push Button Testing Brochure
    application/pdf 390.08 KB
    5/11/2023
    390.08 KB
    D4120 and D4120W CAD Drawing
    application/zip 2.34 MB
    4/28/2023
    2.34 MB
    Photoelectric vs. Ionization Technology
    application/pdf 315.28 KB
    5/11/2023
    315.28 KB
    Duct Detector Testing and Maintenance Brochure
    application/pdf 186.4 KB
    5/11/2023
    186.4 KB
    InnovairFlex LED Function Set Incorrectly
    application/pdf 36.45 KB
    7/18/2022
    36.45 KB
    Duct Detector Evolution
    application/pdf 46.7 KB
    5/17/2023
    46.7 KB
    HVAC Product Overview Brochure
    application/pdf 536.86 KB
    5/11/2023
    536.86 KB
    HVAC Product Overview
    application/pdf 536.86 KB
    5/11/2023
    536.86 KB
    InnovairFlex Duct Smoke Detectors
    application/pdf 321.99 KB
    5/17/2023
    321.99 KB
    Duct Smoke Detector
    application/pdf 589.61 KB
    5/14/2023
    589.61 KB
    HVAC Products
    application/pdf 348.64 KB
    5/19/2023
    348.64 KB
    InnovairFlex Reset Enhancement
    application/pdf 38.63 KB
    7/18/2022
    38.63 KB
    InnovairFlex Duct Smoke Detectors FAQ
    application/pdf 321.99 KB
    5/17/2023
    321.99 KB
    Watertight Duct Smoke Detector
    application/pdf 529.2 KB
    5/14/2023
    529.2 KB
    HVAC Products Brochure
    application/pdf 348.64 KB
    5/11/2023
    348.64 KB
    InnovairFlex Duct Smoke Detector Engineering Specs
    application/pdf 51.38 KB
    5/14/2023
    51.38 KB
    Duct Detector Evolution Tech Bulletin
    application/pdf 46.7 KB
    6/22/2023
    46.7 KB
    Duct Smoke Detector Datasheet
    application/pdf 589.61 KB
    5/14/2023
    589.61 KB
    D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
    application/pdf 1.42 MB
    3/13/2022
    1.42 MB
    Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
    application/pdf 227.69 KB
    7/15/2022
    227.69 KB
    InnovairFlex Reset Enhancement Tech Bulletin
    application/pdf 38.63 KB
    7/15/2022
    38.63 KB
    DUCTSD & D4120 Cross Reference Guide
    application/pdf 281.79 KB
    5/11/2023
    281.79 KB
    DUCTSD & D4120 Cross Reference
    application/pdf 281.79 KB
    5/11/2023
    281.79 KB
    InnovairFlex Duct Smoke Detector
    application/pdf 51.33 KB
    5/14/2023
    51.33 KB
    Name
    Description
    File Size
    Date
    Size
    Drywall Dust Problems with Duct Smoke Detectors Tech Bulletin
    228.38 KB
    6/22/2022
    TRADE PRODUCT LIST Catalog
    4.15 MB
    1/23/2024
    Leaders in Life- Safety- Technology Catalogs
    9.8 MB
    1/8/2024
    D4120 BIM File
    1.31 MB
    7/24/2023
    D4120W BIM File
    740 KB
    7/24/2023
    InnovairFlex Duct Smoke Detector
    51.38 KB
    5/14/2023
    D4120W Duct Smoke Detector
    1.84 MB
    5/8/2023
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component
    1.84 MB
    5/8/2023
    Duct Smoke Detectors Applications Guide
    898.78 KB
    8/17/2023
    D4120 Duct Smoke Detector, D4P120 Power Board Component and D4S Sensor Component Manual
    1.84 MB
    5/11/2023
    Photoelectric vs. Ionization Technology Brochure
    315.28 KB
    5/11/2023
    Duct Detector Testing and Maintenance
    186.4 KB
    5/11/2023
    Watertight Duct Smoke Detector Datasheet
    529.2 KB
    3/9/2023
    InnovairFlex Duct Smoke Detector Engineering Specs
    51.33 KB
    5/14/2023
    D4120 and D4120W CAD Drawing
    2.34 MB
    4/28/2023
    InnovairFlex: 2 Sensor to 1 Power Board Capability Brochure
    397.75 KB
    5/11/2023
    Wiring Diagram for D4120 to SSK451 with PS24LOW
    227.69 KB
    7/18/2022
    D4120W Duct Smoke Detector Manual
    1.84 MB
    5/11/2023
    InnovairFlex: Push Button Testing Brochure
    390.08 KB
    5/11/2023
    D4120 and D4120W CAD Drawing
    2.34 MB
    4/28/2023
    Photoelectric vs. Ionization Technology
    315.28 KB
    5/11/2023
    Duct Detector Testing and Maintenance Brochure
    186.4 KB
    5/11/2023
    InnovairFlex LED Function Set Incorrectly
    36.45 KB
    7/18/2022
    Duct Detector Evolution
    46.7 KB
    5/17/2023
    HVAC Product Overview Brochure
    536.86 KB
    5/11/2023
    HVAC Product Overview
    536.86 KB
    5/11/2023
    InnovairFlex Duct Smoke Detectors
    321.99 KB
    5/17/2023
    Duct Smoke Detector
    589.61 KB
    5/14/2023
    HVAC Products
    348.64 KB
    5/19/2023
    InnovairFlex Reset Enhancement
    38.63 KB
    7/18/2022
    InnovairFlex Duct Smoke Detectors FAQ
    321.99 KB
    5/17/2023
    Watertight Duct Smoke Detector
    529.2 KB
    5/14/2023
    HVAC Products Brochure
    348.64 KB
    5/11/2023
    InnovairFlex Duct Smoke Detector Engineering Specs
    51.38 KB
    5/14/2023
    Duct Detector Evolution Tech Bulletin
    46.7 KB
    6/22/2023
    Duct Smoke Detector Datasheet
    589.61 KB
    5/14/2023
    Wiring Diagram for D4120 to SSK451 with PS24LOW Tech Bulletin
    227.69 KB
    7/15/2022
    InnovairFlex Reset Enhancement Tech Bulletin
    38.63 KB
    7/15/2022
    DUCTSD & D4120 Cross Reference Guide
    281.79 KB
    5/11/2023
    DUCTSD & D4120 Cross Reference
    281.79 KB
    5/11/2023
    InnovairFlex Duct Smoke Detector
    51.33 KB
    5/14/2023
    Fire Safety Product Catalog
    3.65 MB
    5/11/2023
    D4120W Duct Smoke Detector Installation Document
    1.55 MB
    5/8/2023
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    1.55 MB
    5/8/2023
    D4120 Duct Smoke Detector, D4S Sensor Component, D4P120 Power Board Component Installation Document
    1.55 MB
    5/8/2023
    D4120A Duct Smoke Detector, D4SA Sensor Component, D4P120A Power Board Component Installation Guide
    1.42 MB
    3/13/2022
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    85.17 KB
    5/14/2023
    InnovairFlex D4120 D4120 Duct Smoke Detector Data Sheet
    169.92 KB
    5/14/2023
    InnovairFlex Conventional Duct Smoke Detectors Data Sheet
    140.38 KB
    5/17/2023