Kidde - Edwards SD-4WJ Super Duct 4 Wire Combo

Product Description

The KIDDE - EDWARDS SD-4WJ is a four-wire combination duct smoke detector designed for air handling and HVAC duct systems. It monitors airflow within ductwork for the presence of smoke and triggers an alarm or system shutdown to prevent smoke circulation through a building. The SD-4WJ uses a four-wire configuration, which supports supervised wiring for both power and alarm signaling. Licensed fire alarm technicians and HVAC professionals typically install and commission this device as part of a larger life safety system.

The SD-4WJ is suited for commercial and light industrial applications where duct-mounted smoke detection is required by fire code. It fits into air handling units and HVAC ductwork to satisfy National Fire Protection Association and local authority having jurisdiction requirements for smoke control in mechanical systems. The four-wire design makes it compatible with conventional fire alarm control panels that require separate power and alarm circuits.

Key Features

• Four-wire combination design supports supervised power and alarm circuit wiring
• Duct-mount configuration for installation directly into HVAC air handling systems
• Combo detector style integrates sensing and housing in a single assembly
• Sold as a single unit for straightforward procurement and inventory tracking

Compatibility

Designed as an OEM-style duct smoke detector for use in commercial HVAC and air handling systems requiring four-wire supervised smoke detection per applicable fire codes.

Installation Notes

Installation must be performed by a licensed fire alarm technician or qualified HVAC professional in accordance with NFPA 72 and NFPA 90A, as well as local authority having jurisdiction requirements. Disconnect power to the air handling unit and the fire alarm control panel before beginning any wiring work. Follow the manufacturer wiring diagram for correct four-wire supervision connections. Do not energize the detector until all wiring has been verified and the system is ready for commissioning.