Kidde Edwards SD-2W 2-wire Duct Smoke Detector

Product Description

The KIDDE EDWARDS SD-2W is a 2-wire duct smoke detector sensor designed to monitor air handling units and HVAC ductwork for the presence of combustion products. It connects directly into a conventional 2-wire initiating device circuit, drawing power from the panel without a separate power supply. The sensor mounts to duct housings used in air distribution systems and signals the fire alarm control panel when smoke is detected in the airstream. Licensed fire alarm technicians and HVAC professionals typically install and commission this device during new construction or system upgrades.

The SD-2W is intended for use in commercial and light industrial HVAC applications where duct smoke detection is required by code. It fits into duct detector housings and is used to initiate fan shutdown, damper closure, or alarm notification upon detecting smoke in the supply or return air stream. This device is categorized as a duct and beam detector accessory and is sold as a single unit.

Key Features

• 2-wire initiating device circuit connection — no separate power supply required
• Designed for installation in HVAC air handling and duct systems
• Supports fan shutdown and damper control integration on alarm
• Sold as a single sensor unit
• Compatible with standard duct detector housing assemblies

Compatibility

Designed as an OEM-style replacement or new-installation sensor for use with compatible duct detector housings in commercial HVAC fire detection systems. No specific compatible model numbers were provided in the available product data.

Installation Notes

Installation should be performed by a licensed fire alarm technician in accordance with NFPA 72 and local authority having jurisdiction requirements. Disconnect power to the fire alarm control panel initiating circuit before wiring the device. Verify duct housing orientation and airflow direction markings prior to securing the sensor. Do not operate the detector without the duct housing properly sealed to avoid nuisance alarms from ambient conditions outside the duct.