Kidde KIR-DDOS Optica Intelligent Duct Smoke Detector Rotary Addressed

Kidde KIR-DDOS Optica Intelligent Duct Smoke Detector Rotary Addressed

The Kidde KIR-DDOS Optica Rotary Duct Smoke Detector is an intelligent, addressable HVAC duct detector for fire alarm systems. It uses photoelectric light-scattering detection, rotary switch addressing, and environmental compensation to identify smoke in ductwork while helping reduce unwanted alarms from dust and gradual environmental changes.

Built for commercial fire detection projects, the KIR-DDOS suits HVAC duct smoke monitoring, system upgrades, and replacement installations where fast field access matters. Installers can use existing wiring, align the sampling tube in 45-degree increments, and access field connections without special tools for cleaner service workflows.

The Optica design separates sensing and control sections while using conformally coated circuit boards and protective coatings to keep contaminants away from sensitive electronics. It supports Kidde Intelligent Rotary Loop controllers, includes one Form C auxiliary alarm relay, and carries UL, ULC, and CSFM agency listings for professional life-safety applications.

Key Features

• Intelligent Duct Detection: Monitors HVAC duct airflow for smoke and sends alarm information to compatible Kidde intelligent systems.
• Rotary Switch Addressing: Provides manual device addressing from 1 to 127 for system setup and identification.
• Photoelectric Detection: Uses light-scattering sensing technology for reliable smoke detection in duct environments.
• Low-Profile Housing: Measures less than 2.5" deep for tight duct and mechanical space installations.
• Wide Air Velocity Range: Supports duct airflow from 100 to 4,000 ft/min for demanding HVAC applications.
• Auxiliary Alarm Relay: Includes one Form C relay for ancillary equipment such as HVAC controls.
• Magnet-Activated Test Switch: Enables convenient testing during installation and maintenance.
• Environmental Compensation: Uses differential sensing to help maintain stable sensitivity and reduce nuisance alarms.

Technical Specifications

• Brand: Kidde Commercial
• Manufacturer Part Number: KIR-DDOS
• ADI Part Number: ED-KIRDDOS
• Product Name: Optica Intelligent Duct Smoke Detector
• Product Type: Duct smoke detector
• Product Series: Optica
• Addressing: Rotary addressed, 1 to 127
• Connectivity Technology: Wired
• Sensor Type: Light sensor
• Detection Method: Photoelectric, light scattering principle
• Smoke Sensitivity: 1.5% to 4.5%/ft obscuration
• Air Velocity Rating: 100 to 4,000 ft/min
• Air Pressure Differential: 0.01 to 0.83 inch of water
• Alarm Test Response Time: 5 seconds
• Operating Voltage: 15.2 to 19.95 VDC
• Operating Current: 50 µA standby, 60 µA alarm
• Common Alarm Relay: One Form C relay, unsupervised and power-limited
• Relay Ratings: 3.0A at 30VDC, 3.0A at 120VAC, 1.5A at 240VAC
• LED Indicators: Alarm red, test amber, normal green
• Wire Size: 14 to 22 AWG
• Compatible Panels: Kidde Intelligent Rotary Loop controllers
• Compatible Electrical Boxes: North American 1-gang box; standard 4" square box, 1-1/2" deep, with 1-gang cover
• Operating Temperature: -20°F to 158°F
• Relative Humidity: 0 to 93%, noncondensing
• Storage Temperature: -20°F to 158°F
• Color: Red
• Agency Listings: UL, ULC, CSFM
• Certifications: UL 268, UL 268A
• UL Listed: Yes
• Dimensions: 7.75" L x 6.1" W x 2.5" H
• Weight: 2.4 lbs