Resideo 1039746 Co Alarm Battery Backup Digital Display 120V

Product Description

The RESIDEO 1039746 is a plug-in carbon monoxide alarm designed for residential installation where continuous monitoring of CO levels is required. The unit operates on 120-volt AC power with a replaceable battery backup using two AA alkaline batteries, ensuring protection remains active during power interruptions. An electrochemical CO sensor provides reliable detection, and a large backlit digital display shows real-time CO concentration in parts per million (PPM). A Peak Level Memory function recalls the highest CO level detected, giving service technicians and homeowners actionable data after an event. The single-button Test/Silence control keeps operation straightforward.

This alarm is suited for residential applications including single-family homes, apartments, and similar occupied spaces where plug-in installation near an AC outlet is practical. The unit plugs directly into a standard wall outlet or can be mounted higher on the wall using the included line cord, offering flexibility in placement to meet local code requirements. Installation does not require hardwiring, making it appropriate for property managers, electricians, or HVAC technicians performing indoor air quality compliance work. Two silence modes allow the user to mute the low-battery chirp for up to eight hours or temporarily suppress a nuisance alarm without disabling the device.

Key Features

• Electrochemical CO sensor with real-time PPM readout on backlit digital display
• Peak Level Memory recalls highest detected CO concentration
• 120V AC plug-in operation with replaceable AA battery backup
• Dual silence modes: suppress low-battery chirp up to 8 hours or temporarily silence nuisance alarms
• End-of-life warning alerts when the unit requires replacement
• 85 dB alarm output measured at 10 feet

Compatibility

Designed as a plug-in replacement or new-installation CO alarm for residential environments requiring 120V AC-powered carbon monoxide detection with battery backup. Also sold under BRK model CO615.

Installation Notes

Installation is performed by plugging the unit into a standard 120V AC outlet or mounting it on the wall using the line cord; no hardwiring is required. Before servicing or replacing an existing CO alarm, confirm power to the outlet is off or the previous unit is fully unplugged. Follow NFPA 720 and applicable local codes for CO alarm placement height and proximity to sleeping areas. Do not install in locations with excessive humidity, temperature extremes, or near fuel-burning appliances in a way that may cause nuisance alarms contrary to the manufacturer guidelines.

Technical Specifications

• Power Supply: 120 volts AC plug-in
• Sensor Type: Electrochemical
• Battery Backup: 2 AA alkaline batteries (replaceable)
• Sound Level: 85 dB at 10 feet
• Display: Backlit digital, reads CO in PPM
• Product Height: 1.7 inches
• Product Length: 5 inches
• Product Width: 3.4 inches
• Product Weight: 0.83 pounds
• Color: White
• Warranty: 7 Years Limited

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: 1039746