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First Alert Manuals & User Guides

First Alert is a trusted leader in home safety products, manufacturing reliable smoke alarms, carbon monoxide detectors, fire extinguishers, and smart home security solutions.

Tip: include the full model number printed on your First Alert label for the best match.

First Alert Support

Official site: https://www.firstalert.com/
General support: https://support.firstalert.com/s/
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Support phone: 1-800-323-9005 — 7 days a week
Contact form: Contact manufacturer support

First Alert manuals

Latest manuals from manuals+ curated for this brand.

First Alert SA520A Smoke Alarm User Manual: Installation & Operation

User Manual

Comprehensive user manual for the First Alert SA520A smoke alarm. Learn about its AC power with battery backup, wireless interconnect features, installation steps, maintenance, and important fire safety tips for…

First Alert RM4 Accessory Relay User Manual and Installation Guide

User Manual

User manual for the First Alert RM4 Accessory Relay, detailing its function, compatibility with BRK and First Alert alarms, installation instructions, wiring diagrams, and warranty information. Learn how to interconnect…

First Alert SmartBridge DVR Security System Quick Start Guide

quick start guide

Quick start guide for the First Alert SmartBridge DVR security system. Learn how to connect your DVR, cameras, monitor, mouse, and network for easy setup and remote access.

First Alert ZCOMBO Combination Smoke and Carbon Monoxide Alarm User Manual

User Manual

Comprehensive user manual for the First Alert ZCOMBO Combination Smoke and Carbon Monoxide Alarm. Learn about installation, maintenance, testing, safety features, troubleshooting, and Z-Wave integration for enhanced home safety.

First Alert GCO1 Plug-In Explosive Gas and Carbon Monoxide Alarm User's Manual

User's Manual

Comprehensive user manual for the First Alert GCO1 Plug-In Explosive Gas and Carbon Monoxide Alarm. Covers safety, installation, operation, testing, maintenance, troubleshooting, and regulatory information.

First Alert Homeowner's Guide: Understanding Smoke & Smoke/CO Combo Alarms

User Guide

A comprehensive guide from First Alert and BRK Electronics for homeowners, explaining the features, operation, maintenance, and importance of smoke and smoke/CO combo alarms. Covers LED indicators, battery backup, interconnected…

Installation Guide for BRK ADK Adapter Plug with Kidde and First Alert Smoke Alarms

Installation Guide

Detailed installation instructions and compatibility guide for the BRK ADK Adapter Plug, enabling interconnection of BRK, First Alert, Kidde, Fyrnetics, and Lifesaver smoke alarms. Includes safety warnings and model compatibility…

First Alert Anti-Theft Safe Operation and Installation Guide

operation and installation guide

This guide provides detailed instructions for operating, installing, and maintaining your First Alert Anti-Theft Safe models 2074F, 2074EF, 2079F, and 2079EF. Includes setup, programming, care, troubleshooting, and warranty information.

First Alert CO400B Carbon Monoxide Alarm - Technical Specifications and Features

Technical Specification

Detailed information on the First Alert CO400B battery-powered carbon monoxide alarm, including its electrochemical sensor, silence features, end-of-life signal, technical specifications, shipping details, and installation guidelines.

First Alert SMICO105-AC Smoke and Carbon Monoxide Alarm User Manual

User Manual

User manual for the First Alert SMICO105-AC AC-powered Smoke and Carbon Monoxide Alarm with 10-year battery backup. Covers installation, features, testing, maintenance, and safety guidelines for enhanced home protection.

First Alert CO615 Plug-In Carbon Monoxide Alarm User Manual

User's Manual

Comprehensive user manual for the First Alert CO615 Plug-In Carbon Monoxide Alarm, covering safety information, installation, operation, maintenance, troubleshooting, and warranty details.

First Alert SM210M Micro Smoke Alarm User Manual

User Manual

User manual for the First Alert SM210M 10-year sealed battery micro smoke alarm, covering installation, testing, maintenance, safety, and troubleshooting. Learn about alarm features, placement recommendations, and warranty information.

First Alert manuals from online retailers

First Alert SMCO100V-AC Hardwire Combination Smoke & Carbon Monoxide Alarm User Manual

SMCO100V-AC • December 1, 2025

Comprehensive user manual for the First Alert SMCO100V-AC Hardwire Combination Smoke & Carbon Monoxide Alarm, featuring battery backup and voice alerts. Includes setup, operation, maintenance, and troubleshooting.

First Alert SMICO100-AC Combination Smoke & Carbon Monoxide Alarm Instruction Manual

SMICO100-AC • November 17, 2025

Comprehensive instruction manual for the First Alert SMICO100-AC Interconnect Hardwire 2-in-1 Smoke & CO Alarm with Battery Backup, covering installation, operation, maintenance, and safety guidelines.

First Alert SMCO100V-AC Combination Smoke and Carbon Monoxide Alarm User Manual

SMCO100V-AC • November 5, 2025

Instruction manual for the First Alert SMCO100V-AC Combination Smoke and Carbon Monoxide Alarm, featuring hardwire interconnectivity, battery backup, and voice alerts for enhanced home safety.

First Alert SMCO210V 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm User Manual

SMCO210V • November 3, 2025

Comprehensive user manual for the First Alert SMCO210V 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm, including setup, operation, maintenance, troubleshooting, and specifications.

First Alert SC9120A Hardwired Smoke and Carbon Monoxide Alarm User Manual

SC9120A • November 3, 2025

Comprehensive user manual for the First Alert SC9120A hardwired smoke and carbon monoxide alarm, covering installation, operation, maintenance, troubleshooting, and safety information.

First Alert CO605 Carbon Monoxide Detector User Manual

CO605 • November 2, 2025

This manual provides essential information for the installation, operation, and maintenance of your First Alert CO605 Carbon Monoxide Detector. This plug-in alarm features a battery backup for continuous…

First Alert SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location User Manual

SCO500B • October 27, 2025

Comprehensive user manual for the First Alert SCO500B wireless interconnected smoke and carbon monoxide alarm, covering installation, operation, maintenance, and troubleshooting.

First Alert Manuals & User Guides

First Alert manuals

First Alert SA520A Smoke Alarm User Manual: Installation & Operation

First Alert RM4 Accessory Relay User Manual and Installation Guide

First Alert SmartBridge DVR Security System Quick Start Guide

First Alert ZCOMBO Combination Smoke and Carbon Monoxide Alarm User Manual

First Alert GCO1 Plug-In Explosive Gas and Carbon Monoxide Alarm User's Manual

First Alert Homeowner's Guide: Understanding Smoke & Smoke/CO Combo Alarms

Installation Guide for BRK ADK Adapter Plug with Kidde and First Alert Smoke Alarms

First Alert Anti-Theft Safe Operation and Installation Guide

First Alert CO400B Carbon Monoxide Alarm - Technical Specifications and Features

First Alert SMICO105-AC Smoke and Carbon Monoxide Alarm User Manual

First Alert CO615 Plug-In Carbon Monoxide Alarm User Manual

First Alert SM210M Micro Smoke Alarm User Manual

First Alert manuals from online retailers

First Alert SMCO100V-AC Hardwire Combination Smoke & Carbon Monoxide Alarm User Manual

First Alert SMICO100-AC Combination Smoke & Carbon Monoxide Alarm Instruction Manual

First Alert SMCO100V-AC Combination Smoke and Carbon Monoxide Alarm User Manual

First Alert SMCO210V 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm User Manual

First Alert SC9120A Hardwired Smoke and Carbon Monoxide Alarm User Manual

First Alert CO605 Carbon Monoxide Detector User Manual

First Alert SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location User Manual

First Alert HOME2PRO Fire Extinguisher User Manual

First Alert FE1A10GR Marine Fire Extinguisher User Manual

First Alert CO615 Dual-Power Plug-In Carbon Monoxide Detector User Manual

First Alert 9120B Hardwired Smoke Alarm with Battery Backup - User Manual

First Alert SMI100-AC Hardwire Interconnect Smoke Alarm with Battery Backup User Manual