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BRK electronic 4120B User Manual

BRK electronic 4120B
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AC Powered Ionization Smoke Alarm
with Battery Back-Up and
Silence Feature
Cat. 4120SB
Input: 120V AC, 60Hz, 0.5A
AC Powered Ionization Smoke Alarm
with Battery Back-up
Cat. 4120B
Input: 120V AC, 60Hz, 0.5A
Model
4120B
4120SB
M06-2016-007 06/00
User’s Manual
Smoke Alarms
Ionization smoke alarms are generally more effective at detecting flaming fires which consume
combustible materials rapidly and spread quickly. Sources of these fires may include paper burning in a
wastebasket, or a grease fire in the kitchen.
Photoelectric smoke alarms are generally more effective at detecting smoldering fires which smolder for hours
before bursting into flame. Sources of these fires may include cigarettes burning in couches or bedding.
For maximum protection, use both types of smoke alarms on each level of your home.
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BRK electronic 4120B Specifications

General IconGeneral
Battery Backup9V Battery
Alarm Sound Level85 dB at 10 feet
Test/Silence ButtonYes
Hush FeatureYes
MountingCeiling or Wall
Weight0.5 lbs
Warranty10-year limited warranty
Sensor TypeIonization
Power SourceHardwired
InterconnectivityUp to 18 devices
LED IndicatorYes

Summary

Smoke Alarms Overview

BRK Electronics Smoke Alarms

General introduction to the BRK Electronics smoke alarm product line.

Ionization vs. Photoelectric Detection

Explains the differences and effectiveness of ionization and photoelectric detection types.

Other Features of Smoke Alarms

Battery (DC) Operated Smoke Alarms

Provides protection during power outages; easy installation.

AC Powered Smoke Alarms

Interconnectable; do not operate during power failure; require electrician.

AC/DC Powered Smoke Alarms (with Battery Back-up)

Interconnectable; operate during power failure; require electrician.

Smoke Alarms for the Hearing Impaired

Special units with visual/audible alarms for accessibility.

Where To Install Smoke Alarms

Residential Placement Guidelines

Diagrams and recommendations for single-family and multi-family homes.

Specific Installation Locations and Recommendations

Mobile Home and Agency Placement

Specific advice for mobile homes and NFPA recommendations.

Where Not To Install Smoke Alarms

Problematic Installation Locations

Avoids areas with combustion particles, humidity, dust, drafts, or extreme temperatures.

Avoiding Dead Air Spaces

Ceiling Installation Guidance

Provides diagrams and recommendations for flat, sloped, and peaked ceilings.

Important Pre-Installation Warnings

Electrical Safety and Operational Requirements

Covers shock hazards, power sources, and wiring advice.

Understanding Alarm Signals

Indicator Lights and Horn Patterns

Details normal, test, and alarm conditions for AC/DC power.

Installation Parts and Locking Features

Mounting Bracket and Power Connector

Describes essential components for mounting and power connection.

Optional Locking Features

Explains how to use features to prevent unauthorized removal.

Battery Compartment Security

Locking and Unlocking the Battery Compartment

Provides step-by-step instructions for securing the battery.

Mounting Bracket Security

Locking and Unlocking the Mounting Bracket

Details the process for securing the alarm to its bracket.

How To Install This Smoke Alarm

Unit Components and Activation

Identifies unit parts and describes initial battery activation.

Installing a Single Smoke Alarm

Stand-Alone Unit Installation Steps

Provides detailed, step-by-step instructions for single unit installation.

Interconnecting Smoke Alarms

Benefits and Requirements

Explains earlier warning and lists compatibility and wiring needs.

How to Interconnect Smoke Alarms

Wiring and Installation Steps

Provides diagrams and detailed steps for connecting multiple alarms.

Testing and Maintenance

Weekly Testing and Regular Care

Instructs on testing frequency, cleaning, and battery replacement.

If This Smoke Alarm Sounds

Responding to Alarms

Guides users on immediate actions and escape plans during an alarm.

Using The Silence Feature

Silencing Unwanted Alarms

Explains how to temporarily quiet an alarm for specific models.

Protecting Your Family From Fire

Fire Safety Planning and Prevention

Covers escape plans, alarm placement, and general fire prevention.

What To Do In Case Of Fire

Emergency Actions and Escape

Provides guidance on steps to take during a fire emergency.

If Your Smoke Alarm Needs Service

Troubleshooting and Maintenance Checks

Outlines checks before returning the unit for service.

Troubleshooting Smoke Alarms

Common Problems and Solutions

Addresses issues like false alarms, chirping, and testing failures.

Special Compliance Considerations

Building Type Suitability

Discusses the unit's use in various residential, institutional, and commercial settings.

Limitations Of Smoke Alarms

Operational Constraints and Lifespan

Covers power, detection, audibility, and product longevity.

10-YEAR LIMITED WARRANTY

Warranty Coverage and Service

Details the terms, conditions, and service procedures for the warranty.

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