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TABLE OF CONTENTS

Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Fire Safety Tips  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Before You Install This Heat Alarm  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
How This Heat Alarm Works  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
How To Install This Heat Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Weekly Testing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Regular Maintenance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
If You Suspect a Problem  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Understanding the Indicator Lights and Alarm Horn Patterns  . . . . . . . . .4
If This Heat Alarm Sounds  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Responding To An Alarm  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
What To Do In Case Of Fire

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Recommended Locations For Heat Alarms  . . . . . . . . . . . . . . . . . . . . . .4-5
Locations To Avoid For Heat Alarms  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Special Compliance Considerations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Limitations of Heat Alarms  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Limited Warranty  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

© 2008 BRK Brands, Inc.  All rights reserved.  Distributed by BRK Brands, Inc.
3901 Liberty Street Road, Aurora, IL 60504-8122
Consumer Affairs: (800) 323-9005
www.brkelectronics.com   •   www.firstalert.com

INTRODUCTION

Thank you for choosing First Alert

®

for your Heat Alarm needs. You have 

purchased a state-of-the-art Heat Alarm designed to provide you with early
warning of increased temperatures that may be the result a fire. 
Key features include:

135º F Fixed Temperature Sensor–Programmed to alarm when temperature
reaches 135º F.

Interconnectable–Can be interconnected with First Alert

®

and BRK

®

Smoke,

CO, and Heat Alarms.

This device is not intended to alert hearing impaired residents.
Smoke Alarms specifically designed for the hearing impaired,
which feature devices like flashing strobe lights, are available 
to alert the hearing impaired in case of fire.

Installation of this Heat Alarm must conform to the electrical
codes in your area; Articles 210 and 300.3 (B) of the National
Electrical Code (NFPA 70), NFPA 72, NFPA 101; SBC (SBCCI);
NBC (BOCA); OTFDC (CABO), and any other local or building
codes that may apply. Wiring and installation must be performed
by a licensed electrician. Failure to follow these guidelines may
result in injury or property damage.

This Heat Alarm is not a Smoke Alarm. This unit is not suitable
protection when used alone. Do not use this unit as the only
means of fire detection in a home. This unit is intended for use
as a supplement to Smoke Alarms.

This Heat Alarm must have AC to operate. If AC power fails, the
alarm cannot operate.

This unit must be powered by a 24-hour, 120VAC 60Hz circuit. 
Be sure the circuit cannot be turned off by a switch, dimmer, or
ground fault circuit interrupter. Failure to connect this unit to a
24-hour circuit and keeping fresh batteries installed, may prevent
it from providing constant protection.

• Never disconnect the power from an AC powered unit to stop an

unwanted alarm. Doing so will disable the unit and remove your
protection. In the case of a true unwanted alarm, press the Test
button or fan the heat away from the unit. The alarm will reset
automatically when it returns to normal operation.

NEVER ignore any alarm. Read “If Your Heat Alarm Sounds” for
more information on how to respond to an alarm. Failure to
respond can result in injury or death.

• Test this Heat Alarm once a week. If it ever fails to test correctly,

have it replaced immediately! If the Alarm is not working properly,
it cannot alert you to a problem.

Connect this Heat Alarm ONLY to other compatible units. 
See “Special Requirements for Interconnected Heat Alarms” for
details. Do not connect it to any other type of alarm or auxiliary
device. Connecting anything else to this unit may damage it or
prevent it from operating properly.

DO NOT stand too close to the unit when the alarm is sounding.
It is loud to alert you in an emergency. Exposure to the horn at
close range may harm your hearing. When testing the unit, step
back when the horn starts sounding.

• Do not paint over the Heat Alarm. Paint may clog the openings to

the sensor and prevent the Heat Alarm from operating properly.

M08-0193-001   P

08/08   Printed in Mexico

USER’S MANUAL

120V AC POWERED 

135ºF FIXED TEMPERATURE HEAT ALARM

120V AC 

~

60 Hz 

0.05 Amps

IMPORTANT! PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information 
about your Heat Alarm’s operation. If you are installing
this Heat Alarm for use by others, you must leave this
manual—or a copy of it—with the end user.

FIRE SAFETY TIPS

Follow safety rules and prevent hazardous situations: 1) Use smoking 
materials properly. Never smoke in bed. 2) Keep matches or lighters away 
from children; 3) Store flammable materials in proper containers; 4) Keep 
electrical appliances in good condition and don’t overload electrical circuits; 
5) Keep stoves, barbecue grills, fireplaces and chimneys grease- and debris-
free; 6) Never leave anything cooking on the stove unattended; 7) Keep
portable heaters and open flames, like candles, away from flammable 
materials; 8) Don’t let rubbish accumulate.

Keep alarms clean, and test them weekly. Replace alarms immediately if they
are not working properly. Heat and Smoke Alarms that do not work cannot
alert you to a fire. Keep at least one working fire extinguisher on every floor,
and an additional one in the kitchen. Have fire escape ladders or other reliable
means of escape from an upper floor in case stairs are blocked.

BEFORE YOU INSTALL THIS HEAT ALARM

IMPORTANT! Read “Recommended Locations for Heat Alarms” and
“Locations to Avoid for Heat Alarms” before beginning. This unit monitors 
the air, and when heat reaches its sensing chamber, it alarms. It can give 
you more time to escape before fire spreads. This unit can ONLY give an 
early warning of developing fires if it is installed, maintained and located
where heat can reach it, and where all residents can hear it, as described in
this manual. This unit will not sense gas, smoke, or flame. It cannot prevent 
or extinguish fires.

Know Where To Install Your Heat Alarms

See “Recommended Locations For Heat Alarms” and “Locations To Avoid
For Heat Alarms” for details.

Know What Heat Alarms Can and Can’t Do

A Heat Alarm can help alert you to fire, giving you precious time to
escape. It can only sound an alarm once heat reaches the sensor. 
See “Limitations of Heat Alarms” for details.

Check Your Local Building Codes

This Heat Alarm is designed to be used in a typical single-family home. It
alone will not meet requirements for boarding houses, apartment buildings,
hotels or motels. See “Special Compliance Considerations” for details.

1

Model

HD6135F

LISTED TO

UL 539

STANDARD

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