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INSTALLATION OF THE 

ADF ADAPTER PLUG

ELECTRICAL SHOCK HAZARD. Turn off power to the area where you 
will install this unit at the circuit breaker or fuse box before beginning 
installation. Failure to turn off the power before installation may result in
serious electrical shock, injury or death. Do not restore power until all
Smoke Alarms are completely installed.

•   Installation of this unit must conform to the electrical codes in your

area; Article 760 of NFPA 70 (NEC), NFPA 72, NFPA 101; SBC (SBCCI);
UBC (ICBO); NBC (BOCA); OTFDC (CABO), and any other local or
building codes that may apply. Wiring and installation must be per-
formed by a licensed electrician. Failure to follow these guidelines
may result in injury or property damage.

•   This unit must be powered by a 24-hour, 120VAC pure sine wave 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 may prevent it from providing constant protection.

For all other Smoke Alarm information, instructions and warnings, refer 
to the Smoke Alarm User’s Manual.

Independent evaluation of the
Adapter Plug and interconnect 
compatibility was performed by
Intertek, a division of ETL SEMKO.

© 2007 BRK Brands, Inc., a Jarden Corporation company (NYSE: JAH)
3901 Liberty Street Road, Aurora, IL 60504-8122
All rights reserved.
Consumer Affairs: (800) 323-9005 • www.firstalert.com • www.brkelectronics.com 

US Patent No.: 6,641,433 B2
BRK

®

is a registered trademark of BRK Brands, Inc.

First Alert

®

is a registered trademark of the First Alert Trust.

Firex

®

is a registered trademark of Maple Chase Company.

Printed in Mexico   M08-0125-001   H

06/07

INCOMPATIBLE POWER CONNECTORS:

FIREX

®

DO NOT ATTEMPT

INSTALLATION

INSTALLATION INSTRUCTIONS

1. Verify which MODELS are installed in your system to determine if they are

compatible with the ADF Adapter Plug (see part C below).

2. Turn off AC power.

3. Remove unit. Remove old mounting bracket.

4. Install new mounting bracket (see part A below).

5. Connect the black end of the ADF Adapter Plug to the existing power 

connector (connect part C to part D as shown below).

NOTE: There may not be enough room for the Adapter Plug and additional
wiring to fit in the junction box. If not, the old power connector must be
removed and replaced with a First Alert

®

Power Connector.

6. Connect the other end of the Adapter Plug to the appropriate Smoke Alarm

(connect part C to part B as shown below).

7. Check all connections. Make sure all plugs are completely connected and

snapped together. Ensure the Adapter Plug is securely connected to the
existing Power Connector.

8. Install the base of the Smoke Alarm to the mounting bracket.

9. Restore power to the junction box.

10. Test each Smoke Alarm. Press and hold the test button until the unit alarms.

When testing a series of interconnected units you must test each unit
individually. Make sure all units alarm when each one is tested.

NOTE:

NOTE: Adapter Plug can be used on FIREX

® 

Models manufactured on or

before January 1, 2004.

COMPATIBLE BRK

®

MODELS

All of the listed BRK

®

and First Alert

®

Alarms are compatible with the listed

FIREX

®

Alarms and will work with the enclosed Adapter Plugs.

BRK

®

Alarms

4120, 9120 Series – AC, AC/DC Ion, Silence
5919 – AC Photo
2002RAC – AC/DC Photo
7010 Series – AC, AC/DC Photo, Silence
SC6120B, SC9120B – AC/DC Smoke/CO Combo
HD6135FB – Heat Alarm
RM3 – Auxiliary Relay

FIREX

®

406 (Model #G-6) – AC Ion
4518 (Model #ADC) – AC/DC Ion, Battery in Rear
4618 (Model #FADC) – AC/DC Ion
5000 (Model #FADC) – AC/DC Ion, Latching LED
484 (Model #PG-40) – AC Photo
4480 (Model #PAD) – AC/DC Photo
5700 (Model #ADH) – Heat Alarm
499 – Auxiliary Relay

•  

Maximum of only 12 units (except model G-6) may be interconnected.
Check for model numbers above.

A

B

C

D

Adapter Plug (ADF) Diagram for FIREX

®

Models:

White
Orange

Black

NOTE: ADAPTER PLUG CANNOT BE USED TO CONNECT FIREX

® 

CARBON

MONOXIDE ALARMS.

THE ABOVE MODELS OF FIREX

®

ARE THE ONLY MODELS THAT MAY BE

INTERCONNECTED USING ONE OF THE ADAPTER PLUGS INCLUDED. 
IF THE MODEL IS NOT LISTED, IT MUST BE REMOVED FROM THE SYSTEM.

3055574

RECOGNIZED

COMPONENT

CONFORMS TO 

UL STANDARD 1977

Side View

Plug Pin

View

NOTE: Twist tie should not be removed.

The Parts of This Installation

A   Mounting Bracket

B   BRK

® 

4120, 9120 Series

Smoke Alarm

C   ADF Adapter

D   Existing compatible

power connector

Electrical Rating: 
120V AC, 100mA Maximum

Not for Current Interruption

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