How to install this smoke alarm – First Alert 9120B User Manual

Page 2

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The Mounting Bracket:
To remove the mounting bracket from the Smoke
Alarm base, hold the Smoke Alarm base firmly and
twist the mounting bracket counterclockwise.
The mounting bracket installs onto the junction box.
It has a variety of screw slots to fit most boxes.

The Power Connector:
The power connector plugs into a power input block on
the Smoke Alarm. It supplies the unit with AC power.

• The black wire is “hot.”

• The white wire is neutral.

• The orange wire is used for interconnect.

If you need to remove the power connector, insert a
flat screwdriver blade between the power connector
and the security tab inside the power input block.
Gently pry back the tab and pull the connector free.

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The Parts of This Unit

1

Mounting Bracket

2

Mounting Slots

3

Locking Pins (break out of bracket)

4

Hot (Black) AC Wire

5

Neutral (White) AC Wire

6

Interconnect (Orange) Wire

7

Latch to Open Battery Compartment

8

Swing-Out Battery Compartment

9

Quick-Connect Power Connector

HOW TO INSTALL THIS SMOKE ALARM

THE PARTS OF THIS SMOKE ALARM

This Smoke Alarm is designed to be mounted on any standard wiring junction box to a 4-inch (10 cm) size, on either the ceiling or wall. Read “Recommended
Locations For Smoke Alarms” and “Locations to Avoid For Smoke Alarms” before you begin installation.
Tools you will need: • Needle-nose pliers or utility knife Standard Flathead screwdriver.

Make sure the Alarm is not receiving excessively noisy power. Examples of noisy power could be major appliances on the same circuit, power from a
generator or solar power, light dimmer on the same circuit or mounted near fluorescent lighting. Excessively noisy power may cause damage to your
Alarm.

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ELECTRICAL SHOCK HAZARD. Turn off the power to the area where the
Smoke Alarm is installed before removing it from the mounting bracket.
Failure to turn off the power first may result in serious electrical shock,
injury or death.

• This unit will not alert hearing impaired residents. It is recommended

that you install special units which use devices like flashing strobe
lights to alert hearing impaired residents.

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

area; Articles 210, 760 of NFPA 70 (NEC), NFPA 72, NFPA 101; ICC;
SBC (SBCCI); UBC (ICBO); 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 unit must be powered by a 24-hour, 120V AC pure sine wave

60 Hz 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.
Unit may be connected to an arc fault circuit interrupter.

• This Smoke Alarm must have AC or battery power to operate.

If the AC power fails, battery back-up will allow the alarm to sound
for at least 4 minutes. If AC power fails and the battery is weak,
protection should last for up to 7 days. If AC power fails and the
battery is dead or missing, the alarm cannot operate.

• 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 open a window or
fan the smoke away from the unit. The alarm will reset automatically
when it returns to normal operation. Never remove the batteries from
a battery operated unit to stop an unwanted alarm (caused by cooking
smoke, etc.). Instead open a window or fan the smoke away from the
unit. The alarm will reset automatically.

• Connect this unit ONLY to other compatible units. See “How To

Install This Smoke Alarm” 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.

• The battery compartment resists closing unless a battery is

installed. This warns you the unit will not operate under DC power
without a battery.

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

sensing chamber and prevent the unit from operating properly.

BEFORE YOU INSTALL THIS SMOKE ALARM, Continued

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