How To Install This Smoke Alarm - First Alert SA4121B User Manual

HOW TO INSTALL THIS SMOKE ALARM

This Smoke Alarm is designed to be mounted on any standard wiring junction box up to a 4-inch size, on either
the ceiling or wall (if allowed by local codes). 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.
THE PARTS OF THIS SMOKE ALARM
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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FOLLOW THESE INSTALLATION STEPS
The basic installation of this Smoke Alarm is similar whether you want to install one Smoke Alarm, or intercon-
nect more than one Smoke Alarm. If you are interconnecting more than one Smoke Alarm, you MUST read
"Special Requirements For Interconnected Smoke Alarms" below before you begin installation.
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.
1. Remove the mounting bracket from the base, and attach it to the junction box.
Models SA4121B, 4120B, and 4120SB: Install battery back-up. Battery back-up cannot work until you
install the battery in the correct position (Match "+" to "+" and "-" to "-").
Or, activate the battery back-up by removing the "Pull to Activate Battery Back-Up" tab.
Push and hold test button until the alarm sounds:
3 beeps, pause, 3 beeps, pause.
2. Using wire nuts, connect the power connector to the household wiring.
The Parts of This Unit
3 1 Mounting Bracket
2 Mounting Slots and Screws*
3 Locking Pins (break out of bracket)
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4 Hot (Black) AC Wire
5 Neutral (White) AC Wire
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6 Interconnect (Orange) Wire
7 Latch to Open Battery Compartment
8 Swing-Out Battery Compartment
9 Quick-Connect Power Connector
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*Not included
STAND-ALONE ALARM ONLY:
• Connect the white wire on the power connector to the neutral wire in the junction box.
• Connect the black wire on the power connector to the hot wire in the junction box.
• Tuck the orange wire inside the junction box. It is used for interconnect only.
INTERCONNECTED UNITS ONLY:
Strip off about 1/2" (12 mm) of the plastic coating on the orange wire on the power connector.
• Connect the white wire on the power connector to the neutral wire in the junction box.
• Connect the black wire on the power connector to the hot wire in the junction box.
• Connect the orange wire on the power connector to the interconnect wire in the junction box. Repeat for
each unit you are interconnecting. Never connect the hot or neutral wires in the junction box to the orange
interconnect wire. Never cross hot and neutral wires between Alarms.
3. Plug the power connector into the back of the Smoke Alarm.
4. Position the base of the Smoke Alarm over the mounting bracket and turn. The Alarm can be positioned over
the bracket every 60°. Turn the Smoke Alarm clockwise (right) until the unit is in place.
5. Check all connections.
STAND-ALONE ALARM ONLY:
• If you are only installing one Smoke Alarm, restore power to the junction box.
INTERCONNECTED UNITS ONLY:
• If you are interconnecting multiple Smoke Alarms, repeat steps 1-5 for each Smoke Alarm in the
series. When you are finished, restore power to the junction box.
ELECTRICAL SHOCK HAZARD. Do not restore power until all Smoke Alarms are completely installed.
Restoring power before installation is complete may result in serious electrical shock, injury or death.
6. Make sure the Smoke Alarm is receiving AC power. Under normal operation, the Green power indicator light
will shine continuously.
7. If the Green power indicator light does not light, TURN OFF POWER TO THE JUNCTION BOX and
recheck all connections. If all connections are correct and the Green power indicator still does not light
when you restore the power, the unit should be replaced immediately.
8. 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.
If any unit in the series does not alarm, TURN OFF POWER and recheck connections. If it does not alarm when
you restore power, replace it immediately.
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