Manual First Alert SA305 (page 2 of 5) (English)

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HOW TO INSTALL THIS SMOKE ALARM

THE PARTS OF THIS SMOKE ALARM

FOLLOW THESE SIMPLE STEPS!

Tools you will need:

• Pencil • Drill with 3/16” (5 mm) drill bit

• Hammer • Standard Flathead screwdriver

1. Remove the mounting bracket from the Smoke Alarm base. Hold the

mounting bracket against the ceiling (or wall) and make a mark at

the center of each of the mounting slots with a pencil.

2. Put the unit where it won’t get covered with dust when you drill the

mounting holes.

3. Using a 3/16” (5 mm) drill bit, drill a hole through each pencil mark.

4. Insert the plastic screw anchors (in the plastic bag with screws) into

the holes. Tap the screw anchors gently with a hammer, if necessary,

until they are flush with the ceiling or wall.

5. Tighten the screws (provided) into the screw anchors.

6. Activate the battery. With the battery

compartment open, install the battery

so the terminals on the battery match

the terminals on the Smoke Alarm.

Match “+” to “+” and “-” to “-.” Push

the battery in until it snaps in securely

and cannot be shaken loose.

If the battery is not snapped in completely, the unit cannot receive

battery power. The Smoke Alarm may beep briefly when you install

the battery—this is normal.

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.

8. Test the Smoke Alarm. See “Weekly Testing.”

The Parts of This Unit

1. Mounting Bracket

2. Mounting Slots and Screws

3. Locking Pins (break out of bracket)

4. Latch to Open Battery Compartment

5. Swing-Out Battery Compartment

To remove the mounting bracket

from the Smoke Alarm base, hold the

Smoke Alarm base firmly and twist the

mounting bracket counterclockwise.

+–

OPTIONAL LOCKING FEATURES

The locking features are designed to discourage unauthorized removal of the battery or Alarm. It is not necessary to activate the locks in

single-family households where unauthorized battery or Alarm removal is not a concern.

These Smoke Alarms have two separate locking features: one to lock the battery compartment, and the other to lock the

Smoke Alarm to the mounting bracket. You can choose to use either feature independently, or use them both.

Tools you will need: • Needle-nose pliers or utility knife • Standard Flathead screwdriver.

Both locking features use locking pins, which are molded into the mounting bracket. Using needle nose pliers or a utility knife,

remove one or both pins from the mounting bracket, depending on how many locking features you want to use.

To permanently remove either lock, insert a flathead screwdriver between the locking pin and the lock, and pry the pin out of the lock.

Locking Pin

TO LOCK THE BATTERY COMPARTMENT

Do not lock the battery compartment until you have installed the

battery and tested the unit.

1. Push and hold test button until the alarm sounds:

3 beeps, pause, 3 beeps, pause.

If the unit does not alarm during testing,

DO NOT lock the battery compartment!

Install a new battery and test again. If the

Smoke Alarm still does not alarm, replace it

immediately.

2. Using needle-nose pliers or a

utility knife, detach one locking

pin from the mounting bracket.

3. Push the locking pin through

the hole near the battery

drawer on the back of the

Smoke Alarm.

TO UNLOCK THE BATTERY COMPARTMENT

1. Remove the Smoke Alarm from the mounting bracket. If the unit is

locked to the bracket, see the section “To Unlock the Mounting

Bracket.”

2. Insert a flathead screwdriver under the

head of the locking pin, and gently pry

it out of the battery compartment lock.

(If you plan to relock the battery

compartment, save the locking pin.)

3. To relock the battery compartment, close the battery door and

reinsert locking pin in lock.

4. Reattach the Smoke Alarm to the mounting bracket.

When replacing the battery, always test the Smoke Alarm before

relocking the battery compartment.

TO UNLOCK THE MOUNTING BRACKET

1. Insert a flathead screwdriver between the

mounting bracket pin and the mounting

bracket.

2. Pry the Smoke Alarm

away from the

bracket by turning

both the screwdriver

and the Smoke Alarm

counterclockwise

(left) at the same

time.

TO LOCK THE MOUNTING BRACKET

1. Using needle-nose pliers, detach one locking pin from mounting bracket.

2. Insert the locking pin into the lock located on the pivoting hinge of the

battery door.

3. When you attach the Smoke Alarm to the mounting bracket, the locking

pin’s head will fit into a notch on the bracket.

Alarm Base

1. Battery Compartment

2. Test button (Model SA300)

2. Test/Silence button (Models

SA303 and SA305)

This unit is designed to be mounted on

the ceiling, or on the wall if necessary.

DO NOT attach this Alarm to an electrical junction box.

Attachment to an electrical box may impair the Alarm’s operation.

Attach directly to wallboard or flat wall or ceiling surface.

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First Alert SA305 Manual

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