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 Heat Alarms have two separate locking features: one to lock the battery compartment, and the other to lock the Heat Alarm to the mounting bracket. You can choose to use either feature independently, or use them both.

Locking Pin

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.

TO LOCK THE BATTERY COMPARTMENT

Do not lock the battery compartment until you have activated the battery and tested the battery back-up.

1. Activate the battery back-up by removing the “Pull to Activate Battery Back-Up” tab.

DO NOT remove the battery activation until AC power is turned on to conserve battery power.

2.Press the Test/Silence button until you hear a brief acknowledge (or feedback) chirp. The alarm will sound: 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 Heat Alarm still does not alarm, replace it immediately.

3. Using needle-nose pliers or a utility knife, detach one locking pin from the mounting bracket.

4. Push the locking pin through the black dot on the label on the back of the Heat Alarm.

TO UNLOCK THE BATTERY COMPARTMENT

Once the Heat Alarm is installed, you must disconnect it from the AC power before unlocking the battery compartment.

ELECTRICAL SHOCK HAZARD. Turn off the power to the area where the Heat 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.

Turn off the AC power at the circuit breaker or fuse box.

1.Remove the Heat Alarm from the mounting bracket. If the unit is locked to the bracket, see the section “To Unlock the Mounting Bracket.”

2.Disconnect the power connector by gently

prying it away from the back of the Heat Alarm.

3. 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.)

4. To relock the battery compartment, close the battery door and reinsert locking pin in lock.

5.Reconnect the power connector to the back of the Alarm, reattach the Heat Alarm to the mounting bracket, and restore the power.

When replacing the battery, always test the Heat Alarm before relocking the battery compartment.

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 Alarm to the mounting bracket, the locking pin’s head will fit into a notch on the bracket.

TO UNLOCK THE MOUNTING BRACKET

Always discharge the branch circuit before servicing an AC or AC/DC Heat Alarm. First, turn off the AC power at the circuit breaker or fuse box. Next, remove the battery from Alarms with battery back-up. Finally, press the test button to discharge the branch circuit.

1.Insert a flathead screwdriver between the mounting bracket pin and the mounting bracket.

2.Pry the Heat Alarm away from the bracket by turning both the screw- driver and the Heat Alarm counterclockwise (left) at the same time.

HD6135FB specifications

The First Alert HD6135FB is a state-of-the-art smoke and carbon monoxide alarm that combines advanced technology with user-friendly features. Designed to provide peace of mind for homeowners, the HD6135FB offers reliable performance and comprehensive safety monitoring.

One of its main features is the photoelectric sensor. This technology helps to reduce false alarms by quickly detecting smoldering fires that produce smoke without large flames. By distinguishing between different types of smoke, the HD6135FB minimizes unnecessary disruptions while still responding rapidly to genuine fire threats. Additionally, the unit includes an electrochemical CO sensor, which is highly sensitive in detecting carbon monoxide leaks, making it essential for safeguarding against this odorless and potentially deadly gas.

User convenience is prioritized in this model, as illustrated by its intuitive design. The First Alert HD6135FB comes equipped with a voice alarm feature, providing clear spoken warnings to alert homeowners to the specific danger—whether smoke or carbon monoxide. This audible notification ensures that residents can quickly respond to potential threats.

The device also boasts a battery-operated design, allowing for easy installation without the need for hardwiring. It is powered by lithium batteries, known for their long life, which reduces the frequency of battery changes. Additionally, the low battery chirp alerts users when it's time to replace the batteries, enhancing convenience and safety.

To make maintenance straightforward, this smoke and CO alarm includes a test/silence button. Homeowners can easily test the functionality of the device and silence false alarms with a single touch. Furthermore, the HD6135FB features a snap-on cover that streamlines battery replacements, minimizing the hassle associated with maintenance.

With its sleek design and compact profile, the First Alert HD6135FB is suitable for various home environments, easily blending with any decor. It is also equipped with an indicator light that provides a visual cue of the unit's operating status, ensuring residents are aware of its functionality at all times.

Overall, the First Alert HD6135FB represents a blend of cutting-edge technology, thoughtful design, and essential safety features, making it an excellent choice for homeowners committed to maintaining a safe living environment. Its integration of photoelectric and electrochemical sensors, along with user-friendly functionalities, establishes it as a reliable guardian against two of the most significant hazards in residential areas: fire and carbon monoxide.