Model 4120SB Only: During installation, if you accidentally press the Silence button, the alarm will “chirp” once a minute for up to 15 minutes and the Test feature will be temporarily disabled. This is normal. The “chirping” will stop once the alarm returns to normal operation.

TESTING AND MAINTENANCE

WEEKLY TESTING

NEVER use an open flame of any kind to test this unit. You might accidentally damage or set fire to the unit or to your home. The built-in test switch accurately tests the unit’s operation as required by Underwriters Laboratories, Inc. (UL). If you choose to use an aerosol smoke product to test the smoke alarm, be certain to use one that has been Listed to Underwriters Laboratories, Inc. Safety Standards, and use it only as directed. Use of non- UL Listed products or improper use of UL Listed products may affect the Smoke Alarm’s sensitivity.

It is important to test this unit every week to make sure it is working properly. Using the test button is the recommended way to test this Smoke Alarm.

Press and hold the test button on the cover of the unit until the alarm sounds (the unit may continue to alarm for a few seconds after you release the button). If it does not alarm, make sure the unit is receiving power and test it again. If it still does not alarm, replace it immediately. During testing, you will hear a loud, repeating horn pattern:

3 beeps, pause, 3 beeps, pause.

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

REGULAR MAINTENANCE

This unit has been designed to be as maintenance- free as possible, but there are a few simple things you must do to keep it working properly:

Test it at least once a week.

Gently vacuum off any dust on the cover at least once a month using your vacuum’s soft brush attachment. Test the unit after vacuuming the cover.

Never use water, cleaners or solvents since they may damage the unit.

Relocate the unit if it sounds frequent unwanted alarms. See “Where Not To Install Smoke Alarms” for details.

Models 4120SB and 4120B Only: When the battery back-up becomes weak, the Smoke Alarm will “chirp” about once a minute (the low battery warning). This warning should last 7 days, but you should replace the battery imme- diately to continue your protection.

Models 4120SB and 4120B Only:

Choosing a replacement battery:

Your Smoke Alarm’s battery back-up requires one stan- dard 9V battery. The following batteries are acceptable as replacements. This list supplements the list on the Smoke Alarm battery door: Eveready #216, #522 (Energizer), #1222; Duracell #MN1604, MX1604 (Ultra); Gold Peak #1604P, #1604S; Rayovac 1604, D1604. You may also use a Lithium battery like the Ultralife U9VL-J for longer service life between battery changes. These batteries are available at many local retail stores.

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BRK electronic 4120 AC, 4120SB Testing and Maintenance, Weekly Testing, Regular Maintenance, Beeps, pause, 3 beeps, pause

4120 AC, 4120SB specifications

The BRK Electronics 4120SB and 4120AC are advanced smoke alarms designed to enhance safety in residential and commercial settings. These alarm models integrate innovative technologies and features that provide reliable performance and peace of mind to users.

The 4120SB model is a battery-operated smoke alarm, making it ideal for applications where hardwired alarms may not be feasible. Utilizing a photoelectric sensor, it is designed to detect smoldering fires, which often produce dense smoke without high flames. This increases the likelihood of early detection, allowing occupants crucial time to evacuate safely. On the other hand, the 4120AC is a hardwired option that connects directly to the building’s electrical system, ensuring uninterrupted power supply while incorporating a battery backup. This guarantees continuous operation, even during power outages.

Both models are equipped with a loud 85-decibel alarm, ensuring that residents are alerted promptly in case of smoke detection. The devices also feature a test/silence button, allowing users to easily test the functionality of the alarm or silence it in the event of a false alarm caused by cooking fumes.

Safety is further enhanced by the incorporation of a Tamper-resistant feature that prevents unauthorized removal of the alarm from its mounted location. The alarm also includes a LED indicator that provides a visual cue of the unit’s operational status. When the unit is powered on and functioning correctly, the green LED will blink periodically. In contrast, a continuous red LED indicates an active alarm condition.

Both the 4120SB and 4120AC are designed for user-friendly installation. The units come with clear instructions and mounting hardware, allowing homeowners and professionals to easily install them in their desired locations. The compact design ensures that they can fit seamlessly into a variety of interiors.

Overall, the BRK Electronics 4120SB and 4120AC represent robust solutions for smoke detection. Their integration of advanced photoelectric technology, user-friendly features, and essential safety mechanisms make them essential components of any fire safety strategy, ensuring that homes and businesses are better protected against the threat of fire. Investing in these smoke alarms not only meets safety regulations but also fosters a proactive approach to fire safety that can save lives.