![]() Try holding it down for up to 10 seconds (20 seconds on photoelectric models). You may not be holding the test button down long enough.When you are testing your smoke alarm, there are a number of reasons why the alarm might not sound: Recommended replacement for the following obsolete models:Ī: It is important that you frequently test your smoke alarms. The alarm features a latching indicator to identify which unit triggered the alarm, alerting you to the area of danger. If one alarm in the series is triggered, they will all sound. ![]() ![]() It also integrates with up to six other compatible devices, such as bells, horns, and repeaters. In addition to functioning independently, this smoke alarm can also integrate with up to 12 other First Alert or BRK hardwired alarms for coverage of larger spaces. Works in Tandem with Other First Alert Alarms The unit comes with a 9-volt battery and features a pivoting, easy-to-access battery drawer that allows you to replace the battery without dismounting the alarm. This smoke alarm is designed for hardwired installation, but it also features a battery backup that helps ensure continued functionality in the event of a power outage. AC-powered smoke alarms must be installed in accordance with all local electrical codes.īattery Backup for Detection During a Power Outage The alarm also comes with a dust cover to keep the unit clean during construction. The mounting bracket keeps the alarm secure over a wide rotation range while maintaining perfect alignment. To facilitate hassle-free installation, this smoke alarm features a streamlined mounting system with a gasket-less base. The sensor is optimized to detect flaming fires, such as those caused by paper, kitchen grease, and other fast-combusting materials. The First Alert 9120B Hardwired Smoke Alarm with Battery Backup comes equipped with an ultra-reliable ionization sensor to provide the earliest possible warning of a fast-flaming fire. Ionization Sensor Reliably Detects Flaming Fires This hardwired smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast-flaming fires. Hardwired Smoke Alarm with Battery Backup:ĭesigned to help promote household safety, the First Alert 9120B Hardwired Smoke Alarm with Battery Backup can provide a vital early warning of fire. ![]()
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