Repeat methods two to 4 for your entire outdated BRK alarms. We advocate changing all alarms while in the technique jointly to keep up ideal program operation; failing to do so might compromise interlink efficiency. The SBBRKSM easichange® kit replaces the discontinued BRK 660MBX optical and 670MBX ionisation smoke alarms https://zanybookmarks.com/story18636063/not-known-details-about-addressable-fire-alarm-control-panels