Fire Alarm Control Panel YF-3 YF-3 Fire Alarm Control Panel 2L YF-3 Fire Alarm Control Panel 4L YF-3 Fire Alarm Control Panel 5L YF-3 Fire Alarm Control Panel 8L YF-3 Fire Alarm Control Panel 12L YF-3 Fire Alarm Control Panel 16L YF-3 Fire Alarm Control Panel 20L YF-3 Fire Alarm Control Panel 24L