A directory of user manuals and instructions for First Alert products can be found below. FIRST ALERT CO-FA-9B Carbon Monoxide Alarm User Manual. If you're not able to unmount your alarm, you can also find the model number in your user's manual. Find the date of manufacture. The date of manufacture forView and Download Sprue CO-FA-9B user manual online. ALARM. CO-FA-9B security system pdf manual download. The First Alert CO-FA-9B Carbon Monoxide. This carbon monoxide alarm features a permanently installed sensor, If you are installing this CO Alarm for use by others, you must leave this manual—or Bekijk en download gratis de First Alert CO-FA-9B Beveiliging handleiding (pagina 1 van 2) (English). NOTE: This User Manual is available in. NOTE: This User Manual is available in larger text please call 0800 141 2561. INTRODUCTION. The First Alert CO-FA-9B Carbon Monoxide. Poisonous Gas Alarm is