Felipe,
You do not have to fire the bottle to pressure check the float bags, simply use compressed air, AND use the Component Maintenance Manual for the procedure plus the re-packing. For information, the squib is not an explosive device in this kit, but is a frangible disk that is fractured by the heat from an internal resistor. The re-packing is a right sh*t of a job.
Further info. The orange bag float packs are no longer approved for 350BA unless gross mass is limited to 1950 kg