What process is designed to prevent furnace explosions?

The purging cycle is specifically designed to prevent furnace explosions by removing unburned fuel and flammable gases from the combustion chamber and venting them safely outside before ignition occurs. This process ensures that any accumulated gases, which can pose a significant risk if ignited, are cleared from the system. During the purging cycle, the furnace is typically operated with the blower running to expel the potentially dangerous gases, allowing for a safe environment for the ignition cycle to take place subsequently. Proper implementation of the purging cycle is critical for maintaining safety in furnace operation, as it directly addresses the prevention of hazardous conditions that could lead to explosions.