Which burner option preheats the crematory?

The primary burner is designed to preheat the crematory unit before the actual cremation process begins. In a crematory system, the primary burner initiates the heating process, raising the temperature of the chamber to the required levels for safe and effective cremation. This initial heating is essential because it prepares the cremation chamber by maintaining the necessary temperature for efficient combustion and ensuring that the cremains are processed correctly.

While the afterburner plays a crucial role in the cremation process by further incinerating gases and materials after the primary combustion, it does not preheat the crematory but rather operates after the primary burner is engaged to enhance combustion efficiency and reduce emissions. The backup burner and secondary burner also serve specific roles but are not primarily responsible for the initial preheating required for cremation. Therefore, the primary burner is the correct choice for preheating the crematory unit.