Multi-Fuel Furnace Operation
Begin by loading the coal or wood into the furnace firebox. The automatic controls of the furnace will then take over, and the oil burner or gas burner will ignite the coal or wood when heat is required.
Note
Electric heating is not automatic (i.e., thermostat controlled) and must be manually started.
Set the two-stage thermostat. The thermostat controls both combustion chambers at separate temperature settings. The oil or gas burner will automatically start and provide supplemental, backup heat if the wood or coal fire cannot maintain the temperatures set on the thermostat.
The wood or coal fire is automatically controlled by the wood or coal thermostat setting. After the wood or coal is ignited and the furnace begins delivering the heat called for by the thermostat, the oil or gas burner automatically shuts off. The thermostat automatically maintains the heat levels inside the structure by controlling the amount of combustion air to the wood or coal fire.
As the wood or coal fire dies down, the temperature inside the structure declines until it reaches the thermostat temperature setting selected for the oil, gas, or electric heat. When this temperature setting is reached, the oil burner, gas burner, or electric heaters automatically start, and the backup combustion chamber then functions as a conventional furnace.