Central Boiler FireStar - Burn Adjustment Guide; Excessive Smoke Condition; Fire Goes Out Condition

14
FORGE OUTDOOR COAL FURNACE • OWNER'S MANUAL
Burn Adjustment Guide
Use the following recommendations to help obtain a clean and ecient burn
and extract the most heat from your coal. When making any adjustments, it
is best to change settings gradually and allow the furnace to burn for a few
loading cycles to determine if the settings you've changed are benecial to
operation.
CONDITION: Excessive smoke from the chimney.
NOTE: This condition is typically only an issue when burning bituminous.
RECOMMENDED ACTIONS:
• Make sure you are using IGNITION ASSIST MODE after lling the furnace
with a new load of bituminous coal and closing the rebox door.
• Increase time of IGNITION ASSIST DURATION (Menu #6) to increase
the amount of time air is available.
• Increase IGNITION ASSIST OVER AIR SETTING (Menu #8), if not
already set to 100. Also make sure that the ue gas temperature doesn’t
consistently drop after making this adjustment. If it does, the smoke could be
getting diluted instead of burned.
• Decrease the IGNITION ASSIST UNDER AIR SETTING (Menu #7) to
reduce the under air and slow down the rate that volatiles are released from
the coal.
• Try dierent loading techniques making sure that there is an area of exposed
glowing coals to ignite the volatile gases.
• Check to make sure that neither the over or under air outlets are plugged.
• Make sure the outdoor furnace is up to temperature and that the heat load is
not greater than the outdoor furnace heat output capacity.
• Some types of coal, because of their sulfur and impurity content, will always
smoke, regardless of what settings are adjusted.
CONDITION: Fire goes out.
RECOMMENDED ACTIONS:
• Make sure there are enough glowing coals to ignite the fuel load. If not, load
more frequently so there are enough coals remaining to ignite the fuel load.
• Make sure there are no restrictions to the combustion air. Check for any
clinker buildups in the rebox, check the over and under air holes to ensure
they are free of debris, and make sure the combustion fan inlet isn’t blocked.
• Make sure the over and under air actuators, and the combustion blower are
functioning properly.
• Increase the STANDARD RUN MODE UNDER AIR SETTING (Menu
#10) to provide additional under air (primary combustion air).