18
CLEANFIRE OUTDOOR FURNACE • OWNER'S MANUAL
Operating Instructions
FIRESTAR COMBUSTION CONTROLLER
Refer to the FireStar Combustion Controller Operation Manual for
information about the combustion controller.
How the CleanFire Works
Because of its highly efficient and clean-burning design, the CleanFire
operates differently than other types of wood-burning devices.
Understanding a few basic principles will help you operate the CleanFire as
it was designed, maximizing its performance, heat transfer and longevity.
NOTE: For proper operation, the fuel must match the heat load, the furnace must be
maintained to ensure proper air flow, and the water temperature must be kept above
150˚F (66˚C).
1. The combustion air fan pressurizes the airbox located at the front of the
outdoor furnace. Primary air flow, regulated by an actuator motor, flows
into the firebox through combustion air inlets located on the front and
sides near the bottom. Secondary air is regulated by a second actuator
motor that allow air flow through the air tube. Combustion starts in the
firebox near the bottom of the wood load.
Operating with Properly Seasoned Wood
Ash
Coals
Burning
Drying
Ash
Operating with Wood with Too Much Moisture
Less Coals
Less Burning
More Drying
NOTE: When the volume of burning wood is greater than the volume of drying wood, the outdoor furnace operates more efficiently.
Wood in
the Firebox
Wood in
the Firebox
• Burns more efficiently
• Minimizes amount of wood used
• Reduces emissions
• Extends life of furnace
• Reduces bridging
• Burns less efficiently
• Increases amount of wood used
• Lowers combustion rates
• Increases maintenance requirements
• Increases bridging
© 2019 Central Boiler
