United States Stove Hotblast HB1440E, Owner'S Installation And Operation Manual

Page: 17 / 28

-17-
OPERATING THE PRIMARY AND SECONDARY AIR SETTINGS
Primary air- is the driving air supply that feeds the fire in the heater. This air is introduced through the damper in
the feed door to sustain the combustion.
Secondary air – is the air supply that is typically introduced above the fire to effectively “re-burn” the smoke
created in the primary combustion before the exhaust gasses exit the stove. This air is preheated before being
injected into the heater so it can react with (re-burn) the smoke when they mix.
When increasing the amount of primary air supplied to the heater, the secondary should also be increased as
well to ensure a clean burn.
Rear Pilot/Tertiary Air – The air that is introduced at the back of the firebox and is to help sustain heat in the
secondary air to help ensure a cleaner burn.
Start up: During Start-up the Primary and the Secondary air adjustments should be in the fully open or the “High”
setting positions. This allows for the maximum amount of combustion air during the initial start-up to insure the
fastest and cleanest start-up. These settings should remain open until the stove has heated up and an adequate
fire has been established. Once the fire is well established, both the primary and the secondary air settings can
be adjusted down to the desired heat setting. The primary and the secondary air mix inside the firebox to provide
a more efficient and cleaner burn. We encourage that you get to know your stove and how it reacts to adjusting
both the primary and the secondary air dampers so that you can achieve the best burn possible for the type of
wood and the draft situations in your particular installation.
AIR CONTROL’S
LOW BURN RATE SETTING
FULLY CLOSED
Rear Pilot Air Damper
FULLY CLOSED
Secondary Air Damper
FULLY CLOSED
Primary Air Damper
MAXIMUM BURN RATE SETTING
FULLY OPENED
Rear Pilot Air Damper
FULLY OPENED
Secondary Air Damper
FULLY OPENED
Primary Air Damper
AIR CONTROL’S
Low Burn Rate High Burn Rate
Primary Air Damper Fully Closed Fully Open
Rear Pilot Air Damper Fully Closed Fully Open
Secondary Air Damper Fully Closed Fully Open