Chesney's Wood Burning and Multi Fuel Stoves User's Installation Manual page 27

Wood Setting
Setting III primary and secondary air open fully. Air bar is fully extended.
Setting II primary air shut secondary open fully. Air bar partially extended.
Between setting II and I primary air shut secondary partially open.
Setting I primary and secondary air closed. Air bar fully closed.
Coal setting
Setting III primary and secondary air open fully. Air bar is fully extended.
Setting II primary air open secondary air partially open. Air bar partially
extended.
Setting II and I primary and secondary air partially open.
Setting I primary and secondary air very slightly open allowing a small
amount of air into the system.
The Wood Range 4 and 5 Series.
These are designed for wood burning only although, there is a "drop in
multi fuel-grate" available to convert to coal burning from your stockist.
There is one simple control - The Air Flow Bar that automatically distributes
the air for combustion into the top or rear of the furnace.
Pull the bar out for more air giving more heat and a faster burn.
Push the bar in for less air giving less heat and a slower burn.
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