Maintaining The Fire - Osburn 2400 Owner's Manual

6. Ideally the large kindling should be burned until a thick bed of red embers is obtained. At that
point, add cordwood fuel and continue to operate the draft control wide open until the fire is well
established. Once the firebox is hot, the draft control can be partially closed by moving the knob
to the left to adjust the intensity of the fire.
Use Table 3.2 to adjust the draft control to the desired burn rate:
BURN RATE
Low & Medium Low Gently push the draft control rod all the way in
Medium
Medium High
High
Closing the draft control down too soon will lower combustion efficiency, and may result in
creosote build-up in the chimney (which could lead to a future chimney fire).
Caution:
The Adjustment Range Should Not Be Altered For Increased Firing For Any Reason.
3.5

Maintaining The Fire

Your Osburn insert will work best if a thick bed of hot embers is maintained in the bottom of the
firebox, and a minimum of two large pieces of seasoned fuel are added. Combustion efficiency is
largely related to establishing a hot ember bed, and hot firebox temperatures. The quicker the insert
and fuel get up to operating temperature, the better. A small intense fire is preferred to a large
smouldering fire, both to improve combustion efficiency and to reduce the amount of creosote
emitted. The best performance will be achieved by adding relatively small amounts of fuel to a well
established ember bed, and then operating with the air inlet control open long enough to achieve a
hot fire. Cordwood should be placed with air in between individual pieces. Use a poker to make an
air channel in the embers below the wood, this will allow air to flow under the wood for a more
efficient burn.
Extended burn times can be accomplished by first operating the insert on a full load with the air inlet
controls wide open. Once the fire is well established, and the moisture has been driven out of the
wood, reduce the air control to a lower setting. The unit should then burn cleanly without
Draft Settings
DRAFT SETTINGS
Gently pull the draft control rod out to approx.
1/8"
Gently pull the draft control rod out to approx.
1/2"
Gently pull the draft control rod all the way out
Table 3.2
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