Maintaining The Fire; Fan Operation - Osburn 2200 Owner's Manual

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
smouldering. If the fire smoulders without flame, re-establish a hotter fire before moving the air
control to the lower setting. A yellow flame burning in the top of the firebox is a good indication of a
clean efficiently burning fire.
Refuelling technique is important for good performance. The best efficiency and performance from
your insert can be achieved by adding partial loads of fuel and allowing them to get up to operating
temperature before adding additional fuel. Adding a large amount of fuel at one time will increase the
time required to get the fuel up to its ignition temperature, and an extended time to reach optimal
performance. When refuelling, open the air control or hold the door partially open 1" (25 mm) or less,
long enough (less than 5 minutes) so that the fire has well established flames. When refuelling, care is
required to ensure that fuel or embers do not fall out of the door opening. The unit will burn at about
2.0 to 2.5 lb/hr (.9 to 1.1kg/hr) at its minimum setting; approximately 20 to 25 lbs (9 to 11.3kg) of
wood are required for an extended burn.

3.6 Fan Operation

1. Allow the insert to reach operating temperature (approximately one hour), before turning on the
fan, since increased airflow from the fan will remove heat and affect the start-up combustion
efficiency.
N : E
OTE NSURE
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LECTRICAL
2. Turn the fan on or off with the variable speed control located on the left side of the fan assembly
below the bottom louvre. The switch settings are Off, High and adjustable down to Low.
T F C I N
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URFACE F HE NSERT
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