Heatmor 400-4S, Руководство пользователя

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What should I burn?
This furnace is designed to burn well-seasoned cordwood ONLY.
Well seasoned wood is wood that has been properly prepared for combustion. Proper seasoning is generally
accepted to be wood that has been harvested, split if necessary, and stored for a reasonable amount of time.
The most efficient preparation will result in a wood moisture content of 17 percent to 25 percent. If the
moisture content is more than 30 percent a significant amount of recoverable heat will be utilized in “boiling”
off the water in the wood which escapes as steam. This loss will accelerate as the moisture content increases.
Wood that is too dry will combust too rapidly, thereby increasing heat and fuel loss out of the stack.
Our experience indicates that piece diameters of 6 to 8 inches or less are preferable. Larger pieces (up to 10
inch diameter) will perform well as long as they are properly seasoned. Fortunately, the combustion process
will “see” a mix so that larger/smaller and damper/drier wood combinations can still provide a good result.
Learn to load the furnace to most appropriately match the heat demand. Warmer outdoor temperatures
indicate a need for smaller loads and smaller pieces of wood, thereby matching demand to supply and
resulting in higher efficiencies. Being aware that your individual “Types of Wood” will aid in your decisions.
How does a fire burn out?
When the temperature of the water has reached its high limit (185 degrees Fahrenheit), the combustion air
blower(s) shut off. At this point, the fire “banks”. When the air combustion blower(s) turn back on, there may not
be enough coals to restart the fire. You will then need to restart the fire. If this situation occurs , you may want
to transfer to your standard system for better efficiency.
A new unit will require the establishment of “bed of coals” which will aid in re-establishing proper combustion.
This may take a few burn cycles.
NOTE: To obtain the high efficiencies that the 400-4S is designed for, please follow these guide lines:
The moisture content of wood is very important. Trying to burn “wet” wood is wasteful and not
recommended. When you burn “wet” wood, the moisture must be driven out of the wood before it
burns, so there is heat wasted on driving out this moisture.
We have tested our Heatmor 400-4S at a 100% heatload with 23% and 40% moisture content oak
wood.
100% Heatload:
23% Moisture Content Wood = 77% Efficiency
40% Moisture Content Wood = 58% Efficiency
One cord of Oak has roughly 26.5 Million BTUs of Energy in it.
If you burn this cord of oak when it has 23% Moisture Content you will get roughly 20.4MBTUs of
energy. If you burn this cord of Oak when it has 40% Moisture Content you will get roughly
15.37MBTUs of energy.
Please refer to the “Outdoor Wood Furnace Best Burn Practices”
located on the inside front cover of this manual.