United States Stove Company 7700 Manual page 30

• NEVER OVERFIRE YOUR FURNACE. IF ANY PART OF THE FURNACE STARTS TO GLOW RED, OVER FIRING
IS HAPPENING. READJUST THE AIR INTAKE CONTROL AT A LOWER SETTING.
• THE INSTALLATION OF A LOG CRADLE OR GRATES IS NOT RECOMMENDED IN YOUR WOOD FURNACE.
BUILD FIRE DIRECTLY ON FIREBRICK.
• NEVER PUT WOOD ABOVE THE FIREBRICK LINING OF THE FIREBOX.
RELOADING
Once you have obtained a good bed of embers, you should reload the unit. In order to do so, open the air controls to maximum a few
seconds prior to opening the furnace's door. Then proceed by opening the door very slowly. Then bring the red embers to the front of
the furnace and reload the unit.
For optimal operation of your wood furnace, we recommend you to operate it with a wood load approximately equivalent to the 3/4
of the height of fire bricks.
It is important to note that wood combustion consumes ambient oxygen in the room. In the case of negative pressure, it is a good idea
to allow fresh air in the room, either by opening a window slightly or by installing a fresh air intake system on an outside wall.
Creosote - Formation and Need for Removal - When wood is burned slowly, it produces tar and other organic vapors, which combine
with expelled moisture to form creosote. The creosote vapors condense in the relatively cool chimney flue of a slow-burning fire. As a
result, creosote residue accumulates on the flue lining. When ignited, this creosote makes an extremely hot fire. The chimney connector
and chimney should be inspected at least twice monthly during the heating season to determine if a creosote build-up has occurred. If
creosote has accumulated (3mm or more), it should be removed to reduce the risk of a chimney fire.
We strongly recommend that you install a magnetic thermometer on your smoke exhaust pipe, approximately 18" above the furnace.
This thermometer will indicate the temperature of your gas exhaust fumes within the smoke exhaust system. The ideal temperature for
these gases is somewhere between 275°F and 500°F. Below these temperatures, the build-up of creosote is promoted. Above 500 degrees,
heat is wasted since a too large quantity is lost into the atmosphere.
This wood heater has a manufacturer-set minimum low burn rate that must not be altered. It is against federal regulations to alter this
setting or otherwise operate this wood heater in a manner inconsistent with operating instructions in this manual.
VISIBLE SMOKE
The amount of visible smoke being produced can be an effective method of determining how efficiently the combustion process is
taking place at the given settings. Visible smoke consist of unburned fuel and moisture leaving your stove. Learn to adjust the air settings
of your specific unit to produce the smallest amount of visible smoke. Wood that has not been seasoned properly and has a high wood
moisture content will produce excess visible smoke and burn poorly. Use the included moisture meter to insure your wood has a 20%
or less moisture content.
TO PREVENT CREOSOTE BUILD UP
Always burn dry wood. This allows clean burns and higher chimney temperatures, therefore less creosote deposit. Leave the air control
full open for about 5 min. every time you reload the furnace to bring it back to proper operating temperatures. The secondary combustion
can only take place if the firebox is hot enough.
Always check for creosote deposit once every two months and have your chimney cleaned at least once a year. If a chimney or creosote
fire occurs, close all dampers immediately. Wait for the fire to go out and the heater to cool, then inspect the chimney for damage. If no
damage results, perform a chimney cleaning to ensure there is no more creosote deposits remaining in the chimney.
• ASHES COULD CONTAIN HOT EMBERS EVEN AFTER TWO DAYS WITHOUT OPERATING THE FURNACE.
• THE ASH PAN CAN BECOME VERY HOT. WEAR GLOVES TO PREVENT INJURY.
• NEVER BURN THE FURNACE WITH THE ASH TRAP OPEN. THIS WOULD RESULT IN OVER FIRING THE
FURNACE. DAMAGE TO THE FURNACE AND EVEN HOUSE FIRE MAY RESULT.
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WARNINGS
CAUTIONS:
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