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UFB908 Universal Filter Box When installing ANYwarm air furnace, proper installation is the key and required for getting the most efficiency and longest life out of your unit. Failure to install your furnace as outlined from the manufacturer, often will result in inadequate heating and problems associated with drafting. U. S. Stove Co. offers the UFB908, a universal filter box that mounts to the rear of the unit that your return air duct work will attach to. It uses a standard 16 x 20 x 1 filter (NOT INCLUDED) to reduce the amount of dust particles from being transfered thru you duct work system. DR-6 Barometric Damper Regulator In the unlikely event that your furnace “overfires” (a condition evidenced by elbows, stove pipes, and connectors glowing red in appearance or otherwise discoloring), then your installation is subject to excessive draft created by either a chimney too tall or too great in diameter in conjunction with its height, or some other factor of an indeterminate cause. In this event, you should install a barometric draft regulator. Such installation will preclude any over-firing and/or any hazardous consequences of potential overfiring. Barometric draft regulators are generally available where you purchased your stove or may be ordered directly from United States Stove Company at a nominal charge. 11DIKL UFB908DR-6 21 Bulletin rc454 A GUIDE TO BURNING COAL IN YOUR FURNACE Furnaces that are capable of burning coal usually will burn both Bituminous and Anthracite coal. Anthracite is perhaps the best coal fuel because of its long even burn time, high heat output, and cleanliness which make it a good choice for the home. However, keep in mind it is a much more difficult fuel to use, requires more care and patience, is not so widely available, and is usually much more expensive than Bituminous. SIZE OF COAL: Most sizes of Bituminous Coal will work in a coal furnace; for best results we recommend large “nut” coal to small “egg” coal (1-3/4” diameter to 4” diameter). When burning Anthracite, use “egg” or “broken” with sizes between 2-5/16” thru 4-3/8”. Note that it is important to the long life of your stove to buy coal which has been sized and cleaned. Cleaning insures removal of rocks and other minerals. Never use coal smaller than 1” or larger than 5” in diameter. Small sized coal will smother the fire. Too large a size of coal will not burn well. STOVE OPERATION: All coal fires should be started with wood which will allow the fire to get hot enough to ignite the coal. The best ignition fires utilize dry pine or other resinous soft woods as kindling, with hard wood (oak, hickory, ash) added to increase the heat prior to addition of the coal. Before starting the fire, open the stove pipe damper (if epuipped), turn the thermostat to high, open the ash pit door and feed door, place newspaper and finely split kindling on the grate, light the paper, add larger hard wood after the kindling is burning brightly. CAUTION: Never use gasoline, lantern fuel, kerosene, charcoal lighter fluid, or other flammable liquids to start or freshen up a fire in any heater. Place the larger pieces of wood on the fire so that they are slightly separated and form a level for the addition of coal. It will take 10 to 20 minutes before this wood is thoroughly ignited. Adding coal too soon will cut the air supply and smother the fire. BURNING BITUMINOUS: Once your kindling and wood fire has produced a bed of well established coals, start adding coal in layers allowing each to ignite before adding more. Bituminous has a high volatile content and, as a re sult, should be fired with the “conical method” - with the highest portion of your fire bed in the center of the firebox. The first flames will be long and generally orange or yellow and produce quite a bit of smoke. As the gases burn off the flames become shorter, change color and produce less smoke. Once the fire is WELL ESTABLISHED add coal to the center of the firebox forming the cone. Burning in this fashion allows heat to drive off the volatile gases, and turbulence created increases the burn efficiency. There will have to be some experimenting with the individual setup as no two chimney’s or installations are going to be the same. Just remember to allow enough air to enter the firebox and keep the stove pipe damper open so that volatiles are properly burned. Before refueling, take the time to break up the cone a little with a poker, especially if it has caked over or formed a crust. But, be careful not to mix the coal as this increases the chances of forming clinkers. When shaking the grate(s) be gentle. Just a few short movements -a couple of “cranks” - is better than a lot of agitation. The objective is to remove a small amount of the ashes without disturbing the fire. Stop when you see a glow in the ashes or the first red coals fall into the ash pan. Excessive shaking wastes fuel and can expose the grate(s) to very high temperatures which can cause warpage or burnout...
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