Filter
Top Products
operating instructions
18
Your Clayton Furnace is capable of burning Wood or Coal.
WOOD BURNING: (1)use Hardwood, 18" to 26", split and air dried (seasoned) for six months. (2) set thermostat
to "HIGH" before opening feed door. (3) add wood to a convenient level.
BURNING COAL: Clayton Furnaces are capable of burning Bituminous coal and Anthracite coal. Anthracite is
perhaps the best coal fuel because its long even burn time, high heat output, and cleanliness 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 the Clayton 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.
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
result, should be fired with the "conical method" - with the highest portion of your firebed 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 secondary 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.
For overnight operation (long duration burn time) shake the fire and add coal, retaining the center cone. Once the
volatiles are burned off, close the feed door and adjust the stove pipe damper. Then adjust the thermostat to the
desired heat level.
More MAINTENANCE will be need with bituminous than with anthracite coal as more soot will collect on heating
surfaces and in pipes, requiring more frequent cleaning.
ANTHRACITE: Before starting the fire open - the stove pipe damper, turn the automatic 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.