CFM BC Series Homeowner's Manual page 9

Please note that under moderate firing, some discolor-
ation may occur on brass door frames. Keeping the fire
small and toward the back of the fireplace will prevent
this discoloration.
7. Operating Fan
If your fireplace is heat-circulating with a fan option,
build the fire in the normal manner with the fan(s) 'OFF'.
Preheat your firebox and heat exchanger system for 20
- 30 minutes. After a good fire has developed, turn the
fan switch to the 'ON' position and heated air will imme-
diately flow from the grille.
8. Tending the Fire
The heat output of a fireplace depends on how well
you build and tend the fire. A well-tended fire assures a
constant heat output. Keep the fire burning at a con-
stant level by adding additional logs as necessary. Use
a poker to push the burning logs together into a tight
group at the back of the fireplace each time you add
new logs. Keep the bed of hot ashes located directly
under the logs. This aids in maintaining the fire, but do
not let the ashes get so deep that they interfere with
adequate air flow up through the logs.
Except when adding logs to the fire, the firescreen
should always be kept closed whenever there is a fire
burning in the firebox.
9. At the End of the Day
If your fire has not burned itself out by bedtime, you
may wish to use your tongs to stand any burning logs
on end in the corners of the firebox. In this position,
they usually will quickly burn out and will provide good
base for your next fire. Be sure the firescreen or glass
doors are kept closed and the damper kept open until
the fire is completely out.
10. Disposal of Ashes
Clean the ashes from the firebox before starting each
fire. Ashes should be placed in a metal container with
a tight fitting lid. The closed container of ashes should
be placed on a noncombustible floor or on the ground,
well away from all combustible material, pending final
disposal. If the ashes are disposed of by burial in soil
or otherwise locally dispersed, they should be retained
in the closed container until all cinders have thoroughly
cooled.
Leave only enough ashes to insulate the cold hearth so
the fire will start faster. Excessive ash levels will slow
the burning of your fire and cause your grate to burn out
quickly.
11. Operation of BFC36, Clean-Burning Fireplace
The BFC36 fireplaces have been designed specifically
to reduce smoke and hydrocarbon emissions; however,
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the performance of these fireplaces depends on proper
operation. In order to reduce emissions use only well
seasoned firewood. Avoid slow burning smoldering
fires and maintain a hot coal bed on which to place new
wood.
High firebox temeratures help to ensure effective opera-
tion of these clean-burning models.
The BFC36 clean-burning fireplaces must be burned
with the cabinet doors fully closed in order to reduce
emissions. Any modifications to the internal compo-
nents of these fireplaces will likely cause an increase in
emissions. Always use the correct model grate and do
not remove any brick components, baffles or hardware
from the firebox.
12. Operation of EWF36A fireplace.
The EWF36A meets the US Environmental Protection
Agency's emission limts for wood heaters sold after
July 1, 1990.
The catalytic combustion system in your EWF produces
the best conditions for secondary combustion.
When the stove damper is closed, smoke goes through
the catalytic element, burning at temperatures of
500-600°F (260-315°C), half the temperature normally
needed for unaided secondary combustion.
The catalytic element is a ceramic "honeycomb" coated
with a noble metal, usually platinum. The element is in
the secondary combustion chamber, made of a spe-
cial high-temperature insulating refractory material.
The chamber provides the correct environment neces-
sary for secondary combustion of the fuel (smoke).
Closing the damper may also reduce draft. Closing
the damper too soon may put out the fire or deactivate
the combustor. Close the damper only when the fire is
well established. When starting a fire, wait until there is
an ember bed of at least 3-4 inches before closing the
damper.
13. Operation of EWF30
The EWF30 meets the US Environmental Protection
Agency's emission limits for wood heaters sold after
July 1, 1990.
The non-catalytic combustion system produces the
proper conditions for secondary combustion.
When the damper is closed, smoke goes through the
refractory combustion chamber at the back of the until.
Inside this chamber is where the secondary combustion
occurs.
Like the EWF36A, closing the damper too quickly is
detrimental to secondary combustion. When starting a
fire, wait until there is an ember bed of at least 3" - 4"
(76-102 mm) before closing the damper.
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