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139681_R00 F 500 CB Oslo May, 2015
5.0 Operation
Please read the following section completely before building a
fire in your new Jøtul F 500 Oslo.
5.1 Combustion Efficiency
EPA qualified tested efficiency values are not currently available
for the F 500. The EPA default efficiency for non-catalytic wood
heaters is 63% per Federal Register 40 CFR Part 60,Subpart AAA.
There are,however,aspects of efficiency that you should be aware
of in order to get the most from your stove.
Operation habits and fuel moisture can have a significant effect
on efficiency. Poorly seasoned wood having a higher than
optimum moisture content, can reduce the amount of energy
transferred tothe living area as a result of the energy expended
to evaporate the excess fuel moisture in order for the wood
to burn. Operational aspects, such as not building a robust
kindling fire to readily ignite the larger fuel pieces, can result in
an inefficient smoldering fire. Additionally, most modern wood
heaters’optimum performance and efficiency are at the medium
to medium -low burn rates.
The location of the stove can have a significant effect on heating
efficiency, primarily in regards to distribution of the heat. For
example, a wood heater centrally located in the residence in an
open living area will likely provide better circulation of heat than
will a stove located in a room adjacent to the larger living area.
5.2 CO Emissions
EPA qualified tested carbon monoxide (CO) values ar not currently
available for the F 500 There are, however, aspects of CO that
you should know. Most all means of combustion produce CO,
including wood fires. Maintaining a well-established fire and
avoiding operation that produces a smoldering, smoky fire, will
greatly reduce CO levels.
It is highly recommended that a CO monitor (detector) be
installed in the same room as the stove. The monitor, however,
should be located as far away as possible from the stove to avoid
alert soundings when adding fuel to the fire.
5.3 Wood Fuel and Performance
The F 500 CB is designed to burn natural wood only. Higher
efficiencies and lower emissions generally result when burning
air-dried,seasoned hardwoods, as opposed to softwoods,green or
freshly cut hardwoods.Wood that has been air-dried for a period
of 6 to 14 months will provide the cleanest, most efficient heat.
Wood seasoned more than 2 years will burn too quickly to take
advantage of the stove’s low end efficiency strength.
A seasoned log will have check marks on the ends and be lighter
than an unseasoned log which will show little or no check marks.
We recommed using a moisture meter to determine the
moisture content of your wood. For purposes of home heating,
your fuel should have a moisture content between 12 - 20%.
Wood with higher moisture content will burn, however, very
inefficiently. Most of its heat value will be lost to driving water
out of the wood. Worse, that moisture will condense as creosote
in the relatively cool chimney flue, increasing the potential for
a chimney fire. Use of unseasoned wood defeats the purpose of
any modern wood-burning stove.
DO NOT BURN:
• Coal;
• Garbage;
• Synthetic fuel or logs;
• Material containg rubber, including tires;
• Material containing plastics;
• Waste petroleum products, asphalt products, paints,
paint thinners or solvents;
• Materials containing asbestos;
• Construction or demolitioin debris;
• Railroad ties or pressure-treated wood;
• Manure or animal remains;
• Salt water driftwood or other previously salt-water;
saturated materials;
• Unseasoned wood; or
• Paper products, cardboard, plywood, or particle board. (The
prohibition against burning these materials does not prohibit the
use of fire starters made from paper,cardboard,saw dust,wax or
similar substances for the purpose of starting a fire.)
The burning of any of these materials can result in the release of
toxic fumes, or render the heater ineffective and cause smoke.
Never use gasoline,gasoline-type lantern fuel,kerosene,charcoal
lighter fluid, or similar liquids to start or “freshen-up” the fire.
Always keep such liquids away from the heater at all times.
NOTE:Avoid letting logs rest directly on the glass panel.The logs
should be spaced off of the glass enough to allow for proper air
flow within the firebox.
5.4 Air Flow and Control
Your F 500 CB is designed to support efficient combustion
and heat transfer by directing air through the stove in two
separate channels; Primary and Secondary. See figure 11.
Primary air is manually regulated by a lever and valve at the front
of the stove.The valve position controls the volume of primary air
entering the firebox and thereby affects fire intensity, heat output
and burn time. Primary air is directed to the main body of the fire
through air ports at the front of the stove. Separate manifolds
at each side also deliver pre-heated primary air at top of front
plate to create an ’air-wash”to help keep the viewing glass clean.
Secondary air allows combustion of volatile gas and other by-
products of primary combustion that would otherwise enter
the atmosphere unburned. This unregulated air is preheated as
it passes over the back of the stove and through a stainless steel
manifold at the top of the firebox. This additional hot oxygen
allows any unburned gasses to be burned inside the stove. The
action of secondary combustion can be readily seen through the
viewing glass a slow, rolling flames suspended over the main
fuel bed and smaller jets of flame extending from the secondary
manifold ports. At the same time, no smoke will be observed
exiting the chimney.This is evidence that the stove is operating at
the so-called ”sweet-spot”wherein optimum efficiency is realized.
When first starting or reviving the fire: the primary control
lever should be set to the far right position, which permits the
maximum amount of air into the stove. The greater the amount
of air entering the stove, the hotter and faster the fire will burn.
Moving the lever to the left reduces the airflow into the stove
which prolongs the fire at a lower heat output. See figure 11.
