F 500 V3 Oslo 4 / 20
10
• Burning of any of the materials listed above can result
in the release of toxic fumes, cause smoke, or render
the catalytic combustor permanently damaged and
ineffective.
• IT IS AGAINST FEDERAL REGLATIONS TO OPERATE
THIS WOOD HEATER IF THE CATALYTIC ELEMENT IS
DEACTIVATED OR REMOVED.
• 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: Prevent logs from resting directly on the glass
panel. Logs should be spaced off of the glass enough
to promote unrestricted air flow within the firebox.
5.4 F 500 V3 Control Functions
The F 500 V3 is designed to support efficient
combustion and optimal heat transfer by directing air
to the fire through two separate channels; Primary and
Secondary. See figure 11.
Primary Air is manually regulated by a lever- controlled
valve located at the front center of the stove, directly
below the door. See fig. 12. The lever 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 above the
front doors and create an ’air-wash” to help keep the
viewing glass clean.
Secondary air is automatically regulated to promote
combustion of volatile gas that would otherwise be
exhausted to the atmosphere unburned. The secondary
air inlet is located at the back of the stove where a
temperature-sensitive bimetal coil continuously varies
the volume of air introduced to fire. This air is preheated
as it passes over the back and top of the firebox, directed
to the secondary combustion baffle and delivered to
the catalytic combustor. The combustor maintains the
high temperatures necessary to burn volitile gas that
would otherwise pass unburned into the atomosphere.
When the combustor is functioning, no smoke will be
observed exiting the chimney. This is evidence that the
stove is operating in the so-called ”sweet-spot” wherein
optimum efficiency is realized.
Secondary air is always available to the secondary
combustion baffle and the catalytic combustor.
The automatic control valve funtions to provide
the appropriate amount of secondary air relative to
maintaining optimal clean combustion.
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 and thereby prolonging the fire at a lower
heat output. See figure 12.
Control Settings and Performance
Use the table below as a guide to achieve the best
performance from your stove.
Burn Rate Air Control Setting
Blower Speed
Low
Fully to the Left
Minimum
Med. Low
1/4” to the Right
Minimum
Med. High
3/8” to the Right
Medium
High
Fully to the Right High
The valve lever should be set at Full Open (Right) for the
first five minutes of the Low, Medium Low and Medium
High burn rate.
5.5 Using the Combustor Monitor
Determining the primary air setting for the best
overall performance for your particular needs and
installation will be established over time through
trial and error. Each installation has unique physical
and environmental characteristics that will affect
stove performance. Other variables affecting
combustion efficiency are cordwood species and
moisture content. Taking those variables into
consideration, you should use the integrated
Combustor Monitor to maintain the fire in the most
efficient manner tailored to your specific needs and
installation configuration.
You can readily monitor combustion efficiency by
noting the temperature indicated on the thermometer
shown in figure 13a. Follow this procedure to install the
thermometer:
1. Remove the lower set screw on the right side panel of
stove using a 3mm hex key as shown in fig. 13b. DO
NOT REMOVE SET SCREW FOR TOP PLATE.
