Air Flow And Control; Break-In Procedure; Top-Down Fire Starting - Jøtul F 602 V2 Installation And Operating Instructions Manual

F 602 V2 3/20

5.4 Air Flow and Control

Your Jøtul F 602 V2 is designed to support efficient
combustion and heat transfer by directing air through the
stove in two separate channels; Primary and Secondary.
Primary air is manually regulated by a sliding valve located
in the load door under the glass pane which remains
slightly open. 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 that air inlet.
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 through a manifold at the back of the stove and
is then directed to the fire 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 20, page 15.
Using a Stove-top Thermometer
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 characteristics that will affect stove
performance. You should use a stove-top thermometer to
monitor the status of the fire. Once the temperature has
reached 400°F - 600°F, set the air control to a mid-range
position to allow adequate oxygen to support efficient
combustion throughout the burn cycle.
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5.5 New Stove Break-In Procedure
The Jøtul F 602 V2 is constructed of cast iron and stove furnace
cement. Cast iron, while very durable, expands and contracts as it
is heated and cooled. This type of construction requires the stove
to be "broken-in" gradually so that thermal expansion does not
occur too quickly. The following steps describe the proper break-in
procedure for the Jøtul F 602 V2:
1. Light a small fire of newspaper and kindling. Only allow the
stove to reach a maximum surface temperature of 200°F (93°
C). Burn for approximately 1 hour.
2. Allow the stove to cool to room temperature.
3. Light a second fire, allowing the stove to reach a maximum
temperature of 300°F (149°C) for 1 hour.
4. Cool the stove to room temperature.
5. Light a third fire and gradually allow the stove to reach a
surface temperature of 400°F (204°C).
6. Cool stove to room temperature. This completes the "break-in"
procedure.
Note: Keep the stove under 400°F (204°C) surface
temperature during any "break-in fire", with the exception
of the last "break-in" fire. If the temperature exceeds 400°F,
move the primary air control lever all the way to the left
to shut off the air supply completely. It is normal that the
stove top temperature will continue to climb until the fuel
burns down somewhat. Once the fire is out and the stove
has cooled to room temperature, continue the break-in
procedure. Never attempt to reduce the temperature by
removing burning logs from the fire.
NOTE: It is normal for a new, painted stove to emit an odor
and smoke during the first several fires. This is caused
by the seasoning of the high temperature paint and will
diminish with each fire. Opening a window or door to
provide additional ventilation will alleviate this condition.
5.6 Building a Fire
The most important element is seasoned, dry fuel. A well-built
fire will burn efficiently, keep the door glass clean, minimize
emissions, and require less time and attention to maintain.
We recommend using the top-down method of fire-starting
as that will quickly warm the flue and establish a strong
draft.
• Set the air control lever fully to the right (fully open).
Place two, quarter-split logs to either side of the firebox,
oriented front-to-back.
• Criss-cross three or four smaller splits on top of the
bottom logs.
• Criss-cross several thin, dry kindling sticks across the
second layer of logs.
• Place a few balls of crumpled paper on top of the
kindling, followed by a handful or two of logpile tinder.
• Ignite the paper evenly and close the door.
• The burning paper and tinder will fall and quickly ignite
the kindling. As the burning kindling sticks fall, the
second layer of logs will ignite and fall between the
base logs.