Jotul GI 425 DV - Manual (Page 23)

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Figure 26. Proper flame pattern.
Air Shutter Adjustment
1. Open the Lower Grill panel and locate the Air
Shutter adjustment stem extending down from
the firebox floor. See fig. 27.
2. Loosen the wingnut and pull the stem to the
forward to open the air inlet and allow more air
into the burner. Make adjustments in 1/8” (3
mm) increments.
Allow the fireplace to burn 15 -20 minutes on the
HIGH setting, observing the flame continuously.
4. If the flame appears weak, slow, or sooty, move
the shutter back further and repeat the process
until the flame is as desired. Retighten the
wingnut.
Air Inlet Settings
Natural Gas - 1/4” open
Propane - 1/2” open
IMPORTANT: Run the fireplace for a minimum
of 15 to 20 minutes to produce an accurate
representation of the flame appearance. This
warm-up should be done before and between
any air shutter adjustment.
Variable Vent Restriction
You may find it necessary to restrict the vent to
some degree to accommodate the characteristics of
your individual installation. Generally, the taller the
vent height, the more likely may be the need to
restrict air intake to achieve the desired flame
picture and/or heat output. Vent restriction is
accomplished by a single panel that slides over the
combustion air intake port located at the right rear
of the firebox. The Air Intake Restrictor Plate is set in
the fully open position at the factory. The panel can
be adjusted while the burner is operating.
1. Locate the adjustment stem (see fig. 28) and
loosen the wingnut.
2. With the burner operating, move the stem to the
right in 1/4” increments until the desired flame
picture or heat output is achieved. After each
adjustment, wait a few minutes to allow the
burner to settle in to the new air flow before
making further adjustment.
3. When the desired result is achieved, retighten the
wingnut.
Figure 27. Air Shutter Adjustment. Figure 28. Air Inlet Restriction Adjustment
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Air Shutter Stem
Restrictor Plate Stem