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#BAY-41-G R.9 Sept 2018
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
ADJUSTMENT
45
11.2 Flame Appearance Adjustments
WARNING: To avoid property damage or personal injury, allow the
fireplace ample time to cool before making any adjustments.
Burner flame appearance and characteristics are affected by
altitude, fuel quality, venting configuration, and other factors. After
installation, this appliance may need additional adjustments to
achieve optimum flame appearance and visual aesthetics.
11.2.1 Burner Venturi
WARNING: VENTURI ADJUSTMENT MUST BE DONE BY A QUALIFIED
SERVICE TECHNICIAN.
NOTE: Burner venturi air shutter settings have been factory set. Refer
to Table 11.3.
When this appliance is first lit, the burner flames will appear blue.
During the first 15 minutes of operation, flame appearance will
gradually turn to the desired yellow appearance. If the flames remain
blue, or become dark orange with evidence of sooting (black tips),
adjustment of the air shutter opening may be necessary.
Regardless of venturi orientation, closing the air shutter will achieve a
desired yellow flame, but may produce soot on the glass. Opening the
air shutter will cause a short, blue flame that may lift off the burner.
Table 11.3, Factory Set Venturi Openings
Fuel
Air Shutter Opening
Natural Gas
1/8 in (3 mm)
Propane
5/8 in (16 mm)
11.2.1.1 Venturi Adjustment
1. Remove the safety barrier, glass frame assembly, and glass
media.
2. Remove burner cover, burner, and burner venturi housing.
3. Loosen screw on burner venturi and adjust as necessary. Re-
tighten screw.
4. Reinstall all components previously removed.
IMPORTANT: Slight adjustments to the venturi opening will create
dramatic results. Adjust at slight increments until desired look is
achieved. Always burn the fireplace for at least 15 minutes, and always
allow the appliance ample time to cool before making any further
adjustments.
Table 11.4, Venturi Adjustment Guidelines
Flame Characteristic
Cause
Solution
Dark, orange flame
with black tips
Venturi closed too far
Open venturi slightly
Short, blue flames
Venturi open too far
Close setting slightly
Lifting (ghosting)
flames
Gas pressure too high
Venturi closed too far
Check manometer
settings
Open venturi setting
slightly
Figure 11.2, Burner Venturi
LAZY, YELLOW FLAMES
IDEAL
SHORT, BLUE FLAMES
DARK, ORANGE FLAMES
WITH BLACK TIPS
LIFTING (GHOSTING) FLAMES
Figure 11.3, Flame Appearance and Characteristics