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11.2 Flame Appearance Adjustment
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.
11.2.1.1 Venturi Opening Adjustment
IMPORTANT: Slight adjustments to the venturi opening will create
dramatic results. Adjust at slight increments until desired look is
achieved.
1.
Remove the safety barrier, glass frame assembly, and glass
media.
2.
Remove burner cover (14) screws.
3.
Loosen screw on venturis and adjust as necessary. Tighten screw.
4.
Reinstall all components previously removed.
Table 11.3, Factory Set Venturi Openings
Fuel
Center Burner Venturi
Natural Gas
Propane
CENTER BURNER VENTURI
SIDE BURNER VENTURIS
Figure 11.2, Burner Venturis Locations
44 ADJUSTMENT
Side Burner Venturis
1/8" (3 mm)
1/8" (3 mm)
5/8" (16 mm)
5/8" (16 mm)
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
Table 11.4, Flame Appearance Venturi Adjustment
Flame Characteristic
Dark, orange flame
Venturi closed too far
with black tips
Short, blue flames
Venturi open too far
Lifting (ghosting)
Gas pressure too high
flames
Venturi closed too far
Figure 11.3, Flame Appearance and Characteristics
Cause
Solution
Open venturi slightly
Close setting slightly
Check manometer
settings
Open venturi setting
slightly
#SLA-60 R.8 March 2022
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