#NDK-
34-i R.1 July 2022
40
Hussong Mfg. Co., Inc. Kozy Heat Fireplaces
12.2 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.
12.2.1 Burner Venturis
WARNING: VENTURI ADJUSTMENT MUST BE DONE BY A QUALIFIED
SERVICE TECHNICIAN.
NOTE: Burner venturi air shutter settings have been factory set. Refer
to
TABLE 12.3
.
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.
12.2.2
Venturi Opening Adjustments
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, glass media,
and lava rock (if installed).
2.
Remove media tray.
3.
Loosen the screw on burner venturis and adjust as necessary.
Re-tighten screws.
4.
Reinstall all components previously removed.
T a b le
1 2 .3 , F a c to ry S e t V e n tu ri O p e n in g s
Natural Gas
Propane
Left & Right Burners
1/8” (3mm)
5/16” (8mm)
Rear Burner
5/8” (16mm)
5/8” (16mm)
Figure 12.3 Flame Appearance and Characteristics
Figure 12.2, Burner Venturis
T a b le
1 2 .4 , F la m e A p p e a r a n c e V e n tu ri A d ju stm e n t
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
ADJUSTMENT
