Burner Flame Adjustments; Venturi Adjustment - kozy heat CSK-29-G Installation And Operation Manual

12.2 Burner Flame 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.
12.2.1 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 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.
Table 12.3, Factory Set Venturi Openings
Fuel Air Shutter Opening
Natural Gas
LP Gas

12.2.1.1 Venturi Adjustment

1. Remove the safety barrier, glass frame assembly, and glass
media.
2. Remove burner cover and burner tube.
3. Loosen screw on burner venturi and adjust as necessary. Re-
tighten screw.
4. Reinstall all components previously removed.
BURNER
VENTURI
Figure 12.2, Burner Venturi
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.
Flame
Characteristic
Dark, orange flame
with black tips
Short, blue flames
Lifting (ghosting)
flames
1/8" (3 mm) OPEN
5/8" (15 mm) OPEN
Figure 12.3, Flame Appearance and Characteristics
Table 12.4, Venturi Adjustment Guidelines
Cause
Venturi closed too far
Venturi open too far
Gas pressure too
high
Venturi closed too far
IDEAL
LAZY, YELLOW FLAMES
DARK, ORANGE FLAME
WITH BLACK TIPS
SHORT, BLUE FLAMES
LIFTING (GHOSTING) FLAMES
Solution
Open venturi slightly
Close setting slightly
Check manometer
settings
Open venturi setting
slightly
ADJUSTMENT 31