Burner Flame Adjustments - kozy heat CHASKA 29-ROCK 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 lame appearance and characteristics are afected by
altitude, fuel quality, venting coniguration, and other factors. After
installation, this appliance may need additional adjustments to
achieve optimum lame 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 irst lit, the burner lames will appear blue.
During the irst 15 minutes of operation, lame appearance will
gradually turn to the desired yellow appearance. If the lames
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 lame, but may produce soot on the
glass. Opening the air shutter will cause a short, blue lame that
may lift of the burner.
Table 12.3, Factory Set Venturi Openings
Fuel Air Shutter Opening
Natural Gas
LP Gas
12.2.1.1 Venturi Adjustment
NOTE: If soot is present on the glass, check rock positioning
before adjusting the venturi. Rocks must not block burner ports.
1. Remove the safety barrier and glass frame assembly.
2. Remove the rock set and burner assembly from irebox.
3. Loosen screw on venturi and adjust as necessary. Re-tighten
screw.
4. Reinstall all components previously removed
BURNER VENTURI
Figure 12.3, Burner Venturi Location
32 ADJUSTMENT
IMPORTANT: Slight adjustments to the venturi opening will
create dramatic results. Adjust at slight increments until desired
look is achieved. Always burn the fireplace insert for at least 15
minutes, and allow the appliance ample time to cool before
making any further adjustments.
Flame
Characteristic
Dark, orange lame
with black tips
Short, blue lames
Lifting (ghosting)
lames
1/8" (3 mm) OPEN
5/8" (15 mm) OPEN
Figure 12.2, 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 FLAMES
WITH BLACK TIPS
SHORT, BLUE FLAMES
LIFTING (GHOSTING) FLAMES
Solution
Open venturi slightly
Close setting slightly
Check manometer
settings
Open venturi setting
slightly