41
Table 18.1, Factory Set Burner Tube Venturi Settings
(adjust as necessary for your installation)
Natural Gas
LP (Propane) Gas
1/8 in. (3 mm) OPEN
5/8 in. (16 mm) OPEN
Flame appearance is affected by several factors; including altitude, venting configuration,
and fuel quality. Although the venturi setting has been factory set, adjustments may be
necessary for optimal performance and visual aesthetics.
When the fireplace is first lit, the flames will be blue. Flames will gradually turn yellowish-
orange during the first 15 minutes of operation. If flames remain blue, or become dark
orange with evidence of sooting (black tips), the burner tube venturi may need adjustment.
Table 18.2, Burner Tube Venturi Adjustment and Flame Appearance
Venturi Position
Flame Color
Venturi Adjustment
Closed too far
Dark orange flame with black tips
Open venturi setting slightly
Open too far
Blue flames
Close venturi setting slightly
WARNING
To avoid property damage or personal injury, allow the fireplace ample time to cool before making any adjustments.
IMPORTANT
Slight adjustments to 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 allow the appliance time to cool before making any further adjustments.
WARNING
Burner tube adjustable venturi positioning should only be performed by a qualified personal service technician.
Lazy yellow flames
Ideal
Short blue flames
Venturi open too far
Dark orange flames / black tips
Venturi closed too far
Excessive burner media
Lifting (ghosting) flames
Improper Venting
Gas pressure too high
Figure 18.1, Correct pilot flame
1. Remove glass frame assembly, glass media, burner venturi housing, burner cover and burner from the
fireplace.
2. Loosen burner venturi screw and make the adjustment, then retighten screw.
3. Re-install burner, making sure venturi is positioned over burner orifice. Re-install burner venturi
housing.
4. Reinstall burner cover, glass media, and glass frame assembly.
5. Light fireplace. Wait at least 15 minutes before determining if any further adjustments are necessary.
18.2 Burner Tube Venturi
18.0
FINALIZING THE INSTALLATION
18.1
Flame Appearance
Figure 18.2, Flame Appearance Troubleshooting
18.2.1
Venturi Adjustment
Figure 18.3,
Burner Venturi
