Finalizing The Installation; Flame Appearance; To Adjust Venturi - kozy heat Lakefield 56150 Installation Manual

FINALIZING THE INSTALLATION

FLAME APPEARANCE:

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 fireplace is first lit, the flames will be blue, gradually turning yellowish-orange during 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.
Correct pilot flame
Figure 15a
WARNING Burner tube adjustable venturi positioning should only be performed by a qualified professional service technician.
FACTORY SET BURNER TUBE VENTURI SETTINGS
(ADJUST AS NECESSARY FOR YOUR INSTALLATION)
NATURAL GAS
3/16" (5mm) OPEN
VENTURI POSITION
Closed too far
Open too far
NOTE If soot is present, check log positioning before adjusting burner venturi. Logs must not block burner ports.
SLIGHT ADJUSTMENTS TO THE BURNER VENTURI OPENING CREATE DRAMATIC RESULTS. ADJUST AT SLIGHT INCREMENTS
IMPORTANT
UNTIL DESIRED LOOK IS ACHIEVED. ALWAYS BURN FIREPLACE FOR AT LEAST 15 MINUTES AND ALLOW TIME TO COOL
BEFORE MAKING ANY FURTHER ADJUSTMENTS.

TO ADJUST VENTURI:

1. Remove glass frame assembly. Page 7.
2. Remove log set.
3. Remove burner assembly. Refer to page 14.
4. Loosen screw on burner venturi and adjust as necessary. Tighten screw.
5. Reinstall all components previously removed.
6. Light fireplace and wait 15 minutes before determining if any further adjustments are
needed.
Figure 15b
LP (PROPANE) GAS
5/8" (16mm) OPEN
BURNER TUBE VENTURI ADJUSTMENT GUIDELINES
FLAME COLOR
Dark orange flame with black tips
Blue flames
Lazy yellow flames - ideal
Dark orange flames / black tips
Venturi closed too far
Excessive burner media
Open venturi setting slightly
Close venturi setting slightly
Figure 15c
15
Short blue flames
venturi open too far
Lifting (ghosting) flames
Improper Venting
Gas pressure too high
VENTURI ADJUSTMENT
BURNER VENTURI