Finalizing The Installation; Flame Appearance; Venturi Adjustment - kozy heat 911XL 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. Flames will gradually turn 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 17a
FACTORY SET BURNER TUBE VENTURI SETTINGS
(ADJUST AS NECESSARY FOR YOUR INSTALLATION)
NATURAL GAS
1/4" (6mm) 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.
SL I G HT AD J U STM EN T S T O BU R N ER VE N TU RI OP EN IN G CR E A TE D R AM A TI C R E SU LT S. A D J U ST AT SL I G HT
IMPORTANT
INCREM ENT S UNTIL DESI RED LOOK IS ACHI EVED. AL WAY S BURN FIREPLAC E FOR AT LEAST 15 M INUTES
AND ALLOW TIME TO COOL BEFORE MAKING ANY FURTHER ADJUSTMENTS.
TO ADJUST VENTURI:
1. Remove glass frame assembly.
2. Remove log set.
3. Remove burner assembly.
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 17b
LP (PROPANE) GAS
5/8" (16mm)
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
17
Short blue flames
venturi open too far
Lifting (ghosting) flames
Improper Venting
Gas pressure too high

VENTURI ADJUSTMENT

BURNER VENTURI
Figure 17c