Flame Picture Adjustment - Jøtul GF 500 DV Portland Installation And Operation Manual

Flame Appearance / Air Shutter
Adjustment
The GF 500 DV gas stove is shipped from the factory
equipped to burn Natural gas and the air inlet shutters
have been set to provide optimal combustion efficiency
under a variety of venting configurations. The air shutters
may be adjusted, however, to accommodate the conditions
of your individual installation and to provide the best
flame picture. Other installation related variables can also
affect the flame picture.
Too large an air setting - the appliance will generate a
flame that is blue and transparent, or an "anemic" flame.
Too small an air setting - the appliance will generate
very long yellow flames resulting in soot. Sooting
produces black deposits on the logs, on the inside walls of
the appliance, and potentially on the exterior termination
cap. Sooting is caused by incomplete combustion in the
flames and lack of combustion air entering the air shutter
opening.
WARNING: AIR SHUTTER ADJUSTMENTS SHOULD ONLY
BE PERFORMED BY A QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.
To adjust the air shutters:
1. Reach under the stove and loosen the Air Shutter wing
nuts. The RIGHT shutter controls the REAR Burner. The
LEFT shutter controls the FRONT Burner. See fig. 50. Slide
the wing nut stems forward toward yourself to open
the air shutters and back to provide less air. Before
making any adjustments, start at the factory shutter
settings:
• Natural Gas - open 1/16" (1.5 mm)
• Propane - open 1/8" (3 mm)
2. Allow the stove to settle into a steady state by burning
for 20-30 minutes on the HIGH setting, observing
the flame continuously. If the flame appears weak,
slow, or sooty, increase the air shutter opening in 1/16"
increments until the desired flame picture is achieved.
After each small adjustment, allow the burner to settle
in again before making further adjustment.
3. Tighten the wing nuts to secure each shutter at the
desired setting.
Air Shutter Stems
Figure 50.
Pull the shutter forward to increase primary air.
Push back to restrict air.
Figure 51. Proper pilot flame appearance relative to burner
carry-over porting.
Figure 52. Steady state flame pattern - High setting.
139760_A GF 500 DV Oct. 2017
27