Inspecting Burner
Pilot Assembly Adjustment
The pilot assembly is factory preset for the proper flame height. Alteration to factory settings may have occurred during shipping. If this is the case, some minor readjustments may be necessary and should be done by a qualified technician.
The pilot assembly is located behind the burner next to the rear refractory piece at the
| Ignitor |
| 3/8" to 1/2" |
1/8" (3 mm) | (10 mm - 13 mm) |
Pilot Burner
Thermopile
Figure 23 - Correct Pilot Flame Pattern
Millivolt Assembly
Pilot 1/8" to 1/4" | Flame |
Burner | Sensor |
| 3/8" to 1/2" |
Pan |
|
Burner | Ignitor |
|
Figure 24 - Correct Pilot Flame Pattern
Electronic Assembly
Burner Flame Adjustment
The air shutter, located at the base of the main burner tube, has been factory preset to the proper air to gas ratio which results in an even, clean burn- ing flame across the burner (see Figure 25).
If readjustment is necessary, you can restore proper flame setting by loosening air shutter screw and rotate air shutter until proper flame setting is achieved (shutters normal setting is fully opened). Retighten air shutter screw. See Figure 26 for air shutter location.
CAUTION: Make certain ori- fice is fully inside venturi tube’s air shutter and that air shutter is adjusted accordingly.
CORRECT
LONG, BLUE FLAME
WITH YELLOW TIPS
INCORRECT CLOSE
SHUTTER
SHORT, SHARP
BLOWING FLAME
INCORRECT OPEN SHUTTER
LONG, UNEVEN
YELLOW FLAME
Figure 25 - Burner Flame Patterns
Burner Pan
Air Shutter
Screw
Orifice 
Gas Valve 
Figure 26 - Air Shutter Adjustment
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