Millivolt Appliance Checkout
The pilot flame should be steady, not lifting or floating. Flame should be blue in color with traces of orange at the outer edge.
The top ³⁄₈" (9 mm) at the pilot generator (thermopile) should be engulfed in the pilot flame. The flame should project 1" (25 mm) beyond the hood at all three ports (Figure 22 ).
Hood | Ignitor Rod |
³⁄₈" Min (9 mm)
Pilot
Nozzels
Figure 22
Replace the front log if removed for pilot inspection.
To light the burner; turn “ON” the remote wall switch and rotate the gas valve control knob counterclockwise to the “ON” position (“ON” will be to the left hand side of the valve).
Electronic Appliance Checkout
To light the burner, turn ‘ON’ the optional remote wall switch and turn the gas control switch to the “ON” position. Ensure the ignitor lights the pilot. The pilot flame should engulf the flame rod as shown in Figure 23.
10
3/8 To 1/2 Inch
(9 mm to 13 mm)
Proper Flame
Adjustment
Ground
Electrode
Flame Rod
Hot Surface
Igniter
Figure 23
Step 10. Adjustments – The following paragraphs address adjustment concerns and pro- cedures.
Flame Appearance and Sooting
Proper flame appearance is a matter of taste. Generally most people prefer the warm glow of a yellow to orange flame. Appliances operated with air shutter openings that are too large, or with long vertical vent runs, will exhibit flames that are blue and transparent. These weak, blue and transparent flames are termed anemic.
If the air shutter opening is too small sooting may develop. Sooting is indicated by black puffs developing at the tips of very long orange flames. Sooting results in black deposits forming on the logs, appliance inside surfaces and on exterior surfaces adjacent to the vent termi- nation. Sooting is caused by incomplete combustion in the flames and a lack of combustion air entering the air shutter opening.
To achieve a warm yellow to orange flame with an orange body that does not soot, the shutter opening must be adjusted between these two extremes.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
No smoke or soot should be present. If sooting conditions exist, the air shutter opening on the main burner can be adjusted. Normally, the more offsets in the vent system, the greater the need for the air shutter to be opened further.
WARNING: AIR SHUTTER ADJUSTMENT SHOULD ONLY BE PERFORMED BY A QUALIFIED PROFESSIONAL SERVICE TECHNICIAN.
Adjustment
To adjust the flame, position the air shutter to the nominal setting (Figure 24 ). Allow the burner to operate for at least 30 minutes. Observe the flame continuously. If it appears weak or sooty as previously described, adjust the air shutter open or closed until desired effect is achieved.
| Burner Tube |
Air Shutter |
|
Orifice | Adjusting |
Set Screw |
Nominal Air Shutter Settings
Natural Gas - ¹⁄₁₆" (1.59 mm) Open
Propane Gas - ¹⁄₄" (6.35 mm) Open
Figure 24
When satisfied that the appliance operates prop- erly, proceed to finish the installation. Leave the control knob/lever in “ON” position and turn the remote switch “OFF.” Replace the refractory access panel.