PILOT FLAME CHARACTERISTICS
The correct flame will be almost horizontal, blue and will extend past the thermopile 1/4" (6mm). The flame will surround the thermopile just below the tip.
On propane
Natural gas pilots require adjusting when the inlet pressure is above 5" w.c. (1.25kPa) Turn adjustment screw clockwise to reduce flame.
Propane
Figure 11
MAIN BURNER FLAME CHARACTERISTICS
There will be a short blue inner flame with a much larger lighter blue secondary flame. The burner flame may have a yellow tip when hot. See the burner drawing showing the approximate heights of each part of the flame. Dust in the combustion air will produce an orange or red flame. Do not mistake the orange or red flame for an improper yellow flame. After use, cleaning may be required for the proper flame.
Figure 12
Primary Air Adjustment (Figure 13)
An air adjustment bolt is located on the chamber support bottom. The four inch (102mm) clearance between the furnace and the floor allows access to the air adjustment bolt. The air adjustment bolt is above the rectangular opening on the inner casing bottom.
On Propane gas, if a whistling noise (resonation) occurs, screw air adjustment bolt into the chamber support in order to reduce the amount of primary air. If the whistling noise (resonation) is not eliminated when the air adjustment bolt is screwed into the chamber support this may indicate the air adjustment bolt is misaligned. Grasp air adjustment bolt and pivot (push) air adjustment bolt away from yourself. Observe the main burner flame as you push air adjustment bolt and when the main burner flame begins to develop a yellow flame, you should stop pushing on the air adjustment bolt. Screw air adjustment bolt out of the chamber support until the yellow flame on the main burner is eliminated. The air adjustment bolt should now be properly aligned. The reduction in primary air will soften the main burner flame and will eliminate the whistling noise (resonation).
On Propane or Natural gas, if a yellow flame occurs, screw air adjustment bolt out of the chamber support but do not completely remove air adjustment bolt from chamber support.The repositioning of the air adjustment bolt will increase the amount of primary air. The increase in primary air will sharpen the main burner flame and will eliminate the yellow flame.
Figure 13
Page 13 |