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 small yellow tip when hot. 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.

On Propane gas, if a whistling noise (resonation) occurs screw
the orifice fitting toward the main burner in order to reduce the
amount of primary air. The reduction in primary air will soften the
main burner flame and will eliminate the whistling noise
(resonation).	Figure 10

On Propane or Natural gas, if a yellow flame occurs screw the orifice fitting away from the main burner in order to increase the amount of primary air. The increase in primary air will sharpen the main burner flame and will eliminate the yellow flame.

After use, cleaning of the main burner may be required for the proper flame. The main burner may be cleaned by forcing water into the ports and the throat of the burner. The burner should be blown dry or heated to remove all water before replacing. To remove main burner, see Appliance Maintenance.

PILOT FLAME CHARACTERISTICS

The correct flame will be blue and will extend beyond the thermocouple. The flame will surround the thermocouple just below the tip. A slight yellow flame may occur where the pilot flame and main burner flame meet.

Figure 11

Oxygen Depletion Sensor Pilot (Figure 12)

If necessary, clean the Oxygen Depletion Sensor as follows:

1.Remove pilot shield which is attached to glass frame.

2.When large yellow tip flames are present, clean the ODS pilot by loosening nut B from the pilot tubing. When this procedure is required, grasp nut A with an open wrench.

3.Blow air pressure through the holes. This will blow out foreign materials such as dust. Tighten nut B also by grasping nut A.

Figure 12

Warning:

Never use needles, wires, or similar cylindrical objects to clean the pilot to avoid damaging the calibrated ruby that controls the gas flow.

R-2688

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EE-25-2 specifications

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