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PILOT FLAME CHARACTERISTICS
Figure 35 shows a correct pilot flame pattern. The correct flame will be blue and will extend beyond the thermocouple and thermopile.
The flame will surround the thermocouple and thermopile just below the tip. A slight yellow flame may occur where the pilot flame and
main burner flame meet. Figure 36 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple or
thermopile. This will cause the thermocouple or thermopile to cool. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 36
•
See Troubleshooting, page 31.
MAIN BURNER FLAME CHARACTERISTICS
Figure 37 shows a correct main burner flame pattern. Figure 38
shows an incorrect main burner flame pattern.
Air Shutter Adjustment
An air shutter adjusting screw is located on the exterior, bottom of
the inner body. Screw air shutter adjusting screw IN to close air
shutter top (increase yellow flame). Screw air shutter adjusting
screw OUT to open air shutter top (decrease yellow flame).
If main burner flame pattern is incorrect, as shown in Figure 38
•
See Troubleshooting, page 31.
Cleaning and Maintenance / Main Burner
Warning: Turn off heater and let cool before cleaning.
After use, cleaning of the main burner may be required for the
proper flame. The main burner may be cleaned by applying air
pressure to the ports on the main burner.
Correct Main Burner Flame
Figure 37
Correct Pilot Flame Pattern
Figure 35
Incorrect Pilot Flame Pattern
Figure 36