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OPERATION
BURNER FLAME PATTERN
Fig. 28 shows a correct burner flame pattern. Fig. 29 shows an incorrect burner flame pattern with
lifting, and excessive flame height.
If burner flame is incorrect:
• turn heater off (see "To Turn Off Gas to Appliance", page 19).
• see Troubleshooting, pages 23 through 26.
Fig. 28 - Correct/Normal Flame Pattern
with short flames with Control Knob Set
to High Flame (5)
The upper third of flame
may be bright yellow when
operated on propane.
NOTE: Ambient flame burners produce both a blue and yellow flame. An excessively high yellow
colored flame may be caused by airborne dust, dander, pet hair, etc. Additionally, an excess
amount of Mercaptane in the fuel can result in an orange or yellow colored flame.
When this heater is set for use on propane gas, the upper one third of the flame may be bright yellow.
When this heater is set for use on natural gas, a slight yellow tipping of the flame may occur.
Fig. 29 - Incorrect/Abnormal Flame Pat-
tern with tall flames with Control Knob
Set to High Flame (5)
1/2 Glass
Height
21
1/2 Glass
Height
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