Inspecting Burners
Check pilot flame pattern and burner flame pat- terns often.
PILOT FLAME PATTERN
Figure 35 shows a correct pilot flame pattern. Figure 36 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 36
•turn heater off (see To Turn Off Gas to Appli- ance, page 21
•see Troubleshooting, page 25
Note: The pilot flame on natural gas units will have a slight curve, but flame should be blue and have no yellow or orange color.
Pilot Burner
Thermocouple
Figure 35 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Figure 36 - Incorrect Pilot Flame Pattern
FRONT BURNER FLAME PATTERN
Figure 36 shows correct front burner flame pat- tern. Figure 37 shows incorrect front burner flame pattern. The incorrect burner flame pattern shows yellow tipping at top of blue flame.
WARNING: If yellow tipping occurs, your heater could pro- duce increased levels of carbon monoxide. If front burner flame pattern shows yellow tipping, follow instructions at bottom of this page. Yellow flame on rear burner is normal.
NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles are burned by heater, causing brief patches of orange flame.
If front burner flame pattern is incorrect, as shown in Figure 37
•turn heater off (see To Turn Off Gas to Appli- ance, page 21)
•see Troubleshooting, page 25
Figure 37 - Correct Front Burner Flame
Pattern
Yellow Tipping At
Top of Blue Flame
Figure 38 - Incorrect Front Burner Flame
Pattern
Wiring Diagram
To
Thermopile
To AUTO/OFF/ON
Switch or Remote
Receiver
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