INSPECTING BURNERS
Pilot Flame Pattern
Burner Flame Pattern
Burner Primary Air Holes
Main Burner
19
INSPECTING BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 37 shows a correct pilot flame pattern. Figure 38 shows an incorrect pilot flame pattern. The incorrect pilot flame is not properly heating the thermocouple. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 38
•turn heater off (see To Turn Off Gas to Appliance, page 17)
•see Troubleshooting, pages 22 through 24
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 | Pilot Burner | Thermocouple |
|
| |
| Thermocouple |
|
Natural Gas
Propane/LP Gas
Figure 37 - Correct Pilot Flame Pattern
BURNER FLAME PATTERN
Figure 39 shows a correct burner flame pattern. Figure 40 shows an incorrect burner flame pattern. If burner flame pattern is incorrect,
•turn heater off (see To Turn Off Gas to Appliance, page 17)
•see Troubleshooting, pages 22 through 24
Approx.
Above Top of
Logs
Figure 39 - Correct Flame Pattern with Control Knob Set to High Flame.
More Than
8" Above
Top of Logs
Pilot Burner | Pilot Burner |
|
| Thermocouple | Thermocouple |
Natural Gas
Propane/LP Gas
Figure 38 - Incorrect Pilot Flame Pattern
Figure 40 - Incorrect Flame Pattern with Control Knob Set to High Flame
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the fitting at the burner entrance. These holes may become blocked with dust or lint. Periodically inspect these holes for any blockage and clean if needed. Blocked air holes will create soot.
MAIN BURNER
Periodically inspect all burner flame holes with the heater running. All slotted burner flame holes should be open with yellow flame present. All round burner flame holes should be open with a small blue flame present. Some burner flame holes may become blocked by debris or rust, with no flame present. If so, turn off heater and let cool. Remove blockage, blocked burner flame holes will create soot.
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