INSPECTING BURNER
Check pilot flame pattern and burner flame pat- terns often.
PILOT FLAME PATTERN
Figure 44 shows a correct pilot flame pattern. Figure 45 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 45
•turn heater off (see To Turn Off Gas to Appli- ance, page 21)
•see Troubleshooting, page 25
Note: The pilot flame on a natural gas units will have a slight curve, but flame should be blue and have no yellow or orange color.
Thermocouple
Pilot Burner
BURNER FLAME PATTERN
WARNING: If yellow tipping occurs, your fireplace could pro- duce increased levels of carbon monoxide.
NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles enter the fireplace and burn causing brief patches of orange flame.
Figure 46 shows a correct burner flame pattern. Figure 47 shows an incorrect burner flame pat- tern. The incorrect burner flame pattern shows the flame higher consistently higher than 1 inch above the logs.
If burner flame pattern is incorrect, as shown in Figure 47
•turn heater off (see To Turn Off Gas To Appli- ance, page 21)
•see Troubleshooting, page 25
Figure 44 - Correct Pilot Flame Pattern
(Natural Gas Pilot Shown)
Pilot Burner
Thermocouple
Figure 46 - Correct Burner Flame Pattern
Yellow Tipping
Figure 45 - Incorrect Pilot Flame Pattern
(Natural Gas Pilot Shown)
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 fireplace 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 fireplace and let cool. Remove blockage. Blocked burner flame holes will create soot.
Figure 47 - Incorrect Burner Flame Pattern
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