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INSPECTING BURNERS

Pilot Flame Pattern

Burner Primary Air Holes

Main Burner

Burner Flame Pattern

INSPECTING BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

Figure38 showsacorrectpilotflamepattern.Figure39 showsanincorrect 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 39

turn heater off (see To Turn Off Gas to Appliance, page 18)

see Troubleshooting, pages 22 through 24

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

 

Thermocouple

 

Pilot Burner

 

 

 

 

Propane/LP Gas Pilot

Natural Gas Pilot

Figure 38 - Correct Pilot Flame Pattern

 

Pilot Burner

Pilot Burner

Thermocouple

Thermocouple

 

 

 

Propane/LP Gas Pilot

Natural Gas Pilot

Figure 39 - Incorrect Pilot Flame Pattern

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 run- ning. 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.

BURNER FLAME PATTERN

WARNING: If yellow tipping occurs, your fireplace could produce 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 40 shows a correct burner flame pattern. Figure 41 shows an incorrect burner flame pattern. 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 41

turn heater off (see To Turn Off Gas To Appliance, page 18)

see Troubleshooting, pages 22 through 24

Figure 40 - Correct Burner Flame Pattern

Yellow Tipping

Figure 41 - Incorrect Burner Flame Pattern

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Desa LMFP33PR Inspecting Burners, Pilot Flame Pattern, Burner Primary AIR Holes, Main Burner, Burner Flame Pattern

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