Inspecting Burners - Desa LMFP33NR Owner's Operation And Installation Manual

INSPECTING BURNERS

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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
Figure 38 shows a correct pilot flame pattern. Figure 39 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 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.
Pilot Burner
Thermocouple
Pilot Burner
Propane/LP Gas Pilot
Figure 38 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Propane/LP 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.
For more information, visit www.desatech.com
For more information, visit www.desatech.com
Thermocouple
Natural Gas Pilot
Pilot Burner
Thermocouple
Natural Gas Pilot
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
Figure 41 - Incorrect Burner Flame Pattern
Yellow Tipping
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