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

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 properly heating
the thermocouple. 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 20)
• see Troubleshooting, page 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
Propane/LP Gas Pilot
Pilot Burner
Natural Gas Pilot
Figure 35 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Propane/LP Gas Pilot
Pilot Burner
Natural Gas Pilot
Figure 36 - Incorrect Pilot Flame Pattern
22
Pilot Burner
Thermocouple
Thermocouple
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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.
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 37 shows a correct burner flame pattern. Fig-
ure 38 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 38
• turn heater off (see To Turn Off Gas To Appli-
ance, page 20)
• see Troubleshooting, page 24
Figure 37 - Correct Burner Flame Pattern
Yellow Tipping
Figure 38 - Incorrect Burner Flame Pattern
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