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110148-01C
For more information, visit www.desatech.com
For more information, visit www.desatech.com
21
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INSPECTING BURNERS
Pilot Flame Pattern
Burner Primary Air Holes
Main Burner
Burner Flame Pattern
Figure 44 - Correct Pilot Flame Pattern
Figure 45 - Incorrect Pilot Flame Pattern
Check pilot flame pattern and burner flame patterns 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 Appliance, page 19)
•
see Troubleshooting, pages 23 through 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.
INSPECTING BURNERS
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.
Pilot Burner
Thermocouple
Thermocouple
Pilot Burner
Thermocouple
Pilot Burner
Thermocouple
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.
WARNING: If yellow tipping occurs, your fireplace
could produce increased levels of carbon monoxide.
BURNER FLAME PATTERN
Figure 46 shows a correct burner flame pattern. Figure 47 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 47
• turn heater off (see To Turn Off Gas To Appliance, page 19)
• see Troubleshooting, pages 23 through 25
Figure 46 - Correct Burner Flame Pattern
Yellow Tipping
Figure 47 - Incorrect Burner Flame Pattern
Pilot Burner
Natural Gas PilotPropane/LP Gas Pilot
Natural Gas PilotPropane/LP Gas Pilot