www.fmiproducts.com
121308-01F
24
INSPECTING bURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 43 shows a correct pilot flame pattern.
Figure 44 shows an incorrect pilot flame pat
-
tern. The incorrect pilot flame is not properly
heating the thermocouple. When the thermo-
couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 44
• turn heater off (see
To Turn Off Gas to Ap-
pliance
, page 21)
• see
Troubleshooting
, page 26
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.
Figure 43 - Correct Pilot Flame Pattern
Figure 44 - Incorrect Pilot Flame Pattern
Thermocouple
Pilot
Burner
Thermocouple
Pilot
Burner
Thermocouple
Natural Gas
Pilot
Propane/LP
Gas Pilot
Natural
Gas Pilot
Propane/LP
Gas Pilot
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 block-
age and clean if needed. Blocked air holes
will create soot.
Figure 45 - Correct Burner Flame Pattern
Yellow Tipping
Figure 46 - Incorrect Burner Flame Pattern
Thermocouple
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 fire
-
place 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 45 shows a correct burner flame pattern.
Figure 46 shows an incorrect burner flame pat
-
tern. The incorrect burner flame pattern shows
the flame consistently higher than 1 inch above
the logs.
If burner flame pattern is incorrect, as shown
in Figure 46
• turn heater off (see
To Turn Off Gas To
Appliance
, page 21)
• see
Troubleshooting
, page 26
