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INSPECTING BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 46 shows a correct pilot flame pattern.
Figure 47 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 47
• turn heater off (see
To Turn Off Gas to Ap-
pliance
, page 22)
• see
Troubleshooting
, page 33
Note: The pilot flame on natural gas units will
have a slight curve, but flame should be blue
and have no yellow or orange color.
Figure 46 - Correct Pilot Flame Pattern
Figure 47 - Incorrect Pilot Flame Pattern
MAIN BURNER
Periodically inspect all burner flame holes with
the heater running. All slotted burner flame
holes should be open with yellow flame pres-
ent. 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 heater and let cool. Remove blockage.
Blocked burner flame holes may create soot.
BURNER FLAME PATTERN
WARNING: If incorrect burner
flame pattern occurs your fireplace
could produce increased levels of
carbon monoxide.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt or
other fine particles are burned by
fireplace, causing brief patches of
orange flame.
Figure 48 shows the correct burner flame.
The front ember burner should have a small
blue flame. When the ember material is ap-
plied, the embers will glow red and the flame
may have a few small bright yellow tips less
than 1/2 inch in height.
The middle burner produces a blue flame
that impinges upon the ceramic ramp caus-
ing the ramp to glow red with an occasional
yellow streak.
The rear burner produces a bright yellow
flame with the base of the flame being blue.
Figure 49 shows the incorrect burner flame.
The front ember burner should not produce
yellow flames greater than 1/2" in height or
any dark yellow or orange flames.
The middle burner should not produce flame
that remains yellow or yellow flame that ex-
tends above the ceramic ramp.
The rear burner should not produce a dark
yellow / orange flame nor should it be absent
of blue color near the base of the flame next
to the shiny stainless steel burner..
If burner flame pattern is incorrect, as shown
in Figure 49.
• turn fireplace off (see
To Turn Off Gas to
Appliance
, page 22)
• see
Troubleshooting
, page 33
Figure 48 - Correct Burner Flame Pattern
Figure 49 - Incorrect Burner Flame Pattern
Yellow tipping
on ember
burner
Pilot Burner
Thermocouple
Thermocouple
Pilot Burner
Middle burner
flame should
be blue with
the ramp/
log glowing
orange/red
Bright yellow rear
burner flame;
flame will be blue
next to burner
Small blue
flame on
ember
burner with
no yellow
tipping
Dark orange rear
burner flame
Yellow or
dark orange
middle
burner flame
