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Figure 41 - Correct
Pilot Flame Pattern
Pilot Burner
Figure 42 - Incorrect
Pilot Flame Pattern
Pilot
Burner
Thermocouple
(Pilot May Vary From Ones Shown)
Figure 43 - Correct Burner Flame Pattern
Figure 44 - Incorrect Burner Flame
Pattern
Yellow Tipping
At Top of Blue
Flame
INSPECTING BURNERS
Check pilot ame pattern and burner ame
patterns often.
PILOT FLAME PATTERN
Figure 41 shows a correct pilot ame pattern.
Figure 42 shows an incorrect pilot ame pat-
tern. The incorrect pilot ame is not touching
the thermocouple. This will cause the thermo-
couple to cool. When the thermocouple cools,
the replace will shut down.
If pilot ame pattern is incorrect, as shown
in Figure 42
• turn replace off (see To Turn Off Gas to
Appliance, page 21)
• see Troubleshooting, page 26
Note: The correct pilot ame on natural gas
units will have a slight curve, but ame should
be blue and have no yellow or orange color.
MAIN BURNER
Periodically inspect all burner ame holes with
the heater running. All slotted burner ame
holes should be open with yellow ame pres-
ent. All round burner ame holes should be
open with a small blue ame present. Some
burner flame holes may become blocked
by debris or rust, with no ame present. If
so, turn off heater and let cool. Remove
blockage. Blocked burner ame holes may
create soot.
FRONT BURNER FLAME PATTERN
Figure 43 shows correct front burner ame
pattern. Figure 44 shows incorrect front
burner ame pattern. The incorrect burner
ame pattern shows yellow tipping at top of
blue ame.
If front burner ame pattern is incorrect, as
shown in Figure 44
• turn replace off (see To Turn Off Gas to
Appliance, page 21)
• see Troubleshooting, page 26