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121353-01H22
Figure 28 - Correct Pilot Flame Pattern
(Propane/LP Pilot Shown)
Pilot Burner
Thermocouple
Pilot Burner
Thermocouple
Figure 29 - Incorrect Pilot Flame Pattern
(Propane/LP Pilot Shown)
Air is drawn into the burner through the holes
in the tting 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.
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 ame holes may become blocked by de-
bris or rust, with no ame present. If so, turn off
heater and let cool. Remove blockage, blocked
burner ame holes will create soot.
Figure 30 shows a correct burner ame pat-
tern. Figure 31 shows an incorrect burner
ame pattern.
If burner ame pattern is incorrect as shown
in Figure 31
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 20)
• see Troubleshooting, page 24
Figure 30 - Correct Flame Pattern
Figure 31 - Incorrect Flame Pattern
INSPECTING bURNERS
Check pilot ame pattern and burner ame
patterns often.
PILOT FLAME PATTERN
Figure 28 shows a correct pilot ame pattern.
Figure 29 shows an incorrect pilot ame pat-
tern. The incorrect pilot ame is not touching
the thermocouple. When the thermocouple
cools, the heater will shut down.
If pilot ame pattern is incorrect, as shown
in Figure 29
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 20)
• see Troubleshooting, page 24
Note: The pilot ame on natural gas units will
have a slight curve, but ame should be blue
and have no yellow or orange color.