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121255-01A
16
INSPECTING HEATER
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 22 shows a correct pilot flame pattern.
Figure 23 shows an incorrect pilot flame pat
-
tern. The incorrect pilot flame is not touching
the thermocouple. This will cause the thermo
-
couple to cool. When the thermocouple cools,
the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 23
• turn heater off (see
To Turn Off Gas to Ap-
pliance,
page 15)
• see
Troubleshooting
, page 18
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.
BURNER FLAME PATTERN
Figure 24 shows a correct burner flame pat
-
tern. Figure 25 shows an incorrect burner
flame pattern.
If burner flame pattern is incorrect, as shown
in Figure 25
• turn heater off (see
To Turn Off Gas to Ap-
pliance,
page 15)
• see
Troubleshooting
, page 18
Thermocouple
Pilot Burner
Pilot Burner
Thermocouple
Blue Flame
Yellow Flame
Figure 22 - Correct Pilot Flame Pattern
Figure 23 - Incorrect Pilot Flame Pattern
Figure 24 - Correct Burner Flame Pattern
Figure 25 - Incorrect Burner Flame
Pattern
CLEANING
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner and circu
-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a
qualified service person. Heater
may need more frequent clean
-
ing due to excessive lint from
carpeting, bedding material, pet
hair, etc.
WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
