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IMPORTANT: Owner's should check pilot flame pattern and burner flame pattern often.
Incorrect flame patterns indicate the need for cleaning (see Care and Maintenance,
page 18) or service.
WARNING: Only a qualified service person should service and
repair heater. This includes maintenance requiring replacement or
alteration of components.
Figure 20 shows a correct pilot flame pattern.
Figure 21 shows an incorrect pilot flame pat-
tern. The incorrect pilot flame is not touching
the thermocouple. This will cause the ther-
mocouple to cool, which shuts the heater off.
If pilot flame pattern is incorrect, as shown
in Figure 21
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 16)
• see Troubleshooting pages 19 through 21.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If the burner flame
pattern shows yellow tipping,
follow instructions below.
Figure 22 shows a correct burner flame pat-
tern. Figure 23 shows an incorrect burner
flame pattern. The incorrect burner flame
pattern shows yellow tipping of the flame. It
also shows the flame higher than 1/2 the heat
shield height.
If burner flame pattern is incorrect, as shown
in Figure 23
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 16)
• see Troubleshooting pages 19 through 21.
200314-01D
INSPECTING BURNERS
PILOT FLAME PATTERN
BURNER FLAME PATTERN
www.usaprocom.com
Notice: Do not mistake orange flames with
yellow tipping. Dirt or other fine particles enter
the heater and burn causing brief patches of
orange flame.
Figure 20 - Correct Pilot Flame Pattern
Figure 21 - Incorrect Pilot Flame Pattern
Figure 22 - Correct Burner Flame Pattern
Figure 23 - Incorrect Burner Flame
Pattern
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