Inspecting Burners, Pilot Flame Pattern, Burner Flame Patterns

(Natural Gas)

INSPECTING BURNERS

Pilot Flame Pattern Burner Flame Patterns

INSPECTING BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

Figure 37 shows a correct pilot flame pattern. Figure 38 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.

If pilot flame pattern is incorrect, as shown in Figure 38

•turn heater off (see To Turn Off Gas to Appliance, page 18 [Ther- mostat-Controlled Models] or page 20 [Remote-Ready Models])

•see Troubleshooting, pages 24 through 26

Note: The pilot flame on natural gas units will have a slight curve, but the flame should be blue and have no yellow or orange color.

Pilot Burner Thermocouple	Pilot Burner
	Thermocouple
(Natural Gas)	(Propane/LP Gas)

Figure 37 - Correct Pilot Flame Pattern (Your pilot may vary from

pilots shown)	Thermocouple
Pilot Burner	Pilot Burner
Pilot Burner

Thermocouple (Propane/LP Gas)

Figure 38 - Incorrect Pilot Flame Pattern (Your pilot may vary from pilots shown)

BURNER FLAME PATTERNS

Figure39 showscorrectfrontand/ormiddleburnerflamepatterns.Figure 40 shows incorrect front and/or middle burner flame patterns. The incorrect burner flame patterns show yellow tipping at top of blue flame.

WARNING: If yellow tipping occurs, your heater could produce increased levels of carbon monoxide. If burner flame patterns show yellow tipping, follow in- structions below. Yellow flame on rear burner is normal.