INSPECTING BURNER
Continued
If pilot flame pattern is incorrect, as shown in Figure 19
•turn heater off (see To Turn Off Gas to Appliance, page 15 [Thermostat Model] or page 18
•see Troubleshooting, pages 20 through 23
BURNER FLAME PATTERN
Figure 20 shows a correct burner flame pattern. Figure 21 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.
!WARNING
If yellow tipping occurs, your heater could produce increased levels of carbon monoxide. If burner flame pattern shows yellow tipping, follow instructions at bottom of this page.
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.
1/2 HEAT SHIELD OR GLASS HEIGHT
CORRECT FLAME PATTERN
AT HIGH POSITION
Figure 20 - Correct Burner Flame Pattern
Yellow
Tipping
1/2 HEAT SHIELD OR GLASS HEIGHT
INCORRECT FLAME PATTERN
AT HIGH POSITION
Figure 21 - Incorrect Burner Flame Pattern
If burner flame pattern is incorrect, as shown in Figure 21
•turn heater off (see To Turn Off Gas to Appliance, page 15 [Thermostat Model] or page 18
•see Troubleshooting, pages 20 through 23
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