Desa INTERNATIONAL UNVENTED (VENT-FREE) GAS LOG HEATER Inspecting Burners, Pilot Flame Pattern

INSPECTING BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

Figure 42 shows a correct pilot flame pattern. Figure 43 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 43

•turn heater off (see To Turn Off Gas to Appliance, page 19 [Ther- mostat-Controlled Models] or page 21 [Remote-Ready Models])

•see Troubleshooting, pages 25 through 27

Pilot Burner Thermocouple Pilot Burner

Thermocouple

Figure 42 - Correct Pilot Flame Pattern (Your pilot may vary from pilots shown)

Pilot Burner

Pilot Burner

ThermocoupleThermocouple

Figure 43 - Incorrect Pilot Flame Pattern (Your pilot may vary from pilots shown)

INSPECTING BURNERS	23
Flame Pattern

Front Burner Flame Pattern

FRONT BURNER FLAME PATTERN

Figure 44 shows correct front burner flame pattern. Figure 45 shows incorrect front burner flame pattern. The incorrect burner flame pattern shows yellow tipping at top of blue flame.

WARNING: If yellow tipping occurs, your heater could produce increased levels of carbon monoxide. If front burner flame pattern shows yellow tipping, follow instructions at bottom of this page. Yellow flame on rear burner is normal.

NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles are burned by heater, causing brief patches of orange flame.

If front burner flame pattern is incorrect, as shown in Figure 45

•turn heater off (see To Turn Off Gas to Appliance, page 19 [Ther- mostat-Controlled Models] or page 21 [Remote-Ready Models])

•see Troubleshooting, pages 25 through 27

Figure 44 - Correct Front Burner Flame Pattern

Yellow Tipping At Top

of Blue Flame

Figure 45 - Incorrect Front Burner Flame Pattern

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