11101870OWNER’S MANUALCheck pilot flame pattern and burner flamepattern often.PILOT FLAME PATTERNFigure 17 shows a correct pilot flame pat-tern. Figure 18 shows an incorrect pilotflame pattern. The incorrect pilot flame isnot touching the thermocouple. This willcause the thermocouple to cool. When thethermocouple cools, the heater will shutdown.INSPECTINGBURNERGRH/OV 009GOOD PILOTThermocouplePilot BurnerGRH/OV 010BAD PILOTPilot BurnerThermocoupleFigure 17 - Correct Pilot Flame PatternFigure 18 - Incorrect Pilot Flame PatternIf pilot flame pattern is incorrect, as shownin Figure 18• turn heater off (see To Turn Off Gasto Appliance, page 10)• see Troubleshooting, pages 12through 141/2 GLASS HEIGHTINCORRECT FLAME PATTERNAT HIGH POSITIONNOTICE: Do not mistake orangeflames with yellow tipping. Dustor other fine particles enter theheater and burn causing briefpatches of orange flame.BURNER FLAME PATTERNFigure 19 shows a correct burner flamepattern. Figure 20 shows an incorrect burnerflame pattern. The incorrect burner flamepattern shows yellow tipping of the flame. Italso shows the flame higher than 1/2 theglass panel height.WARNING: If yellow tippingoccurs, your heater could pro-duce increased levels of carbonmonoxide. If burner flame pat-tern shows yellow tipping, followinstructions at bottom of thispage.If burner flame pattern is incorrect, as shownin Figure 20• turn heater off (see To Turn Off Gasto Appliance, page 10)• see Troubleshooting, pages 12through 14CORRECT FLAME PATTERNAT HIGH POSITION1/2 GLASS HEIGHTYellowTipping(Model CGN6 will be lower due tolower input rating)Figure 20 - Incorrect Burner Flame PatternFigure 19 - Correct Burner Flame Pattern(ModelCGN10A)CLEANING ANDMAINTENANCEODS/PILOT AND BURNERORIFICE• Use a vacuum cleaner, pressurizedair, or small, soft bristled brush toclean.CABINETAir Passageways• Use a vacuum cleaner or pressurizedair to clean.Exterior• Use a soft cloth dampened with amild soap and water mixture. Wipethe cabinet to remove dust.WARNING: Turn off heaterand let cool before cleaning.CAUTION: You must keepcontrol areas, burner, and circu-lating air passageways of heaterclean. Inspect these areas ofheater before each use. Haveheater inspected yearly by a quali-fied service person. Heater mayneed more frequent cleaning dueto excessive lint from carpeting,bedding material, etc.