Desa LCB20PT Safety Information And Installation Manual

Also see for HDB20NT: Safety information and installation manual

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Desa LCB20PT Safety Information And Installation Manual Manual pdf 17 page image

www.desatech.com121254-01A 17BURNER FLAME PATTERNWARNING: If yellow tippingoccurs, your heater could pro-duce increased levels of carbonmonoxide.NOTICE: Do not mistake orangeflames with yellow tipping. Dirtor other fine particles enter theheater and burn causing briefpatches of orange flame.Figure 23 shows a correct burner flame pat-tern. Figure 24 shows an incorrect burnerflame pattern. The incorrect burner flamepattern shows yellow tipping of the flame.It also shows the flame higher than 1/2 theglass panel height.If burner flame pattern is incorrect, as shownin Figure 24• turn heater off (see To Turn Off Gas ToAppliance, page 16)• see Troubleshooting, page 19INsPeCTING HeATeRCheck pilot flame pattern and burner flamepattern often.PILOT FLAME PATTERNFigure 21 shows a correct pilot flame pattern.Figure 22 shows an incorrect pilot flame pat-tern. The incorrect pilot flame is not touchingthe thermocouple. This will cause the thermo-couple to cool. When the thermocouple cools,the heater will shut down.If pilot flame pattern is incorrect, as shownin Figure 22• turn heater off (see To Turn Off Gas to Ap-pliance, page 16)• see Troubleshooting, page 19Note: The pilot flame on natural gas units willhave a slight curve, but flame should be blueand have no yellow or orange color.Figure 23 - Correct Burner Flame PatternYellowTippingFigure 24 - Incorrect Burner FlamePattern1/2 GlassHeight1/2 GlassHeightBlueFlameThermocouple Pilot BurnerPilot BurnerThermocoupleBlue FlameYellow FlameFigure 21 - Correct Pilot Flame PatternFigure 22 - Incorrect Pilot Flame Pattern