Desa VGC18NR/PR Owner's Operation And Installation Manual

Also see for VGC18NR: Owner's manual Instruction manual OWNER'S OPERATION AND INSTALLATION MANUAL

Contents

Desa VGC18NR/PR Owner's Operation And Installation Manual Manual pdf 23 page image

www.desatech.com119162-01A 23INSPECTING bURNERSCheck pilot flame pattern and burner flame pat-terns often.pILOT FLAME pATTERNFigure 35 shows a correct pilot flame pattern.Figure 36 shows an incorrect pilot flame pattern.The incorrect pilot flame is not touching thethermocouple. This will cause the thermocoupleto cool. When the thermocouple cools, the heaterwill shut down.If pilot flame pattern is incorrect, as shown inFigure 36• turn heater off (see To Turn Off Gas to Appli-ance, page 21• see Troubleshooting, page 25Note: The pilot flame on natural gas units willhave a slight curve, but flame should be blue andhave no yellow or orange color.Figure 35 - Correct Pilot Flame PatternPilot BurnerThermocoupleFigure 36 - Incorrect Pilot Flame PatternThermocouplePilot BurnerFRONT BURNER FLAME PATTERNFigure 36 shows correct front burner flame pat-tern. Figure 37 shows incorrect front burner flamepattern. The incorrect burner flame pattern showsyellow tipping at top of blue flame.WARNING: If yellow tippingoccurs, your heater could pro-duce increased levels of carbonmonoxide. If front burner flamepattern shows yellow tipping,follow instructions at bottom ofthis page. Yellow flame on rearburner is normal.Figure 37 - Correct Front Burner FlamePatternFigure 38 - Incorrect Front Burner FlamePatternNOTICE: Do not mistake orangeflames with yellow tipping. Dirtor other fine particles are burnedby heater, causing brief patchesof orange flame.If front burner flame pattern is incorrect, as shownin Figure 37• turn heater off (see To Turn Off Gas to Appli-ance, page 21)• see Troubleshooting, page 25Yellow Tipping AtTop of Blue FlameWIRING DIAGRAMToThermopileTo AUTO/OFF/ONSwitch or RemoteReceiver