www.desatech.com 111826-04C1810. Continue holding down metal core forabout 10 seconds and then release the metalcore. Pilot should stay lit. If not, repeat stepsone through 4, page 17.11. Turn MAN knob to ON position - main gasflows.12. Turn Motor-knob to adjust flame. Knob hasa slipping clutch that allows manual flameheight adjustment.TO TURN GAS OFFTO APPLIANCEShutting Off HeaterPress OFF button on remote control to switchoff main gas and pilot gas or manually turnMotor-Knob clockwise to the "O" OFFposition.Shutting Off Burner Only (pilot stays lit)Press to decrease the flame height and shut offmain burner.INSPECTING BURNERSCheck pilot flame pattern and burner flame pat-terns often.PILOT FLAME PATTERNFigure 19 shows a correct pilot flame pattern.Figure 20 shows an incorrect pilot flame pattern.The incorrect pilot flame is not touching thethermocouple. When the thermocouple cools, theheater will shut down.If pilot flame pattern is incorrect, as shown inFigure 20• turn heater off (see To Turn Off Gas to Appli-ance, above or page 17)• see Troubleshooting, page 20Note: The pilot flame on natural gas units willhave a slight curve, but flame should be blue andhave no yellow or orange color.OPERATING HEATERContinuedThermocoupleThermocoupleFigure 20 - Incorrect Pilot Flame Pattern(Natural Gas Pilot Shown)Figure 19 - Correct Pilot Flame Pattern(Natural Gas Pilot Shown)BURNER FLAME PATTERNFigure 21 shows correct burner flame pattern.NOTICE: Do not mistake orangeflames with yellow tipping. Dirtor other fine particles are burnedby heater, causing brief patchesof orange flame.If burner flame pattern is incorrect, as shown inFigure 22• turn appliance off (see To Turn Off Gas to Ap-pliance in column 1 or page 17• see Troubleshooting, page 20Figure 21 - Correct Burner Flame PatternFigure 22 - Correct Burner Flame PatternYellow Tippingat Top of BlueFlame