Desa CBN20, CBP20, SBN20, SBP20, CBN20T, CBP20T, CBN30T, CBP30T, CBT20NT, CBT20PT, CBT30NT, CBT30PT, CBN20TK, CBP20TK Safety And Installation Manual

Contents

Desa CBN20, CBP20, SBN20, SBP20, CBN20T, CBP20T, CBN30T, CBP30T, CBT20NT, CBT20PT, CBT30NT, CBT30PT, CBN20TK, CBP20TK Safety And Installation Manual Manual pdf 16 page image

www.desatech.com 107882-01K16MANUAL LIGHTINGPROCEDURE1. Remove front panel (see Figure 7, page 9).2. Follow steps 1 through 5 under LightingInstructions, page 14.3. With control knob pressed in, strike match.Hold match to pilot until pilot lights.4. Keep control knob pressed in for 30 secondsafter lighting pilot. After 30 seconds, releasecontrol knob. Now follow step 8, underLighting Instructions, page 14.5. Replace front panel.INSPECTING HEATERCheck pilot flame pattern and burner flame pat-tern often.PILOT FLAME PATTERNFigure 21 shows a correct pilot flame pattern. Figure22 shows an incorrect pilot flame pattern. The incor-rect pilot flame is not touching the thermocouple.This will cause the thermocouple to cool. When thethermocouple cools, the heater will shut down.If pilot flame pattern is incorrect, as shown inFigure 22• turn heater off (see To Turn Off Gas to Appli-ance, page 15)• see Troubleshooting, page 19Note: The pilot flame on natural gas units willhave a slight curve, but flame should be blue andhave no yellow or orange color.OPERATING HEATERContinuedFigure 22 - Incorrect Pilot Flame PatternFigure 21 - Correct Pilot Flame PatternThermocouplePilot BurnerPilot BurnerThermocoupleBlue FlameYellow FlameBURNER 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 pattern.Figure 24 shows an incorrect burner flame pattern.The incorrect burner flame pattern shows yellowtipping of the flame. It also shows the flame higherthan 1/2 the glass panel height.If burner flame pattern is incorrect, as shown inFigure 24• turn heater off (see To Turn Off Gas To Appli-ance, page 15)• see Troubleshooting, page 191/2 GLASS HEIGHTCORRECT FLAME PATTERNAT HIGH POSITIONINCORRECT FLAME PATTERNAT HIGH POSITION1/2 GLASS HEIGHTFigure 23 - Correct Burner Flame PatternYellow Tipping1/2 GLASS HEIGHTCORRECT FLAME PATTERNAT HIGH POSITIONINCORRECT FLAME PATTERNAT HIGH POSITION1/2 GLASS HEIGHTFigure 24 - Incorrect Burner FlamePattern1/2 GlassHeightBlueFlame1/2 GlassHeight