Raypak 2600401 Installation & Operating Instructions Manual

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Raypak 2600401 Installation & Operating Instructions Manual Manual pdf 26 page image

26Inspection ProceduresBurnersClean main burners and air louvers of dust, lint anddebris. Keep heater area clear and free from com-bustibles and flammable liquids. Do not obstruct theflow of combustion and ventilating air. Make visualcheck of burner and pilot flame. Yellow flame indicatesclogging of air openings. Lifting or blowing flame indi-cates excess high gas pressure. Low flame indicateslow gas pressure.Fig. 26: Typical Main Burner FlameFig. 27: Pilot Burner Flame (IID units)Fig. 28: Pilot Burner Flame (STG Pilot Units)ControlsCheck all controls to see that they are operational. Tocheck electronic safety (IID Models) , turn off mainburner. Observe pilot burner when shutting off pilotgas. Ignition spark should go on. Main gas valve willalso drop out.High Limit Switch - to check high limit switch, turn dialsetting down to a point slightly below the temperatureof the water leaving the heater. The reset buttonshould snap out and the burner should shut off. Resetdial to 30°F to 40°F above desired operating tempera-ture, and push reset button. Burner should light.Low NOx Heaters—Models 261–401The Low NOx Heater is offered as a model W1-ON-OFF firing.The heaters are certified and tested under the ANSIZ21.10.3 Standards for hot water heaters.The heater should be installed to meet all local codes,the National Fuel Gas Code Z223.1 and with theNational Electrical Code, ANSI/NFPA 70.SEE DETAIL VIEW ADETAIL AFig. 29: Burner Detail