L.B. White 140 Owner's Manual And Instructions

Contents

L.B. White 140 Owner's Manual And Instructions Manual pdf 20 page image

READ THIS ENTIRE SECTION BEFOREBEGINNING TO TROUBLESHOOT PROBLEMS.The following troubleshooting flow charts provide systematicprocedures for isolating heater problems. The charts areintended for use by a QUALIFIED GAS HEATER SERVICEPERSON. DO NNOT SSERVICE TTHE HHEATER UUNLESS YYOU HHAVEBEEN PPROPERLY TTRAINED.TEST EQUIPMENT REQUIREDThe following pieces of test equipment will be required totroubleshoot this system with minimal time and effort.• Digital MMultimeter - For measuring DC voltage when usingthermocouple diagnostic kit.• Thermocouple DDiagnostic KKit - (L. B. White Part No.21188) When used with a standard digital multimeter,this kit allows testing of the thermocouple andelectromagnetic power unit.• Pressure GGauge - (L. B. White Part No. 20736) Forchecking inlet pressures to the heaters.INITIAL PREPARATION-- Inspect heater for damage.-- Clean heater as necessary.Heater PProblems Page1. Inner Combustion Cone will not Light . . . . . . . . . . . . . . .212. Inner Combustion Cone Lights,but will not Stay Lit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223. Outer Combustion Cone Does Not Heat up onHigh Thermostatic Head Setting . . . . . . . . . . . . . . . . . . .234. Heater Backflashes Gas Through Injector BodyAir Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245. Heater Does Not Return toLow Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Components should be replaced only after each step hasbeen completed and replacement is suggested in the flowchart. Refer to the servicing sections as necessary to obtaininformation on disassembly and replacement procedures ofthe component once the problem is identified by the flowchart.20Troubleshooting GuideWARNINGBBuurrnn HHaazzaarrdd■ Troubleshooting this system may require operating theheater with the burner on. Use extreme caution whenworking on the heater.■ Failure to follow this warning will result in burnscausing severe injury.