Manuals / Bradford-White Corp / Household Appliance / Water Heater

Bradford-White Corp MI50L Table of Contents, Flammable Vapor Ignition Resistant Water Heaters

Models: M4403S M1XR403SFCX M4403T MI60T MI30S MI403S M2C504T MI503 50T65F M460T MI40T M1XR504T M4503 M440T MI303T MI504S M1XR403SFBN M450S M430T MI30T MI404T CX) M2XR504T MI50L

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FLAMMABLE VAPOR

IGNITION RESISTANT WATER HEATERS

	Page	Service Procedure
Introduction	3	- - -
Trouble shooting Chart	4	- - -
Inner Door Gasket Removal, Inspection, Replacement and Installation	5	RG-I
Thermocouple Testing and Replacement	8	RG-II
Pilot Assembly Inspection Cleaning and Replacement	10	RG-III
Piezo Igniter and Electrode Testing	11	RG-IV
Combination Thermostat/Gas Valve Testing and Replacement	12	RG-V
Burner Operation Inspection, Adjustment, Cleaning and Replacement	17	RG-VI
Resettable Thermal Switch Testing and Replacement	20	RG-VII
ScreenLok® Flame Arrestor Cleaning	22	RG-VIII
Dip Tube and Anode Inspection and Replacement	23	RG-IX
Generic Parts List	25	- - -

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Contents

Troubleshooting Guide and Instruction for Service Save this manual for future reference Manual 44943CSERVICE MANUAL For the Bradford White Defender Safety System ModelsTable of Contents FLAMMABLE VAPOR IGNITION RESISTANT WATER HEATERSINTRODUCTION The Bradford White DEFENDER Safety SystemHow the Safety System Works CORRECTIVE ACTION SERVICEPROCEDURE TROUBLESHOOTING CHARTproceed to Inner Door Gasket Replacement Procedure Inner Door Removal ProcedureInner Door Gasket Replacement Procedure followed exactly, a fire or explosion may result causingInstallation of Inner Door With Gasket Stripped fastener connections may allowthe combustion chamber Secure flange with ¼ drive screws CLOSED CIRCUIT THERMOCOUPLE TESTING Robertshaw Control SERVICE PROCEDURE RG-II Thermocouple Testing and ReplacementCLOSED CIRCUIT THERMOCOUPLE TESTING White Rodgers Control Thermocouple position OPEN CIRCUIT THERMOCOUPLE TESTINGTHERMOCOUPLE REPLACEMENT PILOT/ELECTRODE ASSEMBLY INSPECTION, CLEANING AND REPLACEMENT SERVICE PROCEDURE RG-IIIPilot Assembly Inspection, Cleaning and Replacement PIEZO IGNITER, ELECTRODE TESTING AND REPLACEMENT SERVICE PROCEDURE RG-IVPiezo Igniter, Electrode Testing and Replacement Combination Thermostat/Gas Valve Testing and Replacement SERVICE PROCEDURE RG-V Combination Thermostat/Gas Valve Testingand Replacement LINE PRESSURETHERMOCOUPLE TESTING SERVICE PROCEDURE RG-V Combination Thermostat/Gas Valve Testingand Replacement MAGNET ASSEMBLY TESTING White Rodgers ControlWire Tie ECO Energy Cut Off TESTINGCOMBINATION THERMOSTAT/GAS VALVE REPLACEMENT Step 4. Turn off water supply and drain water heater completelyWrench Boss personal injury or death explosion causing property damageA seal breach may result in a fire or MAIN BURNER Inspection, Adjustment Cleaning and Replacement SERVICE PROCEDURE RG-VI Burner Operation Inspection, AdjustmentCleaning and Replacement CAST IRON BURNER ADJUSTMENT DANGERMAIN BURNER Inspection, Adjustment Cleaning and Replacement cont BURNER CLEANING Cont RESETTABLE THERMAL SWITCH CONTINUITY TESTING SERVICE PROCEDURE RG-VII Resetting Thermal SwitchTesting and Replacement PROBABLE CAUSE FOR RESETTABLE THERMAL SWITCH ACTIVATIONRESETTABLE THERMAL SWITCH REPLACEMENT OVER TIGHTEN SCREWSSERVICE PROCEDURE RG-VIII ScreenLok Flame Arrestor Cleaning ScreenLok Flame Arrestor Cleaningthis procedure. Take necessary precaution to prevent personal injury SERVICE PROCEDURE RG-IX Dip Tube and Anode Inspection and ReplacementDIP TUBE INSPECTION AND REPLACEMENT Step 3. Disconnect outlet nipple from plumbing system ANODE INSPECTION AND REPLACEMENTthis procedure. Take necessary precaution to prevent personal injury PARTS LIST Page Page Fax/215-641-1612 Email parts@bradfordwhite.com techserv@bradfordwhite.comApplication & Sizing/800-523-2931