Bradford-White Corp U4TW60T*FRN, U4TW50T*FRN, U4TW40T*FRN guide

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Bradford-White Corp U4TW60T*FRN, U4TW50T*FRN, U4TW40T*FRN service manual

Contents

Service Manual Table of Contents Page Page Introduction Bradford White ECO-DEFENDER Safety System How the Safety System Works How to Use this Manual Tools Required Tools Required for Service Specifications Gallon Vent Tables Specifications Control Timings Wiring Diagram Normal Heating Sequence Power Up SequenceSequence of Operation Abnormal Operation Normal Heating Sequence cont’d Abnormal Operation cont’d Sequence of Operation Sequence of Operation LED Status Control Status Probable Cause Service Procedure Troubleshooting Troubleshooting Troubleshooting Burner Inspection Burner MaintenanceBurner Cleaning Procedure Burner Cleaning Procedure cont’d Pilot Inspection, Testing and Replacement Pilot Maintenance Pilot Inspection, Testing and Replacement cont’d Page Pressure Switch Testing Pressure Switch Testing Pressure Switch Testing cont’d Pressure Switch Replacement Pressure Switch Replacement Blower Testing Blower TestingPage Blower Removal Blower ReplacementBlower Installation Blower Temperature Switch Testing Blower Temperature Switch TestingBlower Installation cont’d Switch Setting Blower Temperature Switch Testing cont’d Blower Temperature Switch Replacement Blower Temperature Switch Replacement Thermal Well Testing Thermal Well Testing Determine Water Temperature Inside Tank Determine Tank TemperatureThermal Well Testing cont’d Gas Control & Thermal Well Removal From Water Heater Component DisassemblySensor Resistance at Various Temperatures Gas Control Removal Gas Control Removal From Thermal Well cont’d Gas Control AssemblyGas Control Assembly to the Thermal Well Gas Control Assembly to the Thermal Well cont’d Flammable Vapor Sensor Testing Flammable Vapor Sensor Testing VAC Circuit Trace Safety Circuit Voltage Trace Safety Circuit Voltage Trace Blower Removal Remove the Blower to Gain Access to the Flue Baffle Dip Tube Inspection Remove the Blower to Gain Access to the Flue Baffle cont’dDip Tube Inspection and Replacement Anode Inspection Anode Inspection and Replacement Inner Door Removal Inner Door Removal Procedure Inner Door Gasket Replacement Procedure Inner Door Gasket ReplacementInner Door Removal Procedure cont’d Inner Door Installation with Gasket Inner Door Installation ScreenLok Flame Arrestor Cleaning Procedure Arrestor Cleaning Common Terms Common Terms Part Name and Description Parts List Parts@bradfordwhite.com Techserv@bradfordwhite.com