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

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Bradford-White Corp U4TW40T*FRN, U4TW50T*FRN, U4TW60T*FRN service manual Parts@bradfordwhite.com Techserv@bradfordwhite.com

Contents

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