Table Of Contents - Bradford White EF120T4003NA3 Service Manual

Ultra High Efficiency Models with Direct Spark Ignition
Serial Number Breakdown................................................................................
Introduction..................................................................................................
How to Use This Manual................................................................................ ..5
Tools Required for Service............................................................................. ..5
Features..................................................................................................... ..5
Specifications.............................................................................................. ..6
Sequence of Operations................................................................................. ..9
Building Management System (BMS)................................................................ .11
Troubleshooting........................................................................................... .12
Service Procedure I: Thermostat Circuit Testing and Replacement......................... .21
Service Procedure II: Combustion System Testing and Replacement....................... .25
Service Procedure III: Burner Tube Inspection and Replacement............................ .29
Service Procedure IV: Gas Valve Replacement................................................... .31
Service Procedure V: Blower Testing and Replacement........................................ .32
Service Procedure VI: Blocked Vent Pressure Switch Testing and Replacement........ .34
Service Procedure VII: Flame Sensor Testing and Replacement............................. .37
Service Procedure VIII: Spark Rod Gap Adjustment and Replacement..................... .39
Service Procedure IX: Ignition Control Board Replacement.................................... .41
Service Procedure X: Transformer Replacement................................................. .42
Service Procedure XI: Vent Safety Switch Testing and Replacement....................... .43
Service Procedure XII: Power Anode Inspection and Replacement......................... .45
Water Heater Installation Checklist................................................................... .46
Water Heater Service Report........................................................................... .47
Glossary of Terms......................................................................................... .48
Notes......................................................................................................... .48
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