Table Of Contents - Bradford White EF120T4003N3 Service Manual

Ultra High Efficiency Models with Direct Spark Ignition

Table of Contents

Introduction....................................................................................................3
How to Use This Manual................................................................................ ..4
Tools Required for Service............................................................................. ..4
Features..................................................................................................... ..5
Specifications.............................................................................................. ..6
Sequence of Operations................................................................................. ..9
Building Management System (BMS).................................................................10
Troubleshooting........................................................................................... .11
Service Procedure I: Thermostat Circuit Testing and Replacement......................... .19
Service Procedure II: Combustion System Testing and Replacement........................23
Service Procedure III: Burner Tube Inspection and Replacement.............................27
Service Procedure IV: Gas Valve Replacement................................................... .29
Service Procedure V: Blower Testing and Replacement........................................30
Service Procedure VI: Blocked Vent Pressure Switch Testing and Replacement.........32
Service Procedure VII: Flame Sensor Testing and Replacement.............................35
Service Procedure VIII: Spark Rod Gap Adjustment and Replacement..................... .37
Service Procedure IX: Ignition Control Board Replacement.................................... .39
Service Procedure X: Transformer Replacement..................................................40
Service Procedure XI: Vent Safety Switch Testing and Replacement........................41
Service Procedure XII: Power Anode Inspection and Replacement......................... .43
Water Heater Installation Checklist....................................................................44
Water Heater Service Report........................................................................... .45
Glossary of Terms..........................................................................................46
Notes..........................................................................................................46
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