EasyManua.ls Logo

Bradford White EF120T4003NA3 User Manual

Bradford White EF120T4003NA3
52 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
Save this manual for future reference
Manual 238-53597-00D REV 3/21
SERVICE
MANUAL
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
EF120T4003(N,X)(A)3
EF120T5003(N,X)(A)3
Commercial Ultra High Efficiency Models
with Direct Spark Ignition and ICON Control System
Effective: March 2021
ECO 8323
Question and Answer IconNeed help?

Do you have a question about the Bradford White EF120T4003NA3 and is the answer not in the manual?

Bradford White EF120T4003NA3 Specifications

General IconGeneral
TypeGas
Energy Factor0.95
Height72 inches
Diameter30 inches
Fuel TypeNatural Gas
Tank Capacity120 Gallons
ThermostatYes
Warranty6 Years
Capacity120-Gallon

Summary

Determining the Age of Your Water Heater

Introduction to the Water Heater

How To Use This Manual

Tools Required for Service

Water Heater Features

Water Heater Specifications

Vent Tables

Tables detailing maximum vent lengths for different pipe sizes and models.

Sequence of Operations

Lockout Conditions Explained

Explains reasons for system lockouts and associated error codes.

Connection and Wiring Diagram

Schematic illustrating electrical connections and component layout.

Building Management System (BMS) Integration

Troubleshooting Guide

System Observation for Non-Operation

Initial steps for diagnosing a non-operating water heater with a blank display.

Water Heater Display and Control Buttons

Details the buttons and display of the water heater control system.

Diagnostic Mode Operation

Steps to enter and navigate the diagnostic mode for service.

Temperature Setpoint and Format Adjustment

Instructions for adjusting the water heater's temperature setpoint and display format (°F/°C).

Service Error Codes and Troubleshooting

Details error codes, their definitions, and the actions required to correct them.

Service Procedure I: Thermostat Circuit Testing and Replacement

Appendix A: Sensor Resistance Table

Table of sensor resistance values correlated with temperature readings.

Thermostat Sensor (Thermistor) Replacement

Step-by-step guide for removing and installing the thermostat sensor (thermistor).

Service Procedure II: Combustion System Testing and Replacement

Combustion System Removal Procedure

Instructions for safely removing the combustion system assembly from the water heater.

Combustion System Replacement Procedure

Instructions for installing the combustion system assembly with a new gasket.

Service Procedure III: Burner Tube Inspection and Replacement

Burner Tube Inspection

Procedure for visually inspecting the burner tube for damage or deterioration.

Burner Tube Replacement Procedure

Step-by-step guide for replacing the burner tube with a new one.

Service Procedure IV: Gas Valve Replacement

Gas Valve Replacement Procedure

Instructions for safely removing and replacing the gas valve assembly.

Service Procedure V: Blower Testing and Replacement

Blower Replacement Procedure

Step-by-step guide for removing and installing a new blower motor.

Service Procedure VI: Blocked Vent Pressure Switch Testing and Replacement

Check Exhaust Tube Pressure

Procedure to measure exhaust tube pressure using a manometer.

Exhaust Pressure Switch Replacement Procedure

Instructions for safely removing and installing the exhaust pressure switch.

Service Procedure VII: Flame Sensor Testing and Replacement

Flame Sensor Replacement Procedure

Step-by-step guide for removing and installing the flame sensor.

Service Procedure VIII: Spark Rod Gap Adjustment and Replacement

Spark Rod Gap Inspection and Adjustment

Procedure for measuring and adjusting the spark rod gap for proper ignition.

Spark Rod Replacement Procedure

Instructions for safely removing and installing a new spark rod.

Service Procedure IX: Ignition Control Board Replacement

Control Board Replacement

Step-by-step guide for replacing the ignition control board.

Service Procedure X: Transformer Replacement

Transformer Replacement Procedure

Instructions for safely removing and installing the transformer.

Service Procedure XI: Vent Safety Switch Testing and Replacement

Vent Safety Switch Replacement Procedure

Instructions for safely removing and installing the vent safety switch.

Service Procedure XII: Power Anode Inspection and Replacement

Powered Anode Replacement

Procedure for inspecting and replacing the powered anode system.

Water Heater Installation Checklist

Water Heater Service Report

Glossary of Terms

Contact Information

Related product manuals