Bradford White D75T300 User Manual

Save this manual for future reference
Manual 47985A REV 08/18
SERVICE
MANUAL
Troubleshooting Guide
and Instructions for Service
(To be performed ONLY by
qualified service providers)
Models Covered
by This Manual:
For The Bradford White
“D” Series Models:
D38T155
D75T(125,160,300)
D65T(370,399)
D80T(180,199,250)
D80T(425,505)
D100T(199,250)
D80L(399,450,505)
D100L(199,250,270,300)
D100S(199,250)
Gas Water Heaters
COMMERCIAL 24 VOLT FLUE DAMPER
SERIES WATER HEATER WITH HONEYWELL
INTEGRATED CONTROL SYSTEM
®

Bradford White D75T300 Specifications

General

Brand	Bradford White
Model	D75T300
Category	Water Heater
Language	English

Summary

Tools Required for Service

Sequence of Operation

Troubleshooting

Accessing Service Mode

Procedure for accessing service mode on the water heater display for service personnel.

Max Setpoint Display and Change

How to display and change the maximum setpoint value on the water heater display.

Flame Current of Pilot Flame Sensor

Temperature Setpoint Adjustment

Error Code History

How to view stored error codes and history on the water heater display.

Resetting Lockout Conditions

Procedure for resetting soft and hard lockout conditions on the water heater display.

Error Code Definitions

Thermostat Circuit Testing

Sensor Resistance Testing

Procedure for testing sensor resistance at various temperatures.

Pilot Operation Testing

Pilot Inspection

Main Burner Operation Testing

Main Burner & Pilot Removal and Inspection

Main Burner Removal

Main Burner Inspection

Pilot Burner Removal

Pilot Burner Inspection

Control Board Replacement

Procedure for replacing the integrated control board on the water heater.

Flue Baffle Removal, Inspection

Anode Removal and Inspection