Bradford White D100T1993N User Manual

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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 D100T1993N Specifications

General

Model Number	D100T1993N
Fuel Type	Natural Gas
Tank Capacity	100 gallons
First Hour Rating	199 gallons
Energy Factor	0.67
Thermostat	Adjustable
Venting	Atmospheric
Warranty	6 years
BTU Input	199, 000 BTU
Type	Tank

Summary

Troubleshooting

Water Heater Operation and Display Faults

Guides troubleshooting for non-operational water heaters or blank displays.

Specific Error Code Diagnostics

Troubleshooting steps for specific error codes like 55, 56, 62, and 63.

Error Code Definitions and History

Lists error code definitions and procedures for viewing error code history and resetting lockouts.

Service Procedure D24-I: Thermostat Circuit Testing

Sensor Reading Faults and High Temperature Issues

Steps to diagnose sensor reading faults (codes 31/32) and high temperature lockouts (code 65).

Sensor Resistance Testing Procedure

Service Procedure D24-II: Pilot Operation and Inspection

Pilot Ignition and Flame Signal Faults

Pilot Assembly Inspection for Shorts

Service Procedure D24-III: Main Burner Operation Testing

Main Burner Failure to Light

Main Burner Short Cycling Diagnosis

Service Procedure D24-IV: Component Removal and Replacement

Control Board Replacement

Service Procedure D24-V: Flue Baffle Removal and Inspection

Service Procedure D24-VI: Anode Removal and Inspection