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Bradford-White Corp
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Water Heater
Bradford-White Corp
MI50L, CX), M1XR403S*FCX, MI504S, MI60T, MI40T, MI404T, MI30T, M430T, M2XR504T, M450S
Models:
M4403S
M1XR403S*FCX
M4403T
MI60T
MI30S
MI403S
M2C504T
MI503
50T65F
M460T
MI40T
M1XR504T
M4503
M440T
MI303T
MI504S
M1XR403S*FBN
M450S
M430T
MI30T
MI404T
CX)
M2XR504T
MI50L
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Troubleshooting
Install
Parts list
proceed to Inner Door Gasket Replacement Procedure
Wire Tie
SERVICE PROCEDURE RG-VII Resetting Thermal Switch
MAGNET ASSEMBLY TESTING White Rodgers Control
Procedure
Cast Iron Burner Adjustment Danger
BURNER CLEANING Cont
Page 26
Image 26
NOTES
Page 25
Page 27
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Page 27
Contents
Troubleshooting Guide and Instruction for Service
Save this manual for future reference Manual 44943C
SERVICE MANUAL
For the Bradford White Defender Safety System Models
Table of Contents
FLAMMABLE VAPOR IGNITION RESISTANT WATER HEATERS
INTRODUCTION
The Bradford White DEFENDER Safety System
How the Safety System Works
CORRECTIVE ACTION
SERVICE
PROCEDURE
TROUBLESHOOTING CHART
proceed to Inner Door Gasket Replacement Procedure
Inner Door Removal Procedure
Inner Door Gasket Replacement Procedure
followed exactly, a fire or explosion may result causing
Installation of Inner Door With Gasket
Stripped fastener connections may allow
the combustion chamber Secure flange with ¼ drive screws
CLOSED CIRCUIT THERMOCOUPLE TESTING Robertshaw Control
SERVICE PROCEDURE RG-II Thermocouple Testing and Replacement
CLOSED CIRCUIT THERMOCOUPLE TESTING White Rodgers Control
Thermocouple position
OPEN CIRCUIT THERMOCOUPLE TESTING
THERMOCOUPLE REPLACEMENT
PILOT/ELECTRODE ASSEMBLY INSPECTION, CLEANING AND REPLACEMENT
SERVICE PROCEDURE RG-III
Pilot Assembly Inspection, Cleaning and Replacement
PIEZO IGNITER, ELECTRODE TESTING AND REPLACEMENT
SERVICE PROCEDURE RG-IV
Piezo Igniter, Electrode Testing and Replacement
Combination Thermostat/Gas Valve Testing and Replacement
SERVICE PROCEDURE RG-V Combination Thermostat/Gas Valve Testing
and Replacement
LINE PRESSURE
THERMOCOUPLE TESTING
SERVICE PROCEDURE RG-V Combination Thermostat/Gas Valve Testing
and Replacement
MAGNET ASSEMBLY TESTING White Rodgers Control
Wire Tie
ECO Energy Cut Off TESTING
COMBINATION THERMOSTAT/GAS VALVE REPLACEMENT
Step 4. Turn off water supply and drain water heater completely
Wrench Boss
personal injury or death
explosion causing property damage
A seal breach may result in a fire or
MAIN BURNER Inspection, Adjustment Cleaning and Replacement
SERVICE PROCEDURE RG-VI Burner Operation Inspection, Adjustment
Cleaning and Replacement
CAST IRON BURNER ADJUSTMENT DANGER
MAIN BURNER Inspection, Adjustment Cleaning and Replacement cont
BURNER CLEANING Cont
RESETTABLE THERMAL SWITCH CONTINUITY TESTING
SERVICE PROCEDURE RG-VII Resetting Thermal Switch
Testing and Replacement
PROBABLE CAUSE FOR RESETTABLE THERMAL SWITCH ACTIVATION
RESETTABLE THERMAL SWITCH REPLACEMENT
OVER TIGHTEN SCREWS
SERVICE PROCEDURE RG-VIII ScreenLok Flame Arrestor Cleaning
ScreenLok Flame Arrestor Cleaning
this procedure. Take necessary precaution to prevent personal injury
SERVICE PROCEDURE RG-IX Dip Tube and Anode Inspection and Replacement
DIP TUBE INSPECTION AND REPLACEMENT
Step 3. Disconnect outlet nipple from plumbing system
ANODE INSPECTION AND REPLACEMENT
this procedure. Take necessary precaution to prevent personal injury
PARTS LIST
Page
Page
Fax/215-641-1612
Email parts@bradfordwhite.com techserv@bradfordwhite.com
Application & Sizing/800-523-2931