Bradford-White Corp
PDX75S70F(B, CX), C)*(N Parts@bradfordwhite.com Techserv@bradfordwhite.com
Troubleshooting
Specs
Install
Parts list
Igniter/flame Sense wire
Warranty
Inner Door Removal Procedure
Burner Cleaning
How to
Blower Testing
Page 40
Email
parts@bradfordwhite.com
techserv@bradfordwhite.com
www.bradfordwhite.com
Page 39
Page 40
Image 40
Page 39
Page 40
Contents
Service Manual
Denotes Warranty Years
Table of Contents
PDX Series
Introduction
Tools Required for Service
How to Use This Manual
Specifications
PDX Series
Control Timings
Power up Sequence
Sequence of Operation
Abnormal Operation
Pressure Switch/Blower Temperature Fault
Troubleshooting
Probable Cause Service Status Procedure
Green LED Indicator
LED Status
Troubleshooting LED Status
Cast Iron Burner Air Shutter Adjustment
Burner Inspection and Air Shutter Adjustment
Air Shutter Nut
Burner Cleaning
Burner Surface area Feedline nut Pilot tubing nut Port area
Pilot Inspection, Testing and Replacement
Igniter/flame Sense wire
Feedline nut Pilot tubing nut Ferrule
Orifice
Volt potential exposure. Use caution
Exhaust Pressure Switch Testing
Making voltage checks to avoid personal injury
Exhaust Pressure Switch Replacement
Slide pressure switch in direction
From blower housing
To avoid personal injury
Inlet Pressure Switch
Switch for blockage Is there blockage?
To call for heat, this will start the blower
See
Inlet Pressure Switch Replacement
Remove screws
Blower Testing
Volt potential exposure. Use caution when
Blower Installation
Blower removal
Remove exhaust
Blower Cord Sets Blower Mounting Screws
Blower Temperature Switch Testing
Blower Temperature Switch Replacement
Thermal Well Testing
Gas Control Testing
If Control has gone into TCO lockout due to
Determine Water Temperature Inside Tank
Sensor Resistance at Various Temperatures
Gas Control & Thermal Well Removal From Water Heater
Gas Control Removal From Thermal Well
Gas Control Assembly to Thermal Well
Flammable Vapor Device Testing
Safety Circuit Voltage Trace
Wires as shown Control
VAC Circuit Trace
Shown in photo
Across black & white Y
Dip Tube Inspection and Replacement
Anode Inspection and Replacement
Flue baffle
Inner Door Removal Procedure
Installation of Inner Door With Gasket
Installation of inner door with gasket from
Glossary of Terms
Parts List
Parts@bradfordwhite.com Techserv@bradfordwhite.com
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