Bradford-White Corp CX), PDX75S70F(B, C)*(N, PDX65S65F(B, PDX275T6*F(BN warranty Table of Contents

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Bradford White

PDX Series

Powered Direct Vent Gas Water Heaters

Table of Contents

 

 

Page

TTW Service Procedure

Introduction

 

4

 

- - -

How to use this manual

5

- - -

Tool required for service

5

- - -

Specifications

6

- - -

Control Timings

8

- - -

Sequence of Operation

9

- - -

Troubleshooting

12

- - -

Burner Inspection, Cleaning and Replacement

14

 

I

Pilot Testing, Cleaning and Replacement

16

 

II

Pressure Switch Testing and Replacement

17

 

III

Blower Testing and Replacement

21

 

IV

Blower Temperature Switch Testing and Replacement

23

 

V

Gas Control & Thermal well Testing & Replacement

25

 

VI

Flammable Vapor Sensor Testing & Replacement

29

 

VII

Safety Circuit Voltage Trace

30

 

VIII

115VAC Circuit Trace

31

 

IX

Dip Tube inspection and Replacement

32

 

X

Anode Inspection and Replacement

33

 

XI

Flue Baffle Inspection and Replacement

34

 

XII

Inner Door Removal, Inspection & Replacement

35

 

XIII

Glossary of Terms

38

- - -

Parts List

39

- - -

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Contents Service Manual Denotes Warranty YearsTable of Contents PDX Series Introduction Tools Required for Service How to Use This ManualSpecifications PDX Series Control Timings Power up Sequence Sequence of OperationAbnormal Operation Pressure Switch/Blower Temperature Fault Green LED Indicator TroubleshootingProbable Cause Service Status Procedure LED StatusTroubleshooting LED Status Air Shutter Nut Burner Inspection and Air Shutter AdjustmentCast Iron Burner Air Shutter Adjustment Burner Cleaning Burner Surface area Feedline nut Pilot tubing nut Port areaFeedline nut Pilot tubing nut Ferrule Pilot Inspection, Testing and ReplacementIgniter/flame Sense wire OrificeMaking voltage checks to avoid personal injury Exhaust Pressure Switch TestingVolt potential exposure. Use caution From blower housing Exhaust Pressure Switch ReplacementSlide pressure switch in direction To avoid personal injuryTo call for heat, this will start the blower Inlet Pressure SwitchSwitch for blockage Is there blockage? SeeInlet Pressure Switch Replacement Remove screwsBlower Testing Volt potential exposure. Use caution whenRemove exhaust Blower InstallationBlower removal Blower Cord Sets Blower Mounting ScrewsBlower Temperature Switch Testing Blower Temperature Switch Replacement If Control has gone into TCO lockout due to Gas Control TestingThermal Well Testing Determine Water Temperature Inside Tank Sensor Resistance at Various TemperaturesGas Control & Thermal Well Removal From Water Heater Gas Control Removal From Thermal WellGas Control Assembly to Thermal Well Flammable Vapor Device Testing Safety Circuit Voltage Trace Shown in photo Wires as shown ControlVAC Circuit Trace Across black & white YDip 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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