Bradford-White Corp PDX75S70F(B, CX), C)*(N warranty Service Manual, Denotes Warranty Years

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Bradford White

PDX Series

Powered Direct Vent Gas Water Heaters

SERVICE

MANUAL

Troubleshooting Guide

and Instructions for Service

(To be performed ONLY by qualified service providers)

For Bradford White

PDX Series Models:

PDX250T6*F(BN,CX)

PDX265T6*F(BN,CX)

PDX275T6*F(BN,CX)

PDX50S60F(B,C)*(N,X)

PDX65S65F(B,C)*(N,X)

PDX75S70F(B,C)*(N,X)

(*) Denotes Warranty Years

Manual 46925A

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Contents Denotes Warranty Years Service ManualTable of Contents PDX Series Introduction How to Use This Manual Tools Required for ServiceSpecifications PDX Series Control Timings Sequence of Operation Power up SequenceAbnormal Operation Pressure Switch/Blower Temperature Fault Probable Cause Service Status Procedure TroubleshootingGreen LED Indicator LED StatusTroubleshooting LED Status Cast Iron Burner Air Shutter Adjustment Burner Inspection and Air Shutter AdjustmentAir Shutter Nut Burner Surface area Feedline nut Pilot tubing nut Port area Burner CleaningIgniter/flame Sense wire Pilot Inspection, Testing and ReplacementFeedline nut Pilot tubing nut Ferrule OrificeVolt potential exposure. Use caution Exhaust Pressure Switch TestingMaking voltage checks to avoid personal injury Slide pressure switch in direction Exhaust Pressure Switch ReplacementFrom blower housing To avoid personal injurySwitch for blockage Is there blockage? Inlet Pressure SwitchTo call for heat, this will start the blower SeeRemove screws Inlet Pressure Switch ReplacementVolt potential exposure. Use caution when Blower TestingBlower removal Blower InstallationRemove exhaust Blower Cord Sets Blower Mounting ScrewsBlower Temperature Switch Testing Blower Temperature Switch Replacement Thermal Well Testing Gas Control TestingIf Control has gone into TCO lockout due to Sensor Resistance at Various Temperatures Determine Water Temperature Inside TankGas Control Removal From Thermal Well Gas Control & Thermal Well Removal From Water HeaterGas Control Assembly to Thermal Well Flammable Vapor Device Testing Safety Circuit Voltage Trace VAC Circuit Trace Wires as shown ControlShown in photo 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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