Bradford-White Corp C)*(N, CX), PDX Series Powered Direct Vent Gas Water Heaters, PDX250T6*F(BN, PDX265T6*F(BN, PDX275T6*F(BN, PDX50S60F(B, PDX65S65F(B, PDX75S70F(B, X)

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Contents

Main Bradford White PDX Series Powered Direct Vent Gas Water Heaters Table of Contents WARNING: FOR YOUR SAFETY Introduction Tools Required for Service Specifications Vent Tables Control Timings Specifications Power up Sequence Normal Heating Sequence Steady state operation. Thermostat satisfies. Burner off. Blower post purge (15 seconds). Sequence of Operation Abnormal Operation 1. Simulated Resistive Device Fault: Normal Heating Sequence (cont.) 2. Temperature Sensor Fault: Sequence of Operation Abnormal Operation (cont.) 3. Pressure Switch/Blower Temperature Fault: 4. Trial For Ignition Fault: 5. Flame Sensing Fault: Troubleshooting LED Status Control Status Service Procedure Probable Cause LED Status Control Status Service Procedure Probable Cause Troubleshooting Burner Inspection and Air Shutter Adjustment. Cast Iron Burner Air Shutter Adjustment Burner Cleaning Pilot Inspection, Testing and Replacement PDX SERVICE PROCEDURE III Pressure Switch Testing and Replacement Exhaust Pressure Switch Testing Exhaust Pressure Switch Replacement PDX SERVICE PROCEDURE III Pressure Switch Testing and Replacement Inlet Pressure Switch Testing Inlet Pressure Switch Replacement PDX SERVICE PROCEDURE IV Blower Testing and Replacement 115 volt potential exposure. Use caution when Blower Testing Blower removal Blower Installation Blower Temperature Switch Testing. Blower Temperature Switch Replacement. Thermal Well Testing Gas Control Testing Determine Water Temperature Inside Tank Gas Control & Thermal Well Removal From Water Heater Gas Control Removal From Thermal Well Gas Control Assembly to Thermal Well Flammable Vapor Device Testing PDX SERVICE PROCEDURE VIII Safety Circuit Voltage Trace Safety Circuit Voltage Trace NOTE: This procedureassumes a cool tank. PDX SERVICE PROCEDURE IX 120 VAC Trace 120 VAC Circuit Trace Dip Tube Inspection and Replacement Anode Inspection and Replacement Remove blower to gain access to flue baffle Inner Door Removal Procedure. Inner Door Gasket Replacement Procedure. Installation of Inner Door With Gasket. Installation of inner door with gasket (continued from page 36). Page Parts List

Bradford-White Corp - page 40

Models: C)(N CX) PDX Series Powered Direct Vent Gas Water Heaters PDX250T6F(BN PDX265T6F(BN PDX275T6F(BN PDX50S60F(B PDX65S65F(B PDX75S70F(B X)