Bradford-White Corp CX), PDX75S70F(B, C)*(N Blower removal, Blower Installation, Remove exhaust

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Pin location holes in
jacket head
Locating Pins on blower flange
Vertical air intake
Vertical air intake
bracket

PDX Series

PDX SERVICE PROCEDURE IV

Blower Testing and Replacement

Blower removal

Step 1. Position gas control power switch to the “OFF” position. Step 2. Unplug blower power cord from wall outlet.

Step 3. Disconnect vent system from exhaust adapter on top of blower.

Step 4. Remove exhaust adapter from blower (blade screw driver) and retain for use on new blower

Step 5. Unplug cord sets from blower. Step 6. Remove vertical air intake bracket.

Step 7. Disconnect vertical air intake from blower.

Step 8. Remove the three blower mounting screws (¼" nut driver).

Step 9. Remove blower with gasket from water heater.

Remove exhaust

adapter and retain for use on new blower.

Blower

Cord Sets

Blower Mounting

Screws

Blower Installation

Step 10. Clean any debris from jacket head of water heater.

Step 11. Set new blower with gasket in place using locating pins on blower flange to line up with location holes in jacket head. Be sure not to damage gasket.

Step 12. Secure blower in place using mounting screws from step 8. Step 13. Slide vertical air intake tee onto blower.

Step 14. Re-install vertical air intake bracket. Step 15. Re-install exhaust adapter from step 4.

Step 16. Reconnect vent system to exhaust adapter. Step 17. Reconnect cord sets from step 5.

Step 18. Plug blower power cord into wall outlet.

Step 19. Position gas control power switch to the “ON” position. Step 20. Verify proper blower operation.

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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 Cast Iron Burner Air Shutter Adjustment Burner Inspection and Air Shutter AdjustmentAir Shutter Nut 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 OrificeVolt potential exposure. Use caution Exhaust Pressure Switch TestingMaking voltage checks to avoid personal injury 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 Thermal Well Testing Gas Control TestingIf Control has gone into TCO lockout due to 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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