Bradford-White Corp U4TW50T*FRN Blower Replacement, Blower Removal, Blower Installation

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in jacket head

Pin location holes

blower flange

Locating pins on

Blower Replacement

Blower Removal

Step 1. Move the gas control power switch to the “OFF” position.

Gas control power

switch

Step 2. Unplug the water heater from the wall out- let.

TTW (water heater) power cord

	Step 3.	Disconnect vent	system
	from exhaust adapter on top of blower.			Remove exhaust
	from exhaust adapter on top of blower.			adapter and retain
				adapter and retain
				for use on new
	Step 4.	Remove exhaust	adapter	blower
	Step 4.	Remove exhaust	adapter

from blower (blade screw driver) and retain for use on new blower.

Step 5. Remove dilution air clip from air in- take boot and retain for use on new blower.

Step 6.	Unplug cord sets from blower.	Blower cord
		Blower cord
Step 7.	Remove the three blower	sets
mounting screws (1/4” nut driver).

Step 8. Remove blower with gasket from water heater.

Blower Installation

Step 9. Clean any debris from jacket head of water heater

Step 10. 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.

Blower mount-

ing screws

Remove dilution air clip and retain for use on new blower

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Contents Service Manual Table of Contents Page Page Bradford White ECO-DEFENDER Safety System IntroductionHow to Use this Manual How the Safety System WorksTools Required for Service Tools RequiredSpecifications Vent Tables GallonSpecifications Wiring Diagram Control TimingsPower Up Sequence Sequence of OperationNormal Heating Sequence Normal Heating Sequence cont’d Abnormal OperationAbnormal Operation cont’d Sequence of Operation Sequence of Operation Troubleshooting LED Status Control Status Probable Cause Service ProcedureTroubleshooting Troubleshooting Burner Maintenance Burner Cleaning ProcedureBurner Inspection Burner Cleaning Procedure cont’d Pilot Maintenance Pilot Inspection, Testing and ReplacementPilot Inspection, Testing and Replacement cont’d Page Pressure Switch Testing Pressure Switch TestingPressure Switch Testing cont’d Pressure Switch Replacement Pressure Switch ReplacementBlower Testing Blower TestingPage Blower Replacement Blower InstallationBlower Removal Blower Temperature Switch Testing Blower Installation cont’dBlower Temperature Switch Testing Blower Temperature Switch Testing cont’d Switch SettingBlower Temperature Switch Replacement Blower Temperature Switch ReplacementThermal Well Testing Thermal Well TestingDetermine Tank Temperature Thermal Well Testing cont’dDetermine Water Temperature Inside Tank Component Disassembly Sensor Resistance at Various TemperaturesGas Control & Thermal Well Removal From Water Heater Gas Control Removal Gas Control Assembly Gas Control Assembly to the Thermal WellGas Control Removal From Thermal Well cont’d Gas Control Assembly to the Thermal Well cont’d Flammable Vapor Sensor Testing Flammable Vapor Sensor TestingVAC Circuit Trace Safety Circuit Voltage Trace Safety Circuit Voltage TraceRemove the Blower to Gain Access to the Flue Baffle Blower RemovalRemove the Blower to Gain Access to the Flue Baffle cont’d Dip Tube Inspection and ReplacementDip Tube Inspection Anode Inspection and Replacement Anode InspectionInner Door Removal Procedure Inner Door RemovalInner Door Gasket Replacement Inner Door Removal Procedure cont’dInner Door Gasket Replacement Procedure Inner Door Installation Inner Door Installation with GasketArrestor Cleaning ScreenLok Flame Arrestor Cleaning ProcedureCommon Terms Common TermsParts List Part Name and DescriptionParts@bradfordwhite.com Techserv@bradfordwhite.com