Bradford-White Corp U4TW50TFRN, U4TW40TFRN, U4TW60T*FRN Parts List, Part Name and Description

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						Parts List
				2
						40
		9	12	3
		9	12
		10	13			1
			13	4

		11
		11		14
				5		7
						7
	28				6
	27			15
				15
				26		33
				26
				32		34	35
		23		31		34	35
25		23		31
25				20
				20
				21			36
				30			36
				30
	24
	22	19			37
	22			38
	18			38
	18			18
	16
				39
			17
			18
		18
		29
		18				29
						29
			Part Name and Description
	1. Blower Complete		15.	T&P Valve	29.	Burner Assembly
	2. Air Mixing Inlet		16.	Outer Door	30.	Flexible Gas Feedline
	3. Pressure Switch		17.	Right Side Inner Door	31.	Thermal Switch
	4. Blower Temperature Switch		18.	Screw #10-12 x 3/4”	32.	Screw #8-18 x 1/2”
	5. Blower Gasket		19.	Brass Drain Valve	33.	Burner
	6. Blower Power Cord		20.	Flammable Vapor Sensor Clip	34.	Pilot Assembly
	7. Vent Adapter w/ Vent Term.		21.	Flammable Vapor Sensor	35.	Screw #8-18 x 1/2”
	8. Condensate Hose Kit		22.	Flammable Vapor Sensor Harness	36.	Pilot Orifice
	9. Heat Trap Outlet		23.	Thermowell	37.	Manifold Mount
	10. Hot Water Outlet Anode		24.	Gas Control	38.	FVIR Sensor Plate
	11. Flue Baffle		25.	Gas Control Service Tool	39. Orifice
	12. Heat Trap Inlet		26.	3/4” NPT Pipe Plug	40.	Dilution Air Clip
	13. Inlet Dip Tube		27.	ASSE Approved Mixing Valve
	14. Wire Harness		28.	Kit—Heat Trap Insert

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Contents Service Manual Table of Contents Page Page Introduction Bradford White ECO-DEFENDER Safety SystemHow the Safety System Works How to Use this ManualTools Required Tools Required for ServiceSpecifications Gallon Vent TablesSpecifications Control Timings Wiring DiagramPower Up Sequence Sequence of OperationNormal Heating Sequence Abnormal Operation Normal Heating Sequence cont’dAbnormal Operation cont’d Sequence of Operation Sequence of Operation LED Status Control Status Probable Cause Service Procedure TroubleshootingTroubleshooting Troubleshooting Burner Maintenance Burner Cleaning ProcedureBurner Inspection Burner Cleaning Procedure cont’d Pilot Inspection, Testing and Replacement Pilot MaintenancePilot 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 Switch Setting Blower Temperature Switch Testing cont’dBlower 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 TraceBlower Removal Remove the Blower to Gain Access to the Flue BaffleRemove the Blower to Gain Access to the Flue Baffle cont’d Dip Tube Inspection and ReplacementDip Tube Inspection Anode Inspection Anode Inspection and ReplacementInner Door Removal Inner Door Removal ProcedureInner Door Gasket Replacement Inner Door Removal Procedure cont’dInner Door Gasket Replacement Procedure Inner Door Installation with Gasket Inner Door InstallationScreenLok Flame Arrestor Cleaning Procedure Arrestor CleaningCommon Terms Common TermsPart Name and Description Parts ListParts@bradfordwhite.com Techserv@bradfordwhite.com