Manuals / Bradford-White Corp / Household Appliance / Water Heater

Bradford-White Corp U1TW60T*FRN Control Timings, Wiring Diagram, Specifications, Page

Models: U1TW40SFRN U2TW65TFRN UTW450S60FRN U1TW60TFRN UTW465S60FRN U1TW50SFRN U2TW50T*FRN

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Specifications

	Control Timings
Ignition State				Timing
Pre-purge	15 seconds
Trial for Ignition	90 seconds
Flame Stabilization Period	3 seconds
Inter-purge	15 seconds
Flame Failure Response Time	1.5 seconds (2 second maximum, 1 second minimum)
Post-purge	15 seconds
PS Fault Delay (failed open/close)	Retry after 2 minutes
Soft Lockout	Retry after 5 minutes
TCO Limit Lockout	Indefinite (see page 34 to reset)
Verify Resistive Delay	Retry after 2 minutes (repeats 5 times)
Simulated Resistive Load Lockout	Indefinite (cycle power to reset)
Hardware Error Lockout	Indefinite (self clears if fault clears for at least 15 seconds)
	Wiring Diagram
	BLOWER			BLOWER
	BLOWER			BLOWER
	TEMPERATURE			MOTOR
	SWITCH
				M
	PRESSURE	G		BL
	SWITCH W		Y	BL
	SWITCH W		Y
		W	R

	BK	Y
PILOT	G	Y
	G

WHoneywell

	PLUG
BK
BKBK
G W RY
BK BL	WATER TEMPERATURE
	SENSOR
RESETTABLE	FLAMMABLE
THERMAL	VAPOR SENSOR

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Bradford-White Corp U1TW60T*FRN, UTW450S60FR*N Control Timings, Wiring Diagram, Specifications, Page, Ignition State

Contents

UTW450S60FR*N UTW465S60FR*N Denotes Warranty Years SERVICE MANUALTroubleshooting Guide and Instructions for Service To be performed ONLY by qualified service providersTable of Contents SectionPage DANGER FAILURE TO INSTALL AND MAINTAIN A NEW, LISTED 3/4” X 3/4” TEM Introduction The Bradford White ECO-DEFENDER Safety SystemIntroduction How to Use this Manual How to Use this ManualHow the Safety System Works Tools Required for Service Tools RequiredPage Specifications40 Gallon-40,000 BTU/hr 50 Gallon-40,000 BTU/hr Vent TablesSpecifications Page48 Gallon-60,000 BTU/hr 65 Gallon-60,000 BTU/hr SpecificationsVent Tables PagePage Wiring DiagramControl Timings SpecificationsNormal Heating Sequence Power Up SequenceSequence of Operation Sequence of Operation Normal Heating Sequence cont’dAbnormal Operation Sequence of Operation Abnormal Operation cont’dAbnormal Operation cont’d 4. Trial for Ignition FaultSequence of Operation Abnormal Operation cont’d 5. Flame Sensing FaultSequence of Operation Probable Cause TroubleshootingService Procedure PageLED Status TroubleshootingService Procedure PageLED Status TroubleshootingService Procedure PageBurner Inspection Burner MaintenanceBurner Cleaning Procedure Burner Maintenance Burner Cleaning Procedure cont’dBurner Cleaning Procedure cont’d Pilot MaintenancePilot Inspection, Testing and Replacement Pilot Maintenance Pilot Inspection, Testing and Replacement cont’dPage Pilot Inspection, Testing and Replacement cont’d Pressure Switch TestingPressure Switch Testing Page Pressure Switch Testing cont’dPressure Switch Testing Pressure Switch Replacement Pressure Switch ReplacementBlower Testing Blower TestingPage Blower TestingBlower Testing cont’d Blower Removal Blower ReplacementBlower Installation Blower Temperature Switch Testing Blower Temperature Switch TestingBlower Installation cont’d Common causes for high exhaust temperature Blower Temperature Switch Testing cont’dBlower Temperature Switch Testing Switch SettingBlower Temperature Switch Replacement Blower Temperature Switch ReplacementThermal Well Testing Thermal Well TestingDetermine Water Temperature Inside Tank Determine Tank TemperatureThermal Well Testing cont’d Page Component DisassemblySensor Resistance at Various Temperatures Gas Control & Thermal Well Removal From Water HeaterGas Control Removal From Thermal Well Gas Control RemovalGas Control & Thermal Well Removal From Water Heater cont’d Gas Control Removal From Thermal Well cont’d Gas Control AssemblyGas Control Assembly to the Thermal Well Gas Control Assembly Gas Control Assembly to the Thermal Well cont’dGas Control Assembly to the Thermal Well cont’d Flammable Vapor Sensor TestingFlammable Vapor Sensor Testing 115 VAC Circuit TracePage 115 VAC Circuit TracePage Safety Circuit Voltage TraceSafety Circuit Voltage Trace Blower Removal Remove the Blower to Gain Access to the Flue BaffleDip Tube Inspection Remove the Blower to Gain Access to the Flue Baffle cont’dDip Tube Inspection and Replacement Anode Inspection Anode Inspection and ReplacementInner Door Removal Inner Door Removal ProcedureInner Door Gasket Replacement Procedure Inner Door Gasket ReplacementInner Door Removal Procedure cont’d Inner Door Installation with Gasket Inner Door InstallationScreenLok Flame Arrestor Cleaning Procedure Arrestor CleaningCommon Terms Common TermsPart Name and Description Parts ListPage Email parts@bradfordwhite.com techserv@bradfordwhite.com

Control Timings

Ignition State

Timing

Wiring Diagram