Bradford-White Corp UTW465S60FR*N, UTW450S60FR*N, U2TW50T*FRN, U2TW65T*FRN Blower Testing

Page 29

Blower Testing

Blower Testing (cont’d)

Does blower

Y

Disconnect pres-

Connect manome-

energize within

 

sure switch tub-

ter to pressure tap

2 minutes?

 

ing from blower

of blower (see

 

 

(see photo 3).

photo 3).

Remove exhaust

Disconnect ventadapter system from top of

blower and remove vent adapter (see photo 5).

N

3

Does blower energize after 2 minutes, run for 30 seconds and shut down?

N

Disconnect cord set in photo 9. Is there 115VAC across termi- nals shown in photo 11?

N

Is there

115VAC at wall outlet?

Y

Check power cord

for damage.

N

Replace blower.

Pressure tap.

4

Pressure

switch tubing

Y

See pressure

Determine volt-

N

 

switch testing

age problem and

 

 

correct.

 

 

on page 25.

 

 

 

 

 

 

6

 

Y

Is there

Y

115VAC

 

across termi-

 

 

 

 

nals shown

 

 

in photo 7?

 

N

Incorrect supply voltage polarity.

N

Determine

Replace cord

N

power source

 

set.

 

 

problem and

 

 

 

 

 

correct.

 

 

YRepair or replace

power cord.

5

With blower running and

Y

 

exhaust adapter removed

Blower OK.

from top of blower, is there

 

a negative pressure of –

 

2.15” to –2.30” W.C.

 

N

 

Is there 115VAC across blue

Y

Replace blower.

and green wires (see photo 8).

 

7

 

Reconnect cord set shown in photo 4. Y Is there 115VAC

between blue wire Replace blower. and ground wire

(see photo 8).

N

Green ground

Blue wire

 

 

 

 

wire

 

Does cord set have electrical continuity?

Y 8

Shown with pressure

Replace gasswitch removed control.

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Contents Service Manual Table of Contents Page Page Introduction Bradford White ECO-DEFENDER Safety SystemIntroduction How to Use this Manual How to Use this ManualHow the Safety System Works Tools Required Tools Required for ServiceSpecifications Gallon-40,000 BTU/hr Gallon-42,000 BTU/hr Vent TablesGallon-60,000 BTU/hr Ignition State Timing Wiring DiagramControl Timings Normal Heating Sequence Power Up SequenceSequence of Operation Abnormal Operation Normal Heating Sequence cont’dAbnormal Operation cont’d Sequence of Operation Sequence of Operation Probable Cause Service Procedure TroubleshootingLED Status Control Status Probable Cause Service Procedure Troubleshooting Burner Inspection Burner MaintenanceBurner Cleaning Procedure 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 TestingBlower Testing 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’dSwitch Setting Blower Temperature Switch Replacement Blower Temperature Switch ReplacementThermal Well Testing Thermal Well TestingDetermine Water Temperature Inside Tank Determine Tank TemperatureThermal Well Testing cont’d Gas Control & Thermal Well Removal From Water Heater Component DisassemblySensor Resistance at Various Temperatures Gas 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 to the Thermal Well cont’d VAC Circuit Trace Flammable Vapor Sensor TestingFlammable Vapor Sensor Testing VAC Circuit Trace Safety Circuit Voltage Trace Safety Circuit Voltage TraceBlower 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 ListParts@bradfordwhite.com Techserv@bradfordwhite.com

U1TW40S*FRN, U2TW65T*FRN, UTW450S60FR*N, U1TW60T*FRN, UTW465S60FR*N specifications

Bradford-White Corp has long been a reputable manufacturer in the water heating industry, known for delivering high-quality and reliable products. Among their diverse range of water heaters, the U1TW40S*FRN, U1TW50S*FRN, U1TW60T*FRN, UTW465S60FR*N, and UTW450S60FR*N models stand out for their advanced features and technologies designed to meet varying hot water demands.

The U1TW series, including the U1TW40S*FRN, U1TW50S*FRN, and U1TW60T*FRN models, are well-suited for residential applications. Each model provides different capacities, with the numbers referring to the gallon capacities. The U1TW40S*FRN offers 40 gallons, the U1TW50S*FRN 50 gallons, and the U1TW60T*FRN 60 gallons, making them ideal for households varying in size and hot water requirements.

These models are equipped with Bradford-White's advanced Vitraglas® tank lining, a unique feature that provides superior protection against corrosion and extends the unit's lifespan by ensuring the inner tank remains free from damage. Additionally, their efficient heating elements and optimal insulation minimize heat loss, enhancing energy savings.

The UTW series, specifically the UTW465S60FR*N and UTW450S60FR*N, feature innovative technologies such as a durable stainless steel construction that offers robust performance while resisting the harmful effects of rust and degradation. This is particularly beneficial in areas with hard water, where mineral buildup can be problematic.

Each unit incorporates Bradford-White's signature HydroBurner® technology, which enhances combustion efficiency, ensuring that the water is heated quickly and consistently. This technology also helps in reducing greenhouse gas emissions, addressing environmental concerns while maintaining optimal performance.

In terms of ease of use, all models come with user-friendly controls that allow for easy temperature adjustments and monitoring, ensuring that users can customize their hot water needs conveniently. Additionally, features such as intuitive diagnostics enable quick troubleshooting, reducing downtime and maintenance efforts.

In conclusion, Bradford-White’s U1TW and UTW series water heaters are engineered to offer efficiency, durability, and user-friendly operation. With their advanced technology, excellent insulation, and robust construction, these models are a solid choice for anyone looking to invest in reliable hot water solutions for their home. Whether for a busy family or more modest hot water needs, these units provide peace of mind and consistent performance.
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