Bradford-White Corp D4504S*F(BN, D4403S*F(BN, SX) service manual How to Use this Manual

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How to Use this Manual

combustion chamber, the vapors are harmlessly ignited by the burner. If flammable vapors are in sufficient quantity to prevent normal combustion, the flammable vapor sensor recognizes this and shuts down the pilot and main burner. Should the flammable vapors continue to burn, the flame arrestor prevents the flames from traveling backwards and igniting vapors outside of the combustion chamber. And, the resettable thermal switch will open and shut down the pilot and main burner.

How to Use this Manual

It is intended for this manual to be used by qualified service personnel for the primary purpose of troubleshooting and repair of the Bradford White Residential Flue Damper water heaters. Understanding the sequence of operation section of this manual will contribute greatly to trou- bleshooting the water heater.

The Honeywell WV4460E Electronic Gas Control will display error codes in the event of ab- normal operation. Error codes are listed in the troubleshooting chart beginning on page 13 of this service manual. The troubleshooting chart will also indicate the probable cause for the error code and direct the service professional to a service procedure to properly diagnose the abnor- mal operation.

Contact the Bradford White technical support group immediately if diagnosis cannot be made using the methods described in this service manual.

Tools Required for Service

Manometer: A liquid “U” tube type or a digital (magna-helic) type can be used. This device is used to measure gas and/or air pressure and vacuum.

Multi-Meter:A digital type is strongly recommended. This device is used to measure electrical values. The meter you select must have the capability to measure volts AC, volts DC, amps, micro-amps and ohms.

Electronic Probes: In some cases, standard multi-meter probes will damage or simply not be effective to obtain certain voltage and ohm reading. It will be necessary to have special elec- tronic “pin” type multi-meter probes. These probes are available at most electronic wholesale outlets.

Thermometer: Used to measure water temperature. An accurate thermometer is recommended.

Water Pressure Gage: Used to measure water supply pressure. Also used to determine tank pressure by adapting to the drain valve of the heater.

Gas Control Service Tool: BWC part number 239-45991-00. A specialized tool designed to remove the gas control from gas control thermal well. Available from your Bradford White parts supplier.

Various Hand Tools: Pipe wrench, channel locks, open end wrenches (3/8", 7/16", 1/2"), 12" crescent wrench, Allen wrench set, screw drivers (common & Phillips), 1/4" nut driver, pliers (common & needle nose), socket set, side cutters, wire cutters, wire strippers, wire crimpers, torpedo level, small shop vac, step ladder, flashlight, and 5 gallon pail.

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Contents Service Manual Table of Contents Page Page Introduction Bradford White Defender Safety SystemHow the Safety System Works IntroductionHow to Use this Manual How to Use this ManualSpecifications Wiring Diagram Sequence of Operation Power Up SequenceDamper Powered Open Normal Heating SequenceNormal Heating Sequence cont’d Abnormal Operation cont’d Temperature Sensor Fault Damper Safety Circuit FaultTrial for Ignition Fault Abnormal Operation cont’d Flame Sensing Fault Troubleshooting Probable Cause Service ProcedureLED Status Control Status Probable Cause Service Procedure Burner Maintenance Burner Cleaning ProcedureBurner Inspection Right side inner door Main burner Orifice Pilot Maintenance Burner Cleaning Procedure cont’dPilot Inspection, Testing and Replacement Pilot Inspection, Testing and Replacement cont’d Damper Replacement Damper Removal & InstallationDamper Removal & Installation cont’d Thermal 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 & Thermal Well Removal From Water Heater cont’dGas Control Removal From Thermal Well 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 Dip Tube Inspection and Replacement Dip Tube InspectionAnode Inspection and Replacement Anode InspectionRemove the Damper to Gain Access to the Flue Baffle Damper RemovalRemove the Damper to Gain Access to the Flue Baffle cont’d Inner 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 ProcedureDamper Relay Installation Damper Relay Installation Damper Relay Installation cont’dConnect the other ends of the relay harness, as shown Common Terms Common TermsParts List Part Name and DescriptionParts@bradfordwhite.com Techserv@bradfordwhite.com

SX), D4504S*F(BN, D4403S*F(BN specifications

Bradford-White Corp has long been a pioneering name in the water heating industry, and their D4403S*F(BN, D4504S*F(BN, and SX models represent the company’s commitment to delivering high-quality, efficient solutions for residential and commercial applications. These water heaters are designed with various user needs in mind, ensuring that homeowners and businesses can enjoy a reliable hot water supply whenever needed.

One of the core features of these models is their advanced water heating technology. Utilizing power venting systems, these units ensure efficient heat transfer while minimizing heat loss. This technology promotes energy efficiency and helps users save on their energy bills. The power vent system also allows for flexible installation options, accommodating different types of venting configurations, which is especially useful in homes with unique designs or limited space.

The Bradford-White D4403S*F(BN and D4504S*F(BN models are equipped with their state-of-the-art Hydrojet Total Performance System. This feature not only enhances the heater's overall performance but also reduces sediment buildup within the tank, which can significantly extend the unit's lifespan and maintain efficiency over time. Moreover, the patented Vitraglas® lining protects the inner tank from corrosion, further prolonging the life of the appliance.

Safety is a paramount consideration in Bradford-White's design philosophy. Each model includes a robust Flammable Vapor Ignition Resistance (FVIR) system, which helps prevent the ignition of flammable vapors that may be present in the vicinity of the water heater. This feature meets stringent safety standards and provides peace of mind to users.

In terms of energy specifications, both the D4403S*F(BN and D4504S*F(BN models are designed to meet or exceed efficiency standards, contributing to lower energy consumption and environmental impact. The SX model is particularly notable for its user-friendly digital display and controls, allowing for easy temperature adjustments and efficient operation monitoring.

In conclusion, Bradford-White Corp's D4403S*F(BN, D4504S*F(BN, and SX models are a testament to the company’s dedication to quality, safety, and efficiency in water heating technology. With their innovative features, user-friendly design, and long-lasting durability, these water heaters are well-suited to meet the ever-evolving demands of modern households and commercial settings alike. As homeowners and businesses continue seeking reliable hot water solutions, Bradford-White stands out as a trusted choice in the industry.
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