Bradford-White Corp PE2XR504T*F(BN,SX) Abnormal Operation cont’d Temperature Sensor Fault

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Sequence of Operation

Abnormal Operation (cont’d)

2.Temperature Sensor Fault:

A)Temperature Sensor Open Circuit: The gas control immediately turns off all outputs and proceeds to flash 8 times then 3 times with a three second pause. The error self clears if the fault clears for at least 15 seconds.

B)Thermal well sensors not reading the same temperature within ±5.5°F: The gas control immediately turns off all outputs and proceeds to flash 8 times then 3 times with three second pause. The error self clears if the fault clears for at least 15 seconds.

C)Water Temperature in excess of ECO (Energy Cut Off) Limit: The gas control immediately turns off the pilot and main valves. The gas control LED proceeds to flash 4 times with a 3 second pause.

To reset the gas control, rotate the setpoint knob to the minimum setting for at least 6 seconds before returning to desired temperature setting.

3.Safety Circuit Fault:

A)Safety Circuit Failed to Close: The gas control proceeds to flash 3 times with a 3 second pause. The gas control waits 5 minutes, and then tries to energize the relay again.

B)Safety Circuit Failed to Open: The gas control proceeds to flash 2 times with a 3 second pause. The gas control waits 5 minutes, and then tries to de-energize the relay.

4.Trial for Ignition Fault:

A)Relay Fault During Trial: The gas control stops the trial for ignition. The gas control proceeds to flash 3 times with a 3 second pause. The gas control waits 5 minutes, and then tries to energize the relay again.

B)Flame Not Sensed: The gas control energizes the spark igniter attempting to light the pilot and prove flame. If flame is not sensed within 90 seconds, the spark igniter turns off, the pilot valve is closed. The gas control LED flashes 6 times then 1 time with 3 second pause. The control waits 5 minutes before repeating the ignition sequence.

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Contents Service Manual Table of Contents Page Page Introduction Bradford White Defender Safety SystemHow to Use this Manual How to Use this ManualSpecifications SpecificationsControl Timings Relay Energized Power Up SequenceSequence of Operation Normal Heating SequenceNormal Heating Sequence cont’d Trial for Ignition Fault Abnormal Operation cont’d Temperature Sensor FaultSafety Circuit Fault Abnormal Operation cont’d Flame Sensing Fault LED Status Control Status Probable Cause Service Procedure TroubleshootingTroubleshooting Gas Valve / Control Model LED Status Accessory Module Probable Cause Burner Inspection Burner MaintenanceBurner Cleaning Procedure Unscrew the burner from the main burner orifice Pilot Inspection, Testing, and Replacement Burner Cleaning Procedure cont’dPilot Inspection, Testing, and Replacement cont’d Pilot MaintenanceThermal Well Testing Determine Water Temperature Inside Tank Thermal Well TestingThermal Well Testing cont’d Sensor Resistance at Various Temperatures Determine Tank TemperatureDetermine Water Temperature Inside Tank cont’d Gas Control & Thermal Well Removal From Water Heater Component DisassemblyGas Control Removal From Thermal Well Gas Control RemovalGas Control Removal From Thermal Well cont’d Gas Control Assembly to the Thermal WellFlammable Vapor Sensor Testing Gas Control AssemblyGas Control Assembly to the Thermal Well cont’d VAC Circuit Trace Flammable Vapor Sensor TestingFlammable Vapor Sensor Testing cont’d Relay ReplacementRelay Replacement cont’d Relay ReplacementCommon Terms Common TermsPart Name and Description Parts ListParts@bradfordwhite.com Techserv@bradfordwhite.com

PE4403S*F(BN,SX), PE440T*F(BN,SX), PE4503*F(BN,SX), PE2XR504T*F(BN,SX) specifications

Bradford-White Corporation is a renowned manufacturer of water heating and storage products, well-regarded for its commitment to quality and innovation. Among its diverse product lineup, the PE2XR504T*F(BN,SX), PE4503*F(BN,SX), PE440T*F(BN,SX), and PE4403S*F(BN,SX) models stand out for their technology, efficiency, and performance. These commercial electric water heaters are designed for demanding applications, making them ideal for various settings, including restaurants, hotels, and industrial facilities.

One of the most notable features across these models is the use of advanced heating elements, which are engineered to provide rapid recovery and consistent hot water temperatures. This capability ensures that businesses can rely on a continuous supply of hot water, particularly during peak demand periods. The tanks are constructed with high-quality materials that guarantee durability and longevity, reducing the need for frequent replacements.

Another key feature is the digital temperature control system, which allows users to easily set and maintain the desired water temperature with precision. This technology not only enhances user convenience but also contributes to energy efficiency, allowing businesses to operate within sustainable parameters while minimizing energy costs. Additionally, certain models are equipped with Bradford-White’s patented Hydrojet® Total Performance System, which promotes superior tank cleaning and reduces sediment buildup, thereby improving efficiency and prolonging the life of the heater.

Safety is paramount in the design of these units. The incorporation of advanced safety features, including a self-resetting thermal cutoff and a high limit switch, helps protect against overheating. Furthermore, these models are built with a robust insulation system, which reduces heat loss and improves overall energy efficiency.

In terms of versatility, the PE2XR504T*F(BN,SX), PE4503*F(BN,SX), PE440T*F(BN,SX), and PE4403S*F(BN,SX) can be easily integrated into existing plumbing systems. They are available in various capacities and configurations, catering to a wide range of commercial needs. With their combination of cutting-edge technology, reliability, and safety features, these Bradford-White models are an excellent investment for any commercial establishment seeking efficient and dependable hot water solutions.
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