Bradford-White Corp 900kW, 9kW service manual High Water Temperature Limit Control

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NOTE: The control values

programmed into memory will not be lost

because of a power failure.

ERROR MESSAGES DISPLAYED BY THE ELECTRONIC TEMPERATURE CONTROL

There are seven error messages that can be displayed in response to software or hardware problems with the boiler’s internal electronic temperature control. The error codes that may be seen flashing on the display are:

OE - ROM Error

The internal ROM of the microprocessor in the boiler’s electronic temperature control is defective. This error cannot be field repaired. Replace the water heater’s electronic temperature control.

AE - RAM Error

The internal RAM of the microprocessor in the boiler’s electronic temperature control is defective. This error cannot be field repaired. Replace the water heater’s electronic temperature control.

SF - Sensor Failure

The display flashing SF indicates an out-of-range or defective sensor. Make sure sensors are properly installed, wired and connected to the control. Correct sensor installation or replace sensor.

EF- EEPROM Failure

The values read form the EEPROM are not the same as the values written into the EEPROM. This error cannot be field repaired. Replace the water heater’s electronic temperature control.

CF - Calibration Failure

The calibration resistor reading was not within the range of the Analog to Digital converter. This error cannot be field repaired. Replace the water heater’s electronic temperature control.

OF - Stray Interrupt Failure

An unused interrupt occurred. This error cannot be field repaired. Replace the water heater’s electronic temperature control.

CE - Configuration Error

The device hardware was configured to a nonexistent device. This error cannot be field repaired. Replace the water heater’s electronic temperature control.

HIGH WATER TEMPERATURE

LIMIT CONTROL

FIG. 21

High Water Temperature Limit Control

 

- Fixed Setting

The unit is equipped with a fixed setting, manual reset high water temperature limit control. The water heater temperature limit control has a fixed limit setting of 195° F (90.6° C). If water temperature exceeds the limit set point, the limit will break the control circuit and shut down the unit. The limit control can only be reset after the water temperature has cooled below the set point of the limit. The high water temperature limit control is mounted on the surface of the tank, above the heating element installed at the highest point in the tank. The high limit control is reset by pushing the red reset button on the control. Operation of the limit control usually indicates a major problem with the thermostat, contactors or heating elements. Do not continue to push the

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Contents Special Instructions To Owner WarrantyCHP-I&S-01 Checking EquipmentContents Front View Vertical Round Models Codes Installation Procedure Location of UnitOwner Warning ApprovalsPage Clearances from Combustible Construction Table a Clearances from Combustible ConstructionMounting Water ConnectionsThermal Expansion of Water Storage TankRelief Valve Do not plug or cap the relief valveCathodic Protection Electrical ConnectionsJacket Assembly Never turn on the electricStandard Equipment Optional Equipment Components and Controls Terminal BlockFuse and Flue Blocks ContactorsControl Circuit Transformer Immersion Thermostats Temperature RegulationWater Temperature Settings Hotter water increasesTemperature Adjustment Maximum temperatureElectronic Temperature Control Sequencer Operating Humidity 5 95% RH SpecificationsOperating Ambient Temperature -30 to 125 F Select and Enter Keys simultaneouslySetup of the Temperature Controller DisplayProgramming Worksheet When power is initially ProgrammingHigh Water Temperature Limit Control Disconnect the main power Immersion Heating ElementLOW Water Pressure Switch High Water Pressure SwitchTime Clock Optional START-UP Procedure Left in the open position when the water heater is in useFilling the Water Heater START-UP Initial START-UP ChecksTemperature and Pressure Relief Valve Operation Shutdown ProcedureMaintenance Draining the Water HeaterSediment Removal Water ChemistryFlushing the Storage Tank Sediment and Lime Scale RemovalGaskets are available from your distributor Trouble Shooting If YOU Cannot Identify or Correct the Source Malfunction

9kW, 900kW, Commercial Electric Water Heaters specifications

Bradford-White Corporation has established itself as a leader in the water heating industry, providing a diverse range of innovative and efficient water heating solutions. Among its prominent offerings are the 900kW and 9kW Commercial Electric Water Heaters. These models have been designed for a variety of commercial applications, ensuring reliability, performance, and energy efficiency.

The 900kW Commercial Electric Water Heater is specifically engineered for large-scale applications that require significant hot water outputs. This powerhouse can effectively support high-demand environments such as hotels, restaurants, and industrial facilities. One of its standout features is its high-efficiency design, which maximizes hot water production while minimizing operational costs. The heater employs advanced technology to increase thermal efficiency, which in turn reduces energy consumption and lowers utility bills.

This model also features a robust heating element configuration that ensures rapid recovery rates. With multiple heating elements strategically placed within the tank, the 900kW unit can maintain consistent water temperatures even during peak usage hours. Additionally, it is equipped with advanced controls that facilitate precise temperature management, further enhancing user convenience and system performance.

On the other side, the 9kW Commercial Electric Water Heater is ideal for smaller businesses or applications where space and hot water demand are more constrained. This model is compact yet powerful, capable of efficiently delivering hot water for various tasks such as handwashing, cleaning, and food preparation. Its compact design allows for flexible installation options, making it suitable for tight spaces without compromising performance.

Both models incorporate corrosion-resistant tank materials and durable insulation to ensure longevity and reliable operation over time. The integrated safety features, including high-temperature limit switches and automatic shut-off mechanisms, provide users with peace of mind regarding operational safety.

Furthermore, Bradford-White prioritizes sustainability in its product lines. Both the 900kW and 9kW Commercial Electric Water Heaters comply with stringent efficiency regulations, making them eco-friendly options for businesses looking to reduce their carbon footprint.

In summary, Bradford-White’s 900kW and 9kW Commercial Electric Water Heaters represent the perfect fusion of performance, efficiency, and reliability, catering to diverse commercial needs while promoting sustainability and cost-effectiveness in water heating solutions.
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