Bradford-White Corp 900kW, 9kW, Commercial Electric Water Heaters service manual Trouble Shooting

Page 27

TROUBLE SHOOTING

Checklist

Before calling for service, check the following points to see if the cause of trouble can be identified and corrected. Reviewing this checklist may eliminate the need of a service call and quickly restore hot water service.

Not enough or no hot water

1.Ensure that the electrical disconnect switch serving the water heater is in the “ON” position. The pilot switch(es) on the cabinet should also be in the on position. In some areas, water heater electrical service may be limited by the power company. If the heater operates on a controlled circuit, heater recovery may be affected.

2.Check the fuses. The electrical disconnect switch usually contains fuses. The water heater has fuses located behind the cabinet front door. When replacing internal fuses in the water heater control panel, insure that the same type and size of fuse is used.

3.If the water was excessively hot and is now cold, the manual reset high limit may have operated.

To reset, turn off electricity and push the reset button. The high limit is located above the upper most heating element in the storage tank. On some high input models additional hi limits may be located behind the side access panel. Repeat operation of the high temperature cut-off should be investigated by your mechanical contractor or by a qualified technician. A contactor or thermostat may be malfunctioning.

4.The capacity of the heater may have been exceeded by a large demand for hot water. Large demands require a recovery period to restore water temperature.

5.Cold incoming water temperature will lengthen the time required to heat water to the desired temperature. If the heater was installed in the summer when incoming water temperature was warm, colder ground water in the winter months can create the effect of less hot water.

6.Look for wasted hot water and leaking or open hot water faucets.

7.Sediment or lime scale may be affecting water heater operation. Refer to “Maintenance” for details.

Water is too hot

Refer to “Temperature Regulation” and reset the thermostat setpoint to a lower temperature that will meet requirements for hot water

Water heater makes sounds

1.Sediment or lime scale accumulation on the elements causes sizzling and hissing noises, when the heater is operating. If this occurs, the tank bottom and elements should be cleaned. Refer to “MAINTENANCE” for details.

2.Some of the electrical components of the water make sounds which are normal. Contactors will “click” or snap as the heater starts and stops. Transformers and contactors often hum.

Water leakage is suspected

1.Check to see if the drain valve is tightly closed.

2.The apparent leakage may be condensation which forms on cool surfaces of the heater and piping.

3.If the outlet of the relief valve if leaking, it may represent:

a.Excessive water pressure.

b.Excessive water temperature.

c.Faulty relief valve.

27

Page 26 Page 28
Image 27
Page 26 Page 28
Contents Checking Equipment WarrantyCHP-I&S-01 Special Instructions To OwnerContents Front View Vertical Round Models Approvals Installation Procedure Location of UnitOwner Warning CodesPage Table a Clearances from Combustible Construction Clearances from Combustible ConstructionWater Connections MountingDo not plug or cap the relief valve Storage TankRelief Valve Thermal Expansion of WaterElectrical Connections Cathodic ProtectionJacket Assembly Never turn on the electricStandard Equipment Terminal Block Optional Equipment Components and ControlsFuse and Flue Blocks ContactorsControl Circuit Transformer Hotter water increases Temperature RegulationWater Temperature Settings Immersion ThermostatsTemperature Adjustment Maximum temperatureElectronic Temperature Control Sequencer Select and Enter Keys simultaneously SpecificationsOperating Ambient Temperature -30 to 125 F Operating Humidity 5 95% RHSetup of the Temperature Controller DisplayProgramming Worksheet Programming When power is initiallyHigh Water Temperature Limit Control Immersion Heating Element Disconnect the main powerHigh Water Pressure Switch LOW Water Pressure SwitchTime Clock Optional START-UP Procedure Left in the open position when the water heater is in useFilling the Water Heater Initial START-UP Checks START-UPDraining the Water Heater Shutdown ProcedureMaintenance Temperature and Pressure Relief Valve OperationSediment and Lime Scale Removal Water ChemistryFlushing the Storage Tank Sediment 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.
Top Page Image Contents