Bradford-White Corp B4 warranty Heater Does Not Come On, Testing the Transformer

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Copper Brute B4 Volume Water Heaters

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The following tools are required for proper service and problem diagnosis of the heater and heating system.

1.Gas pressure test kit with range from 0 to 14 inches (0 to 356 mm) W.C.

2.Electric meter(s) with the following ranges:

a.0 to 500 volts VAC

b.0 to 2000 ohms ()

c.0 to 20 microamps (mA)

d.0 to 50 millivolts (mV)

3.A pressure gauge and a thermometer with proper ranges for heater operation.

5.2.1 Heater Does Not Come On

Important: Disconnect power to the heater or pull the RED wire off the transformer secondary before removing or replacing any component or wire connection.

WARNING

If power is not disconnected, jumpering gas valve or accidental grounding of the wire harness, or component terminals to the heater frame or jacket could cause the ignition control fuse to blow or may cause the heater to fire, resulting in injury or property damage.

1.Make sure the heater has been properly installed.

2.Make sure the pump is not airlocked, clogged or otherwise inoperative.

3.Make sure the gas valve is on and there is gas pressure in the line.

4.Check all electrical connections and wiring. Finding a loose connection or a charred wire can save a lot of time and money.

5.Check the fuse inside the black, twist-lock fuse holder. If it is burned, replace it with a 2-amp fuse (Part No. E0084400). If there is a short, the cause of the short must be found and repaired. Do not jumper or bypass the fuse.

6.Make sure the electrical circuit to the heater is on.

7.Make sure the toggle switch on the right side of the heater is on.

8.Make sure the temperature control is set high enough to call for heat.

9.Make sure the manual reset on the safety controls (e.g., low water cutoff, hi-limit switch, etc.) has not tripped. If it has, reset it.

If the pump is circulating water, and the rest of these items check out all right, the trouble could be in the heater control system.

Caution

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

5.2.2 Testing the Transformer

NOTE: Keep the pump running.

Testing the transformer requires an AC voltmeter with a 50 volt (V) range. Test the transformer using the following procedures:

1.Clip a lead from the voltmeter to the yellow wire terminal on the transformer.

2.Touch the other lead to the red wire terminal (see Figure 37). The voltmeter should read 24 to 28VAC.

3.If the voltmeter does not show voltage, check the electrical power supply.

4.If the voltage is less than 20VAC, the electrical circuit to the heater may be supplying less than 103VAC. This could be due to high pump load or air conditioners or other appliances on the circuit.

Figure 37. Testing the transformer.

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Contents Copper Brute Table of Contents Technical Assistance WarrantyGeneral Information IntroductionField Assembly Installation InstructionsInstallation Information Outdoor InstallationSite Location Combustion and Ventilation Air Supply Flooring Typical InstallationExhaust Fans or Vents MethodOutdoor Air Supply Indoor Air SupplyReversible Water Connections Venting of Combustion ProductsWater Flow General InformationHeat exchanger reversal Front Pump Requirements Water ChemistryFreeze Protection Water HardnessCold water application Hot water supply with vertical tank Water Pressure Storage Tank InstallationPressure Buildup in Water System Pressure Relief ValveGas Supply and Piping Thermal Circulation of Hot WaterGeneral Instructions Normal Operating Sequence Electrical WiringOperating Instructions Combined Space Heating/Potable Water Heating SystemsIgnition System no Sizes ON/OFF with EM2 18BRADFORD White Ignition System no Sizes ON/OFF with EM2ON/OFF with Em2 Ignition System no SizesPump W Relay LOW Water CUT-OFF Optional Power Switch Start-Up Procedure Setting the Temperature ControlsRemote Water Heater Temperature Control Hi-Limit Switch Checkout Shut-Down ProcedureInternal Water Heater Temperature Control Maintenance Replacement of Gas ControlsGeneral Instructions Gas valve/burner replacement Inspecting the Heat Exchanger Cleaning the Heat ExchangerChecking the Manifold Regulated Gas Pressure Electrical TroubleshootingGas Pressure Tests Checking the Main Line Gas PressureHeater Does Not Come On Testing the TransformerTesting the Fusible Link Flame roll-out switch Testing the Electrical Power SupplyTesting the Manual Reset Hi-Limit Switch Testing the Flow SwitchTesting the Fuse Testing the Ignition Control for spark ignitionTesting the High Voltage Ignition Lead Testing the Pilot Thermocouple for standing pilot Testing the Safety Shutoff for standing pilotTesting the Safety Shutoff For automatic pilot Testing the Igniter ElectrodeOn-Off Main Burner Cycling Testing for Burner Ignition For standing pilotTesting the Terminal Strip/ External Controls Heater Will Not Shut OffBradford White

B4 specifications

Bradford-White Corp B4 is a remarkable water heater that embodies innovation, efficiency, and reliability. This product is designed to meet the stringent demands of both residential and commercial applications, making it a versatile choice for various users.

One of the standout features of the Bradford-White B4 is its high-efficiency operation. With advanced insulation technologies, this water heater minimizes heat loss, allowing it to perform efficiently while conserving energy. This efficiency translates to significant cost savings on utility bills, making the B4 an economical option over its lifespan.

Moreover, the B4 employs a robust and durable construction. Engineered with top-quality materials, it boasts a glass-lined tank that prevents corrosion and extends the longevity of the unit. This durable design ensures that users can rely on their water heater for many years, thus reducing the frequency of replacements and repairs.

The Bradford-White B4 is equipped with state-of-the-art technologies to enhance user convenience. Among these technologies is the ICON System, which features an advanced gas control. This control system allows for precise temperature management and ensures optimal performance. Additionally, the B4 comes with a built-in diagnostic system that provides insight into the operation of the unit, helping users identify potential issues before they escalate.

Another significant characteristic of the B4 is its variety of sizes and configurations. This versatility allows for easy installation in different spaces, whether it be a compact utility room or a larger commercial setup. Available in various capacities, the B4 can efficiently deliver hot water for various needs, catering to families of different sizes or businesses with diverse requirements.

Safety is also a top priority for Bradford-White. The B4 includes safety features such as a temperature and pressure relief valve, which acts as a safeguard against potential malfunctions. This adds an extra layer of peace of mind for users concerned about operational safety.

In summary, the Bradford-White Corp B4 combines high efficiency, durable construction, advanced technologies, versatility, and safety features. This makes it more than just a water heater—it is a dependable solution for ensuring hot water availability for various applications. Whether for a home or a commercial setting, the B4 represents a commitment to quality and performance that users have come to trust.
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