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Figure 38. Testing the manual reset hi-limit switch.

5.2.3Testing the Electrical Power Supply

The electrical components operate with supply

voltage ranging from 103 to 126VAC at 60 Hertz (Hz). To test the electrical power supply:

1.Measure the voltage at the hot and neutral connections inside the heater electrical junction box.

2.Voltage outside of the required range may be due to poor wiring connections, to other loads (e.g., air conditioners, compressors) on the circuit,

to high pump load, or to an electrical utility company problem.

5.2.4 Testing the Manual Reset

Hi-Limit Switch

To test the manual reset hi-limit switch (see Figure 38):

1.Touch the other lead of the voltmeter to both terminals of the manual reset hi-limit switch. The voltmeter should read 24 to 28VAC at both terminals.

2.If no voltage is detected at one terminal, reset the manual reset hi-limit switch by pressing the reset button. Check the temperature setting.

3.If after pressing the reset button there is still no voltage indicated at one terminal, replace the manual reset hi-limit switch. An open switch may indicate excessive water temperatures or improper setting.

BRADFORD WHITE

5.2.5 Testing the Flow Switch

The flow switch is a safety device that senses water flow through the heater. When the switch senses adequate water flow, it closes, allowing the heater to fire. If the water flow is too low, the switch remains open and prevents the heater from firing regardless of the temperature control setting.

The flow switch is factory mounted and wired. Never attempt to repair the flow switch. If the flow switch is found to be defective, replace the flow switch. To test the flow switch:

1.Remove cap from flow switch.

2.Touch a voltmeter lead to each terminal of the flow switch.

3.If the voltmeter reads voltage at each of the terminals, the switch is good.

4.If there is no voltage at one terminal, it indicates an open switch. Check flow switch paddles to determine if they are broken, missing or frozen. Replace the flow switch.

5.2.6 Testing the Fusible Link

(flame roll-out switch)

The fusible link is a thermally fusible element which shuts down the heater if it detects excessive temperatures inside the heater flue collector compartment. To test the fusible link (flame roll-out switch, if installed):

1.Touch the voltmeter lead to the lower terminal on the terminal block (see Figure 39).

Red

Yellow

 

Figure 39. Testing the fusible link.

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Bradford-White Corp B4 warranty Testing the Electrical Power Supply, Testing the Manual Reset Hi-Limit Switch
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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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