Operating Instructions, Electrical Wiring

Internet Version for Reference Only

Page 16	BRADFORD WHITE

11.Before operating the heater, test the complete gas supply system and all connections for leaks using a soap solution.

Caution

Since some leak test solutions (including soap and water) may cause corrosion or stress cracking, rinse the piping with water after testing.

2.7.2 Special Precautions for Propane Gas

Liquefied petroleum (LP) gas is heavier than air. Therefore, do not install heaters using LP gas in a pit or locations where gas might collect. Locate heaters a safe distance from LP gas storage and filling equipment. Consult local codes and fire protection authorities about specific installation restrictions.

2.8 Electrical Wiring

WARNING

Electrically ground the heater in accordance with the latest edition of the National Electrical Code, ANSI/NFPA 70. In Canada, use C22.1. Do not rely on the gas or water piping to ground the metal parts of the heater. Often, plastic pipe or dielectric unions isolate the heater electrically. Service and maintenance personnel who work on or around the heater may be standing on wet floors and could be electrocuted by an underground heater.

1.Check heater wiring and pump for correct voltage, frequency, and phase. Check to make sure heater is wired for 120 volts alternating current (VAC). If 240 VAC, contact local factory representative or Bradford White.

2.Wire the heater and pump exactly as shown in the wiring diagram supplied with the heater. See Figure 26 and 27 for a typical example of a wiring diagram.

3.Electrically interlock the pump and heater so the heater cannot come on unless the pump is running.

4.Connect all field-installed devices (draft switches, relays, timers, outdoor temperature reset devices, etc.) to the heater wiring at points labeled Field Interlock (see Figures 26, 27, 28 and 29).

2.9Combined Space Heating/Potable Water Heating Systems

2.9.1Combined Space Heating

NOTE: These systems are not allowed in the

Commonwealth of Massachusetts.

Piping and components connected to this water heater for the space heating application shall be suitable for use with potable water.

Toxic chemicals, such as used for boiler treatment, shall not be introduced into the potable water used for space heating. Do not use solder containing lead in the potable water lines.

This water heater when used to supply potable water shall not be connected to any heating system or components(s) previously used with a non-potable water heating appliance.

When the system requires water for heating at temperatures higher than required for other uses, an anti-scald mixing or tempering valve (see Figure 25) shall be installed to temper the water for those uses in order to reduce scald hazard potential. Some jurisdictions may require a backflow preventer in the cold water line. In such cases, the temperature and pressure relief valve may discharge water due to expansion. A diaphragm type expansion tank will normally eliminate this condition. Follow the manufacturer's instructions for installation of the expansion tank.

SECTION 3.

Operating Instructions

3.1 Normal Operating Sequence

NOTE: Safe lighting and other performance criteria were met with the gas manifold and control assembly installed on the heater during tests specified in ANSI Z21.13.

Mixing Valve

	Out —
Hot Water	Mixed Water
Hot Water	For Potable Use
From Water Heater
or Storage Tank

Cold Water

Supply

Figure 25. Installation of tempering valve.

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.