Temperature Regulation

HOTTER WATER CAN SCALD: Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the infirm, or physically/mentally disabled. If anyone using hot water in your home fits into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using the lowest possible temperature setting that satisfies your hot water needs, a means such as a mixing valve, should be used at the hot water taps used by these people or at the water heater. Mixing valves are available from your local plumbing contractor. Follow manufacturer’s instructions for installation of the valves. Before changing the factory setting on the thermostat, see Figure 6.

Never allow small children to use a hot water tap or to draw their own bath water. Never leave a child or handicapped person unattended in a bathtub or shower.

It is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the water temperature thermostat be set for the lowest temperature which satisfies your hot water needs. This will also provide the most energy efficient operation of the water heater.

KEEPING THE THERMOSTAT SETTING AT 120°F (49°C)

OR LOWER WILL REDUCE THE RISK OF SCALDS.

Figure 6 shows the approximate time-to-burn relationship for normal adult skin.

TEMPERATURE ADJUSTMENT

To change the temperature setting:

The white knob on the front of the water heater is the temperature control. When the “OFF” mark is aligned with the raised indicator arrow, the water heater is off. Turn the knob clockwise to increase the temperature, and counterclockwise to decrease the temperature. The knob is marked with circular indentations of increasing size. The larger the indentation, the higher the temperature setting. See Figure 6. The temperature range of this water heater is 68°F at the lowest setting and 150°F at the maximum setting. This water heater is shipped in the “OFF” position. Adjust the dial to the desired temperature.

TEMPERATURE SETTINGS

It is recommended that the dial be set lower whenever possible.

Temperature		Time to Produce 2nd & 3rd
Temperature		Time to Produce 2nd & 3rd
Setting		Degree Burns on Adult Skin
150°F (66°C)		About 1-1/2 seconds
140°F (60°C)		Less than 5 seconds
130°F (54°C)		About 30 seconds
120°F (49°C)		More than 5 minutes

	FIGURE 6.

AOSRE50400 specifications

A.O. Smith AOSRE50400 is a high-efficiency water heater that exemplifies advanced technology and engineering, making it a popular choice for residential and commercial applications. This model is part of A.O. Smith’s comprehensive line of water heating solutions and is designed to provide reliable performance while maximizing energy efficiency.

One of the standout features of the AOSRE50400 is its high energy factor (EF), which greatly contributes to reduced energy bills and a smaller environmental footprint. With an EF rating of approximately 0.95, this water heater utilizes innovative design techniques to ensure that more of the energy consumed is converted into usable hot water. It meets and often exceeds the stringent energy efficiency standards set by the Department of Energy.

The AOSRE50400 is equipped with advanced insulating materials, which minimize heat loss and improve overall efficiency. This is particularly beneficial in maintaining water temperature for extended periods, reducing the need for excessive reheating. The tank has been designed with a glass-lined interior that offers enhanced durability and resistance to corrosion, extending the lifespan of the unit.

Another important characteristic of the AOSRE50400 is its large capacity. With a tank size of 50 gallons, it can effectively meet the hot water demands of medium to large households or businesses. This capacity allows for simultaneous usage across multiple outlets, ensuring that you never run out of hot water when you need it most.

The digital display and user-friendly interface provide homeowners with easy control over temperature settings and operation modes. This feature enhances user convenience and allows for customized hot water delivery that can cater to specific usage needs. Furthermore, the built-in diagnostic system alerts users to any potential issues, ensuring timely maintenance and reducing the risk of costly repairs.

A.O. Smith also prioritizes safety in the design of the AOSRE50400. It comes with multiple safety features, including a temperature and pressure relief valve, which helps prevent potential overpressure situations. This commitment to safety ensures peace of mind for users and compliance with local plumbing codes.

In summary, the A.O. Smith AOSRE50400 water heater exemplifies modern engineering and technology, offering high energy efficiency, a durable design, user-friendly controls, and a strong commitment to safety. Its large capacity and advanced features make it an exceptional choice for those seeking reliable and efficient hot water solutions.