3.Using a flat tip screwdriver, rotate the adjusting knob to the desired temperature setting.

4.Replace the covers and access panels, and turn on heater electrical supply.

Valves for reducing point-of-use temperature by mixing cold and hot water are available (See Figure 5). Also available are inexpensive devices that attach to faucets to limit hot water temperatures. Contact a licensed plumber or the local plumbing authority.

A non-adjustable high temperature limit control operates before steam temperatures are reached. The high limit is in the same area as the upper thermostat and must be reset manually when it operates. BECAUSE THE HIGH LIMIT OPERATES ONLY WHEN ABNORMALLY HIGH WATER TEMPERATURES ARE PRESENT, IT IS IMPORTANT THAT A QUALIFIED SERVICE AGENT BE CONTACTED TO DETERMINE THE REASON FOR OPERATION BEFORE RESETTING.

Once a month the temperature and pressure relief valve should be checked to ensure that it is in operating condition. Lift the lever on the valve several times until the valve seats properly and operates freely.

CAUTION

THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT.

It is recommended that the drain valve on this unit be opened once a month and 1 to 2 gallons of water be allowed to drain out. This will help to prevent sediment buildup in the tank bottom.

ANODE INSPECTION AND REPLACEMENT

This water heater is equipped with a sacrificial anode rod. Anodes protect the glass-lined tank from corrosion by sacrificing themselves through electrolysis. When the anode material is consumed, there is no more protection and corrosion of the tank accelerates.

Inspection of the anode every 6 to 12 months allows you to identify a spent anode and replace it. Replace the anode when its diameter is 3/8" (1 cm) of an inch, or annually which ever is first. Aggressive, very hot and softened water causes rapid consumption of the anode requiring frequent inspections. Anodes are available from your distributor or A.O. Smith.

FIGURE5

DRAINING

If the heater is to be shut down and exposed to freezing temperatures, it must be drained. Water, if left in the tank and allowed to freeze, will expand and damage the heater.

1.Turn off the electrical switch and cold water inlet valve.

•If desired, a hose may be connected to the drain valve to carry the water away.

2.Open a nearby hot water faucet and the heater drain valve.

•Be careful to grasp the drain valve handle in such a way that the hand will not be exposed to hot water.

3.The drain valve must be left open during the shutdown period.

•To restart heater, refer to the foregoing FILLING instructions.

MAINTENANCE

Electric water heater maintenance consists of cleaning the tank and removing lime (or scale) from the heating elements in hard water areas. Tank flushing should be performed monthly. Tank sediment removal and element lime scale removal must be performed when needed as determined by periodic inspections. Your dealer should be contacted for element cleaning. In some instances a hissing sound may be heard as the scale builds up. This noise is normal.

TROUBLESHOOTING

CHECKLIST

Before contacting your dealer, check the water heater to see if the apparent malfunction is caused by some external fault. Consulting this checklist may eliminate the need for a repair call and restore hot water service.

NOT ENOUGH OR NO HOT WATER

1.Be certain that the water heater electrical switch is turned to the ON position.

•In some areas an additional special meter, controlled by a timer, is used to govern the periods electricity is available. If the heater operates on a timed electrical circuit, recovery will be limited to certain hours.

2.Check for loose or blown fuses in the water heater circuit.

3.If the water has been excessively hot and is now cold, the high temperature limit control may have operated. To restore service, contact your dealer or utility company. Refer to TEMPERATURE REGULATION section.

4.The storage capacity of the heater may have been exceeded by large demands of hot water.

5.If the heater was installed when incoming water temperatures were warm, colder incoming temperatures will create the effect of less hot water.

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A.O. Smith del and del warranty Troubleshooting
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del and del specifications

A.O. Smith is a leading manufacturer in the water heating industry, known for its innovative solutions and commitment to energy efficiency. Established in 1874, the company has built a reputation for producing high-quality water heaters for both residential and commercial applications. With a focus on research and development, A.O. Smith incorporates cutting-edge technologies into its products, positioning itself as a pioneer in modern water heating solutions.

One of the main features of A.O. Smith water heaters is their energy efficiency. The company offers a range of ENERGY STAR® rated models, designed to reduce energy consumption and lower utility bills. Their commitment to sustainability is evident in products such as tankless water heaters, which provide hot water on demand while eliminating standby heat loss, a common issue with traditional tank-style heaters.

A.O. Smith emphasizes convenience and performance in its water heating solutions. The company's hybrid electric water heaters, for example, combine traditional heating elements with heat pump technology, capturing ambient heat to heat water more efficiently. This not only provides significant energy savings but also allows for fast recovery rates to meet high hot water demands.

Another notable aspect is the Smart Technology integration found in many of their products. A.O. Smith’s smart water heaters can be connected to Wi-Fi, allowing users to monitor usage, track energy consumption, and receive maintenance alerts via a smartphone app. This level of connectivity adds a layer of convenience and helps homeowners ensure their systems are operating optimally.

Durability and reliability are also hallmarks of A.O. Smith water heaters. They utilize advanced materials and engineering techniques to enhance the lifespan of their products. Features like tank corrosion protection, improved insulation, and innovative venting options contribute to reduced maintenance costs and prolonged product life.

A.O. Smith caters to a diverse range of customer needs with a wide selection of products, including both gas and electric models. From residential systems to large-scale commercial applications, their comprehensive product line ensures that customers can find the right solution tailored to their specific hot water requirements.

In conclusion, A.O. Smith is a forward-thinking company that continues to lead the water heater industry through innovation, energy efficiency, and advanced technology. Their commitment to quality and sustainability makes them a trusted choice for consumers looking for reliable hot water solutions.
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