1. Turn “OFF” the electric power supply to the water heater.
2. Remove the outer door. Remove or fold up the insulation pad.
3. A. Models with lower thermostat without high limit: Lift out the tab as shown below to unclip the terminal cover from the thermostat. The terminal cover can now be removed from the thermostat.
FIGURE 10.
B. Models with Upper or Lower Thermostat with High Limit: Lift out the tab as shown below to unclip the terminal cover from the thermostat. The terminal cover can now be removed from the thermostat.
FIGURE 11.

4.Disconnect wires from thermostat and slide out of the bracket.

5.Remove the thermostat from behind the thermostat bracket.

6.Place the new lower thermostat in the bracket making sure it fits firmly against the tank.

7.Attach the wires to the new thermostat.

NOTE: Some of the terminals may require straight-in wiring through an eye-opening. If wires are now looped, recut and strip wire 3/8” to a straight length and insert.

8.Put plastic terminal cover back in place.

9.Replace the insulation to cover the thermostat.

10.Replace outer door then turn the electric power on.

ELEMENT CLEANING / REPLACEMENT

NOTE: These instructions are written for element cleaning and element replacement for the lower element.

To remove the element from the tank in order to clean or replace it:

1.Before beginning turn “OFF” the electric power supply to the water heater.

2.Turn off the water supply to the water heater at the water shut-off valve or water meter, see Figure 12.

FIGURE 12.

3.Attach a hose to the water heater drain valve and put the other end in a floor drain or outdoors. Open the water heater drain valve. Open a nearby hot water faucet which will relieve pressure in the water heater and speed draining.

FIGURE 13.

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A.O. Smith ECL-30, EJC-30, EJCN-40, ECT-80, ESTT-30, ESTT-40, ECT-52, ECT-66, ECS-30, ECLN-40, 6-119 Element Cleaning / Replacement
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ECL-30, ECT-55, ECT-40, ECT-52, ECT-80 specifications

A.O. Smith is a well-respected name in the water heating industry, renowned for its innovative products and technologies. Among its notable offerings are the EJCN-40 and ECLN-40 electric water heaters, as well as the ECS-50 model. These units exemplify A.O. Smith's commitment to efficiency, durability, and user convenience.

The A.O. Smith EJCN-40 is a reliable and efficient electric water heater with a 40-gallon capacity. It features a foam-insulated tank that ensures minimal heat loss, allowing for increased energy efficiency. This model is equipped with two heating elements, providing faster recovery times and ensuring a steady supply of hot water when needed. The EJCN-40 is designed with a user-friendly thermostat that facilitates easy temperature adjustments, enhancing overall user experience.

Similarly, the ECLN-40 shares many features with the EJCN-40 but is specifically designed for commercial applications. This model prioritizes performance and energy efficiency, making it ideal for businesses that require a dependable hot water supply. The ECLN-40 is built with an impressive heat exchanger that maximizes heat transfer, minimizing energy consumption while maintaining optimal performance.

The A.O. Smith ECS-50 stands out with a 50-gallon capacity, catering to residential and light commercial settings. This unit features a high-quality glass-lined tank, which not only provides superior insulation but also helps prevent corrosion. The ECS-50 is designed with a heavy-duty anode rod that extends the life of the tank by minimizing the risk of rusting. Its compact design allows for versatility in installation, while the integrated thermostat provides ease of use.

A.O. Smith's water heaters are equipped with advanced safety features, including automatic temperature controls and pressure relief valves, ensuring safe operation. Additionally, these models come with Energy Star certification, indicating their compliance with strict energy efficiency standards.

In summary, the A.O. Smith EJCN-40, ECLN-40, and ECS-50 water heaters combine cutting-edge technology with robust design to deliver efficient, dependable hot water solutions. With features that cater to both residential and commercial needs, A.O. Smith continues to set the standard for quality and performance in the water heating industry.
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