2.6Setting the nominal heat input

The gas control has been factory preset to the water heater nominal heat input.

A further check of the burner pressure should be carried out during the commissioning of the unit after installation. The following procedure should be followed.

1.Remove the protruding cover screw on the right side of the gas control block and connect a U-gauge manometer to the outlet.

2.Put the appliance into operation and ignite the burner.

3.Check the burner pressure and, if necessary, reset by means of the adjusting screw “pr adj” (pressure adjustment; see drawing 9). To make this possible the temperature control knob should be removed by pulling it

straight forward, making the “pr adj” visible. Turning clockwise reduces the pressure; turning anti clockwise increases the pressure. It is recommended to check the heat input by means of the gas meter.

4.Turn off the appliance and remove the manometer hose and replace the adjusting screw.

5.Relace the thermostat control knob.

6.Put the appliance into operation.

2.7Converting to another type of gas

For conversion of the appliance

from natural gas to another type of gas, or vice versa, it is necessary to exchange the pilot injector and the main injector. The conversion may only be executed by a qualified competent person.

Drawing 9 - Setting the nominal load

17

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A.O. Smith EQ 280 G, EQ 380 G manual Setting the nominal heat input, Converting to another type of gas

EQ 280 G, EQ 380 G specifications

A.O. Smith EQ 380 G and EQ 280 G are high-performance water heaters known for their innovative features and advanced technologies. These gas water heaters offer homeowners reliability, efficiency, and durability, making them ideal choices for various residential applications.

The EQ 380 G model is designed to handle high-demand situations, with a striking first-hour delivery rate of up to 80 gallons. This ensures that households with high hot water usage, such as those with multiple bathrooms or large families, have adequate supply at all times. The EQ 280 G, while slightly smaller, still provides impressive performance with a first-hour rating that accommodates medium-sized homes.

One of the standout features of both models is their energy efficiency. They are equipped with a high-efficiency gas burner that significantly reduces energy consumption compared to traditional water heaters. The integration of advanced insulation technology minimizes heat loss, ensuring that the water heater operates economically and in compliance with stringent energy regulations. This efficiency not only lowers utility bills but also contributes to a more sustainable environment.

The EQ series incorporates a robust digital control system that allows for precise temperature settings and monitoring. Users can easily adjust the temperature according to their preferences for comfort and safety. Additionally, the intuitive digital display makes it simple for homeowners to keep track of their water heater's performance and system notifications.

Safety is paramount in the design of the EQ 380 G and EQ 280 G. Both models feature an advanced flame arrestor design that helps prevent backdrafting and enhances overall safety during operation. Furthermore, they come equipped with a built-in thermostat and pressure relief valve, ensuring safe temperature regulation and maintaining optimal performance.

Durability is another hallmark of the EQ series. Constructed with high-quality materials, these units come with a 6-year limited warranty, providing peace of mind to homeowners regarding their investment. The tank's glass-lined coating protects against corrosion, ensuring that the water heater remains functional and efficient for years to come.

In summary, A.O. Smith EQ 380 G and EQ 280 G water heaters exemplify outstanding technology and features tailored to meet the needs of modern households. With impressive efficiency, reliable performance, and advanced safety measures, these models stand out in the competitive market of water heating solutions, delivering both comfort and value for homeowners.