1.GENERAL

1.1Description of the appliance

Construction of the water heater is in accordance with the European standard for gas heated water storage heaters for sanitary application (EN 89). The appliance thus meets the European Directory for Gas Appliances and is therefore entitled to carry the CE- marking. It is an open flued appliance without ventilator and with a flue gas down draught safeguard (category B11BS). The water heater is suitable for a maximum working pressure of 8 bar. The water-heater tank is manufactured from low carbon sheet steel and is glass-lined on the inside. In addition the tank is fitted with a sacrificial anode as an extra protection against corrosion. A thick PU-insulation layer covered in a steel jacket reduces unnecessary heat loss. When the appliance is filled with water it continuously is under water pressure. As hot water is drained from the tank, cold water is added immediately. Four flue baffles has been placed in the flue tube to improve heat transfer. The flue gasses pass their heat on to the water by means of radiation and convection. The flue gasses are guided to the chimney via the draught diverter. The exhaust of the flue gasses is realized by natural thermal draught (see drawing 1).

Dead legs on a hot water installation are undesireable. Where possible they should be avoided. Where the inclusion on the system of a dead leg is unavoidable the following restrictions should be applied:

-for pipes not exceeding 19 mm. inside diameter; maximum lengh of dead leg permitted 12.0 metres;

-for pipes exceeding 19 mm. but not exceeding 25 mm. inside diameter; maximum length of dead leg 7.5 metres;

-for pipes with an inside diameter

exceeding 25 mm. maximum dead leg 3.0 metres.

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A.O. Smith EQ 380 G, EQ 280 G manual General, Description of the appliance
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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.
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