1.3Operating menu

E0: Factory default

If the system does not function as expected, even though the set points have been adjusted, and the cause is impossible to locate, it is

recommended to note down the settings in the schedule. Thereafter the set point must be adjusted to 1 and wait until the control returns to standard settings. Now all the set points have been changed to the factory default. It is now possible to start all over and adjust the set points.

Factory setting: 0

E2: T9 set temperature

This sensor is able to control the relay R9, which will be activated when the set- point E2 is reached. The R9 relay can be used to control the three way damper of the exhaust air. This three way damper can supply the living area with cool air, if the room temperature reach the setpoint E2. For this function you will need a separate sensor, which is not a within the standard delivering. The sensor shall be connected to the control panel. For access to the control panel you have to dismantle the top of the machine.

E2 can be set between 10-30°C

Factory setting: 21°C

E8: Disinfection function ON/OFF

By setting the point to 1, the electric cartridge will provide 65°C hot water, once a week, in order to disinfect the tank (legionella protection function).

Factory setting: 0

E9: Operating in cold surroundings ON/OFF

If the setting is 0, the heat pump will run as long as there is a need of heat (= exhaust air-operation).

Using the heat pump when taking the admission air from e.g. the cellar, there is an option of making the compressor stop in case the room is getting to cold. Instead, the electric heater will heat the water. The function is activated when the value has been set to 1 (= circulating air-operation).

It is also possible to automatically let the electrical heater help heating the water when the intake air temperature is below the temperature set in E10. The function is activated when the value has been set to 2 (= fresh air operation). If the value is 0, the function is not active.

Factory setting: 0

E10: Operating in cold surroundings

When activating the function menu E9, the temperature at which the compres- sor will stop, or the heater will assist, may be set. The temperature is adjustable between –10 and +10°C.

Factory setting: -5

E15: Hygrostat / stop unit

If the value is 0, the speed of the fans will change to 3 when the relative humidity is above the preset value of the hygrostat. If the value is 1, the unit will stop when the clips 25 and 26 are short-circuiting.

Factory setting: 0

E16: Min. airflow

This value shows the minimum speed at which the fan is permitted to run when operating. Notice that the cooling system may be overloaded,

resulting a drop out of the high-pressure switch, if the value has been set too high. The value should not be chosen higher than necessary, in order to secure a minimal airflow through the cooling coil. Adjust this value between 0-100%. Factory setting: 0

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A.O. Smith 290 service manual
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290 specifications

The A.O. Smith 290 is a prominent water heater designed to elevate the standards of residential and commercial hot water solutions. This product exemplifies A.O. Smith's commitment to innovation, efficiency, and durability in the water heating industry.

One of the key features of the A.O. Smith 290 is its impressive energy efficiency. Equipped with advanced insulation technology, the unit minimizes heat loss, thus reducing energy consumption and lowering utility bills. This energy-efficient design makes it an environmentally friendly choice for users looking to cut down on their carbon footprint while enjoying reliable hot water.

The A.O. Smith 290 operates using either natural gas or propane, offering versatility depending on the user's preference or availability of resources. Its robust heating system allows for quick recovery rates, ensuring that households or businesses have an ample supply of hot water, even during peak usage times. This capability is particularly beneficial for larger families or establishments requiring significant amounts of heated water for various applications.

Durability is another distinguishing characteristic of the A.O. Smith 290. Built with high-quality materials, this water heater is subjected to extensive testing to ensure it can withstand the rigors of daily use. The unit features a corrosion-resistant tank that prolongs its lifespan and reduces the likelihood of leaks, providing peace of mind to users who demand reliability from their appliances.

Furthermore, the A.O. Smith 290 integrates cutting-edge technology for enhanced usability. It comes equipped with a user-friendly digital thermostat that allows for precise temperature control, enabling users to set their desired water temperature while ensuring safety. In addition, safety features such as a pressure relief valve and thermal shutdown provide added protection for both users and the system itself.

The compact design of the A.O. Smith 290 allows for easy installation in various spaces, making it a versatile option for different settings. Whether installed in a crawl space, utility room, or closet, it efficiently delivers consistent hot water without taking up excessive space.

In conclusion, the A.O. Smith 290 stands out in the market for its energy efficiency, versatility, durability, and advanced technology. It represents a smart investment for anyone in need of reliable hot water, combining performance and efficiency while ensuring user safety and convenience. With its user-centric features, it is suited to meet the demands of modern living, making it a preferred choice among homeowners and businesses alike.
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