A smart solution for efficient heating control - Ouman A203

The Ouman A203 3-circuit electronic controller is a smart solution for efficient heating control. It compares well with the smart controllers of leading brands. It is compatible with 24 V actuators and temperature sensors from different manufacturers.

The Ouman A203 is very easy to mount on a DIN rail, so installation is simple and quick. Thanks to the integrated WLAN module, all the controller needs is a working internet connection. It also has a Lithuanian-language user interface. The intuitive menu makes configuration and operation easier for both specialists and end users. It ensures the same installation and commissioning standards, and reliable, efficient system operation both locally and when the system is managed remotely over the internet. The integrated local web server gives access to the controller's graphical interface and lets you adapt it to individual needs.

The A203 controller is easy to configure to generate various messages and alarms, for example temperature too low or too high, deviation from setpoints, sensor failure, frost risk and so on. Ouman can also send messages and receive commands as text messages (SMS) using a GSM modem.

The 3-circuit Ouman A203 controller can control 2 heating circuits and 1 domestic hot water circuit. The controller presents information in an intuitive way, and you can see trends in control changes, which makes it easier to understand the control process.

Why choose the Ouman A203?

  • Energy savings and lower bills: the Ouman A203 reduces energy consumption by adjusting heating intensity to the outdoor temperature and the building's needs. This not only lowers your costs but also helps protect the environment;
  • Remote control: monitor your heating system at any time and from anywhere. With remote control you can adjust the temperature and monitor how the heating system is running, simply from a smartphone or computer;
  • Convenience and comfort: ensure an optimal indoor climate without any worry. The Ouman A203 adjusts heating automatically according to ambient conditions and maintains a comfortable temperature throughout the building;
  • Easy installation and use: the Ouman A203 is designed to be easy to integrate into existing heating systems. The user-friendly interface means anyone can configure and operate the system with ease;
  • Reliable Finnish technology: "Ouman" products have earned the trust of users. The A203 is one of the most advanced solutions, meeting the highest quality standards.

A203 technical specifications:

  • Supply voltage: 24 VAC
  • Operating temperature: 0 °C…+40 °C
  • Universal inputs: 16
  • Analogue outputs: 6
  • Digital outputs: 10
  • Protection class: IP20

Ouman A203 user manual in Lithuanian

This article is based on Amegata.lt's hands-on experience. See it differently or have something to add? Write to us – we're happy to discuss, and if you share new, well-founded information, we will update the article. Updated October 2026.

<h2>A smart solution for efficient heating control - Ouman A203</h2> <p></p> <p>The Ouman A203 3-circuit electronic controller is a smart solution for efficient heating control. It compares well with the smart controllers of leading brands. It is compatible with 24 V actuators and temperature sensors from different manufacturers.</p> <p>The Ouman A203 is very easy to mount on a DIN rail, so installation is simple and quick. Thanks to the integrated WLAN module, all the controller needs is a working internet connection. It also has a Lithuanian-language user interface. The intuitive menu makes configuration and operation easier for both specialists and end users. It ensures the same installation and commissioning standards, and reliable, efficient system operation both locally and when the system is managed remotely over the internet. The integrated local web server gives access to the controller's graphical interface and lets you adapt it to individual needs.</p> <p>The A203 controller is easy to configure to generate various messages and alarms, for example temperature too low or too high, deviation from setpoints, sensor failure, frost risk and so on. Ouman can also send messages and receive commands as text messages (SMS) using a GSM modem.</p> <p>The 3-circuit Ouman A203 controller can control 2 heating circuits and 1 domestic hot water circuit. The controller presents information in an intuitive way, and you can see trends in control changes, which makes it easier to understand the control process.</p> <p></p> <p><strong>Why choose the Ouman A203?</strong></p> <ul> <li><strong>Energy savings and lower bills:</strong> the Ouman A203 reduces energy consumption by adjusting heating intensity to the outdoor temperature and the building's needs. This not only lowers your costs but also helps protect the environment;</li> <li><strong>Remote control:</strong> monitor your heating system at any time and from anywhere. With remote control you can adjust the temperature and monitor how the heating system is running, simply from a smartphone or computer;</li> <li><strong>Convenience and comfort:</strong> ensure an optimal indoor climate without any worry. The Ouman A203 adjusts heating automatically according to ambient conditions and maintains a comfortable temperature throughout the building;</li> <li><strong>Easy installation and use:</strong> the Ouman A203 is designed to be easy to integrate into existing heating systems. The user-friendly interface means anyone can configure and operate the system with ease;</li> <li><strong>Reliable Finnish technology:</strong> "Ouman" products have earned the trust of users. The A203 is one of the most advanced solutions, meeting the highest quality standards.</li> </ul> <p></p> <p><strong>A203 technical specifications: </strong></p> <ul> <li>Supply voltage: 24 VAC</li> <li>Operating temperature: 0 &deg;C&hellip;+40 &deg;C</li> <li>Universal inputs: 16</li> <li>Analogue outputs: 6</li> <li>Digital outputs: 10</li> <li>Protection class: IP20</li> </ul> <p></p> <p><a href="https://oumanshop.com/wp-content/uploads/2023/04/XM1582B_A203_manual_LIT_v.1.0.pdf">Ouman A203 user manual in Lithuanian </a></p> <p><em>This article is based on Amegata.lt's hands-on experience. See it differently or have something to add? <a href="mailto:labas@amegata.lt">Write to us</a> &ndash; we're happy to discuss, and if you share new, well-founded information, we will update the article. Updated October 2026.</em></p>

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