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Turning up the heat – remotely

Ouman Finland’s EH-203 control system enables users to operate and monitor their heating systems, as well as other household systems, simply and economically via their mobile phone. Combining a comprehensive range of functions and ease of use, the EH-203 can monitor everything from a single home to a group of apartment buildings heated by a variety of systems and fuels.
Ouman Finland Oy

Using his or her mobile phone and the Ouman EH-203 regulator, a home-owner or building manager can access heating-related measurement data, set system values, and read and modify control modes and relay functions – all without actually visiting the site in question. Alarms are handled in the same way.

In addition to controlling indoor temperature and other parameters, an Ouman system also enables users to lock outside doors, turn ventilation units on or off, and control when lights are switched on or off.

A short text message, based on key words, is sufficient to switch heating at a holiday home from an energy-saving cycle to a normal cycle, for example. The same can be achieved using the system’s graphic user interface, if users prefer.

Combining a comprehensive range of functions and ease of use, Ouman products are capable of monitoring everything from a single home to a group of apartment buildings – all via a mobile phone.

Keeping a check on things

A total of 11 simultaneous temperature measurements can be connected to an Ouman regulator and monitored remotely. Usage data on between three and six parameters, such as district heat consumption and water usage, can also be connected, as well as three valve controls. Two relays can be used to control equipment such as pumps for circulating heating water, door locking, and lighting.

A variety of on-off data can be handled, covering areas such as flooding, excess cold, the current level in a heating oil storage tank, whether a circulation pump’s thermal circuit breaker has been tripped, and burglar alarm status. The relevant data links simply need to be hooked up to a regulator’s digital inputs and labelled using the system’s text editor.

Alarms indicating sensor faults, system overheating, and the risk of a system freezing up are included as standard features. Alarm data is transferred to a mobile phone in the form of an SMS message detailing the situation, or can be displayed and responded to via the system’s user interface.

Reducing room temperature when you leave for your holiday, and raising it again when you are due to return, can be handled easily.
> Martti Jokelainen
(Published in High Technology Finland )