Search A203
The A203 is a heating controller for 3 circuits (two heating circuits and one hot water circuit). Wiring
and configurating selections define what is seen on the display screen.
The A203 is a heating controller for 3 circuits (two heating circuits and one hot water circuit). Wiring
and configurating selections define what is seen on the display screen.
SYSTEM SUPPORT (Ouman Flexiot system)
SERVICE & TECHNICAL SUPPORT (Ouman unit controllers)
Versatile remote control possibilities
The A203 offers versatile remote control and monitoring possibilities. Ounet is an online monitoring system intended for professionals to manage larger properties and larger real estate masses. The A203 also has a built-in local web server. The local web user interface is a cost-effective and easy way to connect a single control device to the internet. No separate additional devices are needed to establish an Internet connection – it’s enough that a working internet connection is available for the device. You can draw the graphic images yourself via the Web interface.
Furthermore, it is naturally possible to control the A203 using traditional text messages. Receiving and acknowledging alarms can also be done via text messages. SMS control requires the purchase of a GSM modem (additional equipment) and a mobile connection.
Extensive alarm features
Typical under- and over-temperature, sensor failure, as well as temperature deviation and freezing danger alarms are available in the A203. Additionally, the controller can also handle network pressure alarms with external information, as well as heating pump alarms with either conflict alarms or direct alarm information. The double pump function can also be activated, in which case two pumps can be used alternately in the heating circuit so that one starts if the other pump fails and gives a conflict/alarm message.
Takes property differences into account
The deceleration function of the controller’s outdoor temperature measurement takes into account the structural differences of the properties. In fast outdoor temperature fluctuations, the controller works according to the average outdoor temperature for a longer period of time. If underfloor heating is selected as the heating method, predicted temperature measurement can be used for flow water control. Typically, a 2-hour anticipation time is used (the time can be set in maintenance mode). The controller takes into account the rate of change of the outside temperature in the flow water control.
Easy commissioning
In the commissioning menu, the desired control circuits are enabled and the most important choices related to the use of the controller are made. Based on the selections, the controller offers setting values that are a good starting point for more precise object-specific fine-tuning.
Graphic trend display helps tuning
The A203 shows the trends of temperature changes graphically, making it easier to understand the adjustment process. The trend display helps the controller installer, especially in tuning situations.
For water-circulating heating systems:
- Radiator heating
- Floor heating
- Ventilation pre-tuning
- Adjusting domestic hot water
For different heat generation methods:
- District heat exchangers
- Boiler plants
- Storage applications
- District heating plants
