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Heating system

Controller instead of clamp terminal

Sorel (Germany) presented the Caleonbox for single-room control of surface heating systems. CAN is used to connect several modules with each other for data exchange.

The Caleonbox heating controller with the Caleon and Caleon Clima color touch room controllers (Photo: Sorel)

The Caleonbox controls the surface heating and cooling system. It manages up to eight heating zones and sets the right room temperature for each zone at every moment. Additional outputs are selectable from a series of extra functions. This includes speed control of the heating pump, modulating a heat source, an alarm function, or weather-compensated control of a mixer. “The functions are not fixed rigidly, but rather provide a broad choice of possibilities to satisfy individual requirements”, as CEO Jonas Bicher explains.

The interplay of Caleonbox and Caleon room controllers ensures a holistic view of the heating systems: given that Caleon not only controls the zone valve, but also influences the flow temperature, the room temperature is reached faster and with higher precision. When connecting several Caleonboxes with each other via a CAN network, for example in multi-family houses or housing blocks, they can exchange information like the outdoor temperature or the heat or cooling demand.

Application in a single-family house with one Caleonbox, two Caleon room controllers for zoning and data logger for Internet connection (Photo: Sorel)

In order to shorten installation times, Sorel uses colored plug-in terminals, which not only facilitate correct assignment of the cables, but are also faster to connect. “For a single-family house, it can take up to one hour with regular terminal screws. In contrast, Caleonbox can be readily wired within a few minutes”, says Bicher. Configuration of the product is done in full text via the TFT touch display of the matching Caleon room controllers. They also provide a user-friendly interface for residents of all ages to set their comfortable temperature, select the heating mode, or set up their personal heating schedule with just a few touches, said the company. Sorel uses a CANopen-based protocol in all their connected devices.

Application in a multi-family house with three apartments, each with a Caleonbox and Caleon room controller as well as central HCC heating controller (Photo: Sorel)

As an option, a central, weather-compensated HCC heating controller can adjust the main flow temperature to the current heat demand of the building. Bicher elaborates: “In that case, the system always supplies just the right amount of energy for what is needed in that very moment”. A data logger can be used to connect every apartment or the whole system with the Internet, in order to turn on the heating from one’s smartphone or to monitor the system status from the PC.

With Caleonbox Clima and Caleon Clima, the user can switch between heating and cooling season. This is often achieved by inverting a heat pump, or activating a separate cooling unit. The integrated humidity sensor enables Caleon Clima to calculate the dew point for every zone and to adapt the flow temperature accordingly, thus preventing moisture problems. In addition, a dehumidifier can be run as well.


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