VARIO fresh-nova

  • domestic hot water heating,
  • the circulation pump control and
  • a parameterizable switching function.

Areas of application

The VARIO fresh-nova appliance series comprises electronically controlled fresh water heaters as individual appliances in six output sizes in the nominal output range from 20 to 80 l/min.

As instantaneous water heaters, they enable hygienic and energy-saving domestic hot water preparation in domestic installations. They are typically supplied with heat by a stratified tank or standard buffer tank.

Generously dimensioned counterflow plate heat exchangers ensure low return temperatures and low pressure losses. The VarCon211 electronic controller uses an adaptive neural network, a method from the field of artificial intelligence (AI), to automatically optimize the control quality for given local operating conditions.

Neural network

Information for fresh water heating is stored and processed. As a result, it is able to “learn” and adapt its behavior to the operating conditions

Integrated circulation pump control

Demand, time and temperature-dependent operating modes.

Models to suit the application

six output sizes in the nominal output range from 20 to 80 l/min.

Domestic hot water heating
The VARIO fresh-nova heats drinking water using the flow-through method. When a hot water tap is opened, the integrated controller registers the flow rate sensor and starts the charging pump at the correct speed. This pumps water from the cylinder through the stainless steel plate heat exchanger in the quantity that exactly covers the heating requirement for hot water preparation. The hot water temperature can be adjusted to demand via 6 switching points per day of the week. Important information for fresh water heating is continuously stored and processed in the controller's neural network. This enables it to “learn” and adapt its behavior to the respective operating conditions.

Circulation mode
The integrated circulation pump control recognizes demand, time and temperature-dependent operating modes. For example, with the „demand-dependent“ option, the circulation pump is started by the brief withdrawal of domestic hot water (shot glass tap). Once the desired temperature has been reached in the circulation return pipe, the pump is switched off again with the „temperature-dependent“ option. In this way, energy saving and convenience can be combined. Here too, the operating modes can be adapted to requirements via 6 switching points per weekday. Ideal for single-family homes.

Parameterizable switching function
The switching function of the VarCon211 compact controller extends the range of functions to include pre-assembled controller variants for storage tank charging or, alternatively, a general thermostat. This allows small control tasks to be implemented, which are often helpful when connecting to the overall system.

The VARIO fresh-nova range of appliances is ideal for use in detached houses to apartment buildings, for new builds and refurbishment of heating systems in terms of hygiene and energy saving. It is also suitable for the decentralization of domestic hot water heating in larger building complexes.

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