The Viessmann 200-A is a monobloc type but actually comes with an indoor and an outdoor unit.

The connection between the two is a water carrying line.

The outdoor unit is a compact design with a variable speed scroll compressor

The indoor unit is an instantaneous water heater. It includes a 3-way diverter valve for central heating/DHW heating, a secondary pump, a flow switch and a Viessmann Vitotronic 200 control unit

There are 4 sizes from 4kW to 16kW

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datasheet                   Design Guide