Vitocal 222-S 8 kW split air-water heat pump with integrated DHW tank

Overview and features
The heat pump features many advanced technologies that improve its performance and longevity, such as a variable speed, compliant twin scroll compressor, and corrosion-resistant heat exchanger.
Users can control the pump using its built-in 7” LCD interface featuring a menu in Bulgarian and English.
Optionally, the pump can be equipped with the Vitoconnect communication interface, enabling network connectivity and allowing integration with the ViCare smartphone app.
The outdoor unit is remarkably quiet, emitting only 35 dB(A) at 3 meters away, meaning the pump will not disturb your or your neighbour’s comfort.
The heat pump uses refrigerant R32, which makes it safe and environmentally friendly. The Viessmann Vitocal 222-S 8 kW heat pump is manufactured in Germany.

Application
The Vitocal 222-S 8 kW is designed with new homeowners in mind. It is an excellent option for customers looking for a reliable and efficient heat pump system for year-round air conditioning and domestic hot water.
Ideally, the model should be used for buildings with underfloor heating but is also compatible with water radiators thanks to the high output temperature of the water (up to 60°C at -15°C ambient air temperature).

Design and working principle
The indoor unit is freestanding and is installed inside the building and connects to the heating system (radiators/underfloor heating) and the outdoor unit.
Heat pumps work similarly to a refrigerator - both use the so-called reverse Carnot cycle. The refrigerant continuously circulates in the cooling loop, changing from liquid to vapour and back, and in the process, it transfers heat from the evaporator to the condenser.
Depending on whether heating or cooling is required, the heat pump can reverse the direction of the refrigeration cycle, either transferring heat from outside inside or from inside outside.

The Viessmann Vitocal 222-S air-water heat pump uses a spit configuration, meaning it has a separate indoor and outdoor unit.
The indoor unit houses the 190 L hot water tank, the pump for the heating circuit, the heat exchanger, the three-way switch, the expansion valve, the safety valve, an integrated inline heater, and the LCD that controls the device.

The outdoor unit should be installed outside, either freestanding or mounted on an exterior wall of the building.
A fan in the outdoor unit sucks in air from the environment through the heat exchanger (evaporator), taking some of the heat from the ambient air in the process.
In the evaporator, some of the heat energy from the ambient air is transferred to the refrigerant.
The compressor drives the refrigeration circuit, and by compressing the refrigerant, its temperature can be increased until it is hot enough to be useful for heating and domestic hot water.

For more information, please refer to the manufacturer’s documentation, which is available for download on this page.