What sets the Vitocal heat pumps apart?
All Vitocal heat pumps from Viessmann are characterised by very quiet operation, with low vibrations and low maintenance. In addition, they have an impressively high coefficient of performance (COP). This describes the ratio of heat transfer to power consumption. The higher this value, the more efficiently the heat pump works.
Vitocal heat pumps operate quietly due to the sound-optimised, low vibration appliance design. The Vitocal 200-S and 222-S split heat pumps are distinguished by extremely quiet indoor units. With these two models, the refrigerant circuit is split between two units. The evaporator and compressor are housed in the outdoor unit. The condenser, on the other hand, is located in the indoor unit.
In addition, many models can be installed close to the living space, as they do not take up a lot of room. This is what marks out the Vitocal 333-G and 222-G compact units in particular. The footprint of the former, for example, is less than half a square metre.
Ideal for combining
Vitocal heat pumps can also be combined with existing heating systems that still run on oil or gas. The boilers already in place are tasked with covering peak loads. The rest of the time, the Vitocal heat pumps provide heating and hot water.
Vitocal heat pumps can also be combined with a photovoltaic system. The self-generated electricity is used to power the heat pump. This is because, in addition to environmental energy (about three quarters), around one quarter electricity must be supplied so that the heat pump can convert the ambient energy into usable heat. With the special Vitocal function, the refrigerant, which serves as the transfer medium, has to be both compressed and then expanded again. Compressors and expansion valves are used for this. They require electrical energy. You can find out how this works in detail here: How a heat pump works.
May be used for cooling
In addition to heating and hot water, Vitocal heat pumps can also provide cooling. A distinction must be made between natural cooling and active cooling. In the case of the former, brine or groundwater extract heat from the heating circuit via a heat exchanger. This heat is transferred outdoors. The natural ambient temperature is then used for cooling. It should be emphasised that only the circulation pump and control unit remain switched on during this process. All Viessmann brine/water heat pumps use this form of cooling. An accessory is required for the integral cooling function: the NC-Box. The NC-Box is equipped with a mixer for integration into the cooling circuit. This enables continuous operation without falling below the dew point.
Another option is active cooling. Here, the function of the heat pump is reversed. The Vitocal then functions like a refrigerator. In addition to the Vitocal 200-S and Vitocal 222-S split heat pumps, the 200-A and 222-A are also equipped with circuit reversal.
Both cooling versions are combined via the Viessmann AC-Box, which can be used to extend the Vitocal 300-G brine/water heat pump. Depending on the required room temperature, the system switches automatically.
Flexible application options
Vitocal heat pumps offer flexible use with their different output stages and modulating operation. This means they are not just suitable for newly built detached houses, but also apartment buildings or even small commercial premises. The Vitocal 350-G high temperature heat pumps are ideal for larger existing buildings that are equipped with radiator heating systems. This is because they provide high flow temperatures of up to 70 degrees Celsius. Accordingly, they can also be used very effectively in the modernisation of detached houses and apartment buildings.
It is also possible to increase the heating output and cooling capacity by creating what is known as a cascade. This means that several Vitocal heat pumps from the same model series can be connected in series. For example, an output of up to 589 kW can be achieved with the Vitocal 300-G by using the integral cascade function.
For more sizeable residential or apartment buildings, it is possible to install large Viessmann heat pumps. For example, a Vitocal 300-G/-W Pro achieves up to 240 or 290 kW. If several of these models are in turn connected in a cascade, an output of up to 1450 kW is feasible. They are therefore also suitable for commercial enterprises and local authority premises.