Vitocal 300-G (42 kW)

Brine/Water Heat Pump

Brine-water heat pump with water/water operation capability with intermediate brine circuit.

Rated heat output: 21.2 - 117.8 kW
High productivity thanks to two-stage design
Up to 428 kW cascade
Master/slave capability

Environmentally Responsible Heat Pumps – Find out more about the different options and benefits!

Rated Heating Power for Brine/Water Handling

21.2 - 42.8 kW (single-stage) and 42.4 - 85.6 kW (two-stage)

Rated heating power for water/water operation

28.1 - 58.9 kW (single-stage) and 56.2 - 117.8 kW (two-stage)

High heating power

With two-stage design

Power up to 428 kW possible

In the cascade scheme

Master/Follower Work

Also possible with Vitocal 350-G

Low operating costs due to high performance factors

Efficiency Factor (COP) according to EN 14511 up to 4.8 (brine 0 °C/water 35 °C)

High Flow Temperatures

Up to 60 °C

Mono Operation

Possible for heating and hot water

Maximum efficiency at every work point

Thanks to the innovative refrigerant cycle diagnostics system with electronic expansion valve

Low noise and vibration

Thanks to the sound-optimal design of the device

Easy-to-use Vitotronic control unit

With plain text and graphic display

Vitoconnect Web Interface

For operation and maintenance via Viessmann apps (accessories)

Smart Grid Capabilities

Ready for the future

Self-generated energy consumption

Thanks to preparation for optimized electricity consumption from photovoltaic systems

Easier handling

Thanks to small and lightweight modules

Vitocal 300-G is ideal for large detached houses and apartment buildings.

The Vitocal 300-G heat pump (21.2 to 85.6 kW) uses renewable heat from the ground or groundwater

The Vitocal 300-G is ideal for large detached homes and multi-family buildings. It uses the heat that’s right on your doorstep, either with a single-stage brine/water heat pump with a capacity of 21.2 to 42.8 kW or with a water/water heat pump with a capacity of 28.1 to 58.9 kW – each tailored to your specific heat needs.

For apartment buildings or applications that require very high performance, the two-stage, Vitocal 300-G, which operates on a master/slave basis, is suitable. It can provide a heat output of 42.4 to 85.6 kW (brine/water) or 56.2 to 117.8 kW (water/water). You also have the choice between groundwater or earth as your preferred heat source.

If this power is not enough, up to five master/slave combinations can be connected using the stage function integrated in the control unit, which allows you to increase the power to 589 kW (water/water).

At the heart of the Vitocal 300-G is the powerful Compliant scroll compressor. This component is characterized by a high degree of operational safety and reliability. In combination with large heat exchangers and an integrated refrigerant collector, Vitocal 300-G achieves high COP and flow temperatures of up to 60 °C.

The sealed housing and particularly clever design of the instrument reduce the noise level of the Vitocal 300-G, which far exceeds expectations in this power range.

RCD stands for Refrigerant Cycle Diagnostic System. It provides constant monitoring of the refrigerant circuit in the Vitocal 300-G and, in combination with an electronic expansion valve, guarantees the highest level of efficiency at every operating point.

Especially when the heat demand is high, the Vitocal 300-G is the first choice, as several heat pumps can be connected via heating supply and return. This not only ensures the required high heating capacity, but also increases the operational reliability of the entire system. The modular design with separate compressor circuits ensures a particularly high level of efficiency in part-load operation and allows the simultaneous use of DHW and district heating.

With three power sizes, in master or master/slave versions, the Vitocal 300-G offers various combinations that can be precisely matched to the required thermal demand. For higher heat demands, the Vitocal 300-G can operate in master/slave mode with another heat pump of the same type or with the Vitocal 350-G. A combined master/slave system, such as Vitocal 300-G for the required heat load and Vitocal 350-G for high flow temperatures for DHW heating, allows you to optimally match heat pumps to your property right from the design stage.

The availability of various versions and the possibility of adjusting the size according to the needs allows you to optimize operating time and cost-effectiveness. The master module controls the slave module. By combining different power sizes, users of the system have the opportunity to match the environmentally responsible heating system to their specific heat needs in the most efficient way using different modules.

The EHPA quality mark serves as a confirmation of COP (coefficient of efficiency). The German EHPA Quality Mark Committee has confirmed that the Viesmann Vitocal 300-G heat pump meets the requirements of the EHPA quality mark.

Carsten Kuhlmann explains where environmental energy comes from and how different types of heat pumps use it.

Integrated range of solutions for Vitocal 300-G

Benefit from value-added and digital services from Viessmann's integrated range of solutions.

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Funding professional

The Viessmann FörderProfi service streamlines and simplifies the entire subsidy process, from application to payment.

The ViCare app

The ViCare app provides intuitive heating control. Green for go - the user can see at a glance in the app whether their heating system is working as it should.

The ViGuide app

ViGuide is an application for sales partners. It has numerous functions for monitoring and managing systems in both detached and multi-family houses, as well as providing quick access to the technical service.

Vitoconnect

Vitoconnect is the interface between the boiler and the app - a prerequisite for controlling the heating system via smartphone and tablet. It also enables remote system maintenance for contractors via the Vitoguide app.

wibutler

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Product details

Rated Heating Power (kW)*	Type BW/BWS 301.A21: 21.2 kW \| Type BW/BWS 301.A29: 28.8 kW \| Type BW/BWS 301.A45: 42.8 kW \| *Complies with EN 14511, B0/W35, 5 K spread
ε Efficiency (COP)*	Type BW/BWS 301.A21: 4.7 \| Type BW/BWS 301.A29: 4.8 \| Type BW/BWS 301.A45: 4.6 \| *B0/W35
Energy efficiency class*	A++ / A++ \| *In accordance with Commission Regulation (EU) No 813/2013 for heating, the average climatic conditions are low temperature (W35)/medium temperature (W55) applications.
Energy efficiency class, hot water heating	–
Applications	Detached houses, semi-detached houses, apartment buildings, commercial enterprises, local government premises, new construction and modernization projects.
Surgery	Vitotronic 200 control unit with text and graphic display; can be controlled via the ViCare app
Hot water heating	An additional DHW cylinder is required, which provides a high level of DHW convenience.
Additional features	Free cooling function with optional NC unit; Active cooling function with optional AC unit.
Product cross-section

ServiceConnect Commercial

The innovative service concept gives Viessmann’s sales partners an additional advantage when working with commercial customers and local authorities thanks to full service from a distance.