Heizen mit Naturwaerme 02-2011_GB.indd - Viessmann

Heating with natural heat

Heat pumps 

Heating and cooling with natural energy 

The purpose of this brochure is to give you detailed information about a progressive and 

environmentally responsible means of generating heat with Viessmann heat pumps. 

Whether you want to use energy from the ground, groundwater or the air, with a heat pump 

you will definitely reduce your consumption of fossil fuels, protect valuable resources and 

lower emissions. 

Your special benefit: Viessmann ground source heat pumps have an additional "dual function" 

benefit. They provide heat in winter and ensure a pleasant atmosphere in summer. With 

their active and natural cooling functions, they bring a refreshing change of air into the house 

on hot days. 

Our wide product range offers you the right heat pump, whatever your needs – depending 

on your own particular plans, your heat demand, and structural and geological conditions. 

What's more, this isn't just suitable for new build. You can also use a Viessmann heat pump 

in a modernisation project, and combine it with an oil or gas heating system if you wish. 

2/3

Contents 

Compliant scroll compressor

About this brochure 

The Viessmann heat pump range offers tailor-made solutions for everyone who considers 

environmentally responsible operation and independence from fossil fuels important in 

central and DHW heating. 

Saving energy and protecting the climate 

Find out why it is worth modernising your heating system now, 

so you can make an active contribution towards protecting the 

climate and use less fossil fuel. 

Heating with heat pumps 

With a Viessmann heat pump, you utilise the potential heating 

energy that nature has placed at your feet. Geothermal heat, and 

heating energy from groundwater and the air are available free 

of charge. 

Cooling with heat pumps 

With the natural and active cooling functions, you can also use 

the heat pump to cool your home on hot days. Furthermore, 

most Viessmann heat pumps are already equipped with this 

function. 

Domestic ventilation system 

An efficient domestic ventilation system does not just ensure 

fresh air and a pleasant atmosphere – it even protects the fabric 

of the building, and recovering latent heat via the Vitovent 300 

saves energy. 

A perfect match: System technology 

Use the most advanced system technology to control your 

heating system. Individual control options via mobile phone, 

internet and PC allow you maximum operating convenience and 

economical operation. 

Accessories – complete heating systems from a 

single source 

You can also trust Viessmann quality when it comes to accessories. 

The comprehensive Vitoset range includes a wide selection of 

radiators, underfloor heating systems, and much more. 

Service for every aspect of heating 

Make the most of our trade partners. They will tell you all you 

need to know about tailor-made heating technology, subsidy 

opportunities and financial options – free of obligation or costs 

to you. 

from page 6 

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4/5

Introduction

Saving energy and protecting the climate 

Viessmann is aware of its responsibility for sustained protection of the environment. 

Its company philosophy and products focus on this. 

"Nothing is so good that it cannot be 

improved". This guideline is also reflected 

in our company principles. In this industry, 

Viessmann can rightfully claim to be the 

leader in quality and technology, and as such, 

aims to continually set new standards. 

Of course, this applies in particular to 

the company's product range, which is 

consistently geared towards significantly 

lowering the consumption of fossil fuels, 

and gradually replacing them with renewable 

sources of energy. 

At around 40 percent, the heating market 

actually accounts for the largest proportion 

of energy consumption in Germany. The rest 

is shared by "goods transport", "personal 

transport" and "power", with 20 percent each. 

These are values that can also be applied, to 

some extent, to other industrial countries. 

Ever-rising energy costs mean that the 

emphasis is on reducing the consumption of 

fossil fuels as quickly as possible and utilising 

these fuels with greater efficiently. 

Natural heat 

The heating system from Viessmann 

Heat pumps should be your first choice if your 

priorities are both to save on heating costs 

and to generate heat in an environmentally 

responsible way. After all, the environment 

gives us an unlimited and free supply of the 

energy a heat pump uses. This fully-fledged 

heating system only consumes little power 

for drives and pumps to make that energy 

available. This makes you independent of 

fossil fuels, and in addition you make an active 

contribution towards reducing CO2 emissions 

and protecting the climate. 

As a pioneer in the field of standard heat 

pumps, Viessmann has been setting 

standards in efficient utilisation of energy and 

longevity of service life with its advanced 

systems for 30 years. This means you also 

benefit from its many years of experience as a 

supplier of comprehensive heating systems. 

Whether for modernisation or new build: 

Viessmann has the right solution for you, too! 

Viessmann offers you energy 

efficient heating systems for 

oil, gas, solar, biomass and 

natural heat. The pictographs 

will help to guide you. 

6/7

Introduction 

Heat pump 

VITOCAL 

Simple principle, great result 

The technical principle of a heat pump is similar to that of a fridge – 

it just works the other way round. 

In a fridge, heat is transferred from the 

inside to the outside. With a heat pump, 

this happens exactly the other way round. 

The heat from outside – for example from 

the ground – is transferred via the heating 

system to the inside, into the living space. To 

raise the temperature, a refrigerant vapour 

is compressed until the temperature for 

central and DHW heating is reached. With 

the Vitocal 300-G and Vitocal 350-A, this can 

even be up to 65 °C. This means this heat 

pump can also be used for modernisation 

projects. 

Highly efficient scroll compressor 

The compression process is vital for the 

efficiency of a heat pump. Viessmann heat 

pumps use a Compliant scroll compressor 

that is comprised of two interlocking spirals 

that continuously compress the refrigerant. 

Compression process 

65 °C 

Ground 

Temperature all year round between 5 and 18 °C (at 2 m depth) 

Getting hotter towards the centre – from an initial 

temperature of between 5 and 18 °C, a flow temperature of 

up to 65 °C is achieved. 

As with a bicycle pump, the temperature also 

rises with increasing pressure. This ensures 

efficient temperature raising from the cold 

side (the heat source on the outside) to the 

hot side (the heating circuit in the building). 

Compliant scroll compressors as used by 

Viessmann is that they operate quietly and 

with low vibrations, are maintenance free and 

extremely durable. 

You won't need to worry about heating 

bills any more 

An investment in a Viessmann heat pump 

will always be worthwhile because you won't 

have to pay for any more fuel from day one. 

From now on, the energy you use to generate 

heat comes free, from right outside your door. 

Furthermore, the power needed to exploit this 

free fuel is very efficiently used. From one 

kilowatt of power, a heat pump can generate 

between 3 and 4 kW of heat. 

A heat pump can make use of the 

following energy sources: 

Air as energy source: 

Practically unlimited availability; lowest 

investment costs 

Ground as energy source: 

Via geothermal collector or geothermal probe; 

very efficient 

Water as energy source: 

Extremely efficient; observe water quality 

Waste heat as energy source: 

Subject to availability, volume and 

temperature level of the waste heat 

The best heat source for each individual case 

depends on local conditions and the actual 

heat demand.

Ground source (collector) 

1 

3 

1 

2 

3 

Vitocal heat pump 2 DHW cylinder 1 Vitocal heat pump 2 DHW cylinder 

1 

1 2 

3 

Heating water buffer cylinder 

Ground source (groundwater) 

Vitocal heat pump DHW cylinder 


2 

3 

Ground source (probe) 

3 


Air source 

1 

1 

1 

3 

Vitocal heat pump 2 DHW cylinder 


2 

2 

3 

3 

8/9

Heat pumps 

VITOCAL 

You can either get annoyed about ever-rising energy prices or make yourself 

independent of fossil fuels, relying on proven technology instead. 

Vitocal heat pumps from Viessmann utilise 

the unlimited, free natural heat in the 

environment. It is unlimited and free. This 

heating technology is amongst the most 

economical and clean of all options for heat 

generation. To ensure that this remains 

the case and that heat pump technology is 

continuously improved and therefore becomes 

even more efficient, Viessmann is putting 

innovative development and improvement at 

the top of its list. Only when the customer is 

satisfied with Viessmann heat pumps can the 

company be satisfied too. 

1982 

First weathercompensated 

heat pump control 

unit for mono and 

dual mode systems 

(Oktamatik) 

1996 

HxR heat 

exchanger 

with swirl 

vane in the 

refrigerant 

circuit 

Patent 

1998 

Heat pump control 

unit with integral 

natural cooling 

function 

First standard 

production 

2002 

Passive house 

Vitotres 343 

storage combi 

boiler 

The right decision with Vitocal 

Compared to conventional heating systems, 

Vitocal heat pumps have many advantages: 

n Utilising environmentally responsible 

energy from natural heat 

n No combustion of fossil fuels 

n Greater independence from rising 

energy prices 

n Optimum combination with solar 

technology 

2003 

2005 

Heat pump with 65 °C 

flow temperature with 

EVI process 

In-house 

development, first 

standard heat pump 

Coated evaporator 

for corrosive media 

Standard since 2005 

for all air source 

heat pumps 

2007 

2008 

Refrigerant distribution 

Registered utility model 

RCD system 

Patent pending 

Electronic expansion 

valve (EEV) 

In series production in 

all 300 series models 

Energy statement 

through RCD system 

First modulating air 

source heat pump with 

a COP of 3.8 with air 

2 °C / water 35 °C and 

digital scroll technology 

2009 

3-D sound concept 

for low noise 

emissions 

Stratified heating 

with PW modulation 

Standard in heating 

centres 

High efficiency pumps 

In the 300 series 

Integral operating 

manual 

Milestones in Viessmann 

heat pump development 

2010 

Split heat pump 

with DC inverter 

technology 

10/11

Product range Heat pumps 

1.5 to 1500 kW 

VITOCAL 343-G/VITOCAL 333-G 

Compact heat pump 

(brine/water) 

Rated heating output: 5.9 to 10.3 kW 

Cylinder capacity: 220 litre, Vitocal 343-G with solar function 

For new build 

Detached houses 

VITOCAL 300-G 

Single stage brine/water heat pump 


Single stage water/water heat pump 


For new build and modernisation 

Detached house/apartment building 

VITOCAL 300-G 

Two-stage heat pump 

(master/slave) 

Brine/water heat pump: 12.4 to 35.2 kW 

Water/water heat pump: 16 to 43.2 kW 


Detached house/apartment building, commercial buildings 

VITOCAL 300-G 

Single stage brine/water heat pump 


Single stage water/water heat pump 




VITOCAL 300-G 

Two-stage heat pump 

(master/slave) 

Brine/water heat pump: 42.4 to 85.6 kW 

Water/water heat pump: 56.2 to 117.8 kW 



VITOCAL 242-G/VITOCAL 222-G 

Compact heat pump 

(brine/water) 

Rated heating output: 5.9 to 10 kW 

Cylinder capacity: 170 litre, Vitocal 242-G with solar function 

For new build, 

Detached house 

Page 14 

Page 18 

Page 18 

Page 22 

Page 22 

Page 24

VITOCAL 200-G 

Brine/water heat pump 


For new build 


VITOCAL 350-A 

Air source heat pump 

(internal or external installation) 



Detached house/apartment building 

VITOCAL 300-A 

Air/water heat pump 

(internal or external installation) 

Rated heating output: 3 to 9 kW, modulating 

For new build 

Detached houses, dual mode systems 

VITOCAL 200-S 

Split air/water heat pump 

Rated heating output: 3 to 10.6 kW 

For new build 


VITOCAL 160-A 

DHW heat pump 

1.52 kW 

Cylinder capacity: 285 litres, 

with and without ventilation function 



Group 

Heat pumps 

up to 1.5 MW 

For heating and/or cooling 

Page 28 

Page 32 

Page 36 

Page 40 

Page 46 

12/13

Heat pumps Vitocal 343-G 

Vitocal 333-G

VITOCAL 343-G 

VITOCAL 333-G NC 

VITOCAL 333-G 

System solutions for detached houses: 

Vitocal 333-G, the compact ground source heat pump with a DHW cylinder 

Vitocal 333-G, NC including all components for natural cooling 

Vitocal 343-G, generally including the option to connect to a solar thermal system 

The Vitocal 343-G and Vitocal 333-G were 

developed as compact and highly efficient 

solutions for new build. In the course of 

this development, generously sized heat 

exchangers enabled a high COP 

(COP = coefficient of performance) of 4.7 to 

EN 14511 with brine 0 °C/water 35 °C to be 

achieved. 

In addition, the seasonal performance factor 

could also be maximised. It describes the ratio 

between the amount of heat (heating energy) 

transferred and input energy (drive energy) 

over the course of a full year. The innovative 

RCD system (Refrigerant Cycle Diagnostic) 

played a vital role in the improvement of the 

seasonal performance factor. This system 

enables a highly precise and rapid control 

of the refrigerant circuit via an electronic 

expansion valve. The RCD system ensures 

that the heat pump operates with optimum 

efficiency at every operating point. 

In addition, energy saving, high efficiency 

DC pumps compliant with Energy Label A 

for the brine and heating circuit, ensure very 

low consumption costs and therefore a high 

seasonal performance factor in all three 

compact appliances. 

With solar cylinders or natural cooling 

Vitocal 343-G is designed for the connection 

of a solar thermal system for DHW heating. 

A generously sized solar cylinder with a 220 l 

capacity and a solar control unit have been 

integrated into the appliance for this purpose. 

In the compact Vitocal 333-G, a DHW cylinder 

with a 170 l capacity ensures a convenient 

supply of DHW. To help cool you down on 

hot summer days, the Vitocal 333-G is also 

available in a version with an integral natural 

cooling function. 

Vitocal 343-G and 

Vitocal 333-G have 

been tested to the 

EHPA heat pump 

quality seal. 

14/15

Heat pumps 

Vitocal 333-G 

1 DHW cylinder, 

170 litre capacity 

2 Heat pump control unit 

Vitotronic 200 

3 Heat exchanger for 

cylinder heating 

4 Primary pump (high 

efficiency DC pump) 

5 Secondary pump (high 

efficiency DC pump) 

6 Hermetically sealed 

Compliant scroll 

compressor 

Vitocal 343-G 

Vitocal 333-G 

The compact heat pumps Vitocal 343-G and 

Vitocal 333-G are offered as three versions, 

i.e. with and without solar thermal connection 

and with integral natural cooling function. 

DHW cylinders with 170 litre capacity (solar 

version with 220 l) are integrated to safeguard 

high DHW convenience. At the core of the 

appliance is a newly developed high efficiency 

heat pump module. 

These compact appliances are highly efficient 

thanks to the new refrigerant circuit with 

electronic expansion valve (EEV) and the 

Viessmann-developed RCD (Refrigerant Cycle 

Diagnostic) systems plus the standard energysaving 

DC pumps. This is reflected day by day 

and year by year in high seasonal performance 

factors and low consumption costs. 

1 

3 

6 

2 

4 

5 

Small footprint 

With their space saving designs, the 

Vitocal 343-G and Vitocal 333-G are 

particularly suitable for anywhere where 

space is restricted. The brine and heating 

circuit pumps and the 3-way diverter valve are 

already integrated inside the compact casing 

that completely protects the cooling module/ 

hydraulic compartment from the outside 

environment and, in conjunction with the 

new three-dimensional anti-vibration mounts, 

minimises operating noise. These compact 

heat pumps are some of the quietest in their 

category, as they only generate 38 dB(A) at 

0/35 °C. 

For easier handling, the height of the unit was 

reduced and the body designed to split into 

sections. Variable connection accessories 

supplied ex works make heat pump 

installation easier. 

Extremely easy to operate 

Like all our compact appliances, the 

Vitocal 343-G and Vitocal 333-G, too, 

are equipped with the new, user-friendly 

Vitotronic control unit. If in doubt, help is 

available at the push of a button. The graphic 

interface will also display heating curves and 

solar yield. 

The programming unit of the Vitotronic control 

unit can be removed from the front of the 

appliance and be replaced with an external 

programming unit, available as an accessory, 

and a dummy cover. A five metre long power 

cable enables the external programming 

unit to be mounted almost anywhere in a 

convenient position on a wall mounting base. 

Always accessible 

Subject to demand, the new Vitotronic 

control unit can be fitted with convenient 

communication technology. From 

Vitocom 100 to Vitocom 300, versatile remote 

monitoring and remote control options are 

available wherever you are.

The compact heat pumps, Vitocal 343-G and Vitocal 333-G, 

contain everything you need for central heating and 

DHW heating. 

The new Vitotronic control units with large multi line 

plain text graphic display can also display the solar yield, 

for example. 

Take advantage of these benefits: 

n Compact ground source heat pumps with heating output from 5.9 to 10.3 kW 

n High performance factors: COP to EN 14511 up to 4.7 (brine 0 °C/water 35 °C) 

(COP = coefficient of performance) 

n High DHW convenience through integral DHW cylinder with a 220 litre capacity 

in the Vitocal 343-G (Vitocal 333-G with a 170 litre capacity) 

n Maximum flow temperature of up to 60 °C for high DHW convenience 

n Energy saving HE DC pump inside (Energy Label A) 

n Very quiet thanks to a new sound insulation concept resulting in a sound power 

level of 38 dB(A) at 0/35 °C 

n New Vitotronic control unit that is easy to operate, with plain text display 

n The programming unit that is part of the control unit can also be fitted on a wall 

mounting base 

n Ready to connect, ex works 

n Easy handling through reduced height and split casing 

n Convenient and compact through integral cooling function NC (natural cooling) 

for the Vitocal 333-G 

n Can be extended with convenient communication technology 

For specification, see page 56 

16/17

Heat pumps Vitocal 300-G

VITOCAL 300-G 

With the Vitocal 300-G, you can utilise sustainable heat stored underground or in ground 

water. This heat pump was designed for utmost compactness, so it takes up remarkably 

little space: Inside the casing of the BWC/WWC models, the circulation pumps for the 

brine circuit and the heating circuit, as well as the 3-way diverter valve, are already 

integrated. 

The Vitocal 300-G ground source heat pump 

is specifically designed for detached houses. 

It utilises heat that's right on your doorstep. 

What's more, you call the shots, selecting 

the output from 6.2 to 117.8 kW, making it 

both efficient and effective. So your central 

and DHW heating needs will be reliably and 

conveniently covered. 

Heat from the ground or groundwater 

You can choose how you get heat from the 

ground with the ground source version. This 

is done either via a geothermal probe or 

via a geothermal collector laid at a depth of 

approx. 1.5 m. In both cases, the heat pump 

covers the entire energy demand, even on 

colder days. Subject to the location of your 

house, it may also be possible to utilise the 

latent heat in groundwater. For this, the 

Vitocal 300-G is simply converted to operate 

as a water/water heat pump – and delivers the 

highest COP in this operating mode. 

Tightly packed performance 

The Vitocal 300-G (type BWC/WWC) proves 

its worth through its particularly compact 

design. It contains everything Circulation 

pumps for brine circuit and heating circuit 

including a safety assembly with safety valve, 

pressure gauge and air vent valve fitted as 

standard. This clever integration minimises 

the space required. An electric booster heater 

is available as an accessory. 

Greater heat demand? 

No problem for the Vitocal 300-G 

For buildings with a very high heat demand, 

the two-stage Vitocal 300-G based on the 

master/slave principle is the right choice. It 

achieves a heating output of 12.4 to 117.8 kW. 

Here, you also have the choice between the 

groundwater or the ground as the heat source. 

Vitocal 300-G are 

certified in accordance 

with the EHPA heat 

pump quality seal and 

NF-PAC. 

18/19

Heat pumps 

User-friendly interface: The digital 

WPR 300 control unit with user 

prompts displays an overview of 

the system configuration with 

temperature details. In addition, 

it enables remote monitoring and 

remote control with Vitocom 

and Vitodata. 

1 

4 

Vitocal 300-G 

Powerful, quiet and reliable 

The heart of the Vitocal 300-G is its powerful 

Compliant scroll compressor. It convinces 

through excellent reliability, safety and 

particularly quiet operation, thanks, in part, 

to the hermetic seal and dual anti-vibration 

mounts. At the same time, the Compliant 

scroll compressor ensures the highest 

performance factors and flow temperatures 

up to 65 °C. 

Support from the sun 

An advanced heating system should include 

innovative solar technology. For instance, 

using solar energy to back up your heat pump. 

For this, Viessmann offers you a system that 

is a perfect match for the Vitocal 300-G. 

Perfect for higher output levels too 

Even for greater heat demand, the 

Vitocal 300-G is the right choice, because 

you can link several separate heat pumps 

via the heating flow and return. This does 

not just deliver the higher heat output, but 

also increases the operational reliability of 

the entire system. The modular design with 

separate compressor circuits also provides a 

2 3 

5 

6 

particularly high efficiency in the partial 

load range, and simultaneously enables the 

operation of central heating and DHW heating. 

RCD system for an optimum heat pump 

operation 

RCD stands for Refrigerant Cycle Diagnostic 

system. It continually monitors the refrigerant 

circuit within the Vitocal 300-G and, in 

conjunction with the electronic expansion 

valve, ensuring the highest level of efficiency 

at any operating point. 

Modular solution for higher heat demand 

With six output sizes as a master or slave 

version, various combinations can be realised, 

precisely matched to the required heat 

demand. Because of this flexibility, systems 

can be configured so that runtimes match 

demand, thus saving you money. 

The master module regulates the slave 

module. By combining different output 

sizes, users have the option of matching the 

environmentally responsible heating system 

to their own heat demand – as, for example, 

in an apartment building – as efficiently as 

possible by utilising various modules. There is 

also the option to equip the entire system with 

high efficiency DC pumps (Energy Label A). 

Vitocal 300-G (type BWC/WWC) 

1 Safety equipment block with 

safety assembly 

2 Brine circuit pump 

3 Heat pump control unit, WPR 300, 

with user prompts 

4 Large area evaporator for an efficient 

heat transfer 

5 Hermetically sealed Compliant scroll 

compressor 

6 Electronic expansion valve

Optimised control characteristics and therefore reduced 

consumption costs – the Vitocal 300-G is equipped with an 

electronic expansion valve that ensures particularly high 

seasonal performance factors. 

Two-stage heat pump Vitocal 300-G (master/slave) – a 

pipework set with fittings and shut-off valves, is available for 

the hydraulic connection of the heat pump modules. Fully 

wired cables are used to connect the control unit. 



Heating output, single stage: 6.2 to 17.6 kW, two-stage: 12.4 to 35.2 kW 

Water/water heat pump 

Heating output, single stage: 8.0 to 21.6 kW, two-stage: 16.0 to 43.2 kW 

High coefficient of performance: COP value to EN 14511 up to 4.7 

(brine 0 °C/water 35 °C) (COP = coefficient of performance) 

Mono mode operation for DHW and central heating 

Quiet operation through hermetically sealed Compliant scroll compressor and 

sound insulation 

With a 65 °C flow temperature, suitable for radiator and underfloor heating 

Heat pump control unit with user prompts for weather-compensated heating 

operation and natural or active cooling 

Vitocal 300-G: brine pump, heating circuit pump and safety assembly are 

integrated (type BWC and WWC) 

Optional temporary installation of an electrical booster heater, for example, 

for screed drying 

With integral energy statement 


20/21

Heat pumps 

The Vitocal 300-G is 

tested in accordance 


pump quality seal. 

3 

5 

Vitocal 300-G 

The Vitocal 300-G is specifically designed for 

detached houses and apartment buildings. 

It utilises heat that's right on everyone's 

doorstep, either with a single stage brine/ 

water heat pump, from 21.2 to 42.8 kW, 

or with a water/water heat pump from 

28.1 to 58.9 kW – tailored to the specific 

heat demand. 

For apartment buildings or applications with 

a very high heat demand, the two-stage 

Vitocal 300-G, based on the master/slave 

principle, is the right choice. It can deliver a 

heating output from 42.4 to 85.6 kW (brine/ 

water) or from 56.2 to 117.8 kW (water/ 

water). You also have the choice between the 

groundwater or the ground as your preferred 

heat source. Where this output is still not 

enough, the cascade function integrated into 

the control unit enables output to be raised up 

to 471.2 kW (water/water). 

Powerful and reliable 

At the heart of the Vitocal 300-G lies its 

powerful Compliant scroll compressor. This 

convinces with a high degree of operational 

safety and reliability. The Vitocal 300-G, in 

conjunction with the large heat exchangers 

and the integral refrigerant manifold, achieves 

a high coefficient of performance and flow 

temperatures of up to 60 °C. 

2 

4 

1 

High output and quiet operation are not 

mutually exclusive 

The new Vitocal 300-G can prove that 

conclusively. The hermetically sealed casing 

and particularly clever design enable a 

reduction in noise emissions that far exceeds 

expectations in this output range. 


operation 


system. It provides a permanent monitoring of 

the refrigerant circuit within the Vitocal 300- 

G and, in conjunction with the electronic 

expansion valve, ensures the highest level of 

efficiency at any operating point. 

Perfect for higher output levels too 

Especially for a higher heat demand, the 

Vitocal 300-G is the first choice, because 

you can link several separate heat pumps 

via the heating flow and return. This does 

not just deliver the higher heat output, but 

it also increases the operational reliability of 

the entire system. The modular design, with 

separate compressor circuits, also ensures 

particularly high levels of efficiency in partial 

load operation, and enables the simultaneous 

operation of central and DHW heating. 

Vitocal 300-G 

1 Weather-compensated, digital heat pump 

control unit, Vitotronic 200, type WO1A 

2 Condenser 


heat transfer 


compressor 

5 Electronic expansion valve

Two-stage Vitocal 300-G (master/slave) as a 

brine/water or water/water heat pump 

Modular solution for higher heat demand 

With three output sizes, as master or slave 

version, various combinations can be realised, 

all precisely matched to the actual heat 

demand. These different versions, and sizing 

according to demand, enable systems to be 

configured so that runtimes are optimised, 

ensuring an economical operation. The master 

module regulates the slave module. By 

combining different output sizes, users have 

the option of matching the environmentally 

responsible heating system to their specific 

heat demand as efficiently as possible by 

utilising different modules. 



Heating output, single stage: 21.2 to 42.8 kW, two-stage: 42.4 to 85.6 kW, 

maximum 342.4 kW 

Water/water heat pump 

Heating output, single stage: 28.1 to 58.9 kW, two-stage: 56.2 to 117.8 kW, 

maximum 471.2 kW 

High coefficient of performance: COP value to EN 14511 up to 4.8 

(brine 0 °C/water 35 °C) (COP = coefficient of performance) 

Flow temperatures up to 60 °C 

Mono mode operation for DHW and central heating 

Low operating costs with the highest efficiency at any operating point through 

the innovative RCD system (Refrigerant Cycle Diagnostic System) with electronic 

expansion valve (EEV) 

Low noise and vibrations through 3-D sound concept, sound power ≤ 44 dB(A) 

With integral energy statement 

Heat pump control unit Vitotronic 200 (type WO1A) with user prompts for 

weather-compensated heating operation 

Easier handling through small and light modules 


22/23


Vitocal 222-G

VITOCAL 242-G 

VITOCAL 222-G 

Vitocal 242-G, the compact brine/water heat pump with the Vitocal 242-G DHW cylinder, 

with connection to a solar thermal system as an option. 

Complete and extremely compact – the 

compact Vitocal 242-G and Vitocal 222-G 

heat pumps are fully equipped with all 

components required for DHW and central 

heating. With heating outputs of between 

5.9 and 10.0 kW, they are designed for use in 

detached houses and flow temperatures of 

up to 60 °C mean they can also be used with 

conventional radiators. 

The Vitocal 242-G and Vitocal 222-G are 

attractively priced alternatives to the 

compact appliances of the 300 series. With 

the Compliant scroll compressor and a 

thermostatically controlled expansion valve, 

they achieve coefficients of performance 

of up to 4.3 (to EN 14511 with brine 0 °C/ 

water 35 °C). For the heating and brine circuit, 

three-stage adjustable circulation pumps are 

integrated into the appliances. 

Operating the appliances is extremely easy 

thanks to the new Vitotronic control unit. 

Vitocal 242-G is fully prepared for 

solar operation 

Vitocal 242-G is fully prepared for the 

connection of a solar thermal system for 

DHW heating. A 220 litre solar cylinder and a 

solar control unit enable high solar heat yields. 

Vitocal 222-G with a 170 litre DHW cylinder 

The Vitocal 222-G compact heat pump offers 

a high level of DHW convenience thanks to its 

170 litre DHW cylinder, which is heated via an 

internal heat exchanger. 

Solar collectors 

Vitocal 242-G 

Vitocal 242-G and 

Vitocal 222-G have 

been tested to the 

EHPA heat pump 

quality seal. 

24/25

Heat pumps 

Vitocal 242-G 

1 Heating lance 

2 Enamelled DHW cylinder 

3 Heat pump control unit 

Vitotronic 200 

4 Integral solar indirect coil 

5 PWM-controlled 

circulation pump for 

cylinder heating (pulse 

width modulation) 

6 Circulation pump, 

primary 

7 Circulation pump, 

secondary 

8 Diverter valve, 

heating/DHW 

9 Heat pump refrigerant 

circuit 

Vitocal 242-G 

Vitocal 222-G 

Natural heat for modern detached houses 

The Vitocal 242-G and Vitocal 222-G compact 

heat pumps are specifically designed for 

detached houses. With their extremely 

compact dimensions of hardly more than 

0.4 m2 they take up hardly any space. With 

integral DHW cylinder, brine and heating 

circuit pumps, plus a three-way diverter valve, 

these compact appliances are quick and easy 

to install. They are offered in two different 

versions – the Vitocal 242-G with solar 

function and a generously sized DHW cylinder 

with 220 litre capacity. The Vitocal 222-G has 

a 170 litre cylinder. Both heat pumps offer 

high DHW convenience. 

Extremely easy to operate 

Like all compact appliances, the Vitocal 222-G 

is equipped with the new extremely easy to 

operate Vitotronic control unit. 

9 

1 

2 

4 

6 

3 

8 

7 

5 

If in doubt, help is available at the push of a 

button. The graphic interface will also display 

heating curves and switching times. 

The programming unit of the Vitotronic control 

unit can be removed from the front of the 

appliance and be replaced with an external 

programming unit, available as an accessory, 

and a dummy cover. A five metre long power 

cable enables the external programming 

unit to be mounted almost anywhere in a 

convenient position on a wall mounting base. 

Particularly quiet operation 

The three-dimensional anti-vibration mounts 

make these compact heat pumps particularly 

quiet so that they can be installed close to the 

living space. 

Compact and ready to connect 

The casing may be split for easier handling. 

The heat pump is supplied ready to connect. 

Variable connection accessories ensure an 

easy installation on site. 

Heating naturally – naturally cooling 

as well 

With your compact heat pump, your low 

energy house will always feel comfortable, 

even in hot summers. The natural 

cooling function brings cool underground 

temperatures into your home. For this, 

you need the Viessmann NC-Box as an 

accessory, or alternatively, you can opt for the 

Vitocal 333-G with integral NC equipment. 

Vitocal 242-G including optional 

utilisation of a solar energy 

With the Vitocal 242-G, the connections for a 

solar thermal system are already in place, as 

hydraulic connections and a control unit are 

already integrated. The powerful collectors 

and matching system components from 

Viessmann back up the heat pump – meaning 

in an average year, you can save 50 to 

60 percent of energy conventionally spent on 

DHW heating.

The compact heat pumps fully live up to their reputation: low 

space requirement and no service clearances to the side, 

making them fit easily into even the tightest of recesses. 

Easy to operate Vitotronic control unit with simple navigation 

and clear menu tree. 


n Compact ground source heat pumps with heating output from 5.9 to 10.0 kW 

n High performance factors: COP to EN 14511 up to 4.3 (brine 0 °C/water 35 °C) 

(COP = coefficient of performance) 

n Maximum flow temperature: 60 °C 

n High DHW convenience through integral DHW cylinder with a 220 litre capacity 

in the Vitocal 242-G (Vitocal 222-G with a 170 litre capacity) 

n Very quiet thanks to new three-dimensional anti-vibration mounts with a sound 

power level of 43 dB(A) at 0/35 °C 

n New Vitotronic control unit that is easy to operate with plain text display 

n The programming unit that is part of the control unit can also be fitted on a wall 

mounting base 

n Ready to connect, ex works 

n Easy handling through small footprint, reduced height and split casing 

n Easy installation through flexible connection accessories 

n Can be extended with convenient communication technology 


26/27

Heat pumps Vitocal 200-G

VITOCAL 200-G 

With the Vitocal 200-G, heating with natural heat is not just a question of value for money. 

If you are building, or planning to build, a 

detached house, then Viessmann has the right 

heat pump solution that will win you over with 

its powerful output and surprise you with its 

affordability. The output of the Vitocal 200-G 

makes invest using renewables very attractive 

– particularly for detached houses. 

You won't need to worry about heating 

bills any more 

An investment in a Viessmann heat pump, 

such as the Vitocal 200-G, is always 

worthwhile because you won't have to pay for 

any more fuel from day one. From now on, 

the energy you use to generate heat comes 

free, from right outside your door. 

Furthermore, the power needed to exploit this 

free fuel is very efficiently used. From one 

kilowatt of power, a heat pump can generate 

between 3 and 4 kW of heat. 

A solid investment for the future 

Durability is a key feature of all Viessmann 

heat pumps. All materials used must comply 

with the most stringent demands; strict 

quality conditions are applied throughout the 

manufacturing process as well. This will pay 

off for you, for example, the refrigerant circuit 

is hermetically sealed and therefore requires 

no maintenance. 

The environment benefits 

It's good to know that heat pumps 

significantly reduce CO2 emissions every day 

whilst they provide DHW and central heating. 

After all, no fossil fuels are used here. This 

means you protect valuable natural resources, 

and by purchasing a Vitocal 200-G, you 

also make a personal contribution to active 

climate protection. 

Two heating circuits for individual 

heating convenience 

The convenient ground source heat pump 

offers all functions required for using a heat 

pump in a new detached home. The weathercompensated, 

digital heat pump control 

unit allows two separate heating circuits to 

be connected. 

High flow temperature 

Its innovative technology with efficient 

Compliant scroll compressor enables the 

Vitocal 200-G to achieve maximum flow 

temperatures of 60 °C. This frees you from 

restrictions to underfloor heating systems, 

permitting the heat to be discharged via 

radiators as well. High DHW convenience is 

also ensured. 

The Vitocal 200-G is 




NF-PAC. 

28/29


Top performance, even in winter 

With its output spectrum of 6.4 to 9.6 kW, 

the Vitocal 200-G in mono mode operation 

guarantees convenient heat supply all year 

round. This means you'll be as snug and warm 

inside as you want, even in the depths of 

winter – all without a booster heater. 

A heating system in summer? 

For cooling, naturally! 

On hot summer days you can make the room 

pleasantly cool with your Vitocal heat pump. 

Switch to natural cooling. By simply running 

the circulation pumps, the heat from inside 

your house is transferred to the ground. All 

you need to use the Vitocal's handy extra 

natural cooling function is an NC-Box. 

3 

1 

4 

5 

2 

Installation and assembly made easy 

The Vitocal 200-G is supplied with integral 

brine and heating circuit pumps, diverter 

valve and fitted safety assembly. Handling 

the Vitocal 200-G is no problem, since its 

casing and heat pump module are delivered 

separately. Installation on site is child's 

play, as all the connections are at the top. 

This also means the heat pump can be 

installed close to the wall without taking up 

an excessive amount of space. The optional 

temporary installation of an electrical booster 

heater, for example for screed drying, is an 

additional bonus. 

Vitocal 200-G 

1 Safety equipment block with 


2 Weather-compensated, 

digital heat pump control unit CD 70 

3 Brine circuit pump 


compressor 

5 Heat pump module, 

fully thermally insulated

Compact dimensions, powerful output. The Vitocal 200-G 

only takes up a little space, and its attractive design means 

that it looks good anywhere. 


n Attractively priced ground source heat pump, heating output: 6.4 to 9.6 kW 

n Provides all DHW and central heating in mono mode all year round 

n Extremely safe operation, reliable and quiet running through hermetically sealed 

Compliant scroll compressor with dual anti-vibration mounts 

n Weather-compensated, digital heat pump control unit with integral natural 

cooling function 

n Through the high flow temperatures of up to 60 °C, also suitable for operation 

with radiators 

n Easy handling through separate delivery of casing and heat pump module 

n With integral brine and heating circuit pumps, diverter valve and fitted 



30/31

Heat pumps 

Vitocal 350-A

VITOCAL 350-A 

Do you want to modernise your heating system with a heat pump, but are unable to 

make use of heat from the ground or groundwater? No problem with the Vitocal 350-A 

air source heat pump. 

The Vitocal 350-A air source heat pump 

with rated heating outputs 10.6 to 18.5 kW 

is particularly suitable for modernisation 

projects. Thanks to enhanced vapour injection 

in the compression process (EVI cycle), 

developed by Viessmann, flow temperatures 

of up to 65 °C can be achieved – even at 

winter outside temperatures. This air source 

heat pump can therefore also be used in older 

heating systems equipped with radiators. 

The Vitotronic 200 heat pump control unit 

of the Vitocal 350-A has an integral cascade 

function. This means that, in buildings with 

a high heat demand, up to four air source 

heat pumps can be operated in a cascade. 

Cumulative heating outputs of up to 74 kW 

are therefore possible. 

Air source heat pump with particularly 

high efficiency 

An electronic expansion valve and RCD 

system also ensure an extremely high level of 

efficiency for the Vitocal 350-A all year round. 

For air source heat pumps, the Vitocal 350-A 

offers a high coefficient of performance, 

i.e. 3.5 (in accordance with EN 14511 at 

air 2 °C/water 35 °C), resulting in high 

seasonal performance factors and very low 

running costs. 

Space saving thanks to outside 

installation 

The Vitocal 350-A can be installed either 

internally or externally. The three-stage radial 

fan in the heat pump, as well as the flowoptimised 

air routing and the sound insulated 

casing together make the Vitocal 350-A 

extremely quiet and during night operation 

the variable-stage fan control unit reduces 

the speeds and thus the noise emissions 

even further. 





NF-PAC. 

32/33

Heat pumps 

1 

2 

5 

6 

3 

Vitocal 350-A 

Ideal for modernisation 

The Vitocal 350-A air source heat pump 

makes modernising easy. The additional 

vapour injection in the compressor process 

(EVI cycle) enables flow temperatures of up 

to 65 °C. This therefore makes them an ideal 

choice for older heating systems equipped 

with radiators. The heat pump draws its 

energy from the ambient air so there is non of 

the inconvenience of drilling boreholes as for 

geothermal probes. 

High DHW convenience 

Subject to system version, a higher flow 

temperature enables a water temperature 

of up to 55 °C inside the DHW cylinder. 

This allows the Vitocal 350-A to deliver 

a particularly high DHW convenience. 

The Vitocal 350-A achieves its high flow 

temperature of 65°C even at outside 

temperatures as low as –10 °C. 

4 

7 

2 

RCD guarantees efficient operation 


system. In the Vitocal 350-A, it is responsible 

for permanently monitoring the refrigerant 

circuit. This, in conjunction with the electronic 

expansion valve (EEV) ensures the highest 

efficiency at every operating point. Alongside 

this, important operating parameters are 

saved and called up, when required, for 

diagnosis, optimisation, energy statements 

and to calculate the seasonal efficiency (SPF). 

Just perfect 

If the heat pump is installed outside, the heat 

needs to be "transported" to the interior of the 

house. For this, you can rely on the heating 

competence of Viessmann. For routing 

underground, you can rely on Viessmann's 

specially matched, thermally insulated 

pipe systems, as well as a complete range 

of accessories. 

Vitocal 350-A 

1 Intake side 

2 Discharge side 

3 Evaporator 

4 Radial fan 

5 Electronic expansion valve 

6 Evaporator for intermediate injection 

7 Hermetically sealed scroll compressor 

with vapour injection (EVI)

The Compliant scroll compressor will win you over with its 

inner values of reliability, safety and quiet running 

Vitocal 350-A for internal installation 


n Air source heat pump, mono mode with a heating output of 10.6 to 18.5 kW for 

DHW and central heating 

n Particularly suitable for modernisation (even for existing radiator systems) due to 

65 °C flow temperature, even at low outside temperatures 

n DHW temperature subject to system version up to 55 °C 

n Low running costs thanks to a high COP (COP = coefficient of performance) of 

up to 3.6 to EN 14511 (air 2 °C/water 35 °C) 

n High efficiency all the year round at any operating point and therefore low 

running costs through the innovative RCD (Refrigerant Cycle Diagnostic) system 

with an electronic bi-flow expansion valve (EEV) 

n Low operating noise through radial fan, sound-optimised design and night 

operation with reduced fan speed 

n Easy to operate heat pump control unit, Vitotronic 200, with telecontrol and 

remote monitoring for connection to Vitocom 100/300, plus cascade function for 

up to four heat pumps 

n Internal or external installation with matching accessories 

n As an option with HE heating circuit pump for the Vitocal 350-A 

(internal installation) 

n Efficient defrosting through circuit reversal 

n With integral energy statement 


34/35

Heat pumps 

Vitocal 300-A

VITOCAL 300-A 

The Vitocal 300-A opens a new chapter for modulating air source heat pumps 

guaranteeing the highest level of efficiency at every stage with its advanced 

heat pump technology. 

Simply taking energy out of the air and 

using it for central and DHW heating sounds 

rather tempting. However, especially in 

winter, i.e. precisely when the demand for 

heating energy is high, the outdoor air does 

not contain much energy for a heat pump 

to extract. However, this is no problem for 

the Vitocal 300-A air/water heat pump. It 

is particularly efficient and can, even at an 

outside temperature of 6 °C, still deliver a 

flow temperature of 60 °C. 

Heating efficiently with air 

The Vitocal 300-A air/water heat pump 

is extremely efficient and achieves high 

seasonal performance factors. It can take over 

both central and DHW heating. So you can 

eliminate the cost of fossil fuels from your 

household expenditure right from the start. 

You only have to meet the cost of electricity 

to run the heat pump system. 

Higher convenience, lower investment 

No additional investment is required to install 

a Vitocal 300-A air source heat pump. There 

is no geothermal collector to be installed 

or drilling work to be carried out, as is the 

case with geothermal probes. Depending 

on which version you choose, you may not 

need a costly buffer cylinder or primary store 

system either, because output is matched to 

your needs in an optimum operation. Another 

benefit lies in the fact that the Vitocal 300-A 

can be installed outside or inside, subject to 

the prevailing building conditions. 





NF-PAC. 

36/37

Heat pumps 

3 

4 

1 

Vitocal 300-A 

Top technology for top performance 

The Vitocal 300-A is the first air source heat 

pump with digital scroll technology and an 

electronic bi-flow expansion valve. This 

means it achieves an extremely high COP 

value (coefficient of performance): 3.9 (at 

air 2 °C/water 35 °C), enabling exemplary 

high and seasonal performance factors, too. 

What's more, this makes the Vitocal 300- 

A particularly reliable where heat supply is 

concerned and very frugal when it comes to 



operation 


system. It provides constant monitoring of 

the refrigerant circuit within the Vitocal 300- 

A and, in conjunction with the electronic 

expansion valve, ensures the highest level of 

efficiency at any operating point. 

5 

2 

6 

Not only quiet at night 

Particularly quiet operation is ensured by a 

radial fan with variable speed control and a 

reduced fan speed for night operation. 

Everything you need 

Every household has a different heat demand 

and circumstances concerning the installation 

of a heat pump are different from site to site. 

The range of accessories for the Vitocal 300- 

A is both flexible and comprehensive 

enough to meet these challenges. Subject 

to requirement, the heat pump can be 

supplied fully equipped. This means the HE 

DC pump (Energy Label A), 3-way diverter 

valve and safety equipment have already 

been fully fitted. Even the modular electric 

instantaneous heating water heater can be 

easily integrated. Finally, Viessmann also 

offers the complete product range to meet 

the demands of any installation you require – 

inside or out. 

Monitor and control from wherever 

you are 

With the new control unit of the 

Vitocal 300-A, you can simply connect your 

heat pump to the Vitocom 100/300. This 

gives you the option of conveniently operating 

your heating system via your mobile phone if 

you wish. 

Cooling – no problem 

Thanks to its reversible operation, the 

Vitocal 300-A can also be used for cooling. 

Convectors or surface cooling systems with 

a cooling capacity of up to 9.4 kW give you 

the flexibility to make your living area even 

more pleasant. 

Vitocal 300-A 

1 Evaporator 

2 Radial fan 

3 Electronic expansion valve 

4 Condenser 

5 HE DC pump (Energy Label A) 

6 Digital scroll compressor

Technology that interacts perfectly – the RCD system, the 

digital scroll technology and the electronic bi-flow expansion 

valve guarantee the highest level of efficiency at every 

operating point. 

Vitocal 300-A for external installation 


n Reversible air source heat pump for heating and cooling for internal or 

external installation 

n Variable output control from 3.0 to 9.0 kW 

n Low running costs thanks to a high COP to EN 14511 3.9 

(with air 2 °C/water 35 °C) 4.4 (with air 7 °C/water 35 °C) 

n Maximum flow temperature up to 60 °C at 6 °C outside temperature 

n High efficiency all the year round at any operating point and therefore low 

running costs through the innovative RCD (Refrigerant Cycle Diagnostic) 

system with an electronic bi-flow expansion valve (EEV) 

n Low operating noise through radial fan, sound-optimised design and night 

operation with reduced fan speed 

n Easy to operate heat pump control unit Vitotronic 200 with telecontrol and 

remote monitoring for connection to Vitocom 100/300 plus cascade function for 

up to four heat pumps 

n Integral HE heating circuit pump for the Vitocal 300-A (internal installation) 

n Efficient defrosting through circuit reversal 

n With integral energy statement 

n Particularly quiet as silent version 

n Active cooling mode possible through reversible refrigerant circuit 


38/39

Heat pumps 

Vitocal 200-S

VITOCAL 200-S 

The Vitocal 200-S utilises affordable energy from the ambient air. 

It is suitable for new build and existing buildings. Combination with existing heat sources 

is also easily possible. 

Heating and cooling system with internal 

and external unit 

As an alternative the Vitocal 200-S heat pump 

is also available as a heating system only 

or as a system for heating and cooling. The 

Vitocal 200-S utilises the latent heat in the 

outdoor air. The weather-resistant external 

unit can be sited where required and is easy 

to install, even on external walls, thanks 

to its compact dimensions. A freestanding 

installation next to the building or on a flat roof 

is also possible. 

Vitocal 200-S 

External and internal unit 

As with other heating systems, the internal 

unit is sited in a cellar or utility room inside 

the building. It is comprised of the hydraulics, 

the heat exchanger, a heating circuit pump 

and a 3-way diverter valve for a convenient 

supply of heating water and DHW. As an 

option, a three-stage instantaneous heating 

water heater can also be integrated (for type 

AWS AC already integrated as standard). 

In summer, the Vitocal 200-S, type AWS AC, 

can also be used to cool the rooms in the 

building. For this, fan convectors or an 

underfloor heating system can be used. 

Schematic diagram of a heating system including 

Vitocal 200-S in a new building (-left) and for modernisation 

Vitocal 200-S as heating system in a new building Vitocal 200-S and oil/gas boiler for 

dual mode operation in modernisation projects 

(system example: AWS 104/107) 

DHW cylinder Vitocal 200-S DHW Boiler Heating water 

External and 

internal unit 

cylinder 

buffer cylinder 

M 

M 

40/41

Heat pumps Vitocal 200-S 

3.0 to 10.6 kW 

4 

1 

2 

Vitocal 200-S 

internal unit 

3 

1 Expansion vessel 

2 3-way diverter valve 

3 Heating circuit pump 

4 Heat exchanger 

5 Vitotronic 200 

5 

1 

Efficient and economical 

The Vitocal 200-S operates with astonishing 

efficiency, particularly in partial load mode. To 

this end, the appliance makes full use of the 

benefits offered by a DC inverter. Through 

modulation it matches the compressor output 

precisely to the prevailing demand and 

thereby maintains the required temperature. 

When it comes to modernisation, the split 

heat pump is ideally suited for efficient dual 

mode operation. Under these circumstances, 

the existing system remains in operation to 

cover peak loads. 

Quiet operation through variable 

speed control 

The modulating operation of the Vitocal 200-S 

reduces the frequency of system starting and 

stopping. In addition, the variable speed fans 

and compressor are significantly less noisy 

than those that run at constant operation at 

top speed. 

Convenient Vitotronic control unit 

Contractor and system users benefit equally 

from the easy to operate Vitotronic 200 

control unit: The control unit, with users 

prompts, is structured logically and is easy 

to follow. The large backlit display offers 

good contrast, making it easy to read. A help 

function informs users of the next steps 

to perform. The graphic interface will also 

display heating and cooling curves. Additional 

components from the comprehensive range 

2 

3 

can be easily switched. If required, the 

programming unit can be installed hard wired 

on a wall mounting base up to five metres 

away from the Vitocal 200-S. 

Extensive service from Viessmann 

The refrigerant lines are connected to form a 

circuit on site. Consequently, the legislature 

specifies that the installation is carried 

out by qualified personnel only. Heating 

contractors can acquire the relevant expertise 

in accordance with the Chemical Safety 

Ordinance as part of a one week course at 

Viessmann. Systems can be commissioned by 

Viessmann's Technical Service department. 

With design software developed by 

Viessmann in accordance with VDI 4650, 

heating contractors can calculate whether 

public subsidies are available for the relevant 

system wherever required. 

Viessmann expands its comprehensive 

product range 

The Vitocal 200-S is a valuable extension 

of the comprehensive product range from 

Viessmann. This offers individual solutions 

with efficient systems for any application 

and every type of fuel. As opposed to niche 

suppliers, Viessmann supplies all components 

and systems from a single source to the 

specialist trade. 

Vitocal 200-S 

External unit 

1 Evaporator 

2 Fan 

3 Compressor

Vitocal 200-S Split air source heat pump 


n Attractively priced air source heat pump with heating output between 3.0 and 

10.6 kW (with air 2 °C/water 35 °C at the nominal operating point) 

n Output control and DC inverter for high efficiency in partial load operation 

n Low running costs thanks to a high COP to EN 14511 up to 4.6 

(air 7 °C/water 35 °C) and 3.5 (air 2 °C/water 35 °C) 

n Maximum flow temperature up to 55 °C at –15 °C outside temperature 

n Weather-resistant external unit with evaporator, compressor, expansion valve 

and fan 

n Internal unit with heating circuit pump, heat exchanger, 3-way diverter valve, 

safety assembly and control unit; for heating/cooling version with instantaneous 

heating water heater 

n Easy to operate Vitotronic 200 control unit with plain text and graphic display 

n Controllable through reversible version that enables heating and cooling 

n Optional commissioning by Viessmann's Technical Service department 


42/43

Dual mode systems 

Dual mode heating systems: saving twice is better still 

Oil and gas prices continue to rise. So what should you do if you have purchased an 

advanced oil or gas boiler in the past few years? Simple – save a great deal with a dual 

mode heating system, and at the same time reduce emissions. 

A heat pump is the ideal way to extend the 

heat supply of an existing oil or gas heating 

system. Consumption costs are lowered 

through the use of free energy from the 

environment, causing a simultaneously 

reduction in dependence on fossil fuel. 

However, a dual mode heating system has 

even more benefits: 

n Oil storage space and amount of oil to be 

stored can be reduced 

n The operating times of the existing system 

are reduced so the service life is extended 

n Power for heat pumps can be obtained at 

special tariffs 

n The existing DHW heating system can 

continue to be used 

Little effort, great effect 

You only need: 

n Three-phase power supply with 400 V 

n Installation area for heat pump and heating 

water buffer cylinder, approx. 4 m2 n Radiator heating system < 65 °C 

n Boiler thermostat setting max. 65 °C 

n Options for drawing in outside and 

exhaust air when installed inside 

n Space to install the special heat pump 

meter 

n Power supply to the heat pump meter 

Vitocal 300-A utilises the outdoor air heated by the sun – and 

on cold days, a second heat source can be switched on 

automatically by the heat pump control unit.

Two thirds less fuel oil 

*Average value for 2009 

Initial state Dual mode system 

Oil boiler Oil boiler & Heat pump 

Output 18 kW 18 kW 9 kW 

SPF 100% 30% 70% 

Annual heat demand 32,400 kWh 9720 kWh 22,680 kWh 

Heating efficiency 90% 90% 330% 

Energy demand 36,000 kWh 10,800 kWh 6872 kWh 

Proportion of DHW 3000 kWh 3000 kWh – 

Energy consumption 3900 litre fuel oil 1380 litre fuel oil 6872 kWh electricity 

Energy price* €0.76 /l €0.76 /l €0.14/kWh (WP) 

Consumption costs* €2965 €1050 €960 

Total* €2965 €2010 

Savings (€) – approx. €950 

Example: Heating system with max. 55 °C flow temperature, 1800 full utilisation hours, 18 kW heat load of the building. 

DHW heating by the boiler. House with 150 m² and an annual heating energy consumption of approx. 39,000 kWh incl. DHW heating (3000 kWh). 

Benefits of dual mode systems: 

n Utilisation of the strengths of different heat sources 

n Reduction in consumption and running costs 

n Utilisation of free natural energy to a large extent 

n Reduction in environmentally damaging CO 2 emissions 

n High security of supply 

n Greater independence from fossil fuels 

n Reduction in hours run by existing systems 

44/45

Heat pumps Vitocal 160-A 

VITOCAL 160-A 

DHW heating with central heating. 

Vitocal 160-A: heat pump for DHW heating 

The Vitocal 160-A heats DHW whilst saving 

energy and costs. As its heat source, it 

uses the warm air inside the building that is 

always around and is therefore ideally suited 

for use anywhere where heat is available 

in abundance, e.g. in bakeries. It can be 

operated completely independently of other 

heat sources. 

Compact DHW station utilises 

ambient heat 

The compact Vitocal 160-A DHW heat 

pump is equipped with all the components 

necessary for efficient and space-saving 

DHW heating. Together with the heat pump 

module (output 1.52 kW, COP = 3.54 at 15 °C 

air temperature and 45 °C water temperature), 

a 285 litre cylinder, a booster heater and 

the control unit are all integrated inside a 

single casing. 

1 2 3 

4 

6 

5 

7 7 

Various programs can be conveniently 

selected using the easy-to-use control unit 

with its large display. Whether for DHW 

heating, constant operation or standby mode 

– the various functions can be selected at a 

few keystrokes. 

Additional benefits of room cooling or 

controlled domestic ventilation 

The recirculation air heat pump, Vitocal 160-A, 

uses air straight from the room in which it 

is installed. As an extract air heat pump, it 

draws in warm extract air via ducts from other 

rooms, e.g. the bathroom, WC and kitchen. 

Part of the latent heat in this air is extracted, 

raised to a useful temperature level with the 

heat pump, and used to heat the DHW. 

The recirculating air heat pump then returns 

the cooled and dehumidified air to the 

installation room. That room can then be used 

as a cool larder for groceries. 

In case of an extract air heat pump, the cooled 

air is routed to the outside via an exhaust 

air duct. In conjunction with ventilation air 

apertures that ensure the supply of fresh 

outdoor air to the living space, the Vitocal 160- 

A becomes the central component of a 

controlled domestic ventilation system. 

This makes the Vitocal 160-A suitable for 

modernisation too. 

Vitocal 160-A 

1 High efficiency rotating piston compressor 


heat transfer 

3 Programmed control unit subject to 

appliance type, with solar function 

4 Magnesium anode 

5 Integral booster heater with 1.5 kW output 

6 Integral enamelled 285 l DHW cylinder 

7 Condenser

The compact DHW heat pump, Vitocal 160-A, can operate 

independently, separate from other heat sources. 

Lower costs through solar energy 

Both versions are available with an integral 

indirect solar coil and solar control unit. 

Through the connection of up to six square 

metres of flat-plate collectors or up to three 

square metres of vacuum tube collectors, 

the free energy of the sun can also be 

used to heat DHW and further reduce the 


230 V socket is sufficient 

The Vitocal 160-A is supplied pre-assembled. 

Simply install, connect the water pipes and 

condensate drain, and plug into a 230 V power 

socket – and the recirculating air heat pump is 

ready for operation. 


Attractively priced DHW heat pump for recirculating or extracting air mode with 

option of internal indirect solar coil and solar control unit for connecting flat-plate 

and tube collectors 

Air flow rate up to 250 m 3 /h 

Cylinder capacity 285 litres, cylinder with special enamel coating 

Easy commissioning through ready to plug in wiring and programmed control unit 

DHW heat pump for sole heating of the required DHW in heat pump operation 

up to 55 °C 

Suitable as an extract air version with vents suitable for regulated ventilation of 

up to 200 m2 living space 

Integral booster heater (1.5 kW) for DHW temperatures up to 65 °C 


46/47

Heat pumps 

Cooling with heat pumps 

The primary function of a heat pump is to provide pleasant and convenient heat, and 

reliable DHW heating. However, they can also be used to cool a building. 

Imagine a hot summer's day. Would you 

switch your heating on? Probably not, unless 

you have a Viessmann heat pump. After all, 

heating systems don't generally have much to 

do in summer – apart from heating DHW. It is 

different for heat pumps, as some Viessmann 

heat pumps also offer a cooling function as an 

additional benefit. 

Active or passive cooling 

When cooling with a heat pump, you can 

choose between two different methods: 

Passive cooling: 

This is where the brine medium or the 

groundwater absorbs the energy from the 

heating circuit via a heat exchanger and 

transfers it outside. This function is also 

called natural cooling, as it uses the natural 

ambient temperature. Apart from the 

control unit and circulation pump, the heat 

pump remains switched off. 

Active cooling: 

For this, the function of the heat pump is 

simply reversed. This method of cooling 

can be described as "reverse operation". 

This means that the refrigerant circuit is 

reversed internally or reversal is achieved 

by an external changeover of the primary 

and secondary circuits. As with a fridge, 

cooling is then actively generated by the 

heat pump. 

Cooling naturally: Natural cooling 

While the ground or groundwater is used 

in winter to provide energy for heating, in 

summer it can be used for natural cooling. 

With the natural cooling function, the control 

unit only starts the primary pump and heating 

circuit pump. This means the relatively hot 

water from the underfloor heating system can 

transfer its heat in the heat exchanger to the 

brine in the primary circuit. This extracts heat 

from all rooms that are connected. This makes 

natural cooling a particularly energy-efficient 

and affordable way to cool buildings. 

NC-Box 

Optional equipment for 

Viessmann heat pumps to 

provide passive cooling 

Page 50 

AC-Box 

Optional equipment for 

Viessmann heat pumps to 

provide active cooling 

Page 51 

48/49

Natural cooling 

NC-Box 

NC-Box – energy-efficient and 

affordable cooling 

The Viessmann NC-Box helps heat pumps to 

provide cooling in a completely natural way. In 

fact, it's really quite simple. On hot summer 

days, the temperatures inside your house are 

higher than in the ground or groundwater. 

The heat pump control unit then switches 

to natural cooling, and uses the ground or 

groundwater to dissipate the heat from your 

living space. 

Saving while cooling 

The natural cooling function does not use all 

the technology of the heat pump. This means 

that, apart from the control unit and circulation 

pumps, all other functions remain off. Only 

a very small amount of power is therefore 

consumed for operation. This makes natural 

cooling a particularly energy-efficient and 

affordable method for cooling buildings. 

The effective thermal insulation of the NC-Box 

prevents the formation of condensate. 

Everything you need to keep cool 

In the Viessmann "Natural Cooling Box", all 

components are prefitted. This makes the 

thermally insulated box not only compact, but 

also particularly simple and quick to install. 

With or without mixer 

Depending on the sort of cooling needed, the 

natural cooling box comes in two different 

versions, either with or without mixer. The 

integral mixer enables continuous operation 

without falling below the dew point.

Active cooling 

AC-Box – efficient heating or cooling 

The Viessmann AC-Box combines active 

cooling and natural cooling in your heat pump 

systems, thus making it even more versatile 

and convenient. Depending on how cool 

you would like your home to be, the system 

switches over automatically. If only a low 

cooling capacity is required, then natural 

cooling is adequate, but if that is no longer 

sufficient, active cooling is added. 

Cooling using tiny amounts of energy 

With natural cooling, the compressor circuit 

is not needed. Only the brine and heating 

circuit pumps are operational and utilise the 

temperature differential between the rooms 

and the ground or groundwater. This means 

they cool your home in a particularly costeffective 

way. 

AC-Box 

Keep cool when it gets really hot outside 

With active cooling, the compressor 

circuit starts to work. However, it does not 

provide heating – the internal control unit, in 

conjunction with the AC-Box, reverses the 

output and input functions and now actively 

transfers heat out of the building to the 

geothermal probe. Cold water now flows 

through the heating circuit itself – cooled 

down to 7 °C if required. 

Utilising extracted energy 

Incidentally, you can also make direct use 

of the heat transferred out of the rooms in 

this way, for example for DHW heating or to 

heat a swimming pool. This means you can 

combine the cooling and heating functions 

extremely effectively. 

Well developed technology: The 

AC-Box simply starts the heat pump 

function – depending on the 

required cooling capacity – either 

the active or the natural 

cooling function. 

50/51

Domestic ventilation 

system 

Vitovent 300

VITOVENT 300 

Air quality makes a real difference to the quality of life inside our homes. For this however, 

an adequate air change rate is essential. However, modern construction practices do not 

make this easy, as buildings are designed to be as airtight as possible, to prevent heat 

loss. This is where the Vitovent 300 ventilation system comes in, creating a pleasant, 

healthy atmosphere in your room, without wasting energy. 

Air is considered to be fresh when its CO2 concentration falls below 0.1 percent by 

volume and it is free from odours. Opening 

the window to achieve this initially seems 

to be the best idea. However, window 

ventilation is a bit hit and miss. Either we 

ventilate too much and waste heating energy, 

or we ventilate too little and then feel tired 

and listless. In contrast, the Vitovent 300 

domestic ventilation system continuously 

replaces the air and removes odours and 

noxious substances. The result is a pleasant, 

healthy climate. 

Prevent mould, protect the building fabric 

One of the main causes of mould growth 

is humid indoor air. Caution: Not only does 

mould look unsightly, it is also unhealthy, both 

for yourself and for the fabric of your building. 

However, investing in a domestic ventilation 

system is cheaper than remedying building 

damage caused by fungal growth and mould. 

Allergy sufferers can breathe a sigh 

of relief 

A filtration system, employing an effective 

pollen filter (cat. F6), cleans the supply air 

of harmful substances. This allows allergy 

sufferers to enjoy fresh air too and reducing 

the growth of mites and mould fungus is 

beneficial for everyone. 

Enjoy security and quietness 

Vitovent 300 ensures a continuous air change 

– so windows can stay closed all year round. 

That doesn't just offer improved safety 

against burglary, but also keeps out any noise 

there may be outside. 

52/53

Domestic ventilation 

system 

1 

1 

Vitovent 300 

Ventilating virtually without energy loss 

Energy saving is Vitovent 300's trump card. 

The powerful heat exchanger recovers more 

than 90 percent of the latent heat contained in 

the stale air and uses it to heat the incoming 

air. Thanks to the very efficient DC motors, for 

each 1 kWh of electrical energy expenditure, 

15 times more heating energy is recovered. 

This means that in a living area of 150 m2 for example, you save around 300 l fuel oil 

each year. 

Cooling with night air 

In winter, the majority of the heat contained 

in the extract air is recovered through the 

heat exchange function. In summer, the heat 

exchanger is completely bypassed via the 

integral bypass damper. The temperature 

controlled bypass circuit allows cool outdoor 

air to enter the rooms at night, thereby 

ensuring a pleasant room climate. 

3 

2 

4 

The Fastflex flat duct system: 

space-efficient and easy to install 

The Fastflex system for air distribution is 

precisely matched to the Vitovent 300. For 

one thing, it makes it easier to install and 

set up the domestic ventilation system, 

and for another, it also saves space. Two 

floors can be supplied simultaneously via a 

single installation level. The flat ducts are 

so versatile that they can adapt to suit any 

structural characteristics and they are also 

particularly stable and can be routed below 

the screed in the floor insulation. 

Vitovent 300 domestic ventilation system 

with energy recovery 

1 DC fans 

2 Bypass damper 

3 Heat exchanger 

4 Air filter

The Vitovent 300 provides a comfortable ambient climate all year round, 

reduces the ventilation heat demand and lowers the heating costs. 

Exhaust air 

Outdoor air 

Exhaust air 

Ventilation air 

Ventilation air 

Boiler 

DHW cylinder 

Solar collector 


Domestic ventilation system up to 180, 300 or 400 m3 /h 

Ensures a comfortable and healthy ambient climate 

Saves on heating costs 

Heat recovery level in excess of 90% reduces the ventilation 

heat loss to a minimum and lowers the heating costs 

Integral, temperature controlled bypass (300 and 400 m3 /h) 

circumvents heat recovery in summer (100%) and enables 

ventilation with cool night air 

Economical DC motors with a constant flow rate and 

balance control keep the air flow constant, independent of 

the static pressure 

Outdoor air filtered with a fine filter – important for allergy 

sufferers 

Reduces unpleasant odours 

Balanced humidity management prevents building damage 

Closed windows – improved security against burglary and 

noise protection 

Convenient control via three freely mountable remote 

control units 


54/55

Specification 

Vitocal 343-G brine/water heat pump 

Vitocal 343-G Type BWT 106 BWT 108 BWT 110 

Output data (to EN 14511, B0/W35 °C, 5 K spread) 

Rated heating output 

Cooling capacity 

Power consumption 

Performance factor ε (COP) in heating mode 

Overall dimensions 

Length x Width x Height mm 680 x 600 x 2075 

Cylinder capacity litres 220 220 220 

Total weight kg 260 260 266 

Vitocal 300-G single stage brine/water heat pump 

Vitocal 300-G 

Output data 

(to EN 14511, B0/W35 °C, 5 K spread) 





Type BW/BWC 

106 BW/BWC 

108 BW/BWC 

110 BW/BWC 

112 BW/BWC 

114 BW/BWC 

117 

kW 

kW 

kW 

6.2 

4.9 

1.38 

4.5 



Total weight kg 138 143 152 158 165 168 

Vitocal 300-G 

Output data 

(to EN 14511, W10/W35 °C, 5 K spread) 





8.4 

6.6 

1.82 

4.6 

Vitocal 300-G single stage water/water heat pump 

10.2 

8.1 

2.22 

4.6 

12.1 

9.6 

2.57 

4.7 

15.1 

11.9 

3.35 

4.5 

17.6 

13.8 

4.09 

4.3 

Type WW/WWC 

106 WW/WWC 

108 WW/WWC 

110 WW/WWC 

112 WW/WWC 

114 WW/WWC 

117 

kW 

kW 

kW 




8.0 

6.7 

1.4 

5.5 

kW 

kW 

kW 

Vitocal 333-G/Vitocal 333-G NC brine/water heat pump 

Vitocal 333-G/Vitocal 333-G NC Type BWT 106 BWT 108 BWT 110 

Output data (to EN 14511, B0/W35 °C, 5 K spread) 








Total weight Vitocal 333-G 

Vitocal 333-G NC 

kW 

kW 

kW 

kg 

kg 

11.0 

9.2 

2.0 

5.5 

13.6 

11.6 

2.3 

5.7 

5.9 

4.7 

1.25 

4.7 

5.9 

4.7 

1.25 

4.7 

249 

254 

15.8 

13.3 

2.8 

5.5 

7.9 

6.3 

1.66 

4.7 

7.9 

6.3 

1.66 

4.7 

249 

254 

19.8 

16.6 

3.3 

5.7 

10.3 

8.3 

2.19 

4.7 

10.3 

8.3 

2.19 

4.7 

256 

261 

21.6 

17.9 

4.3 

5.1

Vitocal 300-G heat pump as stage 2 (slave) 

Vitocal 300-G Type BWS 106 BWS 108 BWS 110 BWS 112 BWS 114 BWS 117 

Output data 

(to EN 14511, B0/W35 °C, 5 K spread) 





kW 

kW 

kW 

6.2 

4.9 

1.38 

4.5 




Vitocal 300-G single stage heat pump 

Vitocal 300-G Type BW 121 BW 129 BW 145 WW 121 WW 129 WW 145 

Performance data to EN 14511, 

brine/water heat pump: B0/W35 °C, 5 K 

spread or 

Water/water heat pump: 

W10/W35 °C, 5 K spread) 





kW 

kW 

kW 

21.2 

17.0 

4.5 

4.7 


Length x Width x Height (incl. control unit) mm 1085 x 780 x 1267 


Vitocal 300-G two-stage heat pump 

Vitocal 300-G Type BW 121 

+ 

BWS 121 

Performance data to EN 14511, 

brine/water heat pump: B0/W35 °C, 5 K 

spread or 

Water/water heat pump: 

W10/W35 °C, 5 K spread) 

Rated heating output (master/slave) 


kW 

kW 

42.4 

34.0 

8.4 

6.6 

1.82 

4.6 

28.8 

23.3 

6.0 

4.8 

BW 129 

+ 

BWS 129 

57.6 

46.6 

10.2 

8.1 

2.22 

4.6 

42.8 

34.2 

9.3 

4.6 

BW 145 

+ 

BWS 145 

85.6 

68.4 

12.1 

9.6 

2.57 

4.7 

28.1 

23.7 

4.7 

5.9 

WW 121 

+ 

WWS 121 


Length x Width x Height (incl. control unit) mm 1085 x 780 x 1267 

Total weight 

Types BW / WW 

Type BWS 

kg 

kg 

282 

277 

305 

300 

345 

340 

56.2 

47.4 

282 

277 

15.1 

11.9 

3.35 

4.5 

37.1 

31.4 

6.2 

6.0 

WW 129 

+ 

WWS 129 

74.2 

62.8 

305 

300 

17.6 

13.8 

4.09 

4.3 

58.9 

48.9 

10.7 

5.5 

BW 145 

+ 

WWS 145 

117.8 

97.8 

345 

340 

56/57

Specification 



Output data (to EN 14511, B0/W35 °C) 





















Vitocal 200-G Type BWP 106 BWP 108 BWP 110 









kW 

kW 

kW 

kW 

kW 

kW 

kW 

kW 

kW 

5.9 

4.6 

1.40 

4.2 

5.9 

4.6 

1.40 

4.2 

6.4 

4.9 

1.5 

4.2 

7.7 

6.0 

1.84 

4.2 

7.7 

6.0 

1.84 

4.2 

7.8 

5.9 

1.9 

4.1 

10.0 

7.8 

2.32 

4.3 

10.0 

7.8 

2.32 

4.3 

9.6 

7.3 

2.4 

4.0

For external installation 

For internal installation 

Vitocal 350-A air/water heat pump 

Vitocal 350-A Type AWHI 351.A10 AWHI 351.A14 AWHI 351.A20AWHO 351.A10 AWHO 351.A14 AWHO 351.A20 

Output data 

(to EN 14511, A2/W35 °C) 





Length 

Width 

Height 

Vitocal 300-A Type AWCI_AC 301.A AWO-AC 301.A 

Output data 

(to EN 14511, A2/W35 °C) 



Coefficient of performance ε in heating mode 

Coefficient of performance ε A7/W35 °C 

Cooling capacity A27/W7 °C 

Vitocal 200-S Type AWS 104 

AWS AC 104 

Heating output data 

at 100% to EN 14511 (A2/W35 °C, 

spread 5 K) 


Coefficient of performance ε in heating mode 

Output control 

Cooling capacity data 

at 100% to EN 14511 (A35/W7 °C, 

spread 5 K) 

Rated cooling capacity 

Energy efficiency ratio ε (EER) in cooling mode 

Output control 

Dimensions, external unit: 

Total length (depth) 

Total width 

Total height 

Dimensions, internal unit 

Total length (depth) 

Total width 

Total height 

Total weight 

External unit 

Internal unit 

kW 

kW 

mm 

mm 

mm 

Vitocal 300-A air/water heat pump 

kW 

kW 

kW 

Vitocal 200-S air/water heat pump 

kW 

kW 

kW 

kW 

mm 

mm 

mm 

mm 

mm 

mm 

kg 

kg 

10.6 

3.0 

3.6 

946 

880 

1870 

3.0 

3.30 

1.1 – 3.8 

3.2 

2.96 

1.2 – 3.8 

3 – 9 

2.3 

3.9 

4.4 

8.6 

290 

869 

610 

360 

450 

850 

43 

35 

AWS 107 

AWS AC 107 

5.6 

3.24 

1.3 – 7.7 

6.2 

2.6 

1.6 – 8.0 

340 

1040 

865 

360 

450 

850 

66 

35 

3 – 9 

2.3 

3.9 

4.4 

8.6 

AWS 110 

AWS AC 110 

7.7 

3.50 

4.4 – 9.9 

7.4 

2.75 

2.4 – 8.5 

340 

900 

1255 

360 

450 

850 

110 

40 

AWO-AC 301.A 

(silent version) 


Length x Width x Height mm 946 x 880 x 1870 946 x 880 x 1885 1265 x 1380 x 1885 


14.5 

4.2 

3.5 

946 

1030 

1870 

18.5 

5.8 

3.2 

946 

1200 

1870 

10.6 

3.0 

3.6 

1265 

1380 

1885 

14.5 

4.2 

3.5 

1265 

1530 

1885 


18.5 

5.8 

3.2 

1265 

1700 

1885 

3 – 9 

2.3 

3.9 

4.4 

8.6 

AWS 113 

AWS AC 113 

10.6 

3.26 

5.0 – 11.9 

9.1 

2.50 

2.4 – 10.0 

340 

900 

1255 

360 

450 

850 

110 

40 

58/59

Vitocal 160-A DHW heat pump 

Output during DHW heating from 15 to 45 °C and 15 °C air temperature kW 1.52 

Power consumption kW 0.43 

Coefficient of performance ε (COP) 3.54 

Air flow rate m 3 /h 250 

Power consumption of immersion heater kW 1.50 

Cylinder capacity litres 285 

Weight 

Type WWK/type WWKS kg 105/110 

Dimensions 

Length ø 

Width 

Height (recirculating mode) 

Height (extract air mode) 

Natural cooling NC-Box 

Performance data 

Cooling capacity subject to the heat pump output 

for Vitocal 343-G/333-G/300-G/242-G/222-G/200-G 


Length 

Width 

Height 

kW approx. 

1.25 to 5.0 

Total weight excl. mixer kg 25 

Total weight incl. mixer kg 28 

Active cooling AC-Box 

The maximum cooling capacity is limited by the integral heat pump 

(for Vitocal 300-G) 


Length 

Width 

Height 

Total weight kg 80 

mm 

mm 

mm 

mm 

mm 

mm 

mm 

mm 

mm 

mm 

660 

700 

1847 

1838 

520 

580 

420 

720 

350 

970

Vitovent 300 domestic ventilation system 

Vitovent 300 m 3 /h 180 300 400 

Air flow rate 

Max. air flow rate under pressure 

Dimensions excluding connectors 

Length (depth) 

Width 

Height 

m 3 /h 

m 3 /h/Pa 

mm 

mm 

mm 

50 to 180 

180/150 

50 to 300 

300/100 

50 to 400 

400/100 

Weight kg 25 31 32 

Filter DIN EN 779 

Outdoor air 

Extract air 

Filter class 

Filter class 

Countercurrent heat exchanger 

Heat recovery level up to % 92 91 91 

Automatic bypass no yes yes 

Summer cassette yes no no 

Digital remote control 

with 7-day program yes yes yes 

310 

560 

600 

F6 

G4 

436 

675 

747 

F6 

G4 

436 

675 

747 

F6 

G4 

60/61

System technology 

A perfect match: System technology 

The convenient controls and perfectly matching Viessmann system technology 

offer you maximum reliability, flexibility and efficiency. 

Viessmann does not simply supply individual 

heating equipment components that 

correspond to its high standards of quality and 

reliability. The same high standards also apply 

to Viessmann system technology, where all 

components fit together perfectly. 

Part of the Viessmann system technology is 

the knowledge of what makes a reliable and 

economical heating system, namely the heat 

pump control unit with integral heat meter as 

the highly capable Vitocell DHW cylinders for 

optimum DHW convenience. 

DHW 

DHW convenience for 

every demand: 

With the Vitocell range of 

cylinders from Viessmann, 

you have an enormous 

choice and maximum 

scope when designing 

your heating system 

Page 64 

Data communication 

Do you know about 

Vitocom? 

It's the ideal solution 

for monitoring a 

heating system, and 

exchanging data easily 

and conveniently from a 

different location 

Page 66 

62/63

System technology DHW 

The Vitocell range from 

Viessmann offers the right 

DHW cylinder for every 

aspiration. 

DHW convenience for every demand 

With the Vitocell DHW cylinders, Viessmann offers you the convenient solution to 

supplying your household with hot water – the perfect extension to your new heat pump. 

The demand for hot water is completely 

different in every household. One factor is 

the number of residents and another is their 

bathing and showering habits. For example, 

several people in one household frequently 

go to work and school at the same time, so 

lots of hot water needs to be continuously 

available for the shower in a short space of 

time. Those who prefer a bath will also want 

to have enough hot water to fill the tub. 

Finally, the DHW cylinder should be able to 

deliver sufficient water, if in an apartment 

block, hot water is being drawn from more 

than one outlet at the same time. The Vitocell 

DHW cylinders fulfil these requirements in 

every respect and are also robust enough to 

cope with constant demand.

Optimally matched for use with 

heat pumps 

Viessmann system solutions from a single 

source make it easy for you to utilise the 

energy from your heat pump to optimum 

effect, for example with a suitable DHW 

cylinder especially for heat pumps that are 

specifically designed for the requirements of 

detached and two-family homes when using a 

Vitocal 200, 300 or 350. 

DHW convenience that's as individual 

as you are 

The DHW cylinder is prepared for the 

connection of a solar thermal system or the 

installation of one or two additional electric 

booster heaters with up to 6 kW output for 

boosting the DHW temperature. 

Strong inner values 

Viessmann's product range includes the 

Vitocell 300 and Vitocell 100 product groups. 

All Vitocell 300 cylinders are made of 

stainless steel and meet the most stringent 

hygiene requirements. It is no coincidence 

that stainless steel is also used for its antibacterial 

properties in the processing industry, 

in kitchens and in hospitals. 

Alternatively, the inner surfaces of the 

Vitocell 100 are lastingly protected against 

corrosion with the proven Ceraprotect enamel 

coating. All DHW cylinders are fully equipped 

with high-grade insulation against heat loss. 

Internal indirect coils, drawn low down to 

the cylinder floor, enable quick and energyefficient 

heating of the entire cylinder content. 

Viessmann DHW cylinder Vitocell 100-V: 

perfectly designed for use with heat pumps 

Squeaky clean: The Vitocell 300 

DHW cylinders are made of 

stainless steel – a material 

that meets the highest 

hygiene standards. 

64/65

System technology Data communication

Everything under control – from wherever you are 

Take advantage of the particularly convenient wireless digital TeleControl program from 

Viessmann to regulate your heating system. Naturally wireless and digital. 

Vitocom and Vitohome are our most 

convenient remote control products for 

your heating system. You communicate 

directly with the digital heat pump control 

unit, which can be matched to your 

individual requirements. 

Vitocom 100 

Vitocom 100 is the easy way to remotely 

monitor and control your heat pump via your 

mobile phone. This remote control is ideal 

for detached and two-family houses. It's also 

suitable for holiday and weekend homes that 

are not occupied all the time. On your way 

there, start up the heating system via your 

mobile and set the required temperature. 

It could hardly be any simpler or more 

economical. 

Vitohome 300 

Vitohome 300 is the ideal solution for 

centralised domestic automation. Set the 

precise temperature for every room and heat 

only where necessary and required. 

Vitohome 300 is easy right from the start. 

Components communicate by wireless 

signals, making it ideal for retrofitting, as no 

wiring is required. The heating system does 

not require any expensive conversions either. 

The system is based on the European KNX 

communication standard. This enables 

additional functions to be added with 

ease – even at a later stage. Your electrical 

wholesaler will offer you matching devices, 

such as window contacts, smoke detectors 

and controls for lighting and blinds. They 

offer optional simulation of a presence, 

and panic circuits. The result is not just 

improved convenience, but also a higher 

level of security. 

Vitohome 300 – the simple and convenient centralised 

domestic automation system controls the temperature curve 

in every room subject to demand, thus saving considerably 

on heating costs. 

66/67

Accessories 

System accessories from Viessmann – complete 

heating systems from a single source 

The Vitoset range offers you products from a single source to operate your heating 

system in complete safety. 

Every Vitoset product meets the high quality 

demands you have come to expect from 

Viessmann. So don't settle for anything less. 

The range of accessories works perfectly with 

all other Viessmann heating systems. Here is 

an overview: 

Universal radiators 

You can recognise the quality of these 

radiators by their high-grade, long lasting paint 

finish. Thanks to their neutral finish in white 

RAL 9016, Viessmann universal radiators 

will blend easily into any room. On request, 

all universal radiators can also be supplied in 

special colours. 

Panel radiators 

Their brilliant, smooth design makes these 

flat panel radiators an exceptionally aesthetic 

design feature, which is subtle yet effective. 

The technical concept behind them is 

optimised for the demands of energyefficient 

heating. The resistant, plasticcoated 

surface is easy to clean and gleams in 

white RAL 9016. 

Beautifully finished and pleasing to the eye: Bathroom 

radiators come in many different sizes and colours. They 

also make a stylish design feature. 

Bathroom radiators 

These innovative Vitoset bathroom radiators 

with their slender pipe elements look elegant 

and light. They will help you to make your 

bathroom stylish, and will keep your towels 

nice and warm. 

Alongside their connection to the heating 

system, the bathroom radiators can also be 

operated electrically. It's even possible to 

combine both techniques, i.e. the central 

heating connection for the heating season, 

and the heater rod, for cooler summer days. 

Underfloor heating systems 

Energy-efficient, safe, convenient Vitoset 

underfloor heating systems from Viessmann 

let you enjoy an extremely pleasant ambience 

due to the even transfer of heat throughout 

your room. Furthermore, Viessmann has 

designed the control technology especially 

for heat pumps, regulating both heating and 

cooling operation in summer. 

68/69

Service for every 

aspect of heating 

Viessmann trade partners

With our trade partners, you're in good hands 

At Viessmann, proximity to trade partners is the basis of the company's success. 

You, too, can benefit from their expertise if you choose a new Viessmann heat pump. 

You can receive advice, sales, installation and 

customer service exclusively via Viessmann 

trade partners, who are trained regularly 

by the company, and have an in-depth 

knowledge of its products. 

Take advantage of the comprehensive 

service you can expect from your installation 

heating contractor. 

Some service examples: 

n Free, no-obligation and individual advice, 

even on site 

n Clear calculation of savings in heating costs 

through the installation of a heat pump, 

also when combined with solar collectors 

n Calculation of the payback period, after 

which the new heat pump will have paid 

for itself through energy savings 

n Calculation of the actual heating and DHW 

demand for your household or property 

n Comprehensive solution with everything 

from a single source – including geothermal 

probe drilling 

n Support when applying for subsidies 

Affordable finance, economical heating 

Here are some financial terms and conditions 

to shout about: Viessmann and CreditPlus 

bank have some winning financial deals to 

support you if you are updating an existing 

system. You can finance your new heat pump 

with only 3.99 percent APR. This means 

you generally save much more on heating 

costs than you spend on finance. Detailed 

information can be obtained from your local 


www.viessmann.de/foerdermittel 

The government is rewarding environmentally 

responsible heating. Current information can 

be found on the internet at 

www.viessmann.de/foerdermittel. There, 

you'll always find the most up-to-date 

information, and can gain an initial overview 

before your first discussion with your heating 

contractor. 

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Service for every 

aspect of heating 

Geothermal project management

Geothermal systems with assured quality 

If you want to become independent of fossil fuels, and at the same time consider 

environmentally responsible heat generation, your first choice should be a ground source 

heat pump. If you select this option, you can utilise the unlimited heating energy from the 

ground, free of charge. The important thing is to have a reliable partner for geothermal 

probe drilling – Viessmann geothermal project management. 

Bank on specialist knowledge and 

practical experience 

Installing a geothermal probe requires a great 

deal of specialist knowledge and practical 

experience. Therefore, ask a competent 

partner to support you: The Viessmann 

geothermal project management team will 

undertake the entire process for you. 

Geothermal probes of proven quality 

from Viessmann Geothermal 

Your benefits at a glance: 

n Expert advice on heat source development 

n Staged pricing depending on postal code 

and output 

n Drilling permits obtained 

n Individual engineering for system larger 

than 30 kW 

n Test drilling 

n Thermal response test (checking the 

thermal conductivity of the ground) 

n Drilling and geothermal probe(s) for 

Vitocal ground source heat pumps, 

incl. Viessmann environmental damage 

insurance (cover: €5 million), environmental 

liability and operating liability insurance 

(cover €10 million) 

n Primary connections, incl. all groundwork 

Viessmann makes drilling for 

geothermal probes easy: 

Viessmann drilling offer 

Placing an order 

Processing 

Permit procedures 

Local meeting to 

prepare for drilling 

Drilling and primary connection 

Viessmann invoice 

72/73

Contacts and further 

information 

Always there for you 

It's easy to discover more online: Viessmann online offers 

detailed information about products, subsidy opportunities 

and services. 

Viessmann is a family business, operating globally. In constant contact with associates, 

the company develops innovative solutions – always with your wishes and requirements 

in mind. 

Viessmann contacts are your competent 

and enthusiastic local points of reference; 

they will be happy to support you with any 

questions you may have about heating 

and modernisation. You are best advised 

to arrange a personal consultation. Your 

Viessmann heating contractor will be happy 

to help! 

Viessmann online 

Further information regarding Viessmann 

products and their capacities, see 

www.viessmann.de. 

There you can obtain information on all 

Viessmann products.

www.viessmann.de 

Quick help via the internet 

Do you have questions about Viessmann 

products or on the subject of heating? 

At www.viessmann.de, you can find 

comprehensive information round the clock 

on all Viessmann heating systems and 

their output levels, a technical lexicon and 

much more. 

Subsidy programmes 

For current information on subsidies available 

when you choose an environmentally 

responsible heating system from Viessmann, 

see www.viessmann.de. 

Furthermore, you can obtain individual 

competent advice from all Viessmann 

sales offices or directly from your 


Your local contact 

Are you still trying to find Viessmann contacts 

in your area? Use the quick search function at 

www.viessmann.de. 

Simply click on "Partner vor Ort" and in a few 

steps you will find your contact. 

74/75

The comprehensive range of products and services 

from Viessmann 

Detached houses 

Apartment buildings 

Commerce / Industry 

Local heating 

networks 

Oil low temperature and 

condensing technology 

13 – 20,000 kW 

Gas low temperature and 


4 – 20,000 kW 

Individual solutions with efficient systems 

The comprehensive range of products and 

services from Viessmann 

The comprehensive range of products and 

services from Viessmann offers individual 

solutions with efficient systems for all 

applications and all energy sources. As 

environmental pioneers, the company has, 

for decades, been supplying particularly 

efficient and clean heating systems for oil 

and gas, as well as solar thermal systems 

along with heat generators for sustainable 

fuels and heat pumps. 

The comprehensive range of products 

and services from Viessmann offers top 

technology and sets new benchmarks. 

With its high energy efficiency, this range 

helps to save heating costs and is always the 

right choice where ecology is concerned. 

Solar thermal and 

photovoltaics 

Individual and efficient 

Viessmann offers the right heating system for 

any demand – wall mounted or floorstanding, 

in individual combinations – all are futureproof 

and economical. And whether for detached 

houses or two-family homes, large residential 

buildings, commercial/industrial use or for 

local heating networks; for modernising 

existing properties or new build – they are 

always the right choice.

Wood combustion technology, 

CHP and biogas production 

4 – 13,000 kW 

Key performers 

The Viessmann Group sets the technological 

pace for the heating industry. This is what the 

Viessmann name represents, and also what 

the names of the subsidiaries in the Group 

represent, as they are founded on the same 

pioneering spirit and power of innovation. 

The company offers the following: 

n Condensing technology for oil and gas 

n Solar thermal systems 

n Heat pumps 

n Wood combustion systems 

n CHP modules 

n Biogas plants 

n Services 

Heat pumps for 

brine, water and air 

1.5 – 2000 kW 

Viessmann is extremely highly specialised in 

all these market segments, yet at the same 

time the company has a crucial advantage over 

specialist suppliers: Viessmann understands 

heating technology as a systematic whole and 

offers unbiased advice on technology and fuel 

type. This guarantees the best solution for 

every application. 

Air conditioning technology System components 

The comprehensive range of products and services from 

Viessmann: Individual solutions with efficient systems for all 

energy sources and applications 

76/77

The comprehensive range of products and services 

from Viessmann 

Oil low temperature and 


13 – 20,000 kW 

Gas low temperature and 


4 – 20,000 kW 

Solar thermal and 

photovoltaics 

Wood combustion 

technology, 

CHP and biogas 

production 

4 – 13,000 kW 

Heat pumps for 

brine, water and air 

1.5 – 2,000 kW 

Detached houses Apartment buildings Commerce / Industry Local heating networks 

Architect‘s own home, Bad Füssing, 

Germany 

Detached house, Kevelaer, 

Germany 

Heliotrop Freiburg, 

Germany 

Detached house, Wiesloch, 

Germany 

Loftcube Regional Garden Show, 

Neu-Ulm, Germany 

Residential development Zi Wei 

Garden Xi‘an, China 

„Wohnoase“ residential park in 

Regensburg, Germany 

HafenCity Hamburg, 

Germany 

Hotel Lagorai Cavalese, 

Italy 

Studio flats, Brandenburg, 

Germany 

The comprehensive range of products and services from Viessmann: 

Individual solutions with efficient systems for all energy sources and applications 

Ameco A380 Hangar Beijing, 

China 

Porsche Leipzig, 

Germany 

City of Tomorrow, Malmö, 

Sweden 

Congressional Centre, Brunstad, 

Norway 

University library, Bamberg, 

Germany 

European Parliament, Strasbourg, 

France 

European Parliament, Brussels, 

Belgium 

The Palm Jumeirah, 

Dubai 

Monastery St. Ottilien, 

Germany 

Residential estate, Pfäffikon, 

Switzerland

Futureproof heating technology for 

all requirements 

Energy consumption worldwide has doubled 

since 1970 and will triple by 2030. The 

result: The fossil fuels, oil and gas, are 

dwindling, energy prices are on the rise and 

excessive CO emissions continue to affect 

2 

our environment. Energy efficiency is a must if 

we want our future to be secure. 

In almost every industrial nation, supplying 

heat to residential and commercial buildings 

accounts for the largest share of energy 

consumption – consequently it also offers the 

greatest savings potential. Advanced efficient 

heating systems from Viessmann are in use 

around the world, not only in many private 

households, but also in numerous major 

international projects, where they make a 

sizeable contribution to the efficient use of 

energy resources. 

In these projects, Viessmann again and 

again faces up to the most varied challenges 

to supply efficient heating technology by 

offering innovative solutions – in historical 

listed buildings as well as in modern industrial 

complexes or in the large-scale residential and 

industrial arena. 

City of Tomorrow, Malmö, Sweden 

78/79

The company

Viessmann – climate of innovation 

The Viessmann brand promise concisely 

expresses all that we hope to achieve. It is 

our key brand message and, together with 

our brand label, is an identifying feature 

throughout the world. “Climate of innovation“ 

is a promise on three levels: It is a commitment 

to a culture of innovation. It is a promise of 

high product utilisation and, at the same time, 

an obligation to protect the environment. 

Comprehensive range of products and 

services for all fuel types 

Viessmann is one of the leading international 

manufacturers of heating systems and, with 

its comprehensive range of products and 

services, offers individual solutions in the 

shape of efficient systems for all applications 

and types of fuel. As an environmental 

pioneer, the company has been supplying 

particularly efficient and clean heating 

systems. 

Viessmann Werke GmbH & Co. KG 

Company details 

n Established in: 1917 

n Employees: 9000 

n Group turnover: €1.7 billion 

n Export share: 50 percent 

n 16 factories in Germany, France, Canada, 

Poland, Hungary, Austria, Switzerland 

and China 

n Sales organisation in 37 countries 

n 120 sales offices worldwide 

n 3 service providers 

Acting in a sustainable manner 

For Viessmann, to take responsibility, means 

a commitment to act in a sustainable way. 

This means bringing ecology, economy and 

social responsibility into harmony with each 

other, ensuring that current needs are 

satisfied without limiting the basis for life 

for the generations to come. 

Efficiency Plus 

With the sustainability project “Efficiency 

Plus“ Viessmann shows at its Allendorf site, 

that the political goals set for 2020 with 

regard to climate and energy can already be 

achieved today with commercially available 

technology. 

This project demonstrates: 

n Environmental protection 

n Efficiency with resources 

n Securing manufacturing sites for the future 

As a result, fossil fuels have been cut by 

40 percent and CO emissions reduced by 

2 

a third. 

Performance spectrum 

n Condensing technology for oil and gas 

n Solar thermal systems 

n Heat pumps 

n Wood combustion systems 

n CHP modules 

n Biogas plants 

n Services 

Viessmann won the German 

Sustainability Award 2009 for its 

commitment to climate protection 

and efficient use of resources. 

For the particularly efficient 

utilisation of energy through the 

innovative heat recovery centre 

at the company‘s main site in 

Allendorf/Eder, Viessmann was 

rewarded with the Energy Efficiency 

Award 2010. 

80/81

9449 593 - 3 GB 02/2011 

Copyright Viessmann. 

Duplication and alternative use only with prior written consent. 

Subject to technical modifications. 

Your heating contractor: 

The Viessmann Group 

D-35107 Allendorf (Eder) 

Telephone +49 6452 70-0 

Fax +49 6452 70-2780 

www.viessmann.com

Heizen mit Naturwaerme 02-2011_GB.indd - Viessmann

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