Viessmann Vitodens 100-W User manual

Vitodens 100-W
Gas fired condensing Combination and
System boiler, type WB1C, with modulating
MatriX cylinder burner and Inox-Radial
heat exchanger for open flue and balanced
flue operation.
Rated output range: 7.4 to 35 kW
10 Year Warranty
on all stainless steel heat exchangers for
gas condensing boilers up to 105 kW

Contents
Viessmann profile from page 2
Product features from page 6
Control technology from page 10
Ease of installation from page 11
Technical specification from page 14
Viessmann Headquarters, Allendorf (Eder), Germany

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Introduction
Established in 1917, Viessmann draws on more than 90 years of experience in the
development and manufacture of heating systems and due to its high commitment to
quality, it is Europe's single largest brand in heating technology. Viessmann is a third
generation family business and as such is able to hold true to its principles of innovation,
efficiency and sustainability; this is a significant reason behind Viessmann's
continuing success.
Viessmann's domestic product range has been built around a long established reputation for
high quality commercial heating systems. Viessmann has utilised its extensive knowledge
and expertise to develop domestic heating products that define the quality benchmark
for other brands. Viessmann manufactures all of its own products and controls to ensure
that the drive for quality remains throughout the entire range and that there are additional
benefits from combining its heating technologies. Viessmann produces and sells products in
the following sectors: high efficiency boilers, both domestic and commercial; solar thermal
flat plate and tube collectors and PV panels; air source and ground source heat pumps;
biomass boilers; and CHP units for commercial and domestic use, using a number of fuels
including biogas.
However the principles of innovation, efficiency and sustainability don't only apply to
products, but extend to all areas of the business. Viessmann's head office and production
facility in Allendorf, Germany, was restructured from 2007 to 2009 at a cost of 220 million
Euros and energy use was aligned with European climate change goals, of a 20% reduction
in energy usage and CO2 emissions and a transfer of 20% of energy production into
renewables, by 2020. In 2009, under the umbrella of the 'Efficiency Plus' project, Viessmann
achieved its goal of saving 40% of oil, gas and electricity through the use of renewable
energy while at the same time reducing CO2emissions by a third. Almost all measures to
improve efficiency and renewable substitution were achieved with commercially available
products made by members of the Viessmann Group; whether these were Solar panels,
CHP units, Oil, Gas or Biomass boilers.
For this project, Viessmann received the German Sustainability Award 2009 in the category
“Most Sustainable Production” as well as the German Energy Agency’s Efficiency Award
in 2010. In addition, Viessmann was honoured with the 2011 German Sustainability Award
in the category “Most Sustainable Brand”. These awards recognised the company's
achievement of combining economic success with social responsibility and environmental
conservation. Hence Viessmann products contribute to reducing the carbon footprint of UK
homes even before they are installed.
Leading heating technology from Europe's largest brand -
manufactured in Germany's most sustainable factory
Viessmann
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A crucial element of the EC Directive
regarding "integrated pollution prevention and
control" (IPPC Directive) of 30th October 1996
is the stipulation to apply the "best available
technology" (BAT) in all new systems, and
since 2007, also in all existing systems.
Viessmann feels a traditional obligation to
the basic requirement of using the best
technology available while aiming to protect
the environment to the best of its ability.
As the generation of heating energy
accounts for 40 percent of all European
energy consumption, the best technology
available for this has a significant influence on
resources and environmental protection.
The following examples reflect this:
Condensing technology offers the
greatest energy utilisation
Condensing technology for oil and gas
currently offers the highest energy utilisation
with seasonal efficiencies (to DIN) of up to
98 percent. Compared to other technologies
for generating heat, this substantially reduces
the consumption of fossil fuels. In this
process, additional heat is obtained from the
flue gas through condensation. This makes
particularly high demands of the heating
surface material and design. All Viessmann
condensing boilers for gas or oil are therefore
equipped with stainless steel heating
surfaces/heat exchangers.
Fossil oil and gas may only be available for a
limited time now, but Viessmann condensing
technology is futureproof, because bio-oil and
biogas from sustainable materials can
gradually replace crude oil and natural gas.
Today, all Viessmann condensing boilers are
already prepared for admixtures of bio-oil
and biogas.
Weather Compensation – Great for gas bills
With the increasing cost of fuel, boiler
efficiency is becoming more and more
important. The only way to improve the
efficiency of a good quality condensing boiler
is to add weather compensation controls.
The Vitodens 100-W range are designed to
work with optional weather compensation
controls, to achieve additional fuel savings
of up to 12% – meaning huge savings every
year, for a small initial outlay (System models
must be installed as a 4-pipe system).
The controls work by monitoring the outside
air temperature and adjusting the heating
water from the boiler to suit. Lower flow and
return temperatures mean that the boiler can
condense more. This proactive mechanism
means that the boiler burns as much fuel as it
needs – but no more – to achieve the desired
room temperature.
People inside the building will experience a
constant temperature and won’t even notice
that the temperature outside has changed –
but they will notice a significant reduction of
their gas bills!
Good news for architects and specifiers –
the weather compensation feature adds 3%
to the boiler’s SEDBUK efficiency when using
SAP (Standard Assessmant Procedure).
To understand more about the benefits of
weather compensation and how it works,
download our Weather Compensation
brochure from www.viessmann.co.uk
The MatriX cylinder burner and
MatriX burner (bottom) ensure
maximum energy efficiency and
extremely clean combustion.
Viessmann heating equipment: Committed to the environment
Condensing technology offers the greatest potential for conserving fossil fuels in the heating sector.

Vitodens 100-W
Efficient, durable,
affordable and quiet

400
700
400
350
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VITODENS 100-W
Looking for a modern gas fired condensing
boiler with a particularly favourable price -
without sacrificing quality?
With the Vitodens 100-W, we have the
solution. With a range of models and
outputs to suit every application.
Vitodens 100-W product info at a glance
Vitodens 100-W System boiler:
19, 26, 30 and 35 kW
Standard efficiency:
97% (Hs) / 108% (Hi)*
Vitodens 100-W Combination boiler:
26, 30 and 35 kW
Standard efficiency:
97% (Hs) / 108% (Hi)*
Reliable and durable -
Made in Germany
As a major manufacturer, with many years
of experience in the manufacture of wall
mounted boilers we know what matters.
Even when attractively priced, our standards
of product quality and performance are
consistently implemented. Therefore
Viessmann wall hung boilers are not only
renowned for innovative technology and
services, but particularly for reliability
and longevity.
Warranties
n 5 year comprehensive parts and labour
warranty on the boiler
n 10 year warranty on the unique Viessmann
Inox-Radial heat exchanger
One of the smallest and quietest
gas fired wall hung boilers in this
product group
The compact dimensions and
minimal operating noise mean it can be
easily integrated into the smallest of homes.
1) 35 kW output
Long service life through
stainless steel MatriX mesh
The MatriX cylinder burner developed
and produced by Viessmann ensures high
efficiency because of its stainless steel
MatriX mesh.
High DHW convenience
The electronic temperature regulator
ensures a constant supply of DHW.
Service and maintenance
The AquaBloc combines all hydraulic
components into one compact unit, to make
all serviceable parts easily accessible from the
front of the boiler, cutting down on servicing
time and cost.
* (Hs) = gross calorific value
(Hi) = net calorific value
High DHW convenience
*** star
Water flow ∆T = 35 K
10.6 litres / minute (26 kW)
12.3 litres / minute (30 kW)
14.3 litres / minute (35 kW)
10 Year Warranty
on all stainless steel heat exchangers for
gas condensing boilers up to 105 kW
Noise level
< 40 db(A) 1)

Vitodens 100-W Product features -
The Inox-Radial heat exchanger
and how it works
The heat exchanger design
Stainless steel is, without doubt, the best material
for primary heat exchangers in condensing
boilers. One of the unique design features of all
Vitodens boilers is the Inox-Radial heat exchanger
made from high grade stainless steel. Designed
for long-term reliability, high performance and
self cleaning. We are so confident in our heat
exchanger that we guarantee it for 10 years
against corrosion.
Innovative technology and high
quality materials
Stainless steel is used in many demanding
applications including medical technology and
aerospace. When stainless steel is combined
with innovative design there are significant
benefits in durability and reliability.
100% corrosive resistant - one of the many
advantages of stainless steel
Stainless steel is ideally suited to condensing
boilers. It is temperature stable and resistant to
condensate, making it very corrosion resistant
and extremely durable.
Excellent self-cleaning depends on a
smooth surface
The smooth surface of stainless steel is perfect
for condensing boilers. Viessmann builds on this
advantage by designing heating surfaces which
enhance the self-cleaning effect. This means
the condensate drains off more quickly. Dirt
and residues of combustion cannot take hold,
resulting in considerable savings in maintenance,
the certainty of long term high efficiency,
reliability and increased product life.
Maximum energy from minimum space
Small in size, big on performance. Efficient
transfer of the heat from the heating gas to
the water depends on the heating gas being in
extremely close contact with the heating surface.
Viessmann has developed special technologies
for this very purpose, such as the Inox-Radial
heating surface used in wall-mounted boilers.
The Inox-Radial heat exchanger is the result
of intensive development
Heat transfer in the Inox-Radial heat exchanger
takes place across a laminar split flow. Instead of
a round section stainless steel pipe, Viessmann
has developed a rectangular stainless steel
spiral wound heat exchanger. A slot of 0.8mm
is maintained across the total length and this
produces a laminar flow without a boundary layer
- and excellent heat transfer.
In 1995 Viessmann developed
the Inox-Radial stainless
steel heat exchanger. At the
heart of all Vitodens wall-
mounted condensing boilers
is a corrosion-resistant,
high-alloy stainless steel
Inox-Radial heat exchanger. A
key component to outstanding
efficiency, this high
performance heat exchanger
also delivers proven reliability
and a long service life.
Inox-Radial heat exchanger
The heat exchanger in operation
Flue gas
900°C Flue gas exit
MatriX gas
burner
Condensate
Hot water return
40°C
Hot water flow
Inox-Radial heat
exchanger
The Inox-Radial heat exchanger is manufactured in Allendorf, Germany

8/9
Product features -
The MatriX cylinder burner
The MatriX burner is a milestone
The MatriX cylinder burner, in combination
with the Inox- Radial heat exchanger, ensures
high-energy efficiency and long-term heating
convenience. Plus, with low emission
combustion, the MatriX cylinder burner is also
environmentally-friendly.
Modulating MatriX pre-mix burner
Developed by Viessmann, with thousands
of tiny flames instead of one large flame, the
MatriX cylinder burner distributes heat cleanly
and efficiently and the stainless steel MatriX
mesh ensures long term reliability.
The extremely low NOx and CO emissions
meet or exceed all international clean air
regulations and guidelines. With a modulation
range of 1:4 the heat demand is optimised and
maximum efficiency levels are achieved.
The MatriX cylinder burner was developed and
manufactured by Viessmann in 1994 and due
to the extremely low emissions the innovation
was awarded the Business Award for the
Environment. 1.5 million MatriX burners have
been manufactured to date.
MatriX cylinder burner
MatriX burner in operation
1994 European Business Award for
the Environment

Ease of use
All functions are easily operated by hand. The
user-friendly dials allow for fast adjustment
of the heating and domestic hot water
temperature. The LCD display shows the
temperature settings.
Plug in clocks
Analogue plug-in clock for operation with
Vitotrol 100 room thermostat. Single channel
for heating, 24 hour.
Digital plug-in clock for operation with Vitotrol
100 room thermostat. Two channel for heating
and DHW, 7 day.
1Pressure gauge
2LCD display
3Dial for water
temperature
4Dial for central heating /
weather compensation
adjustment
5On/off button with
reset function
6Interchangeable panel
for the installation of the
Vitotrol 100 UTD-RF2
receiver / UTA-RF1
receiver / plug-in clock
Vitotrol 100 room thermostat
Vitotrol 100 UTDB
Vitotrol 100 UTA-RF1
Vitotrol 100 UTDB-RF2
Vitodens 100-W Controls and accessories
12
3 4
5
6
Functions of the controller
The Vitodens 100-W is supplied with a control
unit, featuring a built-in diagnostics system
and frost protection. When connected to
an outdoor temperature sensor the boiler
switches automatically to the weather
compensation mode. The dials are easy to
operate and enable fast adjustment of the
heating and DHW temperature.
Weather Compensation
Weather compensation controls are a great,
low cost way to make a boiler operate more
efficiently. They can save up to 12% of annual
fuel bills with the Vitodens 100-W – that‘s
on top of the big savings that you get from
changing to a condensing boiler. This must
be used in conjunction with an outdoor
temperature sensor (accessory).
Remote control of the heating system
from your living room
The Vitodens 100-W can be controlled by
wired or wireless remote controls
Vitotrol 100 room thermostat
Basic room thermostat with switched
output (two-point output)
Vitotrol 100 UTDB
Programmable room thermostat - 7 day
single channel (wired)
Vitotrol 100 UTDB-RF2
Plug-in programmable room thermostat, 2
channel - 7 day (wireless)
Vitotrol 100 UTA-RF1
Plug-in programmable room thermostat 1
channel, 24 hours (wireless)
Simply the best: the functions of the controller
All functions are easily operated by hand

10 /11
1
1
2
2
Pre-plumbing jig (optional accessory)
To help installation of the Vitodens 100-W, all
connections are checked for leaks during the
assembly process and only need to be tested
again once the boiler is hung.
To complete the overall look of the installation
a boiler fittings cover is included.
1Pre-plumbing jig with 2 cross bars
2Valve/fittings cover
Rear pipework mounting frame
(optional accessory)
The mounting frame has the same benefits as
the pre-plumbing jig but with the ability
to allow 50 mm behind the frame for wiring
upwards behind the unit.
To complete the overall look of the installation
a boiler fittings cover can also be included.
1Rear pipework mounting frame with 2
cross bars
2Valve/fittings cover
Ease of installation : Optional accessories for commissioning
Easy commissioning and maintenance
1. Installation with pre-plumbing jig
2. Mounting the boiler
3. Electrical connection
4. Commissioning
With a few simple steps the Vitodens 100-W
can be installed and operating.
The Vitodens 100-W gas fired condensing
boilers are consistently designed for simple
installation and time saving servicing. 1. Installation with pre-plumbing jig 2. Mounting the boiler
3. Electrical connection 4. Commissioning

Vitodens 100-W Viessmann 4-pipe principle
Viessmann Vitodens system boilers up to
35 kW installed together with a Vitocell 200
or 300 unvented cylinder are the perfect
combination to meet G3 building regulations
without the need for an energy cut-off valve and
cylinder overheat thermostat; these are now
built into the boiler.
Installation time will be reduced by up to 1 day
as the following are no longer required:
Energy cut off valve or safety valve
Expansion vessel and pump
Gauge and cylinder overheat thermostat
Part P certification
Compatibility with solar
As a manufacturer of the full range of renewable
energy technologies all Viessmann boilers are
100% compatible with solar thermal panels.
The Vitodens 100-W has the added advantage
of boiler suppression, when using Viessmann
solar panels and a dual coil cylinder. This
means that the hot water system will always
take advantage of solar power, whenever solar
energy is available and the boiler will only fire
to ‘top up‘ the heating process when absolutely
necessary – resulting in significant fuel savings.
Viessmann 4-pipe system
Optional weather
compensation sensor

12/13
1
3
4
6
7
7
2
1
3
4
6
5
2
Vitodens 100-W from 7.4 to 35 kW
1
8 litre expansion vessel
2
Modulating MatriX cylinder burner for
permanently low emissions
3
Inox-Radial stainless steel heat exchanger -
for high reliability and long service life
4
Modulating fan with air intake tube for low
noise and low power operation
5
Large capacity plate to plate heat exchanger
for convenient DHW heating (with
combination boiler)
6
Controller with integrated diagnostics system
7
Combined PRV and condense connection
Features and benefits summary
Same output for Heating and Hot Water (up
to 35 kW)
Combined PRV and condense connection,
saving time and expense
Improved installation options with
max. flue length up to 19 metres
New 19 kW system boiler
New case design improves service
accessibility and reduces noise
and weight
Integral filling loop
Range rate CH to 25% of maximum
output and match output to meet Building
Regulations
Simple conversion to LPG
Grundfos AquaBloc
5 year comprehensive warranty
for parts and labour
System boiler
Combination boiler

Vitodens 100-W Technical specification
Abmessungen
#
AHeizungsvorlauf Ø 20 mm
BGas-Brennwertheizgerät:
Speichervorlauf G ¾
Gas-Brennwertkombigerät:
Warmwasser Ø 16 mm
CGasanschluss G ¾
DGas-Brennwertheizgerät:
Speicherrücklauf G ¾
Gas-Brennwertkombigerät:
Kaltwasser Ø 16 mm
EHeizungsrücklauf Ø 20 mm
FKondenswasserablauf/Ablauf Sicherheitsventil:
Schlauch Ø 22 mm
GMontagehilfe mit Konsole und Armaturen
HAbdeckung Armaturen
KMontagerahmen mit Konsole und Armaturen
Maß a
– mit Montagerahmen und Austausch-Set ELM Leblanc mm 450
– mit Montagerahmen und Austausch-Set Saunier Duval mm 400
– mit Montagerahmen und Austausch-Set Chauffoteaux & Maury mm 400
Umwälzpumpe
AGas-Brennwertheizgerät, 19 kW
BGas-Brennwertheizgerät, 26 kW
CGas-Brennwertkombigerät, 26 kW
DGas-Brennwertheizgerät und Gas-Brennwertkombigerät, 35 kW
EObergrenze Arbeitsbereich
Abmessungen
#
AHeizungsvorlauf Ø 20 mm
BGas-Brennwertheizgerät:
Speichervorlauf G ¾
Gas-Brennwertkombigerät:
Warmwasser Ø 16 mm
CGasanschluss G ¾
DGas-Brennwertheizgerät:
Speicherrücklauf G ¾
Gas-Brennwertkombigerät:
Kaltwasser Ø 16 mm
EHeizungsrücklauf Ø 20 mm
FKondenswasserablauf/Ablauf Sicherheitsventil:
Schlauch Ø 22 mm
GMontagehilfe mit Konsole und Armaturen
HAbdeckung Armaturen
KMontagerahmen mit Konsole und Armaturen
Maß a
– mit Montagerahmen und Austausch-Set ELM Leblanc mm 450
– mit Montagerahmen und Austausch-Set Saunier Duval mm 400
– mit Montagerahmen und Austausch-Set Chauffoteaux & Maury mm 400
Umwälzpumpe
AGas-Brennwertheizgerät, 19 kW
BGas-Brennwertheizgerät, 26 kW
CGas-Brennwertkombigerät, 26 kW
DGas-Brennwertheizgerät und Gas-Brennwertkombigerät, 35 kW
EObergrenze Arbeitsbereich
Flow rate
Pressure head in mbar
Dimensions
- With a stand off frame mm 400
Dimensions
Circulating pump
A Heating flow Ø 22 mm
B Gas fired condensing boiler:
Cylinder flow G ¾
Gas condensing combi boiler:
Hot water 15 mm
C ¾ gas connection G
D Gas condensing boiler:
Memory return G ¾
Gas condensing combi boiler:
Cold water Ø 15 mm
A Gas fired System boiler, 19 kW
B Gas fired System boiler, 26 kW
C Gas fired Combination boiler, 26 kW
D Gas fired System and Combination boiler, 35 kW
E Maximum operating range
E Heating return Ø 22 mm
F Drain / drain safety valve:
Tube Ø 22 mm
G Pre-plumbing jig and fittings
H Valve/fittings cover
K Mounting frame and fittings

Model WB1C System Combination
Mode Unit 19 26 30 35 26 30 35
Rated CH Output
At Tf/Tr 50/30 ºC (condensing) kW 6.5 - 19 6.5 - 26.0 8.8 - 30.0 8.8 - 35.1 6.5 - 26.0 8.8 - 30.0 8.8 - 35.00
At Tf/Tr 80/60 ºC (non-condensing) kW 5.9 - 17.3 5.9 - 23.7 8.0 - 26.6 8.0 - 31.1 5.9 - 23.7 8.0 - 26.6 8.0 - 35.0
Rated Central Heating Input (net) kW 6.1 - 17.8 6.1 - 24.3 8.2 - 27.9 8.2 - 32.8 6.1 - 24.3 8.2 - 27.9 8.2 - 32.7
Rated Central Heating Input (gross) kW 7.7 - 19.8 7.7 - 27.0 9.1 - 30.9 9.1 - 36.4 7.7 - 27.0 9.1 - 30.9 9.1 - 36.4
Domestic Hot Water Output range kW - - - - 6.7 - 26.0 8.0 - 30.0 8.0 - 35.0
Max. Nat gas rate (CH mode) m3/h 1.9 2.6 33.5 2.6 33.5
Max LPG kg/H 1.4 1.9 2.2 2.6 1.9 2.2 2.6
Max. Nat gas rate (DHW mode) - - - - 2.9 3.3 3.9
Gas Supply pressure
Natural gas 20 20 20 20 20 20 20
LPG 37 37 37 37 37 37 37
Max Permissible gas supply Pressure
Natural gas 25 25 25 25 25 25 25
LPG 45 45 45 45 45 45 45
Efficiency/Emissions
Full load 100% % 88.2 88.3 88.3 88.2 88.3 88.3 88.2
Part load 30% % 97. 9 97. 9 97. 5 98.5 97.9 97.5 98.5
Seasonal Efficiency (SEDBUK) % 90.3 90.3 90.4 90.3 90.2 90.3 90.2
SEDBUK rating A A A A A A A
NOx classification class 5 (<39
mg/kWh)
5 (<39
mg/kWh)
5 (<39
mg/kWh)
5 (<39
mg/kWh)
5 (<39
mg/kWh)
5 (<39
mg/kWh)
5 (<39
mg/kWh)
DHW/CH
DHW performance @ 35˚C temp. rise l/min ----10.6 12.3 14.3
DHW temp. range ˚C ----30-60 30-60 30-60
Maximum mains water inlet pressure bar ----10 10 10
Min. mains water inlet pressure for max
DHW heat output
bar ----1 1 1
Minimum mains water inlet pressure for operation bar ----0.5 0.5 0.5
Minimum DHW flow rate for operation l/min ----0.5 0.5 0.5
Minimum CH system pressure - cold bar 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Maximum CH system pressure - hot bar 333333 3
Cylinder Capacity l ---- - - -
CH flow temp. range ˚C 30-80 30-80 30-80 30-80 30-80 30-80 30-80
General specification
Integral expansion vessel capacity ltr 888888 8
Integral expansion vessel pre-charge pressure bar 0.75 0.75 0.75 0.75 0.75 0.75 0.75
Max CH system water content using fitted
expansion vessel, @ 0.75bar and 80˚C
ltr 125 125 125 125 125 125 125
Total water capacity ltr 2.8 2.8 3.4 3.4 2.8 3.4 3.4
Lift weight kg 35 36 37 37 36 38 38
Total weight (incl packaging) kg 37 38 39 39 38 40 40
Electricity supply
230v 50 HZ 230v 50 HZ 230v 50 HZ 230v 50 HZ 230v 50 HZ 230v 50 HZ 230v 50 HZ
Internal fuse A 2.5 2.5 2.5 2.5 2.5 2.5 2.5
Maximimum power consumption W 102 107 106 154 119 134 154
Water protect. rating IP X4D IP X4D IP X4D IP X4D IP X4D IP X4D IP X4D
Flue temp. @50/30 - max CH output ºC 45 45 45 45 45 45 45
Flue temp. @50/30 - min CH output ºC 35 35 35 35 35 35 35
Flue temp. @80/60 - max CH output ºC 68 68 68 70 68 68 70
Flue products mas flow rate - NG - max CH output kg/h 3 0.1 41.1 49.0 56.9 41.1 49.0 56.9
Flue products mas flow rate - NG - min CH output kg/h 14.6 14.6 17.6 17.6 1.6 17.6 17.6
Flue products mas flow rate - LPG - max CH output kg/h 34 46.4 54.0 62 46.4 54.0 62
Flue products mas flow rate - LPG - min CH output kg/h 15.9 15.9 19.4 19.4 15.9 19.4 19.4
Gas council number 41- 819 -26 41- 819 -27 41- 819-28 41-819-29 47-819-20 41-819-21 41-819-22
Product ID CE-0085
BT0029
CE-0085
BT0029
CE-0085
BT0029
CE-0085
BT0029
CE-0085
BT0029
CE-0085
BT0029
CE-0085
BT0029
Dimens./Connect.
Inner flue duct diameter mm 60 60 60 60 60 60 60
Outer flue duct diameter mm 100 100 100 100 100 100 100
Boiler dimension H x W x D mm 700 x 400
x 350
700 x 400
x 350
700 x 400
x 350
700 x 400
x 350
700 x 400
x 350
700 x 400
x 350
700 x 400
x 350
DHW outlet & inlet mm 22 22 22 22 15 15 15
CH flow & return mm 22 22 22 22 22 22 22
Condensate & SV outlet combined mm 22 22 22 22 22 22 22
Gas mm 22 22 22 22 22 22 22
Max. flue length (BF) horizontal/vertical m 19 13.5 13.5 17 13.5 13.5 17
14/15
* The burner output has to be matched to the flue system, please observe the installation instructions.

Vitodens 100-W Flue applications
Horizontal wall terminal
3
Part no. 60/100 80/125
1Boiler flue connection
2Balanced flue external wall connection
(incl. wall bezels) 7441467 7435862
3Protective grille 7189821 7189821
4Balanced flue extension pipe
1 m long 7373224 7194321
0.5 m long 7373223 7194320
5Balanced flue bend
87° 7373226 7194323
2 x 45° 7373227 7194324
Fixing clamp 7176762 7176664
Horizontal flue terminal kit Z009350
Flue terminal 1 m, 2 x wall seals,
balanced flue bend
87°
A Combustion air
B Flue gas
A Ventilation air
B Flue gas
C (min.) 400 mm
Vertical outlet for sloping or flat roofs
1
Part no. 60/100 80/125
1Boiler flue connection
2Balanced flue roof outlet
Black 7373230 7373271
Terracotta 7373231 7373272
3Universal roof tile
Lead Free Flashing Black 7452499 7452501
Lead Free Flashing Terracotta 7452500 7452502
or Flat roof collar 7248017 7248017
4Balanced flue inspection 7373228 7199781
piece, straight (optional)
5Balanced flue sliding coupling (optional) 7373236 7194329
Balanced flue bend
87° 7373226 7194323
2 x 45° 7373227 7194324
Balanced flue pipe
1 m long 7373224 7194321
0.5 m long 7373223 7194320
Fixing clamp 7176762 7176664
1
2 3
3465
Vitodens boilers can be installed in
virtually all domestic applications, some
examples are illustrated.
The maximum flue length is the single
biggest consideration.
Maximum flue lengths are provided and have
already allowed for 2 bends of 87° (including
support bends).
For each additional 90° elbow reduce the
maximum flue length by 1 m, each additional
45° elbow by 0.5 m.
For concentric or balanced flue systems
the max. flue length can be up to 19 m. To
match the boiler output to the flue system
length, a concentric factor has to be set - see
installation instructions.
Flue applications
1Vertical, concentric roof
terminal – flat and pitched
2Communal flue system –
open flued
3Horizontal concentric
4Communal room
sealed chimney
5Vertical outside wall
system
6Chimney flue (open flued/
balance) with flexible duct

16/17
Open flue operation
Part no. 60/100 80/125
1Boiler flue connection
2Standard shaft pack (PPS, flexible) comprising: 7248206 7248213
Support bend
Support rail
Shaft cover (PPS)
Spacers (5 pce.)
or
Standard shaft pack (metal/PPS, rigid) 7452173 7452179
For twin flue chimneys (one flue for solid fuel boilers).
comprising:
Support bend
Support rail
Shaft cover (metal)
Terminal pipe (stainless steel)
Spacers (5 pce.)
Spacers (5 pce) 7190560 7147035
3Flexible pipe, on a roll, 12.5 m long. 7248208 7248216
Flexible pipe, on a roll, 25 m long. 7248207 7248215
4Connecting piece, for connecting residual 7248211 7248219
lengths of the flexible flue pipe.
Pipe lowering attachment incl. 25 m rope. 7248212 7248214
5Inspection piece, straight For installation in 7248210 7248218
the flexible flue pipe.
6Inspection piece, straight 7248216 7248312
7Vent bezel 7176728 7176634
8 Pipe
1 m long 7373214 7194310
0.5 m long 7373215 7194311
9Bend
87° 7373218 7194314
45° (2 pce) 7373219 7194315
or
Inspection tee 7373217 7194313
87°
Stainless steel extension for shaft cover 380 mm long 7373278 7373278
(metal/PPS, rigid)
Chimney flue kit (12.5 m) comprising: parts 2, 3, 7, 8, 9 ZK00029 ZK00031
2
ACombustion air
BFlue gas
CInspection aperture
D Connection piece
AVentilation air
BFlue gas
CInspection port
D Connection piece
E Ventilation aperture
6
Part no. 60/100 80/125
1Boiler flue connection
2Standard shaft pack (PPS, flexible) comprising: 7248206 7248213
Support bend
Support rail
Shaft cover (PPS)
Spacers (5 pce.)
or
Standard shaft pack (metal/PPS, rigid) 7452173 7452179
For twin flue chimneys (one flue for solid fuel boilers). comprising:
Support bend
Support rail
Shaft cover (metal)
Terminal pipe (stainless steel)
Spacers (5 pce.)
Spacers (5 pce) 7190560 7147035
3Flexible pipe, on a roll, 12.5 m long. 7248208 7248216
Flexible pipe, on a roll, 25 m long. 7248207 7248215
4Connecting piece, for connecting residual 7248211 7248219
lengths of the flexible flue pipe.
Pipe lowering attachment incl. 20 m rope. 7248212 7248214
5Inspection piece, straight For installation in 7248210 7248218
the flexible flue pipe.
6 Balanced flue inspection piece, straight. 7373228 7199781
7Wall bezel 7176760 7176662
8Balanced flue pipe
1 m long. 7373224 7194321
0.5 m long. 7373223 7194320
9Balanced flue bend 87° 7373226 7194323
Chimney flue kit (12.5 m) comprising: parts 2, 3, 7, 8, 9 ZK00029 ZK00031
Balanced flue operation

Vitodens 100-W
Electrical safety zone
Statutory requirements
The appliance is suitable only for installation in GB and IE and
should be installed in accordance with the rules in force. In GB
a Gas Safe Registered Installer must carry out the installation. It
must be carried out in accordance with the relevant requirements
of the:
Gas safety (installation and use) regulations (current issue)
It is in your own interest and safety to ensure that the law is
complied with.
In addition to the above regulations, this appliance must be
installed in accordance with the current IEE Wiring regulations
for electrical installation (BS 7671), local Building Regulations,
the Building Standards (Scotland) (Consolidation) Regulations,
bye laws of the local water undertaking and Health and Safety
Document NO. 635, ‘The Electricity at Work regulations 1989’.
In Ireland (IE), the installation must be carried out by a Competent
Person and installed in accordance with the current edition
of I.S.813 “Domestic Gas Installations”, the current Building
Regulations and references should be made to the current ETCI
rules for electrical installation.
It should also be in accordance with the relevant
recommendations in the current editions of the following British
Standards and Codes of Practice: BS 5449, BS 5546, BS 5440:1,
BS 5440:2, BS 6798, BS 7593, BS 6891, IGE/UP/7 and IS 813
for IE.
All registered installers are required to notify building control when
they have installed or exchanged a gas appliance in
a residential dwelling, this can be done via Gas Safe, in GB.
Gas Safe will then issue either a Building Compliance Certificate
(for England and Wales) or a Declaration of Safety (Scotland,
Northern Island, Isle of Man or appliances out of the scope of
Building Regulations) to the homeowner, which will confirm
that the work has been carried out by a competent Gas Safe
Registered Installer.
Viessmann trained installers can register for free through
www.viessmanninstallerportal.co.uk
Please note
Manufacturers instructions must not be taken in any way as
overriding statutory obligations.
Boiler Position
The following limitations must be observed when siting the boiler:
n The boiler is not suitable for external installation. The position
selected for the installation should be within the building,
unless otherwise protected by a suitable enclosure and must
allow adequate space for installation, servicing and operation
of the appliance and for air circulation around it.
n The position must allow for a suitable flue system and terminal
position. The boiler must be installed on a flat vertical wall
capable of supporting the weight of the appliance and any
ancillary equipment when full.
n If the boiler is to be fitted in a timber framed building it should
be fitted in accordance with ige/up/7. If in doubt advice must
be sought from the Institute of Gas Engineers.
Installation conditions for balanced flue operation
(appliance type C)
The Vitodens can be installed as appliance type C13x, C33x, C53x
or C63x to BS5440, for balanced flue operation independent of
the size and ventilation of the installation room.
It may, for example, be installed in recreation rooms, in other
living space, in ancillary rooms without ventilation, in cupboards
(open at the top) and recesses without maintaining minimum
clearances to combustible parts as well as in attic rooms (pitched
attics and ancillary rooms) where the balanced flue pipe can be
directly routed through the roof. Since the flue pipe connecting
piece for balanced flue operation is surrounded by combustion air
(coaxial pipe), no clearances towards combustible parts need to
be maintained (for further details, see the technical guide “Flue
gas systems for the Vitodens“).
The installation location must be safe from the risk of frost.
Installation conditions for open flue operation (appliance
type B)
(Type B23 and B33)
In rooms where air contamination through halogenated
hydrocarbons can occur, such as hairdressing salons, printing
shops, chemical cleaners, laboratories, etc., install the Vitodens
only as balanced flue system.
Wall mounted boilers should not be installed in areas subject to
very dusty conditions.
The installation location must be kept free from frost and must be
adequately ventilated.
Provide a condensate drain (combined with blow-off pipe for the
safety valve) in the installation room.
The maximum ambient temperature of the system should not
exceed 35 ºC.
Operation of the Vitodens in wet areas
The Vitodens is approved for installation in wet areas (e.g. bath or
shower rooms) (protection IP X4 D, splash-proof). When installing
the Vitodens in wet areas, observe the safety zones and minimum
wall clearances according to IEEE wiring regulation. The Vitodens
may be installed in safety zone 1, if hosed water (e.g. through
massage showers) is prevented.

18/19
Minimum clearances
700 mm to the front of the boiler and/or unvented cylinder.
Minimum clearances to the LHS or RHS are not required.
Electrical connections
Recommended cables and leads
NYM-J 3 × 2.5 mm2
– mains power
2-core min. 0.75 mm2
– Vitotrol 100, Type UTDB
– Outdoor temperature sensor
NYM-O 3 ×1.5 mm2
– Vitotrol 100, Type RT
– Vitotrol 100, Typ UTA
Ensure the power supply complies with the requirements of your
local power supply utility and current IEEE wiring regulations.
The mains cable can be protected by a fuse with a maximum
rating of 16 A.
It is recommended to install an AC/DC-sensitive RCD (RCD class
B) for DC (fault) currents that can occur with energy-efficient
equipment.
Make the power supply (230 V~, 50 Hz) via a permanent
connection.
Connect the supply cables and accessories at the terminals inside
the boiler.
Chemical anti-corrosion agents
Corrosion is generally avoided in correctly installed and operated
sealed heating systems.
Chemical anti-corrosion agents should be avoided where possible.
Some manufacturers of plastic pipes recommend the use of
chemical additives. In such cases, only use anti-corrosion agents
offered by the heating trade that have been approved for boilers
with DHW heating via single-walled heat exchangers (plate heat
exchanger or DHW un-vented cylinder).
Plastic pipe work for radiators
It is recommended to install a temperature limiter to restrict the
maximum temperature of plastic pipes in heating circuits with
radiators.
Attic or loft heating installation
The installation of a low water indicator specified as compulsory by
BS EN 1282 is not required when installing the Vitodens in an attic
or loft.
Underfloor heating system (UFH)
For heating systems with plastic pipes, we recommend the use of
impermeable pipes to prevent the diffusion of oxygen through the
pipe walls.
A temperature limiter is to be installed into the flow of the
underfloor heating circuit to limit the maximum temperature.
Combined safety valve (heating circuit) and condensate
drain
A safety valve in accordance with CE directive is integrated in the
Vitodens (operating pressure 3 bar).
The condensate pipe is connected to the discharge pipe of
the safety valve. The condensate hose supplied meets the
temperature requirements that are part of the CE certification.
Connecting the condensate pipe internally to the domestic waste
water system, either directly or via a tundish or washing machine
trap, is recommended.
Water quality/Frost protection
Unsuitable fill and top-up water increases the level of deposits
and corrosion and may lead to boiler damage.
Regarding the quality and volume of heating water, incl. fill and
top-up water, observe the Building Regulations Part L.
n Thoroughly flush the entire heating system prior to filling it
with water.
n Only use fill water of potable quality.
n Soften fill water with a hardness above 3.0 mol/m3 (300ppm),
e.g. with the small softening system for heating water
n An antifreeze additive suitable for heating systems can be mixed
with the fill water. The antifreeze manufacturer must verify its
suitability, otherwise damage to gaskets and diaphragms may
occur, as well as noise during heating operation. Viessmann
accepts no liability for damage or consequential damage as a
result.
Expansion vessel
An 8 litre expansion vessel is integrated as standard in the
Vitodens boiler, which is suitable for sealed heating systems with
a maximum water content of up to 100 litres:
n Pre-charge pressure 0,75 bar
n Content 8 litres
n Content CH water volume Vitodens
– 19 kW 2.8 litres
– 26 kW 2.8 litres
– 35 kW 3.4 litres
The size of the expansion vessel is subject to the heating system
specification and should be checked in each case. If the integrated
expansion vessel is not sufficient for the system then a second
expansion vessel has to be used.

9440 183 GB 05 / 2012
Copyright Viessmann
Duplication and alternative use only with prior written consent.
Subject to technical modifications.
Viessmann Limited
Hortonwood 30, Telford
Shropshire, TF1 7YP
Tel: [phone]
Fax: [phone]
www.viessmann.co.uk
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