Vailant ecoTEC plus 412 User manual

For the competent person
Installation manual
Air/flue gas systems
ecoTEC plus, HOME REGULAR, HOME COMBI,
HOME SYSTEM, ecoFIT sustain, ecoFIT pure
GB, IE
Installation manual
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. [phone]‑0 Fax [phone]‑2810
[email protected] www.vaillant.de

Contents
2Installation manual 0020200969_04
Contents
1 Safety .................................................................... 3
1.1 Action-related warnings ......................................... 3
1.2 Intended use .......................................................... 3
1.3 General safety information .................................... 3
1.4 CE certification....................................................... 5
1.5 Regulations (directives, laws, standards) .............. 5
2 Notes on the documentation .............................. 6
2.1 Observing other applicable documents ................. 6
2.2 Storing documents................................................. 6
2.3 Applicability of the instructions .............................. 6
3 Certified air/flue gas systems and
components ......................................................... 7
3.1 System overview, 60/100 mm diameter ................ 7
3.2 System overview, 80/125 mm diameter ................ 8
4 System conditions............................................... 9
4.1 Route of the air/flue pipe in buildings .................... 9
4.2 Location of the opening ......................................... 9
4.3 Disposing of condensate ....................................... 9
4.4 Maximum pipe lengths........................................... 9
5 Installation.......................................................... 13
5.1 Installing the connection piece for the
80/125 mm diameter air/flue pipe ........................ 13
5.2 Installing horizontal wall/roof ducts...................... 13
5.3 Installing the direct, rear, telescopic wall duct –
article number 0020228140................................. 16
5.4 Installing terminal kits for 60/100 mm diameter
air/flue gas systems............................................. 17
5.5 Installing the vertical roof duct ............................. 22
5.6 Installing the concentric connection,
60/100 mm diameter, to the air/flue gas
system for negative pressure .............................. 26
5.7 Installing the sliding sleeve, elbows and
extensions............................................................ 27
6 Customer service............................................... 38
Index ................................................................................... 39

Safety 1
0020200969_04 Installation manual 3
1 Safety
1.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in
accordance with the severity of the possible
danger using the following warning signs and
signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of
severe personal injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental
damage
1.2 Intended use
The air/flue pipes described here are con-
structed using state-of-the-art technology in
accordance with the recognised safety rules
and regulations. Nevertheless, there is still a
risk of injury or death to the system operator
or others or of damage to the products and
other property in the event of improper use or
use for which the products are not intended.
The air/flue pipes mentioned in these instruc-
tions must only be used in conjunction with
the product types mentioned in these instruc-
tions.
Any other use that is not specified in these
instructions, or use beyond that specified in
this document, shall be considered improper
use.
Intended use includes the following:
–observance of accompanying operating,
installation and servicing instructions for all
system components
–installing and fitting the product in accord-
ance with the product and system approval
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.
1.3 General safety information
1.3.1 Risk caused by inadequate
qualifications
The following work must only be carried out
by competent persons who are sufficiently
qualified to do so:
–Installation
–Disassembly
–Installation
–Start-up
–Maintenance
–Repair
–Decommissioning
▶Observe all instructions that are included
with the product.
▶Proceed in accordance with the current
state of technology.
▶Observe all applicable directives, stand-
ards, laws and other regulations.
1.3.2 Risk of poisoning due to escaping
flue gas
Improperly installed flue gas pipes may cause
flue gas to escape.
▶Before starting up the product, check that
the whole air/flue pipe is securely fastened
and leak-tight.
The flue gas pipe may become damaged by
unforeseeable external influences.
▶As part of the annual maintenance, inspect
the flue gas installation in terms of:
–external faults such as brittleness and
damage
–safe pipe connections and secure
fastenings
1.3.3 Risk of death from escaping flue
gas
▶Ensure that all inspection and measure-
ment openings in the air/flue pipe that are
within the building and can be opened are
always closed for start-up and during oper-
ation.
Flue gas may escape from leaking pipes or
damaged seals. Mineral-oil-based greases
can damage the seals.

1 Safety
4Installation manual 0020200969_04
▶When installing the flue gas installation,
use only flue gas pipes that are made from
the same material.
▶Do not install any damaged pipes.
▶File off sharp burrs and chamfer the ends
of the pipes before installing them, and
dispose of the shavings.
▶Never use mineral-oil-based grease for the
installation.
▶To facilitate the installation, use only wa-
ter, standard commercial soft soap or, if
required, the supplied lubricant.
Mortar residues, shavings, etc., in the flue
gas route may prevent the flue gas from flow-
ing outdoors as intended, and this flue gas
may escape into the dwelling instead.
▶After installation, remove all mortar
residues, shavings, etc., from the air/flue
pipe.
1.3.4 Risk of death from leaks in the flue
gas route
Extensions that are not fixed to the wall or
ceiling may become disengaged due to sag-
ging or thermal expansion.
▶Ensure that every extension is fixed to the
wall or ceiling by means of a pipe clamp.
The distance between two pipe clamps
must not be greater than the length of the
extension, and must not exceed 2 m.
Condensate that collects inside the flue in
certain areas can damage the flue gas pipe
seals.
▶Install the horizontal flue pipe to the
product with a downward gradient.
–Downward gradient to the product: 3°
Note
3° corresponds to a downward
gradient of approx. 50 mm per
metre of pipe length.
1.3.5 Risk of fire and damage to
electronics caused by lightning
▶If the building is equipped with a lightning
protection system, incorporate the air/flue
pipe into the lightning protection.
▶If the flue gas pipe (parts of the air/flue
pipe situated outside the building) contains
metal materials, incorporate it into the po-
tential equalisation system.
1.3.6 Risk of injury from ice formation
Where air/flue pipes penetrate the roof, the
water vapour contained in flue gas may pre-
cipitate as ice on the roof or the roof struc-
tures.
▶Ensure that this ice formation does not
slide from the roof.
1.3.7 Risk of damage to the structure of
the building due to moisture
As a result of improper installation, water may
penetrate the building and cause material
damage.
▶Observe the definitions in the directives for
the planning and implementation of roofs
with seals.
1.3.8 Product damage caused by adjacent
channel vents
1 m
1 m
3 m
H › 0
Extremely damp exhaust air escapes from
the channel vents. This may condense in the
air pipe and cause damage to the product.
▶Observe the requirements for minimum
clearances in accordance with the illustra-
tion.
1.3.9 Requirements for the air/flue pipe
opening
As a result of improper installation, water may
penetrate the building and cause material
damage.

Safety 1
0020200969_04 Installation manual 5
▶Observe the requirements for the air/flue
pipe opening in the boiler's installation
instructions.
1.3.10 Risk of material damage caused by
using an unsuitable tool
▶Use the correct tool to tighten or loosen
screw connections.
1.4 CE certification
The heat generators are certified as gas con-
sumption appliances with attached flue gas
installation in accordance with the EU gas ap-
pliances directive 2009/142/EC. This Install-
ation Manual is a component of the certifica-
tion and is cited in the type testing certificate.
In compliance with the regulatory statutes of
this installation manual, the proof of usabil-
ity of the elements identified by Vaillant article
numbers that are designed for the flue pipe is
provided. If you do not use certified elements
for the Vaillant air/flue gas pipe when in-
stalling the heat generators, this voids the CE
conformity of the heat generator. We there-
fore strongly recommend that you fit Vaillant
air/flue gas systems.
1.5 Regulations (directives, laws,
standards)
▶Observe the national regulations, stand-
ards, guidelines and laws.

2 Notes on the documentation
6Installation manual 0020200969_04
2 Notes on the documentation
2.1 Observing other applicable documents
▶You must always observe the installation instructions for
the installed heat generator.
2.2 Storing documents
▶Pass these instructions and all other applicable docu-
ments on to the system operator.
2.3 Applicability of the instructions
These instructions apply only for the heat generators named
in the other applicable documents, hereinafter referred to as
the "product".

Certified air/flue gas systems and components 3
0020200969_04 Installation manual 7
3 Certified air/flue gas systems and components
3.1 System overview, 60/100 mm diameter
Art. no. Air/flue gas systems, concentric
0020223472 Vertical roof duct (black, RAL 9005), with collar
303982 Vertical ridge roof duct
0020228140 Direct, rear-side, telescopic flue gas pipe
0020219517 Horizontal wall duct, 0.7 m
0020219518 Horizontal telescopic wall duct (only available in black)
0020219519 Horizontal wall duct, 1.7 m
3.1.1 Components
The following table lists the air/flue gas systems that are permitted as part of the system certification, along with their certified
components.
Optional connection accessories Art. no. 0020223472 303982 0020228140 0020219517
0020219519
0020219518
Extension (PP), concentric, 470 mm,
60/100 mm diameter
303902 X X X X
Extension (PP), concentric, 970 mm,
60/100 mm diameter
303903 X X X X
Extension (PP), concentric, 1970 mm,
60/100 mm diameter
303905 X X X X
Extension (PP), concentric, 3960 mm,
60/100 mm diameter 1)
0020138174 X X X X
45° elbow (2 x), concentric 303911 X X X X
87° elbow, concentric 303910 X X X X
Pipe clamps (5 x), 100 mm diameter 303821 X X X X
Adjustable pipe clamps (3 x), 100 mm
diameter
303935 X X X X
Sliding sleeve 303915 X X X X
Pitched roof tile 009076
(black)
X
Universal pitched roof tile 303980 X
Flat roof penetration collar 009056 X
Telescopic extension, 440-690 mm,
60/100 mm diameter
303906 X X
Telescopic offset piece 303919 X X
Black terminal kit for horizontal air/flue
pipe
0020219537 X X
Variable terminal kit (VTK), black2) 0020219529 X X X
Variable terminal kit (VTK), white2) 0020219530 X
Extension for variable terminal kit (VTK),
60 mm diameter, 1 m, black2)
0020219539 X X X
Extension for variable terminal kit (VTK),
60 mm diameter, 1 m, white2)
0020219540 X
87° elbow for variable terminal kit (VTK),
black2)
0020219543 X X X
87° elbow for variable terminal kit (VTK),
white2)
0020219544 X
45° elbow (2 x) for variable terminal kit
(VTK), black
0020219551 X X X
1) To reduce the pipe connections that need to be inspected, 4 m extensions are offered on request. (Special delivery with minimum
purchasing quantity and with no right of return). The required downward gradient is also 3°. A height of 200 mm is therefore required for
the 4 m extension. Take the height into consideration when selecting the installation site.
2) Delivery with pipe clamps

3 Certified air/flue gas systems and components
8Installation manual 0020200969_04
Optional connection accessories Art. no. 0020223472 303982 0020228140 0020219517
0020219519
0020219518
45° elbow (2 x) for variable terminal kit
(VTK), white
0020219552 X
Deflector set, DN 60, PP, black 0020219533 X X X
Deflector set, DN 60, PP, white 0020219534 X
1) To reduce the pipe connections that need to be inspected, 4 m extensions are offered on request. (Special delivery with minimum
purchasing quantity and with no right of return). The required downward gradient is also 3°. A height of 200 mm is therefore required for
the 4 m extension. Take the height into consideration when selecting the installation site.
2) Delivery with pipe clamps
3.2 System overview, 80/125 mm diameter
Art. no. Air/flue gas systems, concentric
303209 Horizontal roof duct
303200 Vertical roof duct
3.2.1 Components
The following table lists the air/flue gas systems that are permitted as part of the system certification, along with their certified
components.
Optional connection accessories Art. no. 303200 303209
Connection piece (screw holes, 4 x) 303926 X X
Connection piece with bayonet connection 0020147469 X X
Extension (PP), concentric, 470 mm, 80/125 mm diameter 303202 X X
Extension (PP), concentric, 970 mm, 80/125 mm diameter 303203 X X
Extension (PP), concentric, 1970 mm, 80/125 mm diameter 303205 X X
45° elbow (2 x), concentric, 80/125 mm diameter 303211 X X
87° elbow, concentric, 80/125 mm diameter 303210 X X
Pipe clamps (5 x), 125 mm diameter 303616 X X
Sliding sleeve, 80/125 mm diameter 303215 X X
Pitched roof tile 009076 (black) X
Universal pitched roof tile 303980 X
Flat roof penetration collar 009056 X

System conditions 4
0020200969_04 Installation manual 9
4 System conditions
4.1 Route of the air/flue pipe in buildings
The air/flue system should be as short as possible and run
as straight as possible.
▶Do not arrange several elbows or inspection elements
immediately after each other.
As a result of standards relating to the hygiene of drinking
water, water pipes must be protected against impermissible
heating.
▶Lay the air/flue pipe separately from the drinking water
pipes.
It must be possible to check and, if required, clean the entire
length of the flue gas route.
It must be possible to remove the air/flue pipe again with
minimal effort (no time-consuming structural or cementing
work in the living area, but screwed-in casing instead). If they
are arranged in shafts, they are usually easy to remove.
4.2 Location of the opening
The location of the flue gas installation opening must comply
with the relevant applicable international, national and/or
local regulations.
▶Align the opening of the flue gas installation in such a
way that ensures a secure outward flow and distribution
of the flue gases and prevents these gases from re-en-
tering the building through openings (windows, air intake
openings and balconies).
4.3 Disposing of condensate
Local regulations may stipulate the minimum quality of any
condensate that may enter the public waste-water system. If
required, a condensate neutraliser must be used.
▶When disposing of the condensate into the public waste-
water system, observe the local regulations.
▶Only use corrosion-resistant piping material for removing
condensate.
4.4 Maximum pipe lengths
4.4.1 Maximum pipe length for horizontal wall
duct
A
A Maximum pipe length
4.4.2 Maximum pipe length of the horizontal wall
duct with vertical terminal kit (60/100 mm
diameter only)
A
B
A Concentric pipe length B Outdoor pipe length
4.4.3 Maximum pipe length for vertical roof duct
A
A Maximum pipe length

4 System conditions
10 Installation manual 0020200969_04
4.4.4 Maximum pipe lengths, 60/100 mm diameter
4.4.4.1 ecoTEC plus, HOME
Air/flue gas system Art. no. ecoTEC plus 412 (VU 126/6-5 OV ecoTEC plus)
ecoTEC plus 415 (VU 156/6-5 OV ecoTEC plus)
ecoTEC plus 418 (VU 186/6-5 OV ecoTEC plus)
ecoTEC plus 424 (VU 246/6-5 OV ecoTEC plus)
ecoTEC plus 430 (VU 306/6-5 OV ecoTEC plus)
VU 126/6-5 OVZ (H-GB) ecoTEC plus 412
VU 156/6-5 OVZ (H-GB) ecoTEC plus 415
VU 186/6-5 OVZ (H-GB) ecoTEC plus 418
VU 246/6-5 OVZ (H-GB) ecoTEC plus 424
VU 306/6-5 OVZ (H-GB) ecoTEC plus 430
VU 356/6-5 OVZ (H-GB) ecoTEC plus 435
HOME REGULAR 12 -A (H-GB)
HOME REGULAR 15 -A (H-GB)
HOME REGULAR 18 -A (H-GB)
HOME REGULAR 25 -A (H-GB)
HOME REGULAR 30 -A (H-GB)
HOME COMBI 25 -A (H-GB)
HOME COMBI 30 -A (H-GB)
HOME COMBI 35 -A (H-GB)
HOME SYSTEM 12 -A (H-GB)
HOME SYSTEM 15 -A (H-GB)
HOME SYSTEM 18 -A (H-GB)
HOME SYSTEM 25 -A (H-GB)
Max. concentric pipe length
Horizontal wall/roof duct 0020219517
0020219518
0020219519
0020228140
10 m
plus 1 x 87° elbow
The inclusion of additional elbows in the flue gas installation reduces the pipe length as
follows:
–By 0.5 m for each 45° elbow
–By 1.0 m for each 87° elbow
Variable terminal kit 0020219529
0020219530
(with
0020219517
and
0020219518
only)
The maximum concentric pipe length that is specified above is reduced as follows:
–By 0.5 m with the variable terminal
–By 0.5 m with each metre of VTK pipe
–By 0.5 m with each 87° elbow
–By 0.5 m for every two 45° elbows
Vertical roof duct 0020223472
303982
10 m
The inclusion of additional elbows in the flue gas installation reduces the pipe length as
follows:
–By 0.5 m for each 45° elbow
–By 1.0 m for each 87° elbow
4.4.4.2 ecoFIT
Air/flue gas system Art. no. VUW 256/6-3 (H-GB) ecoFIT pure 825
VUW 306/6-3 (H-GB) ecoFIT pure 830
VUW 356/6-3 (H-GB) ecoFIT pure 835
VUW 256/6-3 (H-GB) ecoFIT sustain 825
VUW 306/6-3 (H-GB) ecoFIT sustain 830
VUW 356/6-3 (H-GB) ecoFIT sustain 835
VU 126/6-3 (H-GB) ecoFIT pure 612
VU 156/6-3 (H-GB) ecoFIT pure 615
VU 186/6-3 (H-GB) ecoFIT pure 618
VU 256/6-3 (H-GB) ecoFIT pure 625
VU 306/6-3 (H-GB) ecoFIT pure 630
VU 126/6-3 OV (H-GB) ecoFIT pure 412
VU 156/6-3 OV (H-GB) ecoFIT pure 415
VU 186/6-3 OV (H-GB) ecoFIT pure 418
VU 256/6-3 OV (H-GB) ecoFIT pure 425
VU 306/6-3 OV (H-GB) ecoFIT pure 430
VU 356/6-3 OV (H-GB) ecoFIT pure 435
Max. concentric pipe length
Horizontal wall/roof duct 0020219517
0020219518
0020219519
0020228140
10 m
plus 1 x 87° elbow
The inclusion of additional elbows in the flue gas installation reduces the
pipe length as follows:
–By 0.5 m for each 45° elbow
–By 1.0 m for each 87° elbow

System conditions 4
0020200969_04 Installation manual 11
Air/flue gas system Art. no. VUW 256/6-3 (H-GB) ecoFIT pure 825
VUW 306/6-3 (H-GB) ecoFIT pure 830
VUW 356/6-3 (H-GB) ecoFIT pure 835
VUW 256/6-3 (H-GB) ecoFIT sustain 825
VUW 306/6-3 (H-GB) ecoFIT sustain 830
VUW 356/6-3 (H-GB) ecoFIT sustain 835
VU 126/6-3 (H-GB) ecoFIT pure 612
VU 156/6-3 (H-GB) ecoFIT pure 615
VU 186/6-3 (H-GB) ecoFIT pure 618
VU 256/6-3 (H-GB) ecoFIT pure 625
VU 306/6-3 (H-GB) ecoFIT pure 630
VU 126/6-3 OV (H-GB) ecoFIT pure 412
VU 156/6-3 OV (H-GB) ecoFIT pure 415
VU 186/6-3 OV (H-GB) ecoFIT pure 418
VU 256/6-3 OV (H-GB) ecoFIT pure 425
VU 306/6-3 OV (H-GB) ecoFIT pure 430
VU 356/6-3 OV (H-GB) ecoFIT pure 435
Max. concentric pipe length
Variable terminal kit 0020219529
0020219530
(with
0020219517 and
0020219518
only)
The maximum concentric pipe length that is specified above is reduced as
follows:
–By 0.5 m with the variable terminal
–By 0.5 m with each metre of VTK pipe
–By 0.5 m with each 87° elbow
–By 0.5 m for every two 45° elbows
Vertical roof duct 0020223472
303982
10 m
The inclusion of additional elbows in the flue gas installation reduces the
pipe length as follows:
–By 0.5 m for each 45° elbow
–By 1.0 m for each 87° elbow
4.4.5 Maximum pipe lengths, 80/125 mm diameter
4.4.5.1 ecoTEC plus, HOME
Air/flue gas system Art. no. ecoTEC plus 412 (VU 126/6-5 OV ecoTEC plus)
ecoTEC plus 415 (VU 156/6-5 OV ecoTEC plus)
ecoTEC plus 418 (VU 186/6-5 OV ecoTEC plus)
ecoTEC plus 424 (VU 246/6-5 OV ecoTEC plus)
ecoTEC plus 430 (VU 306/6-5 OV ecoTEC plus)
VU 126/6-5 OVZ (H-GB) ecoTEC plus 412
VU 156/6-5 OVZ (H-GB) ecoTEC plus 415
VU 186/6-5 OVZ (H-GB) ecoTEC plus 418
VU 246/6-5 OVZ (H-GB) ecoTEC plus 424
VU 306/6-5 OVZ (H-GB) ecoTEC plus 430
VU 356/6-5 OVZ (H-GB) ecoTEC plus 435
HOME REGULAR 12 -A (H-GB)
HOME REGULAR 15 -A (H-GB)
HOME REGULAR 18 -A (H-GB)
HOME REGULAR 25 -A (H-GB)
HOME REGULAR 30 -A (H-GB)
HOME COMBI 25 -A (H-GB)
HOME COMBI 30 -A (H-GB)
HOME COMBI 35 -A (H-GB)
HOME SYSTEM 12 -A (H-GB)
HOME SYSTEM 15 -A (H-GB)
HOME SYSTEM 18 -A (H-GB)
HOME SYSTEM 25 -A (H-GB)
Max. concentric pipe length 1)
Horizontal wall/roof duct 303209 25 m
plus 1 x 87° elbow
Vertical roof duct 303200 25 m
1) The inclusion of additional elbows in the flue gas installation reduces the pipe length as follows:
–By 1.0 m for each 45° elbow
–By 2.5 m for each 87° elbow

4 System conditions
12 Installation manual 0020200969_04
4.4.5.2 ecoFIT
Air/flue gas system Art. no. VUW 256/6-3 (H-GB) ecoFIT pure 825
VUW 306/6-3 (H-GB) ecoFIT pure 830
VUW 356/6-3 (H-GB) ecoFIT pure 835
VUW 256/6-3 (H-GB) ecoFIT sustain 825
VUW 306/6-3 (H-GB) ecoFIT sustain 830
VUW 356/6-3 (H-GB) ecoFIT sustain 835
VU 126/6-3 (H-GB) ecoFIT pure 612
VU 156/6-3 (H-GB) ecoFIT pure 615
VU 186/6-3 (H-GB) ecoFIT pure 618
VU 256/6-3 (H-GB) ecoFIT pure 625
VU 306/6-3 (H-GB) ecoFIT pure 630
VU 126/6-3 OV (H-GB) ecoFIT pure 412
VU 156/6-3 OV (H-GB) ecoFIT pure 415
VU 186/6-3 OV (H-GB) ecoFIT pure 418
VU 256/6-3 OV (H-GB) ecoFIT pure 425
VU 306/6-3 OV (H-GB) ecoFIT pure 430
VU 356/6-3 OV (H-GB) ecoFIT pure 435
Max. concentric pipe length 1)
Horizontal wall/roof duct 303209 25 m
plus 1 x 87° elbow
Vertical roof duct 303200 25 m
1) The inclusion of additional elbows in the flue gas installation reduces the pipe length as follows:
–By 1.0 m for each 45° elbow
–By 2.5 m for each 87° elbow

Installation 5
0020200969_04 Installation manual 13
5 Installation
5.1 Installing the connection piece for the
80/125 mm diameter air/flue pipe
▶Convert the products that you want to connect to the
air/flue pipe (80/125 mm diameter) and that are equipped
with the product connection (60/100 mm diameter) at the
factory.
–The installation instructions for the product describe
how to install the 80/125 mm diameter connection
piece for the air/flue pipe.
5.2 Installing horizontal wall/roof ducts
5.2.1 Preparing the installation
Danger!
Risk of poisoning due to escaping flue
gas.
If you select an unsuitable installation site for
the air/flue pipe, flue gas may be allowed to
enter the building.
▶Observe the existing regulations with re-
gard to the clearances to windows and
ventilation openings.
Danger!
Risk of poisoning due to escaping flue
gas.
Condensate that collects in a particular place
can damage the flue gas pipe seals.
▶Lay the horizontal flue pipe with a down-
ward gradient of 3° to the product; 3° cor-
responds to a downward gradient of ap-
prox. 50 mm per metre of pipe length.
▶In doing so, note that the air/flue pipe
must be centred in the wall hole.
▶Determine the installation site for the air/flue pipe.
▶When installing the product near a light source, point out
to the operator that they must clean the opening regu-
larly. Otherwise, due to the insects that the light may at-
tract, the opening may become dirty.
Installation example
Horizontal roof duct
1.
2.
1 Direct installation 2 Offset installation
–Minimum dimensions for the dormer: Height x width:
300 mm x 300 mm
▶Determine the installation site for the boiler (→Installation
instructions for the boiler).
▶Ensure that all clearances required for installation and
maintenance are available and that the air/flue gas sys-
tem can be installed in accordance with these instruc-
tions.
▶Secure the installation template that is supplied with the
boiler to the wall.
▶Use a plumb-bob or spirit level to check whether the
central line of the installation template is vertical.
Conditions: Top connection, air/flue pipe to the rear
125 140
If you install the air/flue pipe directly on the rear of the boiler,
the installation template shows the position of the wall duct
for horizontal installation with the connection at the top

5 Installation
14 Installation manual 0020200969_04
Conditions: Top connection, air/flue pipe to the side
A
A = 125 mm
If you want to install the air/flue pipe laterally, you can de-
termine the position of the wall duct by carefully offsetting the
central line of the wall duct that is marked on the installation
template.
▶Calculate the required gradient in accordance with the
length of the flue gas pipe and then mark the position for
the wall duct.
5.2.2 Determining the clearance to the external
wall
A140
A
B
140
1.
2.
1. Flue gas pipe to the
rear
2. Flue gas pipe to the
side
A Clearance to the ex-
ternal wall
B Clearance to the in-
ternal wall: 125 mm
▶Measure the clearance (A) from outside of the wall to the
centre of the connection piece.
5.2.3 Installing the 60/100 mm diameter
horizontal wall/roof duct, article number
0020219517
5.2.3.1 Scope of delivery
65 832
Ø167
65
30
40
1
2345
1 Wall collar, 100 dia-
meter (2 pcs)
2 Horizontal wall duct
3 40 mm clamp
4 87° elbow
5 30 mm clamp
5.2.3.2 Shortening the air/flue gas pipe
1. Determine the clearance to the external wall.
(→Page 14)
A + 75
13
2. Shorten the flue gas pipe and the air pipe by the same
length when they are assembled.
Note
Disassembling the flue gas pipe and the air
pipe damages the latching lugs in the ter-
minal.
Conditions: Additional extensions and elbows required
▶Install the extensions. (→Page 28)
–All of the sleeves for the flue gas pipe must point
towards the terminal.
▶Install the 45° elbow. (→Page 31)
▶Install the 87° elbow. (→Page 32)
5.2.3.3 Installing the wall duct
13
3°
1
140
1. Drill a hole.

Installation 5
0020200969_04 Installation manual 15
–Diameter: 125 mm
Note
If the wall duct can be accessed from the
exterior of the building, you can drill the hole
with a diameter of 110 mm and install the
wall duct with the wall collar from outside.
2. Slide the air/flue pipe (1) with the flexible external collar
through the wall.
3. Pull the flue pipe back until the external collar forms a
tight seal on the external wall.
4. Secure the flue pipe with mortar and leave the mortar to
harden.
5. Install the wall collar on the inside of the wall.
6. Connect the wall/roof duct to the product using ex-
tensions, elbows and, if required, a sliding sleeve.
(→Page 16)
5.2.3.4 Installing the roof duct
140
13
3°
1
▶Insert the air/flue pipe (1) with no external collar into the
dormer.
5.2.4 Installing the horizontal telescopic wall/roof
duct,60/100 mm diameter, article number
0020219518
5.2.4.1 Scope of delivery
65
Ø167
65
30
40
456-698
1
2345
1 Wall collar, 100 dia-
meter (2 pcs)
2 Horizontal telescopic
wall duct
3 40 mm clamp
4 87° elbow
5 30 mm clamp
5.2.4.2 Installing the wall duct
13
3°
1
120
336 - 578
1. Drill a hole.
–Diameter: 125 mm
Note
If the wall duct can be accessed from the
exterior of the building, you can drill the hole
with a diameter of 110 mm and install the
wall duct with the wall collar from outside.
12
2. Determine the clearance to the external wall.
(→Page 14)
3. Set the telescopic wall duct to the correct length.
–Note that the TOP symbol must point upwards on
both ends.
Danger!
Risk of poisoning due to escaping flue
gas.
Flue gas can escape if a flue gas pipe is dam-
aged.
▶Only use the self-tapping screw provided.
4. Secure the air pipes to each other by screwing the over-
lapping air pipes together using the supplied self-tap-
ping screws on the underside (1).
5. Seal the gap in the telescopic air pipe using the sup-
plied adhesive tape (2).
6. Slide the air/flue pipe (1) with the flexible external collar
through the wall.
7. Pull the flue pipe back until the external collar forms a
tight seal on the external wall.
8. Secure the flue pipe with mortar and leave the mortar to
harden.
9. Install the wall collar on the inside of the wall.
10. Connect the wall/roof duct to the product using ex-
tensions, elbows and, if required, a sliding sleeve.
(→Page 16)

5 Installation
16 Installation manual 0020200969_04
5.2.4.3 Installing the roof duct
13
3°
1
336 - 578 120
▶Insert the air/flue pipe (1) without the external collar into
the dormer.
5.2.5 Connecting the product
45
321
6
7
1. Install the product (7) –see the installation instructions
for the product.
2. Connect the 87° elbow (1) to the connection piece for
the air/flue pipe (6).
3. Fit the sliding sleeve (3) with the sleeve as far as it will
go onto the wall/roof duct (4) or the extension (5).
4. If required, install the extensions.
5. Connect the sliding sleeve to the 87° elbow.
6. Install the air clamp (2) for the sliding sleeve.
7. Alternatives 1 / 2
Conditions: Wall/roof duct without extension
▶Install the sliding sleeve. (→Page 27)
7. Alternatives 2 / 2
Conditions: Wall/roof duct with extension
▶Install the extensions. (→Page 28)
▶Install the 45° elbow. (→Page 31)
▶Install the 87° elbow. (→Page 32)
▶Install the sliding sleeve. (→Page 27)
▶Connect all of the disconnection points with air
clamps. (→Page 37)
5.3 Installing the direct, rear, telescopic wall
duct –article number 0020228140
5.3.1 Scope of delivery
Ø167
456 - 698
34
2
1
1 Telescopic wall duct
2 Wall collar
3 Safety screws (4 pcs)
4 Sealing tape
5.3.2 Determining the pipe length and the
location of the wall duct
120 - 500
Y + 24 - 28
1. Determine the pipe length (→Installation instructions for
the boiler) and define the location of the wall duct.
2. Measure the clearance Y from the external wall to the
installation surface for the boiler.
3. Set the required pipe length: Y + 24 mm to 28 mm.
–If you install the wall collar, add 12 mm to the total
pipe length.
–If the opening is below a roof projection or a ho-
rizontal surface, you can pull the wall duct up to
500 mm out of the wall in order to guarantee that the
flue gases are extracted without any obstructions.
Note
Do not shorten the telescopic flue pipe.
If the required pipe length cannot be
achieved, use extensions or the horizontal
wall/roof duct.

Installation 5
0020200969_04 Installation manual 17
5.3.3 Securing the telescopic pipe
12
1. Set the telescopic wall duct to the correct length.
–Note that the TOP symbols at both ends must point
upwards.
Danger!
Risk of poisoning due to escaping flue
gas.
Flue gas can escape if a flue gas pipe is dam-
aged.
▶Only use the self-tapping screw provided.
2. Secure the air pipes to each other by screwing the over-
lapping air pipes together using the supplied self-cutting
screws (1) on the underside.
3. Seal the gap on the telescopic air pipe using the sup-
plied adhesive tape (2).
5.3.4 Installing the wall duct
1. Drill a hole.
–Diameter: 110 mm
2. Push the air/flue pipe from outside and through the wall
and the terminals.
≥24
≤28
Ø3
1
3. Pull the wall duct out to the required depth.
4. Use the safety screws to secure the wall duct.
–Use at least three of the six holes (1) that are avail-
able in the terminals to secure the flue pipe.
5. Install the wall collar.
6. Before you install the boiler, check that the wall duct is
safely secured in place.
7. Seal the installation gap using a suitable material (e.g.
mortar).
8. Install the boiler (→Installation instructions for the
boiler).
5.4 Installing terminal kits for 60/100 mm
diameter air/flue gas systems
5.4.1 Minimum clearances for the flue gas
terminal
You must comply with the minimum clearances for the flue
gas terminal that are defined in BS 5440, unless the boiler's
manufacturer has given approval to use shorter minimum
clearances that are not considered to be safety-critical.
Vaillant has reduced the minimum clearances for the flue
gas terminal and specifies this in the installation instructions
for the boiler. These are minimum clearances that are to be
used for all types of installation, except for the installation of
the variable terminal kit (VTK).
If a VTK is connected to a horizontal flue gas pipe, terminal
clearances are reduced for the air inlet. The terminal clear-
ances on the "new" flue outlet at the end of VTK remain un-
changed.
On the VTK, the minimum clearances for the air inlet A, B
and C (→Installation instructions for the boiler) to openings
(e.g. a window) are reduced to 150 mm. This means that the
terminal will be at the horizontal flue gas pipe when a VTK is
connected to the air inlet and can therefore be installed at a
clearance of less than 300 mm from a window opening or a
ventilation tile.
5.4.2 Black terminal kit –article number
0020219537
5.4.2.1 Scope of delivery
321
1 Wall collar
2 Opening piece
3 End pipe

5 Installation
18 Installation manual 0020200969_04
5.4.2.2 Installing the black terminal (change of
colour)
Note
You must install the terminal kits before installing
the flue gas pipe.
Conditions: Terminal secured using screws
▶Undo the lateral screws.
A
B
1. Detach the terminal with the flue gas pipe by pushing
the air pipe to the floor.
Note
You cannot reuse the terminal as detaching
the terminal damages the latching lugs in the
terminal.
2. Pull the terminal from the air pipe together with the flue
gas pipe.
A
B
3. Release the catch between the opening piece and the
end pipe.
4. Pull the end pipe from the opening piece.
5. Release the catch between the opening piece and the
flue gas pipe.
6. Pull the opening piece from the flue gas pipe.
7. Slide the new opening piece onto the flue pipe until you
hear the opening piece click into place.
8. Slide the end pipe onto the opening piece until you hear
the end pipe click into place.

Installation 5
0020200969_04 Installation manual 19
9. Slide the flue pipe with the new terminal into the air pipe
until you hear the terminal click into place.
Conditions: Terminal secured using screws
▶Attach the terminal using the side screws.
5.4.3 Deflector set
5.4.3.1 Scope of delivery
321
1 Wall collar
2 Opening piece
3 Deflector
–Deflector set, DN 60, PP, black (article number
0020219533)
–Deflector set, DN 60, PP, white (article number
0020219534)
5.4.3.2 Installing the deflector set
Conditions: Replacing the deflector set (change of colour)
▶In the event of a change of colour, replace the deflector
set, including the wall collar (→Page 18).
▶Install the deflector, instead of the end pipe, on the
opening piece.
Conditions: Replacing the end pipe only
A
B
▶Release the catch between the opening piece and the
end pipe.
▶Pull the end pipe from the opening piece.
▶Slide the deflector onto the opening piece until you hear
the deflector click into place.
5.4.3.3 Adjusting the deflector
45°
45°
▶Set the terminal to the required position.
–The flue gas stream is directed upwards at an angle
of approx. 45° when the deflector is set in the centre
position.
–If necessary, the deflector terminal can be rotated 45°
to the left or right. These adjustment options mean
that the flue gas pipe can be further optimised.

5 Installation
20 Installation manual 0020200969_04
5.4.4 Variable terminal kit (VTK)
5.4.4.1 Scope of delivery
1 2
3
4
1 87° elbow (2 x)
2 Pipe clamps (3 x)
3 Extension (1 m) without
sleeve
4 Extension (1 m) with
sleeve
–Variable terminal kit, black, article number 0020219529
–Variable terminal kit, white, article number 0020219530
5.4.4.2 Installing the variable terminal kit (VTK)
A
B
1. Release the catch between the opening piece and the
end pipe.
2. Pull the end pipe from the opening piece.
0°
3. Slide the first 87° elbow onto the opening piece until
you hear the 87° elbow click into place.
5.4.4.3 Installing extensions
1. Install the flue gas pipe from the 87° elbow to the flue
outlet.
–Begin with the extension with the sleeve. To be able
to install the second 87° elbow with the end pipe,
you must install the extension without a sleeve last.
–Allow expansion space of 1 cm in each sleeve.
–Ensure that all disconnection points are absolutely
leak-tight.
100
80-100
2. Secure the extensions to the wall using the pipe
clamps.
–Use one pipe clamp for each extension directly be-
side the sleeve.
–Upstream of each elbow, install another pipe clamp
on the extension.