Vaillant ecoTEC plus VU Series User manual

en Air/flue pipe installation manual
ecoTEC plus
VU../VUW../VUI..
0020308120_02 - 29.09.2022

2Air/flue pipe installation manual 0020308120_02
Air/flue pipe installation manual
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 Validity of the instructions...................................... 6
3 Certified air/flue 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............................................. 10
4.1 Technical properties of the air/flue systems
from Vaillant for condensing products ................. 10
4.2 Route of the air/flue pipe in buildings .................. 10
4.3 Location of the terminal ....................................... 10
4.4 Disposing of condensate ..................................... 10
4.5 Clearance between combustible materials and
the components ................................................... 10
4.6 Maximum pipe lengths......................................... 10
5 Set-up.................................................................. 13
5.1 Installing the connector for the 80/125 mm
diameter air/flue pipe ........................................... 13
5.2 Installing horizontal wall/roof ducts...................... 13
5.3 Horizontal wall/roof duct, 60/100 mm diameter,
article number 0020219517................................. 15
5.4 Horizontal telescopic wall/roof duct,
60/100 mm diameter, article number
0020219518......................................................... 15
5.5 Connecting the product ....................................... 16
5.6 Installing terminal sets for 60/100 mm
diameter air/flue systems..................................... 17
5.7 Horizontal wall/roof duct, 60/100 mm diameter
(article number 303933, 0010035512) ................ 21
5.8 Installing terminal sets for 60/100 mm
diameter air/flue systems..................................... 22
5.9 Horizontal wall duct, 60/100 mm diameter
(article number 0010024718) .............................. 27
5.10 Installing the 80/125 mm diameter horizontal
wall/roof duct, article number 303209 or
0010035777......................................................... 31
5.11 Installing the vertical roof duct ............................. 32
5.12 Installing the concentric connection,
60/100 mm diameter, to the air/flue system for
negative pressure ................................................ 36
5.13 Installing the flue gas pipe on the external
wall....................................................................... 37
5.14 Installing the sliding sleeve, elbows and
extensions............................................................ 46
6 Customer service............................................... 55
Index ................................................................................... 56

0020308120_02 Air/flue pipe 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 symbols
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's end
user 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 in-
tended.
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 maintenance instructions
for all system components
–installing and setting up the product in ac-
cordance with the product and system ap-
proval
–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:
–Set-up
–Dismantling
–Installation
–Start-up
–Inspection and maintenance
–Repair
–Decommissioning
▶Proceed in accordance with current tech-
nology.
1.3.2 Risk of poisoning due to escaping
flue gas
Improperly installed flue pipework may cause
flue gas to escape.
▶Before starting up the product, check that
the whole air/flue pipe is securely fastened
and check it for tightness.
The flue pipework may become damaged by
unforeseeable external influences.
▶As part of the annual maintenance, inspect
the flue system 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 test open-
ings in the air/flue pipe that are within the
building and can be opened are always
closed for start-up and during operation.
Flue gas may escape from leaking pipes or
damaged seals. Mineral-oil-based greases
can damage the seals.
▶Do not install any damaged pipes.
▶Deburr 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 installation, use only water
or commercially available soft soap. If a

4Air/flue pipe installation manual 0020308120_02
lubricant is supplied with the product, use
this 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.
▶For changes of direction just upstream of
the elbow, install another pipe clamp.
Condensate that collects inside the flue in
certain areas can damage the flue pipework
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 pipework (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 extract 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 figure.
1.3.9 Requirements for the air/flue terminal
As a result of improper installation, water may
penetrate the building and cause material
damage.
▶Observe the requirements for the air/flue
terminal in the boiler's installation instruc-
tions.

0020308120_02 Air/flue pipe installation manual 5
1.4 CE certification
The heat generators are certified as gas-fired
boilers with associated flue systems in ac-
cordance with the Gas Appliances Regula-
tion (EU) 2016/426. This set-up instructions
are a component of the certification and are
cited in the type testing certificate. In compli-
ance with the regulatory statutes of these set-
up instructions, the proof of usability of the
elements identified by Vaillant article num-
bers that are designed for the air/flue pipe
is provided. If you do not use certified ele-
ments for the Vaillant air/flue 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 systems.
1.5 Regulations (directives, laws,
standards)
▶Observe the national regulations, stand-
ards, directives, ordinances and laws.

6Air/flue pipe installation manual 0020308120_02
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 end user.
2.3 Validity of the instructions
These instructions apply for the following products only:
Product Article num-
ber
VU 10CS/1-5 (N-GB) ecoTEC plus 610 0010036009
VU 15CS/1-5 (N-GB) ecoTEC plus 615 0010036010
VU 20CS/1-5 (N-GB) ecoTEC plus 620 0010036011
VU 25CS/1-5 (N-GB) ecoTEC plus 625 0010036012
VU 30CS/1-5 (N-GB) ecoTEC plus 630 0010036013
VU 35CS/1-5 (N-GB) ecoTEC plus 635 0010036014
VUW 20/26CS/1-5 (N-GB) ecoTEC plus 826 0010036015
VUW 25/32CS/1-5 (N-GB) ecoTEC plus 832 0010036016
VUW 30/36CS/1-5 (N-GB) ecoTEC plus 836 0010036017
VUW 30/40CS/1-5 (N-GB) ecoTEC plus 840 0010036018
VUI 30/40CS/1-5 (N-GB) ecoTEC plus 940 0010036114

0020308120_02 Air/flue pipe installation manual 7
3 Certified air/flue systems and components
3.1 System overview, 60/100 mm diameter
System
group
Article number Air/flue systems, concentric
A 0020223472 Vertical roof duct (black, RAL 9005), with collar
B 303982 Vertical ridge roof duct
C 0020219517¹Horizontal wall duct, 0.7 m
D 0020219518¹Horizontal telescopic wall duct (only available in black)
E 0020219519¹Horizontal wall duct, 1.7 m
F 0010035512²Horizontal wall duct, 0.7 m for multi-storey buildings
G 0010024718²Horizontal wall duct, for balcony installation and for installing the variable terminal set (VTK) in multi-
storey buildings
H 303933¹Horizontal wall duct, 0.7 m
1) In accordance with the construction regulation, installation in buildings higher than 18 m (11 m in Scotland) is not permit-
ted.
2) In accordance with the construction regulation, installation in buildings higher than 18 m (11 m in Scotland) is permitted.
3.1.1 Components
The following table lists the air/flue systems that are permitted as part of the system certification, along with their certified
components.
Optional connection accessories Article num-
ber
A B C, E D F G H
Extension (PP), concentric, 470 mm, 60/100 mm diameter 303902 X X X X X X X
Extension (PP), concentric, 970 mm, 60/100 mm diameter 303903 X X X X X X X
Extension (stainless steel), concentric, 970 mm, 60/100 mm dia-
meter ³
0010035514 X X X
Extension (PP), concentric, 1970 mm, 60/100 mm diameter 303905 X X X X X X X
Extension (PP), concentric, 3960 mm, 60/100 mm diameter ¹0020138174 X X X X X X X
45° elbow (2 pcs), concentric 303911 X X X X X X X
87° elbow, concentric 303910 X X X X X X X
Pipe clamp (5 pcs), 100 mm diameter 303821 X X X X X X X
Adjustable pipe clamps (3 pcs), 100 mm diameter 303935 X X X X X X X
Sliding sleeve 303915 X X X 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 X X X X X
Telescopic offset piece 303919 X X
Black terminal set for horizontal air/flue pipe 0020219537 X X
303934 X
Variable terminal set (VTK), black ²0020219529 X X
303942 X X
Variable terminal set (VTK), white ²0020219530 X
303946 X
Extension for variable terminal set (VTK), 60 mm diameter, 1 m,
black ²
0020219539 X X
303943 X X
Extension for variable terminal set (VTK), 60 mm diameter, 1 m,
white ²
0020219540 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. No returns accepted.) 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 In accordance with the construction regulation, installation on the external wall in buildings higher than 18 m (11 m in Scotland) is per-
mitted. The sleeve end of the extension must protrude at least 60 mm from the wall to comply with fire-protection requirements.

8Air/flue pipe installation manual 0020308120_02
Optional connection accessories Article num-
ber
A B C, E D F G H
Extension for variable terminal set (VTK), 60 mm diameter, 1 m,
white ²
303947 X
87° elbow for variable terminal set (VTK), black ²0020219543 X X
303944 X X
87° elbow for variable terminal set (VTK), white ²0020219544 X
303949 X
45° elbow (2 pcs) for variable terminal set (VTK), black 0020219551 X X
303945 X X
45° elbow (2 pcs) for variable terminal set (VTK), white 0020219552 X
303948 X
Deflector set, DN 60, PP, black 0020060584 X
Deflector set, DN 60, PP, white 0020060585 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. No returns accepted.) 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 In accordance with the construction regulation, installation on the external wall in buildings higher than 18 m (11 m in Scotland) is per-
mitted. The sleeve end of the extension must protrude at least 60 mm from the wall to comply with fire-protection requirements.
3.2 System overview, 80/125 mm diameter
System
group
Article number Air/flue systems, concentric
A 303200 Vertical roof duct
B 303209¹Horizontal wall/roof duct
C 0010035777²Horizontal wall duct, stainless steel
D 0010039735²External wall connector
E 0020042748¹External wall connector
1) In accordance with the construction regulation, installation in buildings higher than 18 m (11 m in Scotland) is not permitted.
2) In accordance with the construction regulation, installation in buildings higher than 18 m (11 m in Scotland) is permitted.
3.2.1 Components
The following table lists the air/flue systems that are permitted as part of the system certification, along with their certified
components.
Optional connection accessories Article number A B, C D, E
System, concentric, 80/125 mm diameter
Connector (screw holes, 4 x) 303926 X X X
Connector with bayonet connection 0020147469 X X X
Extension (PP), concentric, 470 mm, 80/125 mm diameter 303202 X X X
Extension (stainless steel), concentric, 960 mm, 80/125 mm diameter ¹0010035778 X
Extension (PP), concentric, 970 mm, 80/125 mm diameter 303203 X X X
Extension (PP), concentric, 1970 mm, 80/125 mm diameter 303205 X X X
45° elbow (x 2), concentric, 80/125 mm diameter 303211 X X X
87° elbow, concentric, 80/125 mm diameter 303210 X X X
Pipe clamp (5 pcs), 125 mm diameter 303616 X X X
Sliding sleeve, 80/125 mm diameter 303215 X X X
Pitched roof tile, black 009076 X X
Universal pitched roof tile 303980 X X
Flat roof penetration collar 009056 X X
System, concentric (stainless steel), 80/125 mm diameter
External wall console, adjustable from 50 to 300 mm, stainless steel 0020042749 X
External wall pipe bracket (stainless steel), 50–90 mm 0020042751 X
1 In accordance with the construction regulation, installation on the external wall in buildings higher than 18 m is permitted

0020308120_02 Air/flue pipe installation manual 9
Optional connection accessories Article number A B, C D, E
Extension for external wall pipe bracket (stainless steel), 90–280 mm 0020042752 X
Extension (stainless steel), concentric, 0.5 m 0020042753 X
Extension (stainless steel), concentric, 1.0 m 0020042754 X
Extension that can be shortened (stainless steel), concentric, 0.5 m 0020042755 X
Elbow (stainless steel), concentric, 87° 0020042756 X
Elbows (stainless steel), concentric (2 pcs), 45° 0020042757 X
Elbows (stainless steel), concentric (2 pcs), 30° 0020042758 X
Inspection piece (stainless steel), 0.25 m, concentric 0020042759 X
Rain penetration collar (stainless steel) for roof penetration 0020042760 X
1 In accordance with the construction regulation, installation on the external wall in buildings higher than 18 m is permitted

10 Air/flue pipe installation manual 0020308120_02
4 System conditions
4.1 Technical properties of the air/flue systems
from Vaillant for condensing products
Technical feature Description
Temperature resistance Adapted to the maximum
flue gas temperature of the
product.
Leak-tightness Adapted to the product for use
in buildings and outdoors.
A leak-tightness test must be
carried out at a test pressure
of 200 Pa. At a diameter of
50 mm, a test pressure of
1500 Pa must be used for the
test.
Condensate resistance For gas and oil fuels
Corrosion resistance Adapted to the gas and oil
condensing boiler
Clearance from combustible
materials
–Concentric air/flue pipe-
work: No clearance re-
quired
Installation site In accordance with the install-
ation instructions
Resistance to fire Normal level of flame resist-
ance (in accordance with EN
13501-1 Class E)
Fire resistance duration None:
The external pipe of the con-
centric air/flue pipe are not
flammable. A required fire res-
istance duration is provided by
shafts within the building.
4.2 Route of the air/flue pipe in buildings
The air/flue pipe 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 potable
water, potable water lines must be protected against imper-
missible heating.
▶Lay the air/flue pipe separately from the potable water
lines.
It must be possible to check and, if required, clean the entire
length of the flue gas route.
It should be possible to remove the air/flue pipe again with a
minimal amount of effort (preferably no time-consuming mor-
tising work in the living area, but screwed-in casing instead).
If they are arranged in shafts, they are usually easy to re-
move.
4.3 Location of the terminal
The location of the flue system terminal must comply with
the relevant applicable international, national and/or local
regulations.
▶Align the terminal of the flue system in such a way that
ensures a secure outward flow and distribution of the
flue gases and prevents these gases from re-entering the
building through openings (windows, supply air openings
and balconies).
▶Observe the existing regulations with regard to the clear-
ances to windows and ventilation openings.
4.4 Disposing of condensate
▶When disposing of the condensate into the public waste-
water system, observe the local regulations.
▶Use only corrosion-resistant piping material for the con-
densate discharge pipe.
4.5 Clearance between combustible materials
and the components
On individually connected products, it is not necessary to
leave any clearance between the concentric air/flue pipe
and/or the corresponding extension and components made
from combustible materials.
4.6 Maximum pipe lengths
4.6.1 Maximum pipe length for horizontal wall duct
A
A Maximum pipe length

0020308120_02 Air/flue pipe installation manual 11
4.6.2 Maximum pipe length of the horizontal wall
duct with terminal set (60/100 mm diameter
only)
A
B
B
AA
B
A Maximum concentric
pipe length
B Outdoor pipe length
4.6.3 Maximum pipe length for vertical roof duct
A
A Maximum concentric
pipe length

12 Air/flue pipe installation manual 0020308120_02
4.6.4 Maximum pipe lengths, 60/100 mm diameter
Air/flue system Article num-
ber
ecoTEC plus
VU 10CS/1-5 (N-GB)
ecoTEC plus 610
VU 15CS/1-5 (N-GB)
ecoTEC plus 615
VU 20CS/1-5 (N-GB)
ecoTEC plus 620
VUW 20/26CS/1-5 (N-GB)
ecoTEC plus 826
VU 25CS/1-5 (N-GB)
ecoTEC plus 625
VUW 25/32CS/1-5 (N-GB)
ecoTEC plus 832
VU 30CS/1-5 (N-GB)
ecoTEC plus 630
VUW 30/36CS/1-5 (N-GB)
ecoTEC plus 836
VU 35CS/1-5 (N-GB)
ecoTEC plus 635
VUW 30/40CS/1-5 (N-GB)
ecoTEC plus 840
VUI 30/40CS/1-5 (N-GB)
ecoTEC plus 940
Max. concentric pipe length¹
Horizontal wall/roof duct 0020219517
0020219518
0020219519
0010035512²
0010024718
303933
16 m
plus 1 x 87° elbow
10 m
plus 1 x 87° elbow
8 m
plus 1 x 87° elbow
Variable terminal set 0020219529
0020219530
303942
303946
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 0020065937
303982
12 m 10 m 8 m
1 The inclusion of additional elbows in the flue system reduces the pipe length as follows:
–By 0.5 m for each 45° elbow
–By 1.0 m for each 87° elbow
2 Cannot be used in conjunction with the variable terminal set (VTK)
4.6.5 Maximum pipe lengths, 80/125 mm diameter
Air/flue system Article num-
ber
ecoTEC plus
VU 10CS/1-5 (N-GB) ecoTEC plus 610
VU 15CS/1-5 (N-GB) ecoTEC plus 615
VU 20CS/1-5 (N-GB) ecoTEC plus 620
VU 25CS/1-5 (N-GB) ecoTEC plus 625
VUW 25/32CS/1-5 (N-GB) ecoTEC plus 832
VU 30CS/1-5 (N-GB) ecoTEC plus 630
VUW 30/36CS/1-5 (N-GB) ecoTEC plus 836
VU 35CS/1-5 (N-GB) ecoTEC plus 635
VUW 30/40CS/1-5 (N-GB) ecoTEC plus 840
VUI 30/40CS/1-5 (N-GB) ecoTEC plus 940
VUW 20/26CS/1-5 (N-GB) ecoTEC plus 826
Max. concentric pipe length¹
Horizontal wall/roof
duct
303209
0010035777
28 m
plus 1 x 87° elbow
28 m
plus 1 x 87° elbow
Vertical roof duct 303200 30 m 30 m
External wall con-
nector
0010039735
0020042748
20 m
plus 3 x 87° elbows
20 m
plus 3 x 87° elbows
1 The inclusion of additional elbows in the flue system reduces the pipe length as follows:
–By 1.0 m for each 45° elbow
–By 2.5 m for each 87° elbow

0020308120_02 Air/flue pipe installation manual 13
5 Set-up
5.1 Installing the connector 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 connector 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 inside the flue in
certain areas can damage the flue pipework
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 end user that they must clean the terminal regu-
larly. Otherwise, due to the insects that the light may at-
tract, the terminal may become dirty.
Set-up 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
Note
The dormer is not provided by Vaillant and must
be created on-site.
▶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 system
can be installed in accordance with these instructions.
▶Secure the mounting 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 mounting template is vertical.
The mounting template indicates the position for horizontal
installation of the air/flue pipe when connecting it to the up-
per side of the boiler.

14 Air/flue pipe installation manual 0020308120_02
Condition: 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 mounting
template.
▶Calculate the required gradient in accordance with the
length of the flue pipework and then mark the position for
the wall duct.
5.2.2 Determining the clearance to the external
wall
A
A
AB
B
1a.
1b.
2.
1a. Upper flue pipe at the
rear
1b. Upper flue pipe to the
side
2. Must only be used with
the variable terminal set
(VTK)
A Clearance to the ex-
ternal wall
▶Measure the clearance (A) from outside of the wall to the
centre of the connector.
Clearance Article number
0010035512
303933
0020219517
0020219519
B 87 mm 140 mm

0020308120_02 Air/flue pipe installation manual 15
5.3 Horizontal wall/roof
duct, 60/100 mm diameter, article number
0020219517
5.3.1 Scope of delivery 0020219517
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
5.3.2 Shortening the air/flue pipe
1. Determine the clearance to the external wall.
(→Page 14)
C
13
2. Shorten the flue pipe and the air pipe by the same
amount when they are assembled.
Length Article number
0020219517
0020219519
C Clearance to external wall A
+ 75 mm
Note
Disassembling the flue pipe and the air pipe
damages the latching lugs in the terminal.
Condition: Additional extensions and elbows required
▶Install the extensions. (→Page 46)
–All of the sleeves for the flue pipe must point towards
the terminal.
▶Install the elbows (→Page 49).
5.3.3 Installing the wall duct
13
3°
1
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.
2. Slide the air/flue pipe (1) with the flexible external collar
through the wall.
3. Pull the air/flue pipe back until the external collar lies
fully on the external wall.
4. Secure the air/flue pipe with mortar and leave the mor-
tar 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)
5.3.4 Installing the roof duct
13
3°
1
▶Insert the air/flue pipe (1) without the external collar into
the dormer.
5.4 Horizontal telescopic wall/roof
duct, 60/100 mm diameter, article number
0020219518
Note
The telescopic wall/roof duct is only available in
black.

16 Air/flue pipe installation manual 0020308120_02
5.4.1 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
5.4.2 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 pipe is dam-
aged.
▶Only use the self-tapping screw provided.
4. Secure the air pipes to each other by screwing the
overlapping air pipes together using the supplied self-
tapping 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 air/flue pipe back until the external collar lies
fully on the external wall.
8. Secure the air/flue pipe with mortar and leave the mor-
tar 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)
5.4.3 Installing the roof duct
13
3°
1
336 - 578 120
▶Insert the air/flue pipe (1) without the external collar into
the dormer.
5.5 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 connector 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 pipe clamp (2) for the sliding sleeve.
7. Alternatives 1:
Condition: Wall/roof duct without extension
▶Install the sliding sleeve. (→Page 46)
7. Alternatives 2:
Condition: Wall/roof duct with extension
▶Install the extensions. (→Page 46)
▶Install the elbows (→Page 49).
▶Install the sliding sleeve. (→Page 46)
▶Connect all of the pipe joints with air pipe clamps.
(→Page 54)

0020308120_02 Air/flue pipe installation manual 17
5.6 Installing terminal sets for 60/100 mm
diameter air/flue systems
5.6.1 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 set (VTK).
If a variable terminal set is connected to horizontal flue pipe-
work, terminal clearances are reduced for the air inlet. The
terminal clearances on the "new" flue outlet at the end of
VTK remain unchanged.
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 pipework when a
variable terminal set 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.
5.6.2 Black terminal set 0020219537
5.6.2.1 Scope of delivery
321
1 Wall collar
2 Terminal piece
3 End pipe
5.6.2.2 Installing the black terminal (change of
colour)
Note
You must install the terminal sets before installing
the flue pipework.
Condition: Terminal secured using screws
▶Undo the lateral screws.
A
B
1. Detach the terminal with the flue 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
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 pipe.

18 Air/flue pipe installation manual 0020308120_02
6. Pull the opening piece from the flue 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.
9. Slide the flue pipe with the new terminal into the air
pipe until you hear the terminal click into place.
Condition: Terminal secured using screws
▶Attach the terminal using the side screws.
5.6.3 Deflector set (not for 0010035512)
5.6.3.1 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)
5.6.3.2 Installing the deflector set
Condition: Replacing the deflector set (change of colour)
▶In the event of a change of colour, replace the deflector
set, including the wall collar (→Page 17).
▶Install the deflector, instead of the end pipe, on the open-
ing piece.
Condition: 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.

0020308120_02 Air/flue pipe installation manual 19
▶Slide the deflector onto the opening piece until you hear
the deflector click into place.
5.6.3.3 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°
anti-clockwise or clockwise. These setting options
mean that the flue system can be further optimised.
5.6.4 Installing the variable terminal set (VTK)
5.6.4.1 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 set, black, article number 0020219529
–Variable terminal set, white, article number 0020219530
5.6.4.2 Installing the variable terminal set (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.
5.6.4.3 Installing extensions
1. Install the flue system 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 pipe joints are absolutely leak-tight.

20 Air/flue pipe installation manual 0020308120_02
100
80-100
2. Secure the extensions to the wall using the pipe
clamps.
–Use one pipe clamp for each extension directly
beside the sleeve.
–Upstream of each elbow, install another pipe clamp
on the extension.
43
10
13
3. Drill the fastening holes away from the centre.
5.6.4.4 Installing the end pipe
A
B
C
50 mm
1. Install the second 87° elbow into the last extension
(step A).
2. To secure the end pipe, place a 50 mm extension
piece over the end pipe (step B).
3. Insert the end pipe securely into the 87° elbow (step
C).