Vaillant ecoTEC plus VU Series Installation Manual page 10

4 System conditions
4.1 Technical properties of the air/flue systems
from Vaillant for condensing products
Technical feature
Temperature resistance
Leak-tightness
Condensate resistance
Corrosion resistance
Clearance from combustible
materials
Installation site
Resistance to fire
Fire resistance duration
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.
10
Description
Adapted to the maximum
flue gas temperature of the
product.
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.
For gas and oil fuels
Adapted to the gas and oil
condensing boiler
–
Concentric air/flue pipe-
work: No clearance re-
quired
In accordance with the install-
ation instructions
Normal level of flame resist-
ance (in accordance with EN
13501-1 Class E)
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.
4.3 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 Maximum pipe length
Air/flue pipe installation manual 0020308120_02
A