32
Flue gas connection
We recommend the use of ATAG
comprehensive range of flue gas
components.
For further information, please see the
installation instructions:
- wall terminals
- roof terminals
- flue pipe components, both
individual pipes and concentric tubes.
Regulations about the construction
and installation of flue gas systems
are different from country to country.
It must be ensured that all national
regulations with regard to chimney
systems are observed.
Notes
The tables below give guidance on
the maximum lengths of air and flue
gas tubes that may be connected. If a
room sealed installation is being made
utilising separate air and flue
gas tubes, the lengths of both tubes
must be added together and not
exceed the relevant value given in the
tables.
The radius of any bend used in the flue
gas system must not exceed 87.5°.
Walls that are sensitive to heat
should be insulated.
Construct the flue system in such
way that no recirculation may take
place.
Installation
Connections
Air- / flue gas ducts for individual boilers
All boiler models have a parallel flue
connection.
It is not necessary to install a separate
condensate drain for the flue gas
system, since the condensate will be
flushed out via the boiler and into the
siphon. Please observe the following
recommendations:
- Only use corrosion-resistant
material
- The diameter must be calculated
and selected according to the
national regulations.
- The length of the flue gas system
must be kept as short as possible
(and must not exceed the maximum
permitted length, see the table
below)
- Horizontal flue gas tubes must have
an inclination of at least 3° back
towards the boiler.
Air supply connection
If required, a separate room sealed
air supply tube may be connected.
The diameter must be calculated in
conformity with national regulations
and in combination with the flue gas
gas system. The overall resistance
of the air supply and flue gas tubes
may not exceed the maximum supply
pressure of the Fan at any time. (Also
see the Chapter “Technical data” and
the table below)
Dimensioning (reference value)
Required minimum (flue enclosure) shaft cross-section
Diameter flue duct
Square shafts
Round shafts
100 mm
140 x 140 mm
160 mm
Ø tubes (open or parallel tubes
room sealed installation)
Maximum length in metres
Changes of direction
0
2
3
4
XL75F
Ø100 mm
60
56
54
52
XL105F
34
30
28
26
XL125F
20
16
14
12
XL150F
16
12
10
8
XL180F
Ø130 mm
35
30
27
25
XL210F
30
25
22
20
Ø tubes (concentric room sealed
installations)
Maximum length in metres
Changes of direction
0
2
3
4
XL75F
Ø100/150 mm
13
9
7
8
XL105F
10
6
9
6
XL125F
8
6
3
2
XL150F
9
6
5
3
