Dimensioning Of The Flue Gas And Air Intake Duct - Atag A200SOV Instructions For Use And Installation

6.5.1 Dimensioning of the flue gas and air intake duct

Example:
An A200SOV with
a concentric flue gas system
ø80/125mm has according
to the table a maximum flue
straight length of 30m In the
system that is going to be put
in there are 2 x 45° bends, so
the maximum flue gas length
is
30 – ( 2 x -1,1 ) = 27,8
meters.
When using a
concentric flue system
ø60/100mm with a
maximum length
between 4 and 15
meters a correction
must be made to the
fan speed by adjusting
Parameter 683
according to the table.
Fill out the correction
factor on the sticker
below the control
panel.
See chapter 'Settings'
how to adjust a
parameter setting.
The flue diameter is determined by the total length of the run, including for the connection
pipe, elbows fittings and terminal covers etc and the type and number of boilers installed
into the system.
An undersized flue pipe can lead to disorders. Look at table 1 for the choice of the
system and the correct diameter. The table below shows the maximum flue lengths with
the different boiler outputs. A longer flue gas length can be achieved by increasing the
diameter to ø 100mm.
Explanation table 1:
Two pipe flue gas system: maximum noted length = distance between boiler and
terminal A
Concentric flue gas system: maximum noted length = distance between boiler and
terminal B
When using bends the noted value behind every bend should be deducted from the
maximum straight length.
Two pipe flue system + chimney lining ø80
ø80mm
Maximum straight length 80
A200SOV
87° bend resistance length
45° bend resistance length
Concentric flue system ø80/125mm
ø80/125mm
Maximum straight length 80/125
A200SOV
87° bend resistance length
45° bend resistance length
Concentric flue system ø60/100mm
ø60/100mm
Maximum straight length 60/100
A200SOV
87° bend resistance length
45° bend resistance length
Dimensions flue gas system and air supply system
NOTE! ADJUSTED PARAMETER SETTING FOR FAN SPEED
- See Installation instructions for more details -
Correction factor fan speed (parameter 683)
Adjusted by ..........................................................................
Date ..........................................................................
Example correction factor sticker
A
in m
35,5
-1,5
-0,8
B
in m
30
-2,8
-1,1
B Correction factor fan speed
in m See chapter 'Settings'
15 Correction factor 15 meter
-1,6 Correction factor 12 meter
-1 Correction factor 10 meter
Correction factor 8 meter
Correction factor 6 meter
Correction factor 4 meter
......................
Par.
683
6
4
3
2
1
0
Table 5
17