Installation & Servicing instructions ATAG iC-Range
28
Example:
An i28C with a
concentric flue gas system
ø60/100mm has according
to the table a maximum flue
straight length of 15m In the
system that is going to be put
in there are 2 x 45° bends, so
the maximum flue gas length
is 15 – ( 2 x -1.3 ) = 12.4m.
L
9.8.2 Dimensioning of the flue gas and air intake duct
The total length of the run of the flue is determined by the flue diameter, including for the connection pipe,
elbows fittings and terminal covers etc..
An incorrect dimensioned flue system can lead to disorders. Look at table 9.8.2.a for the choice of the boiler
and the corresponding maximum equivalent flue length.
Explanation table 9.8.2.a:
Concentric flue gas system:
maximum noted length L = distance between boiler (from elbow or vertical adapter) and the end of terminal
When using bends the noted value behind every bend should be deducted from the maximum straight
length. See example.
Flue dimensions
Rear Flue
B (mm)
Min
Max
Telescopic flue (FA100105)
280
430
Side Flue
B + C (mm)
Min
Max
Telescopic flue (FA100105)
285
435
Dimensions flue gas system and air supply system
Concentric flue system ø60/100 (Horizontal & Vertical)
Type
i24C
i24C
iC Economiser 27 Plus
i36C
i40C
iC Economiser 35 Plus
iC Economiser 39 Plus
Maximum equivalent length (L)
m
15
9
8
45° bend resistance length
m
-1.3
-1.3
-1.3
87° bend resistance length
m
-1.9
-1.9
-1.9
Concentric flue system ø80/125 (Horizontal & Vertical)
Type
i24C
i28C
iC Economiser 27 Plus
i36C
i40C
iC Economiser 35 Plus
iC Economiser 39 Plus
Maximum equivalent length (L)
m
50
45
40
45° bend resistance length
m
-1.9
-1.9
-1.9
87° bend resistance length
m
-3.0
-3.0
-3.0
Tabel 9.8.2.a