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3.2.6.2.2. Air intake and flue gas discharge system via 100/60 mm coaxial pipes
Type C12
Minimum permissible length of horizontal coaxial pipes is 1 meter, not counting the very first elbow connected to the boiler. Maximum
permissible length of horizontal coaxial pipes is 4 meter, not counting the first elbow connected to the boiler.
For each additional elbow maximum permissible length must be reduced by 1 meter. In addition to that, the duct is to have a 1%
slope toward the exit direction, in order to prevent rainwater entering it.
Choosing the applicable diaphragm supplied with the boiler (pic. 10)
Pipe length (m)
Flue gas discharge diaphragm diameter (mm)
1 ≤ L ≤ 2*
Ø
42,5
2 ≤ L ≤ 4*
No diaphragm
* the first elbow from the boiler is not to be accounted for
Pipe length (m)
Flue gas discharge diaphragm diameter (mm)
1 ≤ L ≤ 2
Ø
42,5
2 ≤ L ≤ 4
No diaphragm
Type C32
Minimum permissible length for vertical coaxial pipes is 1 meter, equal to the length of the chimney.
Maximum permissible length for vertical coaxial pipes is 4 meter, including the chimney.
For each additional elbow the maximum permissible length must be reduced by 1 meter.
Choosing the applicable diaphragm supplied with the boiler (pic. 10)
The above data are referred to air intake/flue gas exhaust systems which are implemented by means of smooth, rigid
manufacturer approved and supplied pipes.
Pic. 10 - Air intake/flue gas exhaust coaxial pipe system (CTFS)
Pic. 11 - Dimensions for connection to the air intake/flue gas
exhaust coaxial pipe system (CTFS)
SEAL
NEO
GAS
