17
BTFS 28
Flue gas discharge
The load loss of each 90° wide radius (R=D)
flue gas
elbow
is equivalent to a 2 meter long pipe.
The load loss of each 90° narrow radius
flue gas
elbow is
equivalent to a 4 meter long pipe.
Flue gas discharge pipe must be at least 0.5 meter long.
Install the air intake anti-pulse terminal included in the split
pipe standard kit which contains a Ø 51 air intake diaphragm
and install the standard air intake deflector (pic. 8).
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
0.5 < L < 9.5
Ø 49
9.5 < L < 15.5
No diaphragm required
BTFS 32
Flue gas discharge
The load loss of each 90° wide radius (R=D)
flue gas
elbow
is equivalent to a 2 meter long pipe.
The load loss of each 90° narrow radius
flue gas
elbow is
equivalent to a 5 meter long pipe.
Flue gas discharge pipe must be at least 0.5 meter long.
Install the air-intake anti-pulse terminal included in the
split pipe standard kit and install the standard air intake
deflector (pic. 8).
Do NOT install the Ø 51 air-intake diaphragm.
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
0.5 < L < 5.5
Ø 51
5.5 < L < 10.5
No diaphragm required
WARNING:
Flue gas pressure switch intervention
Should the air/flue gas system malfunction, the safety devi-
ce shuts down the boiler( see 1.2.3.3 paragraph)
It is absolutely forbidden to tamper with and/or exclude
the safety device.
If the boiler shuts down frequently, check the flue gas sy-
stem. The pipes may be obstructed or unsuitable for the
discharge of flue gas into the atmosphere.
The Manufacturer shall not be held responsible for
damage resulting in incorrect installation, use, modi-
fication of the boiler or for non-observance of the in-
structions provided by the manufacturer or applicable
installation standards for the product.
3.2.11. Installation examples
Ø 80 mm air/flue gas system configuration
No. 1 example
Air intake and flue gas pipe terminals facing each other
from two opposite external walls.
No. 2 example
Air intake from external wall and roof flue gas dischar-
ge.
450
750
96
120
535
376
316
pic. 9
Dimensions for connection to air/flue gas split pipe
system
≥ 500
NO. 1 EXAMPLE
H min. = 150 mm
NO. 2 EXAMPLE
pic. 10
Split pipe system example
