15
3.2.8. Air/flue gas system with 100/60 mm diame-
ter coaxial pipes
C12 - C32 - C42 installation type
BTFS 24
Minimum acceptable length of pipes is 0.5 meters and one
elbow. Maximum acceptable length of pipes is 4 meters
and one elbow.
In presence of additional elbows, maximum acceptable len-
gth must be reduced by 1 meter for each elbow installed.
Choosing the applicable diaphragm supplied with the
boiler
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
0.5 < L < 1
Ø 40
1 < L < 3
Ø 45
3 < L < 4
No diaphragm required
BTFS 28
Minimum acceptable length of pipes is 0.5 meters and one
elbow. Maximum acceptable length of pipes is 4 meters
and one elbow.
In presence of additional elbows, maximum acceptable len-
gth must be reduced by 1 meter for each elbow installed.
Choosing the applicable diaphragm supplied with the
boiler
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
0.5 < L < 3
Ø 42
3 < L < 4
Ø 45
BTFS 32
Minimum acceptable length of pipes is 0.5 meters and one
elbow. Maximum acceptable length of pipes is 4 meters
and one elbow.
In presence of additional elbows, maximum acceptable len-
gth must be reduced by 1 meter for each elbow installed.
Choosing the applicable diaphragm supplied with the
boiler
Pipe length (m.)
Flue gas discharge
diaphragm diameter (mm)
0.5 < L < 1
Ø 45
1 < L < 2
Ø 47
2 < L < 3
Ø 49
3 < L < 4
No diaphragm required
97
750
450
376
535
100
pic. 7
Dimensions for connection to coaxial air/flue
gas system
pic. 6
DIAPHRAGM
SEALING
CAP
NEOPRENE
GASKET
SEALING
CAP
FROM 0.5 UP TO 4 METERS
3.2.9. Air/flue gas system with 80 mm diameter
split pipes
C12 – C 32 – C42 – C52 – C82 installation types
When installing a split pipe air/flue gas system, employ split
pipe standard kit (code 0SDOPPIA06) which is includes the
following components (pic. 8):
- one Ø 80 mm flanged female pipe for connection to flue
gas discharge pipe
- one Ø 80 mm flanged female pipe for connection to air
intake pipe
- one standard air intake deflector
- one air intake terminal equipped with grille and anti-pulse
device
- one Ø 51 air intake diaphragm to be used according to
the instructions in the following “air intake terminal” sec-
tion
- fixing screws and sealing gaskets.
WARNING
Should the split pipe standard kit provided by the manu-
facturer not be installed, boiler operation will not be ap-
propriate.
