26
3.2.7.3. 80 mm diameter split pipe air/flue
system
Installation types С12-С32-С42-С52-С82
RTFS 24 and CTFS 24
For installations with separate air intake and
flue gas discharge pipes the split base kit (code
0SDOPPIA03) must be used. The kit consists of the
following components (pic. 15):
• no. 1 Ø 80 mm female stub pipe with flange for
connection to the flue gas discharge pipe (flue gas
deflector included);
• no. 1 Ø 80 mm female stub pipe with flange for
connection to the air intake pipe;
• no. 1 standard air deflector;
• fixing screws and seals.
The boiler may not work properly if a non-original split base kit is installed.
Air intake
The minimum length of the air intake pipe is 1 metre.
Each wide-radius 90° elbow (R=D) installed on the air intake pipe is equal to 1 m linear length.
Each narrow-radius 90° elbow (R<D) installed on the air intake pipe is equal to 1.5 m linear length.
The load loss of the air intake terminal is not to be taken into consideration.
A standard air deflector MUST be installed.
Flue gas system
Each wide-radius 90° elbow (R=D) installed on the flue pipe is equal to 1.5 m linear length.
Each narrow-radius 90° elbow (R<D) installed on the flue pipe is equal to 3.5 m linear length.
A flue pressure switch is fitted to the boiler. It controls the flue
gas discharge flow rate.
If the flue gas discharge and/or air intake system malfunctions, the
device shuts down the boiler to prevent unsafe operation (see
subsection 1.3.3).
Pipe length (m)
Flue gas discharge
diaphragm (mm)
L < 2
Ø 45
2 < L < 17
Ø 49
17 < L < 33
-
AIR DEFLECTOR
FLUE GAS
DISCHARGE
STUB PIPE
pic. 15 - Split kit 0SSDOPPIA03
(CTFS 24 and RTFS 24)
AIR INTAKE STUB
PIPE
RTFS 28 and CTFS 28
For installations with separate air intake and flue gas discharge pipes, the split base kit (code 0SDOPPIA06) must be used. The kit consists
of the following components (pic. 16):
• no. 1 Ø 80 mm female stub pipe with flange for connection to the flue gas discharge pipe;
• no. 1 Ø 80 mm female stub pipe with flange for connection to the air intake pipe;
• no. 1 standard air deflector;
• air intake terminal provided with grille and anti-pulse device;
• no. 1 Ø 51 air diaphragm to be used for the air intake terminal sin accordance with the specifications given below;
• fixing screws and seals.
pic. 16 - Split kit 0SSDOPPIA06 (CTFS 28 and RTFS 28)
AIR INTAKE
TERMINAL WITH
ANTI-PULSE
GRILLE
AIR INTAKE
STUB PIPE
AIR DEFLECTOR
AIR DIAPHRAGM
Ø 51 MM
NOT to be installed on
this model
FLUE GAS DISCHARGE
STUB PIPE
