21
pic. 14 B
KIT 0SDOPPIA06
AIR INTAKE
TERMINAL WITH
ANTI-PULSE DEVICE
+
GRILLE
AIR INTAKE STUB
PIPE
AIR DEFLECTOR
AIR DIAPHRAGM
Ø 51 MM
NOT to be installed
on this model
FLUE GAS
DISCHARGE STUB
PIPE
For installations with separate air intake and flue gas discharge ducts the split base kit (purchase code: 0SDOPPIA06) must be employed.
The kit consisting of the following components (pic. 14b):
- 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 according to what is further specified for the air intake terminal;
- fixing screws and seals.
RTFS 28 and CTFS 28
WARNING
In case when a non-original split base kit is installed, the boiler will not be working properly.
Air intake
Minimum lenght of the air intake pipe is 1 mter.
Each wide radius 90° bend (R=D) installed on the air intake duct is equal to 1 m linear length.
Each narrow radius 90° bend (R<D) installed on the air intake duct is equal to 1.5 m linear length.
Load loss of the air intake terminal is not to be taken into consideration.
Air intake terminal provided with the anti-pulse device contained in the split base kit
must be installed without the Ø 51 mm air
diaphragm.
The standard air deflector MUST be installed.
Flue gas system
Each wide radius 90° bend (R=D) installed on the flue duct is equal to 2 m linear length.
Each narrow radius 90° bend (R<D) installed on the flue duct is equal to 4 m linear length.
IMPORTANT
Flue pressure switch intervention
A flue pressure switch is fitted to the boiler. It operates proper flue gas discharge flow
verification.
Should flue gas discharge and/or air intake system malfunction, the device shuts
down the boiler to prevent unsafe operation (see paragraph 1.2.4.3).
Pipe length (m)
Flue gas discharge
diaphragm
1 < L < 5*
Ø 47
2 < L < 10.5*
Ø 49
10.5 < L < 21.5*
No diaphragm
* with the exception of the starting elbow
