24
3 10 Evacuation of combustion
products and air suction
For flue gas discharge, refer to Standards UNI-CIG 7129-
7131 and UNI 11071. Always comply with local standards
of the Fire Department, the Gas Company and with possi-
ble municipal dispositions.
The discharge of flue gas is guaranteed by the centrifugal
fan fitted in the boiler.
The boiler is supplied without the flue gas outlet/air suction
kit, since it is possible to use the accessories for appliance
with a forced draught sealed chamber that better adapts to
the installation characteristics.
For flue gas discharge and the restoration of boiler com-
bustion air, it is essential to use only our original, specific
pipes for condensation boilers, and to ensure that the con-
nection is made correctly (as indicated in the instructions
supplied with the flue gas accessories).
The boiler is a C-type appliance (with airtight chamber),
and must therefore have a safe connection to the flue gas
discharge pipe and to the combustion air suction pipe;
these both carry their contents outside, and are essential
for the operation of the appliance.
Both concentric and twin terminals are available.
MAIN OUTLET CONFIGURATIONS
B
A
B23P
B53P
Fig. 20
A
rear outlet
B
max 50 cm
b
As envisaged by Standard UNI 11071, the boiler is
designed to take in and dispose of flue gas conden-
sate and/or meteoric water condensate deriving from
the flue gas discharge system. It does this via its own
drain-tap, if an external drain-tap is not fitted during
the design or installation phase.
b
if a condensate relaunch pump is installed, check
the technical data (provided by the manufacturer) re-
garding output, to ensure it operates correctly.
b
Do not convey the flue gases from multiple boilers
into the same discharge pipe; each must have its
own independent pipe. If the discharge pipe needs
to be extended beyond 4 metres, it is recommend-
ed to install a siphon at the base of the vertical tract,
as shown in the figure on chapter Preparation for the
condensate drain.
3 10 1 "Forced open" installation (type B23P-
B53P)
Flue gas discharge pipe ø 80mm
Fig. 21
To arrange this configuration, you must use the specific
connection point supplied as an accessory.
b
In this case, the combustion air is picked up from
the boiler installation room (which must be a suitable
technical room with proper ventilation).
b
The non insulated flue gas outlet pipes are potential
sources of danger.
b
Make sure the flue gas discharge pipe is tilted 3° to-
wards the boiler.
Follow the instructions provided in the flue pipe kit to install
the flues.
Description
Maximum length
of the flue gas
discharge pipe ø
80mm
Pressure drop
45°
bend
90°
bend
VERVE i 50
50 m
1 m
3 m
3 10 2 "Airtight" installation (type C)
The boiler must be connected to concentric or twin flue gas
discharge pipes and air suction pipes, both leading out-
doors. The boiler must not be operated without them.
