24
3.6.1 - Installation on collective flues
in positive pressure
The collective flue is a smoke exhaust system su
-
itable for collecting and expelling the combustion
products of multiple appliances installed on multiple
floors of a building.
Positive pressure collective flues can only be used
for type C condensing appliances. Consequently, the
B53P / B23P configuration is prohibited.
The installation of boilers on pressurized collective
flues is permitted exclusively to
G20.
The boiler is sized to function correctly up to a ma-
ximum internal pressure of the flue not exceeding
25 Pa.
Make sure that the air intake and combustion product
exhaust ducts are watertight.
C(10) 3 x
C(10) 3
Slope towards the entrance = 3%
Lmin-Lmax
(Minimum and maximum LENGTH at the flue entrance)
COAXIAL Ø60/100
DOUBLE Ø80
FROM [m]
TO [m]
FROM [m]
TO [m]
-
-
0,5+0,5
4,5+4,5
COAXIAL Ø80/125
FROM [m]
TO [m]
0,5
4,5
Horizontal exhaust and intake terminals directed externally via coaxial or split type ducts.
aria
comburente
Lmin - max
prodotti della
combustione
Lmin - max
Lmin - max
Note:
for use in configuration
C (10)
with optional clapét
(only for G20 methane).
It is possible to install the appliance in configu
-
ration
C (10)
only with the optional accessory.
“clapét” provided by Unical.
Use of clapét as an accessory and requires a
dedicated set of parameters to compensate the
pressure drop introduced.
Note: Parameters are released by
after-sales service upon request of
installer / reserved technical area site.
combustion air
combustion
products
