Beretta QUADRA GREEN 25 R.S.I. Manual De Instalacion Y Uso página 21

3.11 Flue gas discharge and air suction
Observe local legislation regarding flue gas discharge.
Flue gases are discharged from a centrifugal fan located inside the combus-
tion chamber and the control board constantly checks that this is working
correctly. The boiler is supplied without the flue gas discharge/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 extraction and the restoration of boiler combustion air, it is essen-
tial to only use certified piping. Connection must be carried out correctly as in-
dicated in the instructions supplied as standard with the flue gas accessories.
Multiple appliances can be connected to a single smoke pipe provided that
each is a sealed chamber-type appliance. The boiler is a Type C appliance
(sealed 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.
The maximum lengths of the ducts refer to flue systems available in
the catalogue.
Straight length means comprehensive of the first curve (connection
in the boiler), terminals and junctions. An exception is made for the
vertical Ø 60-100 mm concentric pipe, whose straight length does
not include curves.
POSSIBLE OUTLET CONFIGURATIONS (fig. 23)
B23P/B53P Suction indoors and discharge outdoors
C13-C13x Discharge via concentric wall outlet. The pipes may leave the
boiler independently, but the outlets must be concentric or sufficiently close
together to be subjected to similar wind conditions (within 50 cm)
C33-C33x Discharge via concentric roof outlet. Outlets as for C13
C43-C43x Discharge and suction in common separate smoke pipes, but
subjected to similar wind conditions
C53-C53x Separate discharge and suction lines on wall or roof and in areas
with different pressures. The discharge and suction lines must never be
positioned on opposite walls
C63-C63x Discharge and suction lines using pipes marketed and certified
separately (1856/1)
C83-C83x Discharge via single or common smoke pipe and wall suction line
C93-C93x Discharge on roof (similar to C33) and air suction from a single
existing smoke pipe
"FORCED OPEN" INSTALLATION (TYPE B23P/B53P)
Flue gas discharge pipe ø 80 mm (fig. 20)
The flue gas discharge pipe can be directed to the most suitable direction
according to installation requirements. For installation, follow the instruc-
tions supplied with the kit. In this configuration, the boiler is connected to
the flue gas discharge pipe (ø 80 mm) through an adaptor (ø 60-80 mm).
In this case, the combustion air is picked up from the boiler instal-
lation room (which must be a suitable technical room with proper
ventilation).
Uninsulated flue discharge outlet pipes are potential sources of danger.
Arrange the flue gas discharge pipe so it slopes by 3° towards the boiler.
The boiler automatically adapts the purging to the type of installation
and the length of the pipe.
maximum length of the flue gas
discharge pipe ø 80 mm
70 m
"SEALED" INSTALLATION (TYPE C)
The boiler must be connected to concentric or twin flue gas discharge pipes
and air suction pipes, both leading outdoors. The boiler must not be oper-
ated without them.
Concentric pipes (ø 60-100 mm) (fig.21)
The concentric pipes can be placed in the most suitable direction according
to installation requirements, complying with the maximum lengths indicated
in the table.
Arrange the flue gas discharge pipe so it slopes by 3° towards the
boiler.
Non-insulated outlet pipes are potential sources of danger.
The boiler automatically adapts the purging to the type of installation
and the length of the pipe.
Do not obstruct or choke the combustion air suction pipe in any way.
For installation, follow the instructions supplied with the kit.
Horizontal
straight length
concentric pipe ø 60-100 mm
5,85 m
pressure drop
45° bend 90° bend
1,0 m 1,5 m
pressure drop
45° bend 90° bend
1,3 m 1,6 m
Vertical
straight length
concentric pipe ø 60-100 mm
6,85 m
Concentric pipes (ø 80-125)
For this configuration, the special adaptor kit must be fitted. The concentric
pipes can face in the direction most suitable for installation requirements.
For installation, follow the instructions supplied with the specific condensing
boilers kits.
straight length
concentric pipe ø 80-125 mm
15,3 m
Twin pipes (ø 80 mm) (fig. 22)
The twin pipes can face in the direction most suited to the installation re-
quirements. For installation, follow the instructions supplied with the spe-
cific accessory kit for condensing boilers.
To use the combustion air suction pipe, one of the two inlets (A and B) must
be selected. Remove the closure plug which is fixed using screws, and use
the specific adaptor relating to the inlet selected (C air inlet adaptor ø 80 - D
air inlet adaptor from ø 60 to ø 80) available as an accessory.
Arrange the flue gas discharge pipe so it slopes by 3° towards the
boiler.
The boiler automatically adapts the purging to the type of installation and
the length of the pipes. Do not obstruct or choke the pipes in any way.
Refer to the graphs to find the maximum lengths of the single pipe.
The use of longer pipes reduces the boiler output.
maximum straight length
twin pipes ø 80 mm
45+45 m
MAXIMUM STRAIGHT LENGTH Ø 80
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
0 5 10 15 20 25 30 35
Suction pipe length (m)
Twin pipes ø 80 with ducting Ø50 - Ø60 - Ø80 (fig. 24)
Thanks to the boiler characteristics, a flue gas discharge pipe ø 80 can
be connected to the ducting ranges Ø50 - Ø60 - Ø80.
For the ducting, you are advised to make a project calculation in
order to respect the relevant standards in force.
The table shows the standard configurations allowed.
Table of standard pipe configurations (*)
1 bend 90° ø 80
Air suction
4,5m pipe ø 80
1 bend 90° ø 80
4,5m pipe ø 80
Flue gas discharge Reduction from ø 80 to ø50, from ø 80 to ø 60
stack base bend 90°, ø 50 or ø 60 or ø 80
For ducting pipe lengths see table
(*) Use flue gas system accessories in plastic (PP) for condensing boilers:
Ø50 and Ø80 H1 class and Ø60 P1 class.
pressure drop
45° bend
1,3 m
pressure drop
45° bend
1,0 m
pressure drop
45° bend
1,0 m
40 45 50 55 60 65 70 75 80 85 90
ENGLISH
90° bend
1,6 m
90° bend
1,5 m
90° bend
1,5 m
95 100 105 110
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