Beretta Mynute Green E 25 C.S.I. Installer And User Manual page 6

ENGLISH
3.8 Gas connection
Before connecting the appliance to the gas network, check that:
- current prevailing standards have been met
- the gas type is appropriate for the appliance
- the piping is clean.
The gas pipe must be installed outdoors. If the pipe has to pass
through the wall, it must pass through the central opening in the low-
er part of the template.
It is advisable to install a filter of suitable dimensions on the gas line
if the distribution network contains solid particles.
Once the appliance has been installed, check the connections are
sealed according to current installation regulations.
3.9 Flue gas exhaustion and air aspiration (fig. 10)
For flue gas discharge, refer to Standards UNI-CIG 7129-7131 and
UNI 11071. Always comply with local standards of the Fire Depart-
ment, the Gas Company and with possible municipal dispositions.
The discharge of flue gas is guaranteed by the centrifugal fan located
inside the combustion chamber. The boiler is supplied without the
flue gas outlet/air suction kit, since it is possible to use the accesso-
ries for appliance with a forced draught sealed chamber that better
adapts to the installation characteristics.
It is essential for evacuating fumes and restoring boiler combustion
air that only original Riello pipes be used and that the connection is
made correctly as shown in the instructions provided with the flue
gas accessories.
A single smoke pipe can be connected to several appliances provid-
ed that every appliance is the condensing type
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.
As envisaged by Standard UNI 11071, the boiler is designed to take
in and dispose of flue gas condensate and/or meteoric water conden-
sate 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.
if a condensate relaunch pump is installed, check the technical
data (provided by the manufacturer) regarding output, to en-
sure it operates correctly.
POSSIBLE OUTLET CONFIGURATIONS (fig. 11)
B23P-B53P - Suction in room, with external outlet.
C13-C13x - Concentric wall outlet. Pipes can leave the boiler inde-
pendently, but the outputs must be concentric or near enough in or-
der to be subjected to similar wind conditions (within 50 cm).
C23 - Concentric outlet in regular smoke pipe (suction and outlet in
the same pipe).
C33-C33x - Concentric roof outlet. Output as C13.
C43-C43x - Discharge and suction in common, separate smoke
pipes, but subjected to similar wind conditions.
C53-C53x - Separate wall or roof outlet and suction line and in areas
with different pressures. Outlet and suction line must never be placed
on opposite walls.
C63-C63x - Outlet and suction line carried out with pipes marketed
and certified separately (1856/1).
C83-C83x - Outlet in single or regular smoke pipe and wall suction
line.
C93-C93x - Discharge on the roof (similar to C33) and air suction
from a single existing smoke pipe.
See the prevailing standards.
6
"FORCED OPEN" INSTALLATION (TYPE B23P/B53P)
Flue gas discharge pipe ø 80 mm (fig. 12)
The flue gas outlet pipe can be directed to the most suitable direction
according to installation requirements. For installation, follow the in-
structions supplied with the kit.
In this configuration, the boiler is connected to the flue gas outlet pipe
of ø 80 mm through an adaptor of ø 60-80 mm.
In this case, the combustion air is picked up from the boiler
installation room (which must be a suitable technical room with
proper ventilation).
The non insulated flue gas 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 in-
stallation and the length of the pipe.
Maximum length of the flue gas
discharge pipe Ø 80 mm
25 C.S.I. 80 m
30 C.S.I. 80 m
"AIRTIGHT" 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 operated without them.
Concentric pipes (Ø 60-100 mm) (Fig. 13)
The concentric pipes can be fitted in most suitable direction in rela-
tion to installation requirements complying with the maximum lengths
show on 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 in-
stallation 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
Max straight length of concentric
pipe Ø 60-100 mm
25 C.S.I. 7.85 m
30 C.S.I. 7.85 m
Vertical
Max straight length of concentric
pipe Ø 60-100 mm
25 C.S.I. 8.85 m
30 C.S.I. 8.85 m
"Straight length" means without bends, drainage terminals or
joints.
Concentric pipes (Ø 80-125 mm) (Fig. 14)
For this configuration the specific adaptor kit must be installed. The
concentric pipes can be fitted in most suitable direction in relation
to installation requirements. For installation, follow the instructions
supplied with the specific kits for condensing boilers.
Maximum straight length of
concentric pipe Ø 80-125 mm
25 C.S.I. 14.85 m
30 C.S.I. 14.85 m
"Straight length" means without bends, drainage terminals or
joints.
Pressure loss
45° curve 90° curve
1 m 1.5 m
Pressure loss
45° curve 90° curve
1.3 m 1.6 m
Pressure loss
45° curve 90° curve
1.3 m 1.6 m
Pressure loss
45° curve 90° curve
1 m 1.5 m