Beretta Mynute S 24 C.S.I. Manuel D'installation Et D'utilisation page 6

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To direct the outlets in the most suit-
able installation way (right air input)
there is an air/flue gas splitter kit
available.
reduced concentric bend kit
If it is necessary to install
Mynute S on existing
systems (replacement
of Ciao N/Mynute range),
there is a "reduced con-
centric bend" kit that
allows boiler positioning
while keeping the same
fl ue gas hole.
Flue gas fl ange (F)
Pipe length with
Mynute S
reduced bend [m]
20 C.S.I.
up to 1.85
Ø 41
from 1.85 to 4.25
Ø 43
TWIN OUTLETS (ø 80) (fi g. 11)
Twin outlets can be placed in the most suitable direction according
to the room requirements.
The air inlet adaptor must be correctly oriented, it is therefore
necessary to fi x it using the appropriate screws, so that the
locating tab does not interfere with the casing.
When necessary, the fl ue gas fl ange (F) must be removed using
a screwdriver as a lever. The table indicates the permitted linear
lengths. According to the length of the pipes used, it is necessary
to insert a fl ange, selecting one from those contained in the boiler
(see the following table).
Pipe length
ø 80 [m]
up to 3,5+3,5
from 3,5+3,5 to 9,5+9,5
from 9,5+9,5 to 14+14
from 14+14 to 20+20
28 C.S.I. - 28 R.S.I.
Pipe length
ø 80 [m]
up to 1+1
from 1+1 to 5+5
from 5+5 to 8+8
from 8+8 to 14,5+14,5
35 C.S.I. - 35 R.S.I.
Pipe length
ø 80 [m]
up to 4+4
from 4+4 to 8+8
(**) fi tted in boiler
6
air/fl ue gas
Load losses for
each bend (m)
Mynute S
45°
24 C.S.I.
Ø 44
1
no fl ange
24 C.S.I.
Load losses for each
Flue gas
bend (m)
fl ange (F)
45°
Ø 42
Ø 44 (**)
1,2
Ø 46
not installed
Load losses for each
Flue gas
bend (m)
fl ange (F)
45°
Ø 41
Ø 43 (**)
1,2
Ø 45
not installed
Load losses for each
Flue gas
bend (m)
fl ange (F)
45°
Ø 49 (**)
1,2
not installed
B22P/B52P Suction indoors and discharge outdoors
C12-C12x Discharge via concentric wall outlet. The pipes may leave the
boiler independently, but the outlets must be concentric or suffi ciently
close together to be subjected to similar wind conditions (within 50 cm)
splitter
C22 Discharge via concentric outlet in common smoke pipe (suction and
discharge in the same pipe)
C32-C32x Discharge via concentric roof outlet. Outlets as for C12
C42-C42x Discharge and suction in common separate smoke pipes, but
subjected to similar wind conditions
C52-C52x Separate discharge and suction lines on wall or roof and in ar-
eas with different pressures. The discharge and suction lines must never
be positioned on opposite walls
C62-C62x Discharge and suction lines using pipes marketed and certifi ed
separately (1856/1)
C82-C82x Discharge via
single or common smoke
pipe and wall suction line
C92-C92x Discharge on
roof (similar to C32) and
air suction from a single
existing smoke pipe
90°
1.5
3.5 Fumes exhaustion and air suction (Mynute S C.A.I. E)
Observe applicable legislation regarding fl ue gas exhaustion.
The exhaust system must be made using rigid ducting, the joints
between elements must be hermetically sealed and all compo-
nents must be resistant to heat, condensation and mechanical
stress and vibration.
Non insulated outlet pipes are potential sources of danger.
The apertures for the combustion air must be realised in compli-
ance with applicable legislation. If condensation forms, the exhaust
duct must be insulated.
Figure 12 shows a top-down view of the boiler with the dimensions
for the fl ue gas exhaust outlet.
Flue gas safety system
The boiler features a system monitoring that fl ue gases are cor-
rectly exhausted which arrests the boiler in the event of a fault:
fl ue gas thermostat, fi g. 11b. To restore normal operation, turn the
function selector to
function selector into the desired position.
90°
If the fault persists, call a qualifi ed technical from the Technical
Support Service. The fl ue gas exhaustion monitoring system must
never be bypassed or rendered inoperable. Use only original re-
1,7
placement parts when replacing the whole system or faulty system
components.
3.6 Filling the heating system (fi g. 13)
Once the hydraulic connections have been carried out, fi ll the heat-
ing system. This operation must be carried out with cold system
following this instructions:
- turn by two or three turns the automatic relief valve cap (I)
90°
- make sure the cold water inlet tap is open
- turn on the fi lling tap (L fi g. 13 for C.A.I. - C.S.I. - external for
R.S.I.) until the pressure indicated by the water pressure gauge
is between 1 and 1.5 bar.
1,7
Once fi lling is complete, close the fi lling tap.
The boiler has an effi cient air separator so no manual intervention
is needed. The burner switches on only if the air relief phase is
fi nished.
3.7 Emptying the heating system
To empty the system, proceed as follow:
90°
- switch off the boiler
- loose the boiler outlet tap (M)
1,7
- empty the lowest points of the system.
3.8 Emptying the domestic hot water (only for C.A.I. - C.S.I.
model)
When there is risk of frost, the domestic hot water system must be
emptied in the following way:
(3 fi g.1a), wait a few seconds, then turn the

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