Preliminary Checks - Beretta Mynute J 20 C.S.I. Instrucciones De Instalacion Y Uso

TWIN OUTLETS (ø 80)
Twin outlets can be placed in the most suitable direction according to the room
requirements.
The air inlet adaptor (D) must be correctly directed, it is necessary to fasten
it with the appropriate screws, so that the positioning flap does not interfere
with the shell (fig. 11).
When necessary, the flue gas flange (L) 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 flange, selecting one from those contained
in the boiler (see the following table).
20 C.S.I.
Pipe length [m] Flue gas flange (L)
1+1
>1+1 - 4+4
>4+4 - 10+10
24-28 C.S.I. E
Flue gas flange (L)
Pipe length [m]
24 C.S.I. 28 C.S.I. E 24 C.S.I.
2+2 3+3
> 2+2 ÷ 6+6 >3+3 - 7+7
> 6+6 ÷ 16+16 >7+7 - 11+11 not installed
>11+11 - 14.5+14.5
(*) fitted in boiler
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 20-24 C.S.I. on existing sys-
tems (replacement of Ciao N/Mynute range), there is a "reduced
concentric bend" kit that allows boiler positioning while keeping
the same flue gas hole.
Flue gas flange (L)
Pipe length with
Mynute
reduced bend [m]
20 C.S.I.
up to 1.85
Ø 41
from 1.85 to 4.25
Ø 43
3.6 Filling the heating system (fig. 14)
Once the hydraulic connections have been carried out, fill the heating system.
This operation must be carried out with cold system following this instructions:
- turn by two or three turns the automatic relief valve cap (A)
- make sure the cold water inlet tap is open
- turn on the filling tap (B) until the pressure indicated by the water pressure
gauge is between 1 and 1.5 bar.
Once filling is complete, close the filling tap.
The boiler has an efficient air separator so no manual intervention is needed.
The burner switches on only if the air relief phase is finished.
3.7 Emptying the heating system
To empty the system, proceed as follow:
- switch off the boiler
- loose the boiler outlet tap (C)
- empty the lowest points of the system.
3.8 Emptying the domestic hot water
When there is risk of frost, the domestic hot water system must be emptied in
the following way:
- close the main tap of the water mains
- open all the hot and cold water taps
- empty the lowest points.
WARNING
When carrying out the discharge of the safety valve (D), it must be connected
to a suitable collection system. The manufacturer is not responsible for possible
damages due to safety valve operation.
Load losses for each
bend (m)
45°
Ø 39
0.5
Ø 41
Ø 43
Load losses for each
bend (m)
28 C.S.I. E
45°
Ø 42 Ø 43
0.5
Ø 44 (*) Ø 45
Ø 47
not installed
Load losses for
each bend (m)
Mynute
45°
24 C.S.I.
Ø 44
1
no flange
POSSIBLE OUTLET CONFIGURATIONS (fig. 13)
C12 Concentric wall outlet. Pipes can leave the boiler independently,
but the outputs must be concentric or near enough in order to
be subjected to similar wind conditions (within 50 cm).
C22 Concentric outlet in regular smoke pipe (suction and outlet in
the same pipe).
C32 Concentric roof outlet. Output as C12.
C42 Outlet and suction line in regular separate smoke pipes, but
subjected to similar wind conditions.
C52 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.
90°
C62 Outlet and suction line carried out with pipes marketed and
certified separately (1856/1).
0.8
C82 Outlet in single or regular smoke pipe and wall suction line.
4 IGNITION AND OPERATION

4.1 Preliminary checks

First ignition is carried out by competent personnel from an authorised
90°
Technical Assistance Service Beretta.
Before starting up the boiler, check:
0.8
a) that the supply networks data (electric, water, gas) corresponds to the
label data
b) that piping leaving the boiler is covered by thermal insulation sheath
c) that flue gas extraction and air suction pipes work correctly
d) that conditions for regular maintenance are guaranteed if the boiler is
air/flue gas
placed inside or between furniture
splitter
e) the seal of the fuel adduction system
f) that fuel capacity corresponds to values requested by the boiler
g) that the fuel supply system has the correct capacity for the necessary
capacity to the boiler and that it has all the safety and control devices
prescribed by current regulations.
4.2 Appliance ignition
To start-up the boiler it is necessary to carry out the following operations:
- power the boiler
- open the gas tap present in the system to allow fuel flow
- turn the mode selector (2 - fig. 1a) to the desired position:
summer mode: turning the selector to the symbol summer "
the traditional function of only domestic hot water is activated. If there is
a domestic hot water request, the boiler switches on and the boiler status
indicator LED (1) lights up with a fixed green light. The digital monitor (5)
indicates the domestic hot water temperature (fig. 4a).
winter mode: turning the mode selector to the area divided in segments
(fig. 2b) the boiler provides hot water and heating. If there is a heat re-
quest, the boiler switches on and the boiler status indicator LED (1) lights
up with a fixed green light. The digital monitor (5) indicates the heating
water temperature (fig. 3a). If there is a domestic hot water request, the
boiler switches on and the boiler status indicator LED (1) lights up with a
fixed green light. The digital monitor (5) indicates the domestic hot water
temperature (fig. 4a).
90°
Pre-heating (faster hot water): rotate the domestic hot water temperature
adjustment knob (3 - fig. 1a) to the "
1.5
one of the numbers between 1 (min. value 37°C) and 6 (max. value 60°C)
(fig. 6a) to activate the pre-heating function. This function keeps the water
in the domestic hot water exchanger hot, to reduce standby times when a
request is made. When the pre-heating function is enabled, the yellow LED
(1) in line with the "
temperature of the heating water or the domestic hot water, according to the
current request. During burner ignition following a pre-heating request, the
monitor indicates the " " symbol. To deactivate the pre-heating function,
rotate the domestic hot water temperature adjustment knob back to the
" " symbol. The yellow LED will switch off. Bring the domestic hot water
temperature adjustment knob back to the required position. This function
cannot be activated when the boiler is OFF: function selector (2 fig.1a)
on " " OFF.
Adjust the ambient thermostat to the required temperature (~20°C)
Adjustment of the heating water temperature
To adjust the heating water temperature, turn the knob with symbol "
(fig. 5a) to the area divided in segments.
Adjustment of domestic hot water temperature
To adjust domestic water temperature (bathrooms, showers, kitchen, etc.),
turn the knob with symbol "
1 (min value 37 °C) and 9 (max. value 60 °C).
On the control panel, the green led (1 - fig. 1a) flashes with frequency 0.5
second on, 3, 5 seconds off.
The boiler is standby status until, after a heat request, the burner switches
on and the indicator turns fixed green to indicate flame presence.
The boiler will be in function until the adjusted temperature is reached,
afterwards it will be in "standby" again.
If the red indicator light near the "
means the boiler is in temporary stop status (see the chapter about light signals
and faults). The digital monitor indicates the fault code detected (fig. 8a).
" symbol, then rotate it in line with
" symbol is ON. The monitor (5) indicates the delivery
" (fig. 6a): to one of the numerical values within
" symbol on the command panel lights up, this
MYNUTE J C.S.I.
" (fig. 2a)
"
5