Beretta MYNUTE GREEN 28 C.S.I. Manual De Instalacion Y Uso página 7

Suggestions for correctly venting the air from the heating cir-
cuit and the boiler
When installing the boiler or when carrying out extraordinary main-
tenance operations, proceed as follows:
1. Use a CH11 wrench to open the manual breather valve located
over the air distribution box (fig. 11): connect the hose supplied
with the boiler to the valve in order to discharge the water into
an external container.
2. Open the manual filling tap on the hydraulic assembly and
wait until water starts flowing from the valve.
3. Power the boiler leaving the gas tap closed.
4. Use the room thermostat or the remote control panel to activate
request for heat so that the three-way will turn to heating.
5. Turn on a tap to activate request for hot water (for instantane-
ous boilers only; use the water heater thermostat for boilers
just for heating connected to an external water heater) for an
interval of 30" every minute to make the three-way cycle from
heating to hot water and vice versa about ten times (the boiler
will be go into alarm as there is no gas under these
circumstances, it must therefore be reset every time this
happens).
6. Continue the sequence until water only comes out of the manual
air vent valve and the flow of air has finished; close the manual
air vent valve at this point.
7. Make sure the system is at the correct pressure (1 bar is ideal).
8. Close the manual filling tap on the hydraulic assembly.
9. Open the gas tap and switch on the boiler.
CH system emptying
Before starting work, disconnect the mains power supply by turning
off the main switch.
- Close the on-off taps of the heating system
- Manually loosen the system drain valve (D, fig. 7-8)
- The system water is discharged through the outlet collector (F,
fig. 7-8).
Use the supplied rubber hose to connect the manifold to a
suitable waste water collection and discharge system, in
compliance with current legislation.
DHW system emptying (C.S.I. only)
The hot water system must be emptied every time there is risk of
freezing by:
- turning off the tap at the mains
- turning on all the hot and cold taps
- emptying out the lowest parts of the system.
9
FUMES EXHAUSTION AND BURNING
.
EXHAUSTION CONFIGURATIONS (fig. 12)
Boiler is homologated for the following exhaustion configurations:
B23P/B53P Intake inside and outlet outside
C13 Concentric wall exhaustion. Pipes can separately start
from boiler, but outlets must be concentric or close
enough to be subject to similar wind conditions
(within 50 cm)
C23 Concentric exhaustion in common chimney (suction
and exhaustion in the same chimney)
C33 Concentric roof exhaustion. Outlets like C13
C43 Exhaustion and suction in common separate
chimneys, but subject to similar wind conditions
C53 Wall or roof separate exhaustion and suction in
different pressure areas. Exhaustion and suction must
never be located on opposite walls
C63 Exhaustion and suction with separately certified and
sold pipes (1856/1)
C83 Single or common chimney exhaustion and wall
suction
Refer to regulations in force for exhaustion of combustion products.
Products of combustion are evacuated by a centrifuge fan located
inside the air distribution box which is constantly monitored by the
control board.
Boiler is provided for without fume exhaustion/air suction kit, since
forced draught sealed chamber accessories can be used, as they
better adapt to installation characteristics.
For fume extraction and burning air restoration in boiler, use original
pipes or other EC-certified pipes with equivalent characteristics;
check connection is correct as shown on instructions fume
accessories provided for with. More appliances can be connected
to a single chimney, provided that all appliances are sealed
chamber type.
Boiler is a C-type appliance (sealed chamber) and must be safely
connected to fume exhaustion duct and burning air suction duct,
both getting outside; appliance cannot operate without these ducts.
"FORCED OPEN" INSTALLATION (TYPE B23P/B53P)
Fumes outlet duct ø 80 mm
The fumes outlet duct can be aimed in the most suitable direction
for installation needs.
To install follow the instructions supplied with the kit.
In this configuration, the boiler is connected to the ø 80 mm fumes
outlet duct by means of a ø 60-80 mm adaptor.
In this case, the combustion supporting air is taken from the
room in which the boiler is installed, which must be a suitable
and ventilated technical room.
Non-insulated fumes outlet ducts are potential sources of
danger.
The fumes outlet duct must be inclined 1% towards the boiler.
The boiler automatically adapts ventilation according to the
type of installation and the length of the duct.
28 C.S.I.
32 C.S.I.
36 C.S.I.
15 R.S.I.
25 R.S.I.
35 R.S.I.
INSTALLATION "SEALED" (TYPE C)
The boiler must be connected to concentric or twin fumes dis-
charge and air intake ducts which must both be taken outside. Do
not use the boiler without them.
Concentric ducts (ø 60-100 mm)
AIR SUCTION
The concentric outlets can be placed in the most suitable direction
for the requirements of the installation, respecting the maximum
lengths shown in the table.
The fumes outlet duct must be inclined 1% towards the boiler.
Non-insulated fumes outlet ducts are potential sources of
danger.
The boiler automatically adapts ventilation according to the
type of installation and the length of the duct.
Do not obstruct or narrow the comburent air inlet duct in any
way.
To install, follow the instructions supplied with the kits.
Horizontal
concentric duct ø 60-100 mm
28 C.S.I.
32 C.S.I.
36 C.S.I.
15 R.S.I.
25 R.S.I.
35 R.S.I.
7
max length
fumes outlet duct
ø 80 mm
70 m
60 m
60 m
70 m
70 m
70 m
max. linear length
7,80 m
7,80 m
7,80 m
7,80 m
7,80 m
7,80 m
pressure drop
for each bend
45° 90°
0,5 m 0,8 m
pressure drop
for each bend
45° 90°
0,5 m 0,8 m