Electric Connection; Gas Connection - Beretta Mynute J 24 R.S.I. Manuel D'installation Et D'utilisation

ENGLISH
- Mark the holes for the hydraulic connections
- Remove the cardboard (or paper) template
- Check all the measurements are precise, then drill the holes using a bit with
the diameter indicated above
- Fix the crossbar to the wall using the plugs supplied
- Make the hydraulic connections
The position and size of the hydraulic connections are indicated below:
A CH return
B CH delivery
C

gas connection

D DHW output
E DHW input

3.3 Electric connection

The boilers leave the factory completely wired with the power cable already con-
nected and they only need the connection of the ambient thermostat (AT) to be
carried out in the specific terminals (page 101).
To access the terminal board:
- turn off the system general switch
- undo the fixing screws (A) of the shell (fig. 6)
- move forward and then upwards the shell base to unhook it from the chassis
- undo the fixing screws (B) of the instrument panel (fig. 7)
- turn the instrument panel upside down
- remove the terminal board cover (fig. 8)
- insert the cable of the possible T.A. (fig. 9)
The ambient thermostat must be connected as indicated on the wiring diagram
on page 101.
Ambient thermostat input in safety low voltage (24 Vdc).
The connection to the mains supply must be carried out through a separation
device with an omnipolar opening of at least 3.5mm (EN 60335-1, category III).
The appliance operates with an alternating current of 230 Volt/50 Hz and an
electrical power of 115 W (and complies with the standard EN 60335-1).
It is compulsory to carry out connection with an efficient earth circuit, ac-
cording to national and local legislation.
It is advisable to comply with neutral phase connection (L-N).
The earth wire must be a couple of centimetres longer than the others.
Do not use gas and/or water pipes to earth electrical appliance.
The manufacturer declines liability for any damage if the appliance was not con-
nected to an earth circuit.
Use the power cable supplied to connect the boiler to the mains power sup-
ply.
If the power cable is replaced, use a cable type HAR H05V2V2-F, 3 x 0.75 mm
with max. outside diameter 7 mm.
3.4 Gas connection
Before connecting the appliance to the gas network, check that:
- national and local regulations are complied
- the gas type is the one suitable for the appliance
- the piping is clean.
The gas pipe must be installed outdoor. If the pipe goes through the wall, it must
go through the central opening, in the lower part of the template.
It is advisable to install a filter of suitable dimensions on the gas line if the distribu-
tion network had solid particles.
Once the appliance has been installed check that connections are sealed accord-
ing to current installation regulations
3.5 Fumes exhaustion and air suction
For fumes exhaustion, refer to the current local and national regulations. Always
comply with local standards of the Fire Department, the Gas Company and with
possible municipal dispositions.
The release of combustion products is assured by a centrifugal fan placed inside
the combustion chamber and its correct operation is constantly checked by a
pressure switch. The boiler is supplied without the flue gas outlet/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.
It is essential for flue gas release and the restoration of boiler combustion air to
use certified pipes and that connection is carried out correctly as indicated by the
instructions supplied with the flue gas accessories.
With only one smoke pipe you can connect more pieces of appliance provided
that every piece of appliance is sealed chamber type.
CONCENTRIC OUTLETS (ø 60-100)
The boiler has been designed to be connected to concentric outlet/suction pipes
and with the opening for air suction (M) closed (fig. 10). The concentric outlets
can be placed in the most suitable direction according to room requirements,
complying with the maximum lengths indicated in the table.
For installation, follow the instructions supplied with the kit.
According to the length of the pipes used, it is necessary to insert a flange, select-
ing one from those contained in the boiler (see the following table).
4
3/4"
3/4"
3/4"
1/2"
1/2"
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).
24 R.S.I.
Pipe length [m]
up to 0.85
from 0.85 to 2.35
from 2.35 to 4.25
(**) fitted in boiler
Concentric pipes (ø 80/125)
The boiler has been designed to be connected to concentric outlet/suction pipes
and with the opening for air suction closed.
The concentric outlets can be placed in the most suitable direction according to
room requirements, complying with the maximum lengths indicated in the table.
For installation, follow the instructions supplied with the kit.
To go through the wall, drill a hole of Ø 140 mm.
According to the length of the pipes used, it is necessary to insert a flange select-
ing from those contained in the boiler (see table).
24 R.S.I.
Pipe length
Ø 80 125 [m]
from 0.96 to 3.85
from 3.85 to 7.85
from 7.85 to 12.4
Pay special attention to external temperature and pipe length. Refer to the
diagrams in order to establish if it is compulsory or not to use a condensation
collector.
In case of operation at temperature lower than 60 °C, it is compulsory to use a
condensation collector.
If a condensation collector is used, provide a slope of the flue exhaust pipe of
1% towards the collector.
Connect the condensation trap syphon to a white water outlet pipe.
Non insulated outlet pipes are potential sources of danger.
,
2
Mynute 24 R.S.I.
MAXIMUM LENGTH OF CONCENTRIC PIPES Ø 80/125
COMPULSORY
CONDENSATE BASIN
OUTSIDE TEMPERATURE (°C)
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).
24 R.S.I.
Pipe length [m]
28 R.S.I. E
2+2
> 2+2 ÷ 6+6
> 6+6 ÷ 16+16
(*) fitted in boiler
Load losses for each
Flue gas flange (L)
bend (m)
45°
Ø 42
1
Ø 44 (**)
not installed
Load losses for each
Flue gas flange
bend (m)
(L)
45°
Ø 42
Ø 44
1.35
not installed
NON-COMPULSORY CONDENSATE
BASIN
Load losses for each
Flue gas flange (L)
bend (m)
28 R.S.I. E
45°
Ø 42
0.5
Ø 44 (*)
not installed
90°
1.5
90°
2.2
90°
0.8