Beretta MYNUTE X R Installer And User Manual page 7

ƒ to activate the COMBUSTION CHECK function with an OTBus remote control connected,
you must temporarily disable the connection by setting the parameter P8.03 = 0. Remember
to reset this parameter once the function has finished.
We can see that it is not possible, with the OTBus remote control connected, to change the
values of the parameter P4.12 and P4.23 from 0 to 1.
Note: an OTBus remote control cannot be connected if the system already has BE16
interface boards. For the same reason it is not possible to connect BE16 boards if
there is already an OTBus device.
In this case the system gives the following error message: <<OTER>>.
High voltage connections
The connection to the mains supply must be made via a separation device with an omnipolar
opening of at least 3.5 mm (EN 60335/1 - category 3). The appliance works with alternating
current at 230 Volt/50 Hz, and is in compliance with Standard EN 60335-1. It is obligatory to
make the connection with a safe ground/earth, in compliance with current directives.
b
The installer is responsible for ensuring the appliance is suitably earthed; the ma-
nufacturer will not be liable for any damage resulting from an incorrect or absent
earth connection.
b
It is also advisable to respect the phase-neutral connection (L-N).
b
The earth conductor must be a couple of cm longer than the others.
b
To create the seal of the boiler use a clamp and tighten it on the cable grommet
used.
The boiler can operate with a phase-neutral or phase-phase (not floating) power supply.
It is forbidden to use gas and/or water pipes to earth electrical appliances.
Use the power cable supplied to connect the boiler to the mains power supply. If the power
cable has to be replaced, use a HAR H05V2V2-F, 3 x 0.75mm² cable, Ø max external 7 mm.
3.10 Gas connection
The connection of the gas supply must be carried out in compliance with current installation
standards. Before carrying out the connection, check that the type of gas is that for which
the appliance is set up.
3.11 Variable speed circulator
The modulating circulator function is active only in the heating function. In the switching of
the three-way on the domestic hot water, the circulator always operates at maximum speed.
The modulating circulator function applies only to the boiler circulator and not to circulators
of any external devices that are connected (e.g. relaunch circulator). There are 4 manage-
ment modes to choose from depending on the situations and the type of system.
Entering the P4 menu, parameter P4.05, it is possible to choose from:
1 - VARIABLE SPEED CIRCULATOR WITH PROPORTIONAL MODE (41 <= P4.05 <= 100)
2 - VARIABLE SPEED CIRCULATOR WITH CONSTANT ∆T MODE (2 <= P4.05 <= 40)
3 - CIRCULATOR IN FIXED MAXIMUM SPEED MODE (P4.05 = 1)
4 - EXCEPTIONAL USE OF A STANDARD CIRCULATOR WHOSE SPEED CANNOT BE
REGULATED (P4.05 = 0)
1 - VARIABLE SPEED CIRCULATOR WITH PROPORTIONAL MODE (41 <= P4.05 <= 100)
In this mode the boiler board determines which flow curve to be adopted for the instantaneous
output of the boiler .
2 - VARIABLE SPEED CIRCULATOR WITH CONSTANT ∆T MODE (2 <= P4.05 <= 40)
In this mode the installer sets the ∆T value to be kept between delivery and return (e.g.: entering
a value= 10 la the speed of the circulator will change to have a system flow rate with the aim of
keeping the ∆T upstream and downstream heat exchanger of 10°C).
3 - VARIABLE SPEED CIRCULATOR WITH FIXED MAXIMUM SPEED MODE (P4.05 = 1)
In this mode the circulator, when activated, always operates at maximum speed. Used in high
pressure drop systems where it is necessary to fully exploit the boiler discharge head in order to
provide sufficient circulation (system flow at maximum speed lower than 600 litres/hour). Used
when there are bottles of mixture with high flow rate in the downstream circuit. Operationally:
ƒ Enter parameter P4.05
ƒ Set the value = 1
4 - EXCEPTIONAL USE OF A STANDARD CIRCULATOR WHOSE SPEED CANNOT BE
REGULATED (P4.05 = 0)
This mode should be used in exceptional cases where you want use a traditional UPS circulator
in the boiler.
CONFIGURATIONS RECOMMENDED BY THE MANUFACTURER
OUTDOOR TEMPERATURE
SENSOR
(YES THERMOREGULATION)
LOW
ΔT constant
TEMPERATURE
(5 ≤ P4.05 ≤ 7)
(floor)
HIGH
TEMPERATURE ΔT constant
(radiators without (15 ≤ P4.05 ≤ 20)
thermostatic valves)
HIGH
TEMPERATURE ΔT constant
(radiators with (15 ≤ P4.05 ≤ 20)
thermostatic valves)
3.12
The circulator has an electronic reset function, however if a manual reset is necessary,
proceed as follows:
- use a Phillips screwdriver, preferably Phillips no. 2
- insert the screwdriver in the hole until it comes into contact with the reset screw, then
3.13
To access the components inside, remove the casing as indicated below:
- find and unscrew the 2 screws (A - fig. 11) fixing the casing to the boiler levering the two
- lift the casing upwards to release it from the top tabs (B - fig. 11), then remove it.
WARNING
b
b
b
b
3.14
To evacuate the combustion products, refer to UNI 7129-7131. Always comply with local
standards of the Fire Department, the Gas Company and with possible municipal disposi-
tions. The evacuation of the combustion products is carried out by a centrifugal fan and the
control board constantly monitors that it is operating correctly. It is essential for the evacua-
tion of the flue gases and the adduction of the boiler's combustion air that only original pipes
be used (except C6) and that the connection is made correctly as shown in the instructions
provided with the flue gases accessories. A single flue can be connected to several applian-
ces provided 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.
Suction/discharge pipes length table
Flue gases pipe Ø 80 mm
("forced open" installation)
(type B23P-B53P)
Concentric pipe
Ø 60-100 mm (horizontal)
Concentric pipe
Ø 60-100 mm (vertical)
Concentric pipe
Ø 80-125 mm
Twin pipe Ø 80 mm
b
b
b
OUTDOOR TEMPERATURE
SENSOR
b
(NO THERMOREGULATION)
b
PROPORTIONAL
(P4.05 = 85)
b
PROPORTIONAL
b
(P4.05 = 85)
b
PROPORTIONAL
b
(P4.05 = 60)
Manual reset of the circulator
press (basically the screw should go in by about 2 mm) and turn anti-clockwise.
Removing the casing
fixing clips (C - fig. 11), detach the bottom part of the casing
If removing the side panels, put them back in their initial position, referring to the
adhesive labels on their walls.
If the front panel is damaged it must be replaced.
The noise absorbing panels inside the front and side walls ensure the airtight seal
for the air supply duct in the installation environment.
It is therefore CRUCIAL after the dismantling operations to correctly reposition the
components to ensure the boiler's seal is effective.
Flue gas exhaust and combustion air suction (Fig. 12)
Maximum straight length
20 R
110 m
10 m
11 m
25 m
60+60 m 35+35 m 28+28m
The straight length includes the first bend (connection into the boiler), terminals
and joints. An exception is made for the vertical Ø 60-100 mm coaxial pipe, whose
straight length excludes bends.
The boiler is supplied without the flue gas exhaust/air suction kit, since it is possible
to use the accessories for condensing appliances that best fit the installation cha-
racteristics (see catalogue).
The maximum lengths of the pipes refer to the flue accessories available in the
catalogue.
It is compulsory to use specific pipes.
The non insulated flue gas outlet pipes are potential sources of danger.
The use of a longer pipe causes a loss of output of the boiler.
Make sure the flue gas discharge pipe is tilted 3° towards the boiler.
The exhaust pipes can face in the direction most suited to the installation
requirements.
As envisaged by current legislation, the boiler is designed to take in and dispose of
flue gas condensate and/or meteoric water condensate deriving from the flue gas
discharge system using its own siphon.
ENGLISH
Pressure drop
30 R 40 R Bend 45° Bend 90°
65m 53m 1 m 1.5 m
6 m 6m 1.3m
7 m 7m 1.3m
15 m 15m 1 m 1.5 m
1 m 1.5 m
1.6m
1.6m
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