Beretta MYNUTE X C Installer And User Manual page 6

MYNUTE X
In particular on the boiler display:
ƒ it is no longer possible to set the boiler OFF/WINTER/SUMMER status (it is set by the
OTBus remote control)
ƒ it is no longer possible to set the domestic hot water setpoint (it is set by the OTBus
remote control)
ƒ it is not possible to activate the COMBUSTION CONTROL function if the boiler is con-
nected to a remote OTBus.
In addition:
ƒ the domestic hot water setpoint is displayed in the INFO menu
ƒ the combination of the A+B keys remains active for the setting of the DOMESTIC HOT
WATER COMFORT function
ƒ the heating setpoint set on the boiler display is used only if there are heat requests
from the TA and the OTBus remote control does not have a request if the parameter
DO_AUX1 = 1 or DO_AUX1 = 0 and the jumper on 1-2pin of X21 is closed.
We can see that it is not possible, with the OTBus remote control connected, to change the
values of the parameter MAIN ZONE ACTUATION TYPE and ZONE1 ENABLE to 1.
Note: an OT+ 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 OT+ device.
In this case the system
<<OT+ CONFIGURATION ERROR>>.
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
manufacturer 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.
3.9 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.
3.10 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 management
modes to choose from depending on the situations and the type of system.
Entering the CH menu, parameter PUMP CONTROL TYPE, it is possible to choose from:
1 - VARIABLE SPEED CIRCULATOR WITH PROPORTIONAL MODE (41 <= PUMP
CONTROL TYPE <= 100)
2 - VARIABLE SPEED CIRCULATOR WITH CONSTANT ∆T MODE (2 <= PUMP CONTROL
TYPE <= 40)
3 - CIRCULATOR IN FIXED MAXIMUM SPEED MODE (PUMP CONTROL TYPE = 1)
4 - EXCEPTIONAL USE OF A STANDARD CIRCULATOR WHOSE SPEED CANNOT BE
REGULATED (PUMP CONTROL TYPE = 0)
1 - VARIABLE SPEED CIRCULATOR WITH PROPORTIONAL MODE (41 <= PUMP
CONTROL TYPE <= 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 <= PUMP CONTROL
TYPE<= 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 (PUMP
CONTROL TYPE = 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 PUMP CONTROL TYPE
ƒ Set the value = 1
4 - EXCEPTIONAL USE OF A STANDARD CIRCULATOR WHOSE SPEED CANNOT BE
REGULATED (PUMP CONTROL TYPE = 0)
This mode should be used in exceptional cases where you want use a traditional UPS circulator
in the boiler.
6
gives the following error
CONFIGURATIONS RECOMMENDED BY THE MANUFACTURER
LOW
TEMPERATURE
(floor)
HIGH
TEMPERATURE
(radiators without
thermostatic valves)
HIGH
TEMPERATURE
(radiators with
thermostatic valves)
3.11 Manual reset of the circulator
The circulator has an electronic reset function, however if a manual reset is necessary, proceed
message:
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 press
(basically the screw should go in by about 2 mm) and turn anti-clockwise.
3.12 Removing the casing
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
fixing clips (C - fig. 11), detach the bottom part of the casing
- lift the casing upwards to release it from the top tabs (B - fig. 11), then remove it.
WARNING
b
If removing the side panels, put them back in their initial position, referring to the
adhesive labels on their walls.
b
If the front panel is damaged it must be replaced.
b
The noise absorbing panels inside the front and side walls ensure the airtight seal for the
air supply duct in the installation environment.
b
It is therefore CRUCIAL after the dismantling operations to correctly reposition the
components to ensure the boiler's seal is effective.
3.13 Flue gas exhaust and combustion air suction (Fig. 12)
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
dispositions. 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 evacuation 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 appliances 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
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.
b
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
characteristics (see catalogue).
OUTDOOR TEMPERATURE OUTDOOR TEMPERATURE
SENSOR
(YES THERMOREGULATION)
ΔT constant
(5 ≤ PUMP CONTROL TYPE
(PUMP CONTROL TYPE = 85)
≤ 7)
ΔT constant
(15 ≤ PUMP CONTROL TYPE
(PUMP CONTROL TYPE = 85)
≤ 20)
ΔT constant
(15 ≤ PUMP CONTROL TYPE
(PUMP CONTROL TYPE = 60)
≤ 20)
Maximum straight length
25C 30C 35C
110 m 65m 65m
10 m 6 m 6 m
11 m 7 m 7 m
25 m 15 m 15 m
60+60 m 33+33 m 35+35 m
SENSOR
(NO THERMOREGULATION)
PROPORTIONAL
PROPORTIONAL
PROPORTIONAL
Pressure drop
Bend Bend
40C
45° 90°
53m 1 m 1.5 m
6 m 1.3m 1.6m
7 m 1.3m 1.6m
15 m 1 m 1.5 m
28+28 m 1 m 1.5 m