Setting The Thermoregulation - Beretta MYNUTE X R Installer And User Manual

MYNUTE X R
P5.10
NOT AVAILABLE ON THIS MODEL
P5.11
NOT AVAILABLE ON THIS MODEL
P8 (CONNECTIVITY menu)
P8.01
This parameter is used to manage the boiler remotely. Three values are available for this pa-
rameter:
0 = FACTORY-SET VALUE. The interface on the machine is operational but the boiler can
also be controlled remotely if the Modbus device for WiFi/Bluetooth connection is attached
to the connector under the shelf (optional accessory, not supplied as standard)
1 = remote boiler control is disabled, only the interface on the machine is operative. If con-
nected, the Modbus device for WiFi/Bluetooth connection is ignored, while a connection
error is generated when connecting a Modbus remote control (REC10) and the error
<<COM>> is shown
2 = you can connect a Modbus remote control (REC10) to control the boiler; the interface on
the machine is disabled and <<RCTR>> is shown on the display. Only the MENU button
for changing parameter P8.01 remains active.
P8.03
This parameter is used to enable remote boiler management using an OpenTerm device:
0 = With the OT+ function disabled, you cannot control the boiler remotely using an OT+
device. If this parameter is set to 0, any OT+ connection is instantly interrupted, and the
"xx" icon and "OTB" message on the display are switched off
1 = FACTORY-SET VALUE. With the OT+ function enabled, you can connect an OT+ device
to control the boiler remotely. When you connect an OT+ device to the boiler, the "xx" icon
lights up on the display and "OTB" appears.
4.4

Setting the thermoregulation

Enabling THERMOREGULATION occurs in the following way:
ƒ access the technical parameters menu, as indicated in the paragraph "3.21 Access to
the parameters"
ƒ select the menu P4 and then P4.18 = 1.
Thermoregulation only works with the outdoor temperature sensor connected and active
only for the HEATING function. If P4.18 = 0 or outdoor temperature probe disconnected
the boiler operates at a fixed point. The temperature measured by the outdoor temperature
sensor is displayed in "4.20 INFO menu" under I0.09. The thermoregulation algorithm
will not directly use the outdoor temperature, but rather a calculated outdoor temperature
that takes into account the building's insulation: in buildings that are well insulated, the
outdoor temperature variations will have less impact than those that are poorly insulated
by comparison.
REQUEST FROM OT CHRONOTHERMOSTAT
In this case the delivery setpoint is calculated by the chronothermostat according to the
outdoor temperature value and the difference between the ambient temperature and the
desired ambient temperature.
REQUEST FROM ROOM THERMOSTAT
In this case the delivery setpoint is calculated by the adjustment board according to the
outdoor temperature value so as to obtain an estimated outdoor temperature of 20°
(reference ambient temperature).
There are 2 parameters that compete to calculate the output setpoint:
ƒ slope of the compensation curve (KT)
ƒ offset on the reference ambient temperature.
Selecting the thermoregulation curve (parameter P4.19 - fig. 20)
The thermoregulation curve for heating maintains a theoretical temperature of 20°C
indoors, when the outdoor temperature is between +20°C and -20°C. The choice of the
curve depends on the minimum outdoor temperature envisaged (and therefore on the
geographical location), and on the delivery temperature envisaged (and therefore on the
type of system). It is carefully calculated by the installer on the basis of the following formula:
KT = T. outlet envisaged - Tshift
20- min. design external T
Tshift = 30°C standard system
25°C floor installations
If the calculation produces an intermediate value between two curves, you are advised to
choose the thermoregulation curve nearest the value obtained.
Example: if the value obtained from the calculation is 1.3, this is between curve 1 and curve
1.5. Choose the nearest curve, i.e. 1.5.
The settable KT values are as follows:
ƒ Standard system: 1.0-3.0
ƒ floor system 0.2-0.8.
Through the interface it is possible to access the menu P4 and the parameter P4.19 to set the
pre-selected thermoregulation curve:
ƒ access the technical parameters menu, as indicated in the paragraph "3.21 Access to
the parameters"
16
ƒ select the menu P4 and then P4.19
ƒ press the key to confirm
ƒ set the desired climatic curve with the
Enter
ƒ confirm with .
OFFSET ON THE REFERENCE AMBIENT TEMPERATURE (fig. 20)
The user can, in any event, indirectly intervene on the value of the HEATING setpoint
setting, with reference to the reference temperature (20°C), an offset within the range -5 -
+5 (offset 0 = 20°C). For correcting the offset see the paragraph "4.8 Adjusting the heating
water temperature with an outdoor temperature sensor connected".
NIGHT COMPENSATION (parameter P4.20 - fig. 20)
If a ROOM THERMOSTAT is connected to a programming timer, from the menu P4
parameter P4.20 the night compensation can be enabled. To set the night compensation:
ƒ access the technical parameters menu, as indicated in the paragraph "3.21 Access to
the parameters"
ƒ select the menu P4 and then P4.20
ƒ press the key to confirm
ƒ set the parameter to 1
Enter
ƒ confirm with .
In this case, when the CONTACT is CLOSED, the heat request is made by the flow sensor,
on the basis of the outdoor temperature, to obtain a nominal ambient temperature on DAY
level (20°C). The opening of the contact does not produce a switch-off, but a reduction
(parallel translation) of the climatic curve on NIGHT level (16°C). Also in this case, the user
can indirectly modify the value of the HEATING setpoint inserting once again an offset on
the reference DAY temperature (20°C) rather than NIGHT (16°C) that can vary within the
range [-5 - +5]. For correcting the offset see the paragraph "4.8 Adjusting the heating water
temperature with an outdoor temperature sensor connected".
4.5 First commissioning
ƒ Position the system's master switch to the "on" position.
ƒ Open the gas tap to allow fuel to flow.
ƒ With power on the backlight comes on, then all the icons and the segments come on for
1sec and in sequence the firmware revision is displayed for 3sec:
ƒ Then the interface displays the status active at that moment.
Vent cycle
b
Each time that the boiler is powered, an automatic vent cycle is carried out lasting 6
min. When the air purging cycle is in progress all heat requests are inhibited except
those for domestic hot water when the boiler is not set to OFF and -AIR is displayed
on the interface screen.
The purge cycle can be interrupted early by keeping key 2 (the icon RESET comes on). The
purge cycle can also be interrupted, if the boiler is not set to OFF, by a domestic hot water
request.
ƒ Adjust the ambient temperature thermostat to the desired temperature (~20°C) or, if the
system is equipped with a programmable thermostat or timer, ensure that the thermostat
or timer is "active" and set correctly (~20°C)
ƒ Then set the boiler on WINTER or SUMMER depending on the type of operation desired.
ƒ The boiler will start up and continue working until the set temperatures are reached, after
which it will then go back to standby.
and arrow keys