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Idiomas disponibles
Idiomas disponibles
MYNUTE X R
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 compensation curve (parameter OTD CURVES - fig. 20)
The compensation 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 compensation curve nearest the value obtained.
if the value obtained from the calculation is 1.3, this is between curve 1 and curve
Example:
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 CH and the parameter OTD CURVES
to set the pre-selected thermoregulation curve:
ƒ access the technical parameters menu, as indicated in the paragraph "3.19 Access to
the parameters"
ƒ select the menu CH and then OTD CURVES
ƒ press the key
to confirm
ƒ set the desired climatic curve with the
ƒ confirm with
Enter
.
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 "4.9 Adjusting the heating
water temperature with an outdoor temperature sensor connected".
NIGHT COMPENSATION (parameter NIGHT COMP - fig. 20)
If a ROOM THERMOSTAT is connected to a programming timer, from the menu CH
parameter NIGHT COMP the night compensation can be enabled. To set the night
compensation:
ƒ access the technical parameters menu, as indicated in the paragraph "3.19 Access to
the parameters"
ƒ select the menu CH and then NIGHT COMP
ƒ press the key
to confirm
ƒ set the parameter to 1
ƒ confirm with
Enter
.
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 "4.9 Adjusting the heating water
temperature with an outdoor temperature sensor connected".
4.6
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 a
scrolling message is displayed on the interface screen "AIR PURGING CYCLE IN
PROGRESS".
18
and
arrow keys
The purge cycle can be interrupted early by keeping key 2 pressed for at least 2 seconds
(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.
4.7
Operating status
For changing the operating status from WINTER to SUMMER to OFF press key 1 until the
icon for the desired function is displayed.
WINTER MODE
ƒ Set the boiler to the WINTER status by pressing key 1 until both the domestic hot water
icon and the heating icon are displayed.
The interface normally displays the delivery temperature unless there is a domestic hot
water request in progress, in which case the domestic hot water temperature is displayed.
ƒ When there is a heat request and the boiler is igniting, the icon
display.
Heating REQUEST, the radiator icon blinks:
SUMMER MODE (only with water tank connected)
ƒ Set the boiler to the SUMMER status by pressing key 1 until the domestic hot water
icon is displayed.
In this status the boiler activates the traditional function of just domestic hot water, the
interface normally displays the delivery temperature. In the event of a domestic hot water
pick up, the display shows the temperature of the domestic hot water.
Domestic hot water REQUEST, the tap icon blinks:
OFF
ƒ Set the boiler to the OFF status by pressing key 1 until the central segments are
displayed.
appears on the
Bar
DAY
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