11
Part 2 - Operating Instructions
H . Date and Time
The control unit is equipped with a 365-day clock that displays
the day, month, year and time.
In order to ensure correct operation of the boiler when using
time programs, the date and time must be set correctly. If the
boiler is connected to the Wifi application, the Internet time is
automatically taken into account. Manual entry:
Day (1-31)
Months (1-12)
Year (2019)
Time (00:00)
/
/
(item 2 - Figure 1)
for the hour setting
(item 8 - Figure 1)
for setting minutes
Buttons
Buttons
I. Automatic CH Temperature Control (AUTO)
Automatic Temperature Control (AUTO) function allows the boiler to
adapt to outdoor temperature conditions and the type of system in
which it is installed.
Contact a qualified service technician to inform you about the device
and program the system to suit your needs.
If a room sensor (NTI accessory) is used, the boiler switches on / off
according to the current measured room temperature.
To activate the AUTO Function, set to ON via the User Menu.
Outlet temperature
Low temperature High tenperature
Outdoor temperature
Setpoint of the
room temperature
°C
°C
73
73
70
70
66
66
86
77
50
32
104
122
140
158
176
194
°F
4150596877
3.5
3.0
2.5
2.0
1.8
1.5
1.3
0.8
1.0
0.6
0.4
32 23 14 5 -4 -13 °F
0.8
0.6
1.0
0.4
0.2
NOTICE
To detect changes in room temperature it is necessary to install an NTI
Room Sensor. Other thermostats (not NTI) can only switch the boiler ON
and OFF.
J. Outdoor Heating Curve Slope
The Outdoor Heating Curve represents the operation of the boiler
when using an outdoor sensor.
The boiler control adjusts the supply temperature according to the
outdoor temperature.
The lower the outdoor temperature, the higher the boiler supply
temperature, and vice versa.
The supply temperature needed to efficiently satisfy a call for heat from
a thermostat depends on the heating system and building conditions
(building materials, insulation, etc.)
The slope of the Outdoor Heating Curve may be adjusted using the
“CH curves Slope” parameter from the User Menu, in order to adapt the
boiler supply temperature to the installation conditions.
A higher slope means that the maximum supply temperature is
achieved a higher outdoor temperature.
NOTE: The boiler supply temperature is limited upwards by the fixed
high limit
K. Outdoor Heating Curve Parallel Shift
If the ambient temperature is too hot or cold, regardless of the outdoor
temperature, use parallel shift to adjust the curve.
Depending on system conditions (settings on the boiler during
installation), a setting range of +/- 12°F (at low temperature) or +/- 25°F
(at high temperature) is possible.
The boiler will automatically shift the Outdoor Heating Curve
depending on the outside temperature (when parameter 4.7.5 is set to
1 = ON (factory setting).
If parameter 4.7.5 is set to 0 (OFF), the curve can be shifted using the
“CH curve parallel shift” parameter from the User Menu
The User may also modify the heating curve shift by pressing the CH +
and – buttons.
NOTE: This is only possible when parameter 4.7.5
is set to 0 (OFF).
Upon pressing the CH + or – buttons, the display
shows the current CH target temperature for 5
seconds.
After 5 seconds the display shows the amount of
shift, and allows the user to modify it by further
presses of the CH + or – buttons.
After few seconds the display shows the new CH
target and come back to the homescreen.
179 °F
120 °F
20 °F
0,4 3,51,3
Default
65 °F 80 °F
Target CH supply temperatureTarget CH supply temperature
Target CH supply temperature
Outdoor temperature
179 °F
120 °F
Outdoor temperature
Decrease parallel shift
Increase parallel shift
+25°F
0 °F
-25°F
Default
179 °F
120 °F
Outdoor temperature
0,4 3,51,3
Default
65 °F 80 °F
Target CH supply temperature
Target CH supply temperature
Target CH supply temperature
Outdoor temperature
179 °F
120 °F
Outdoor temperature
Decrease parallel shift
Increase parallel shift
+25°F
0 °F
-25°F
Default
179 °F
120 °F
Outdoor temperature
AUTO
1
Figure 7 - Outdoor Heating Curve adjustment
Figure 8 - Outdoor Heating Curve parallel shift
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