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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 "8.12 Range
rated" 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 (PA-
RAMETER P4.19)
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 " "5.1 Access to the parameters""
ƒ select the menu P4 and then P4.19
ƒ press the key
to confirm
ƒ set the desired climatic curve with the
keys
Enter
ƒ confirm with
.
CURVE DI TERMOREGOLAZIONE
THERMOREGULATION CURVES
100
90
T80
80
70
60
50
T45
40
30
20
20
15
10
5
Temperatura esterna (°C)
EXTERNAL TEMPERATURE (°C)
T80 Maximum temperature heating setpoint for std systems
T45 Maximum temperature heating setpoint for floor systems
40
and
arrow
3,0
2,5
2,0
1,5
1,0
0,8
0,6
0,4
0,2
0
-5
-10
-15
-20
OFFSET ON THE REFERENCE AMBIENT TEMPERATURE
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 ""5.8.4
Adjusting the heating water temperature with an outdoor
temperature sensor connected"".
CORREZIONE CURVA CLIMATICA
CLIMATE CURVE CORRECTION
90
80
70
60
50
40
30
+5°C
20
0°C
-5°C
10
30
25 20 15
Temperatura esterna (°C)
EXTERNAL TEMPERATURE (°C)
NIGHT COMPENSATION (PARAMETER P4.20)
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 " "5.1 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 "5.8.4
Adjusting the heating water temperature with an outdoor
temperature sensor connected".
RIDUZIONE NOTTURNA PARALLELA
PARALLEL NIGHT TIME REDUCTION
90
80
70
DAY TEMPERATURE
Curva climatica GIORNO
CURVE
60
50
40
30
20
10
20
15
10
Temperatura esterna (°C)
EXTERNAL TEMPERATURE (°C)
8.14 LIGHTS AND FAULTS
10
5
0
-5 -10 -15 -20
NIGHT TEMPERATURE
Curva climatica NOTTE
CURVE
5
0
-5
-10
-15
-20
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