Beretta 20141085, Installation Manual, Page: 60 / 112

60
Mode 2
(Working on climatic mode with attenuation controlled by a room/heat
demand thermostat, variable set point according to the outdoor tem-
perature)
In this case the thermal module operates with a set-point defined by
the climatic curve (which can be set in the same way as described
in Mode 1) depending on outdoor temperature. Heat demand is ac-
tioned independently from whether the room/heat demand thermo-
stat's contact is closed and stops only when the outdoor temperature
is greater than the one defined by the parameter 25.
In this mode the parameter 28 defines by how many degrees the
set-point is decreased (attenuation) when the room/ heat demand
thermostat's contact is opened.
Par.
No. Description
109 Defines the value of the set point calculated on climatic
mode (Par. 1 = 1).
19 Establishes the max. set-point at the minimum outdoor
temperature for climatic regulation
20
Establishes the minimum outdoor temperature to which
the maximum set-point can be associated for climatic
regulation
21 Establishes the minimum set-point at the maximum out-
door temperature for climatic regulation
22
Establishes the maximum minimum outdoor temperature
to which the minimum set-point can be associated for
climatic regulation
23 Limits the minimum value that can be assigned to the set-
point in heating mode (does not apply to heating mode 4).
24 Limits the maximum value that can be assigned to the set-
point in heating mode (does not apply to heating mode 4).
25 Defines the temperature at which climatic regulation is
switched off
28 Use the heating mode Par. 1= 2 or 3. Defines how many
degrees the flow set point is lowered.
Delivery Temp.
(°C)
Outdoor Temp. (°C)
Tset min (°C)
Tset max (°C)
Par. 109
Par. 24
Par. 23
Par. 20 Par. 22 Par. 25
Par. 19
Par. 109
Par. 28 Par. 21
Mode 3
(Continuous fixed set-point operation with attenuation controlled by
room/heat demand thermostat)
In this mode the fixed set-point is adjusted in the same way as de-
scribed for Mode 0. The difference consists in the fact that the de-
mand is always active and the set-point is decreased (attenuation) by
the value defined by the parameter 28 when the room/heat demand
thermostat's contact is opened.
Par.
No. Description
3
Sets the desired flow temperature with heating mode.
Active for the heating mode Par. 1 = 0 o 3
23 Limits the minimum value that can be assigned to the set-
point in heating mode (does not apply to heating mode 4).
24 Limits the maximum value that can be assigned to the set-
point in heating mode (does not apply to heating mode 4).
28 Use the heating mode Par. 1= 2 or 3. Defines how many
degrees the flow set point is lowered.
Delivery Temp.
(°C)
Outdoor Temp. (°C)
Tset min (°C)
Tset max (°C)
Setpoint @TA=ON
Par. 24
Par. 23
Par. 28
Par. 03
Attenuation setpoint
@TA=OFF
b
The outdoor temperature sensor (accessory) is not required
and if connected the outdoor temperature that is measured
does not influence the setpoint that has been set.
Mode 4
(Set-point adjustment based on a 0-10V analogical input)
The parameters that control this mode are the following:
Par.
No. Description
110 Sets the minimum delivery temperature value in heating
mode (Par. 1) = 4.
111 Sets the maximum delivery temperature value in heating
mode (Par. 1) = 4.
The operation set-point is adjusted on the basis of the following curve:
1.5 1.0 2.0 10 0
OFF ON ON/OFF
Hysterese
Temperature
(°C)
Voltage (V)
Par. 111
Par. 110