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INTRODUCTION
Mode 3
(Continuous fixed set-point operation and 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 by the value
defined parameter 28 when the room/heat demand thermostat's
contact is opened.
Par.
No. Description
3
Sets the desired supply temperature with heating mode.
Active for the heating mode Par. 1 = 0 or 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 supply set point is lowered.
Supply Temp.
°F (°C)
Outdoor Temp. °F (°C)
Tset min °F (°C)
Tset max °F (°C)
Setpoint @TA=ON
Par. 24
Par. 23
Par. 28
Par. 03
Setpoint @TA=OFF
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NOTE
: The outdoor temperature sensor (sold as an 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 analog input)
The parameters that control this mode are the following:
Par.
No. Description
110
Sets the minimum supply temperature value in heating
mode (Par. 1) = 4.
111
Sets the maximum supply 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
°F (°C)
Voltage (V)
Par. 111
Par. 110
The maximum and minimum set-point values are defined respec-
tively by Par. 111 and 110.
When the input voltage value exceeds 1.5V, the demand is triggered
(at the minimum set-point).
For voltage values ranging from 2 to 10, the set-point varies in a
linear fashion from the minimum through to the maximum value.
If the voltage is decreased from 10 to 2, the set-point decreases in a
linear fashion and maintains the minimum value between 2 and 1
V. For values lower than 1 V the demand stops.
