This function allows automatic air return setpoint variation within a preset range, based on a signal sent to the unit controller. The function monitors in real time the input

value (temperature read by the remote T+H probe) and calculates the offset value based on the parameters. This value is then added to the return setpoint or subtracted

from it, therefore becoming an "offset" setpoint.

Enabling the function forces to controller to consider the return temperature as controlled temperature, unless it is specified that the unit fan adjust their own numbers of

revolutions based on the return temperature.

The logic is shown below.

To ensure independent management of the offset both during cooling and heating, a second set of three parameters for the heating setpoint has been introduced.

Note: The previous chart shows a condition when the entered P27.27 value is below 0.

The parameters for enabling and managing the function are under the "Optional" menu, which can be accessed by entering the "Service" password.

Technical manual

Offset setpoint (°C)

P27.24

P50.01

P27.22

Figure 4-2: Chart showing the setpoint offset based on the T+H probe

Offset setpoint (°C)

P50.02

P27.27

P27.25