TM_s-MEXT_ME28relC_00_12_19_EN
Technical manual
TRANSLATION OF THE ORIGINAL INSTRUCTIONS
73
4.3
RETURN SETPOINT COMPENSATION
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.
P50.01
Offset setpoint (°C)
P27.23
P27.22
P27.24
Probe reading (°C)
Figure 4-2:
Chart showing the setpoint offset based on the T+H probe
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.
P50.02
P27.26
P27.25
P27.27
Probe reading (°C)
Offset setpoint (°C)
Figure 4-3:
Chart showing the setpoint offset based on the T+H probe
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
.
