18.3- Press button P three times (fig. 61).
On the display, in place of the hour, will be dis-
played and, in place of the indication for the tempera-
ture, will appear.
18.4- Press button P (fig. 62).
On the display, in place of the temperature, will
appear the value of the set thermal differential.
18.5- Press button (forward) o (backwards) (fig.
63) to modify this value as desired.