Within the Zones – Configuration Zone / 3 page it is possible to associate one or more zones with the DHW Special Mode instead of the Seasonal mode:

In this case, the hysteresis is taken from DHW Page and the global enable is that of DHW (not heating/cooling) on the Configuration 1 Page. This zone, being used for the DHW, will always activate below the set point and it will deactivate above the current set point + hysteresis.

For all other characteristics (set point, surplus mode, circuit assignment, etc) you can consider the same ones specified for the zones.