We reserve the right to make changes without prior notice
51
6.7.4 Setpoint offset
The setpoint offset function is designed to change the summer or the winter setpoint value depending on the
external air temperature with the purpose of maximising the unit energy efficiency or to enhance comfort in the
ambient.
Summer offsetting is controlled by a differential which may be either positive or negative. The summer setpoint
is offset proportionally to the gap between the actual external air temperature and the corresponding setpoint.
The system also allows setting of the max. offset value, i.e. the max. setpoint variation within the offset
differential. If the differential setpoint is positive, the summer setpoint increases as the air temperature rises;
on the other hand, if the differential is negative, the summer setpoint decreases as the air temperature rises.
Similarly, winter offsetting is controlled by means of an external air temperature setpoint and a differential
which may be either positive or negative. The winter setpoint is offset proportionally to the gap between the
actual external air temperature and the corresponding setpoint. The system also allows setting of the max.
offset value, i.e. the max. setpoint variation within the offset differential. If the differential setpoint is positive,
the winter setpoint increases as the air temperature decreases; on the other hand, if the differential is negative,
the winter setpoint decreases as the air temperature drops.