Instruction Manual

THREE EASY STEPS
STEP 3 - (continued)
Comparison between ON/OFF and propor
tional contr
ol
Due to it’s high diff
erential, ON/OFF control mode w
astes a lot of energy. The graphic below shows
how the ON/OFF method creates high "o
v
ershoot" abov
e the temperature set point while the
electronic proportional method keeps the temperature close to the set point. The shaded areas
correspond to wasted energy
.
A proportional control can thus maintain an accurate room or discharge
temperature without the typical v
ar
iations of the ON/OFF method. This represents an energy sa
ving
of approximately 15%.