Three easy steps – Thermolec Application &Technical Notes User Manual
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THREE EASY STEPS
STEP 3 - (continued)
Comparison between ON/OFF and proportional control
Due to it’s high differential, ON/OFF control mode wastes a lot of energy. The graphic below shows
how the ON/OFF method creates high "overshoot" above 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 variations of the ON/OFF method. This represents an energy saving
of approximately 15%.