Heater banks are used in AHUs to control the humidity of the air supplied to the building. For a better energy efficiency, rather than switching the heaters on full power, proportional controllers can modulate the heating power based on the level of an analog input.
Our proportional controllers - RGC1P , RGC2P and RGC3P series are suitable for 1-phase and 3-phase heaters. With full cycle switching method, the heater power can be modulated from 0% to 100% with no EMC disturbance. Full cycle switching is available on the RGC1P via the setting on the selector switch and on the RGC2P and RGC3P C1 models.