The Viridian 3452, ECM circulator has been introduced for commercial systems. The wet rotor line includes the VR3452 variable speed circulator for chilled and hot water, up to 34 feet of shut-off head and 52 gpm flow. Offers auto mode (default), and proportional pressure control, constant pressure control, constant speed and night setback. The LED displays watts, flow and RPM. Available in 115 or 230 volts. Optional communication module provides: Ethernet and Modbus RTU, analog control input 0 – d 10 V, three inputs/outputs, one relay output, main and standby operation.