Interface Unit, 4 Speed, 24 Volt AC, 4 Taps, Without Plate

The EVO/™ECM-4Spd-PRO allows ~24V thermostats and controls to select one of four adjustable flow indexes for a PWM or 0 to +10V controlled EC Motor. The control has four taps to select the desired flow index. An adjustment associated with each call sets the flow index to the desired value. The adjustment range is from Off to 100% of the programmed control range. A fifth adjustment sets the flow index when no call is selected.
The EVO/™ECM-4Spd-PRO changes the flow index at a 1% per second rate. This ramping feature reduces occupant awareness of changes in diffuser airflow.