W7215B1004 Honeywell

THE HONEYWELL W7215B1004 SOLID ThermostatE ECONOMIZER C/O CNTRL, SPDT RelayS, 2 Sensor INPUTS FOR Differential ENTHALPY (C7400), 1 ADDITIONAL INDOOR & 1 ADDITIONAL OUTDOOR Air Sensor IN- PUT (2-10VDC), USE W/ HW SERIES 72 MotorS &