Honeywell W7215B1004/U Series 72 Economizer Logic Module. This Demand Control Ventilation (DCV) Sensor used with a C7232 C02 sensor (2-10 Vdc); and Honeywell Series 72 actuators, or M7415 Damper Actuator to proportion outdoor and return air dampers for economizer and ventilation control in commercial HVAC equipment.
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