verify that the diaphragm actuation matches the factory-set inches of water column (WC) to ensure system reliability and code compliance

The 19V33 kit provides the control module and mounting hardware

reducing diagnostic time for service contractors

Direct Replacement: Verified substitute for legacy Armstrong parts

Daikin-McQuay 01EC-9021 Control Board 322838-754 verify that the diaphragm actuationThe Daikin McQuay 01EC 9021 Control Board is a critical OEM replacement part designed for precision climate management in commercial HVACR systems. As a primary printed circuit board (PCB), it serves as the central intelligence for your unit, managing communication between the thermostat, sensors, and mechanical components. This Daikin replacement board is engineered to restore factory standard performance, ensuring that system logic correctly