This model is specifically designed for R410A refrigerant only

a functioning Trane SWT3083 should show 0 ohms (continuity) across the terminals

the internal diaphragm shifts to close the electrical contacts

which is critical for proper airflow direction in specified air handlers

Belimo NRX24-SR-T-N4 Actuator 328140-751 This model is specifically designedThe Belimo NRX24 SR T N4 is a professional grade non spring return actuator engineered for high performance modulation in demanding HVACR environments. This direct coupled actuator delivers a reliable 70 in lb torque, making it a staple for contractors managing proportional control across NEMA 4X rated installations. Built for versatility, the unit operates on a standard 24VAC DC power supply and accepts a 2 10 VDC control signal, ensuring seamless