the McDonnell & Miller 194-B acts as a combination controller

this actuator delivers a 90-second power-on drive time for stable modulation in commercial and industrial fluid control applications

729 BTU to handle peak summer loads without compromising system discharge temperatures

providing the exact pin-outs and logic for non-communicating 2-stage heating and cooling applications

Built by Therm-O-Disc

York S1-4101-00 Valve 318973-401 the McDonnell & Miller 194-BThe York S1 4101 00 Valve is a direct acting solenoid valve engineered specifically for high pressure demand in R410A systems. This E2S120 HP solenoid valve features a 1 4" sweat (ODF) connection and is designed as a normally closed (NC) component, ensuring precise refrigerant flow control during equipment cycling. Built to meet rigorous OEM standards, this refrigerant solenoid valve provides the necessary durability to handle the increased operating