High-Efficiency ECM Technology: Significantly lowers amperage draw under partial load

it maintains precise superheat control across varying load conditions

The dry contact relay configuration is rated for resistive

Enhanced Reliability: The thermal-magnetic trip unit provides precise protection against overloads and short-circuit events

York S1-9951-1801 Orifice 320788-704 High-Efficiency ECM Technology: Significantly lowersThe York S1 9951 1801 Orifice is a precision engineered fixed bore metering device designed for specific residential and light commercial HVAC applications. Featuring a . 180" orifice size (Sz15), this component is critical for maintaining accurate refrigerant flow control within the evaporator coil. As a genuine OEM replacement part, it ensures proper pressure drops across the liquid line, optimizing heat exchange efficiency in York, Coleman, and