whereas the 100XL typically fits 3/4 inch connections and supports significantly higher BTU ratings

reducing the risk of overheating during a short circuit in the low-voltage field wiring

This is an SPNO fan relay used to switch line-voltage fan motors or other resistive/inductive loads on and off based on a 208/240V signal from the controller

sharing the same technical specifications and robust build quality

York S1-028-15208-000 Sheave Els PW 17895 whereas the 100XL typically fitsThe York S1 028 15208 000 is a precision engineered fixed sheave designed for industrial and commercial HVAC drive systems. This OEM component features a 1 inch bore and a single groove profile, specifically balanced to ensure seamless power transmission between the blower motor and the fan assembly. As the designated technical replacement for the discontinued S1 028 12359 700, it maintains the exact mechanical tolerances required to preserve factory