and Janitrol furnaces and air handlers

it must be installed with the flow arrow pointing toward the expansion device for proper filtration

For field technicians and mechanical contractors managing damper assemblies and valve trains

restricted heat exchanger

What is the primary indicator that the pilot assembly needs replacement

York S1-028-12385-700 Sheave and Janitrol furnaces and airThe York S1 028 12385 700 Sheave is a professional grade 1 groove variable pitch pulley engineered for precision air balancing in commercial and residential air handlers. Featuring a standard 7 8 inch bore, this adjustable component allows technicians to fine tune blower speeds and system CFM by modifying the pitch diameter. As an OEM S1 028 12385 700 replacement, it ensures exact mechanical compatibility with Johnson Controls and York blower