7B potentiometer switch

Is the Lennox 13Y55 compatible with both R-22 and R-410A systems

If you are replacing a 174260 board

5 MFD / 370 VAC run capacitor (sold separately)

and mixed gas service in 1/2-inch piping systems

Superior Radiant CE021 Air Switch 322027-701 7B potentiometer switchThe Superior Radiant CE021 Air Switch is a critical safety and operational component designed for high performance radiant tube heaters. Engineered with a 0. 55" WC negative pressure rating, this differential pressure switch ensures that the combustion blower is moving sufficient air before allowing the ignition sequence to proceed. As a veteran technician knows, maintaining precise airflow differential is vital for preventing incomplete combustion