When installing the 246-424 Johnson Controls gasket

unlike manual reset versions that require a technician to physically press a button

Check your existing switch for the part number 1NT21L-2163 or THT2436

Always verify the L-rating printed on your existing part before installation

eliminating the need for field modifications or adjustments during installation

KMC Controls SSS-1003 Sensor When installing the 246-424 JohnsonThe KMC Controls SSS 1003 Sensor is a professional grade differential pressure flow sensor designed for high accuracy airflow monitoring in Variable Air Volume (VAV) terminal units. This 5 13 32" pitot tube airflow sensor features two sensing points and is engineered to integrate seamlessly with the KMC SSS 1000 series, providing technicians with reliable velocity pressure data. It is physically and functionally identical to the 21 238 airflow sensor,