Description
The Trane CNT04990 SPST Air Pressure Control is a pressurizing switch for HVAC systems to monitor airflow conditions. It operates on a 24V control circuit and is to activate or deactivate the system operator when air reaches approximately 0.26″ WC. Mounted in compatible heating and cooling equipment, it supports verifying proper airflow through ducts or combustion systems. This control is commonly used in furnaces and air handlers to support safe operation by signaling the system when airflow conditions are within acceptable limits for continued performance.
