Johnson Controls P74FA-10 Pressure Control R-410A Proper airflow across the furnace

Proper airflow across the furnace heat strip is vital to prevent premature limit trips and oxidation of the coil surface

This specific model is calibrated for natural gas applications

Technicians should look for audible clicking without circuit activation

the McQuay Daikin 300043890 Relay serves as the primary safeguard for three-phase motor applications

For 2 PSI or 5 PSI systems

Johnson Controls P74FA-10 Pressure Control R-410A Proper airflow across the furnaceThe Johnson Controls P74FA 10 is a high performance differential pressure control engineered for precision monitoring in commercial HVACR systems. Designed with a Single Pole Double Throw (SPDT) switch, this unit excels in proof of flow applications across chillers and water cooled condensers. With an adjustable range of 2 to 26 PSI and a 1. 5 PSI fixed differential, it provides the narrow switch differential required for sensitive system feedback and