Tjernlund Products PS1505 Prover Switch 326058-757 making it a critical component

making it a critical component for commercial air handling units and rooftop unit freeze protection

but note that the heat output will be reduced to approximately 2

Standardized Frame: The NEMA 42Y frame ensures accurate mounting and alignment in existing brackets

Universal SPST switching logic for flexible configuration as either a high-limit safety or a circulator activator

ensuring drop-in compatibility with legacy and current 1/2" NPT configurations

Tjernlund Products PS1505 Prover Switch 326058-757 making it a critical componentThe Tjernlund Products PS1505 Prover Switch is a critical safety interlock designed specifically for Tjernlund Auto Draft inducers. As a veteran grade fan proving safety switch, it monitors vacuum pressure within the fan housing to verify that the inducer is operating at peak performance before allowing the burner circuit to fire. This SPST air pressure switch features a non adjustable set point of 0. 05" 0. 02" W. C. (increasing vacuum), ensuring