Functional Devices PSM20A12DAS Power Supply R-448A ensuring a tight seal within

ensuring a tight seal within the filter cabinet to prevent bypass

15" WC SPDT pressure switch designed for critical monitoring in high-efficiency heating systems

including heat pump systems

Its robust cross-section (7/16" thickness) is specifically built for reliability in high-horsepower compressor and pump applications where belt stretch must be minimized to prevent premature pulley wear

Testing for continuity across the fan terminals will confirm

Functional Devices PSM20A12DAS Power Supply R-448A ensuring a tight seal withinThe Functional Devices PSM20A12DAS is a heavy duty, track mounted isolated linear DC power supply designed for precision in building automation and HVACR control systems. Engineered to convert a 24 VAC input into a stable, adjustable 1. 5 14 VDC output, this unit is a staple for technicians powering sensitive low voltage sensors, thermostats, and controllers that require ripple free power. With a 300mA output current rating and Class 2 UL listing, it