Description
Enhanced System Safety: Employs close on fall logic to verify proper draft before allowing the gas valve to energize
High Close-off Pressure: Designed to maintain 100% bubble-tight shut-off
Can the superheat be adjusted in the field
a cracked or high-resistance heating element is often the culprit
McDonnell & Miller FS254 Snap Switch R-410A Enhanced System Safety: Employs closeThe McDonnell & Miller FS254 Snap Switch (Part Number 120610) is a heavy duty, general purpose liquid flow switch engineered for high reliability monitoring in HVACR and industrial hydronic systems. This unit is the direct replacement for the legacy FS 254 and offers a field proven solution for starting or stopping electrically operated equipment including automatic burners, circulator pumps, and system alarms. Built with a NEMA 4 enclosure, the FS254