MARS 43307 Pressure Switch 320788-702 OEM motors like the S1-031-00977-001

OEM motors like the S1-031-00977-001 feature specific shaft lengths and torque curves tailored to the unit's blade pitch

consult the McDonnell & Miller technical manual for site-specific modifications

this 75VA control transformer provides the consistent current capacity necessary to prevent voltage drops that cause intermittent system locking or erratic operation

while the high-quality elastomer seat discs ensure positive seating under varying pressure differentials

Simplified Installation: Comes complete with mounting screws and a 1/4-inch spade connector for quick field adaptation

MARS 43307 Pressure Switch 320788-702 OEM motors like the S1-031-00977-001Finding a reliable replacement for high pressure cut out applications requires components that withstand rigorous cycling. The MARS 43307 Pressure Switch is a heavy duty, capsule type control engineered for HVACR system protection and compressor safety. This specific high pressure switch features an SPST open on fall configuration, calibrated for 400 PSI cut in and 300 PSI cut out. Rated for R 410A compatibility and other high pressure refrigerants,