Ranco O12-1550 Pressure Control Refrigerant Look for audible hissing at

Look for audible hissing at the actuator head

Enhanced Protection: The included heavy-duty cover prevents accidental adjustment and environmental contamination of the electrical terminals

with a specialized progressive differential for precise calibration

Critical Safety: Properly communicates with the integrated furnace control to verify flame presence within the specified timing window

Ranco O12-1550 Pressure Control Refrigerant Look for audible hissing atThe Ranco O12 1550 dual pressure control is a precision engineered HVACR safety switch designed for commercial refrigeration systems utilizing non corrosive refrigerants. This Dual Pressure Controller features a low pressure side ranging from 10" WC to 100 PSI and a high pressure manual reset side factory set at 325 PSI. Engineered for reliability, the SPST switch action ensures precise compressor cycling and high end protection against head pressure