Ranco O11-1711 Control

The Ranco O11-1711 High Pressure Control is a heavy-duty single pressure control designed for professional HVACR applications requiring reliable system protection. This SPST high pressure switch features an open-on-rise action, effectively cutting out the compressor circuit when discharge pressures reach dangerous levels, specifically within the 150 to 450 PSI range. Built with a laser-welded bellows for extended service life, the O11-1711 includes an automatic reset function and an adjustable differential between 40 and 150 PSI, allowing for precise calibration on the job site. The unit comes equipped with a 36-inch capillary with a 1/4-inch SAE flare nut for easy integration into existing liquid or discharge lines. Its NEMA 1 enclosure and non-conductive cover ensure safe operation, while the high-visibility scale plate allows for quick set-point verification. This control is compatible with a wide range of refrigerants, including R-22, R-134A, R-404A, and R-410A.

Key Benefits

• Broad Compatibility: Engineered for use with high-pressure refrigerants, making it a versatile choice for commercial refrigeration and air conditioning.
• Super Cap Protection: Features the Super Cap capillary protection system, incorporating a vibration cone to reduce stress on brazed joints.
• Simplified Wiring: Raised screw terminals provide full accessibility, significantly reducing installation time for contractors.
• Robust Construction: The heavy-duty plated steel frame and universal mounting design allow for flexible installation in various positions.

Common Questions

What is the primary application for the O11-1711?
This control is primarily used as a high-limit safety cut-out to protect compressors from excessive system pressure caused by condenser fan failure or fouled coils.

Does this switch require a manual reset?
No, the O11-1711 is an automatic reset control, meaning it will restore the circuit once the pressure drops below the set differential.

Can this be used for unloader applications?
Yes, as an SPST open-on-rise control, it is commonly utilized for unloader applications and pilot duty control in commercial systems.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.