Ranco O12-4833 Pressure Control

The Ranco O12-4833 Pressure Control is a heavy-duty dual function pressure control designed for precise regulation and protection in commercial refrigeration and HVAC systems. This SPST switch configuration combines high-pressure limit and low-pressure suction sensing into a single, compact NEMA 1 enclosure, reducing installation time and parts count on the job site. The low-pressure side features an automatic reset with a range of 12" hg to 50 psi and an adjustable differential of 5 to 35 psi, making it ideal for pump down cycles or low-charge protection. For high-side safety, the control offers a convertible reset (manual or automatic) with a cut-out range of 150 to 450 psi and a fixed 70 psi differential. Built for the field, it includes a 48-inch capillary with 1/4" flare nut connections and the Super Cap protection system to prevent vibration-induced fractures. Compatible with R12, R22, and R502 refrigerants, it is a versatile replacement for Johnson Controls P70 and Honeywell P421 series units.

• Dual-Function Integration: Consolidates high-limit and suction pressure control into one SPST device to streamline HVACR wiring.
• Convertible High-Side Reset: Technician-selectable manual or automatic reset provides flexibility for diverse commercial refrigeration safety requirements.
• Rugged Enclosure: Features a non-conductive cover and NEMA 1 rated housing to protect internal screw terminals and scale plates.
• Enhanced Vibration Durability: The 48-inch Super Cap capillary system reduces the risk of copper work-hardening and refrigerant leaks.
• Universal Compatibility: Direct cross-reference for common OEM controls including the P70LB-6 and P70MA-18.

Can this control be used with R-410A systems?
This specific model is traditionally rated for R-12, R-22, and R-502. Always verify that the high-side cut-out range of 450 psi meets the requirements of your specific high-pressure refrigerant application.

Is the mounting bracket included?
Yes, this unit typically ships with a universal mounting bracket and can be oriented vertically or horizontally without affecting the calibration of the bellows sensing elements.

Does it support 240V applications?
Yes, the Ranco O12-4833 is rated for up to 24 F.L. Amps at 240V AC, making it suitable for direct control of single-phase compressors or pilot duty for larger contactors.

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.