Ranco O22-7706 Pressure Control

The Ranco O22-7706 Dual Pressure Control is a versatile refrigeration component designed to consolidate high-pressure limit and low-pressure control functions into a single DPST (Double Pole Single Throw) unit. This O Series control features a low-pressure range of 10" Hg to 100 PSI and a high-side cutout range of 150 to 450 PSI. Built with a heavy-duty plated steel frame and a NEMA 1 enclosure, this unit is engineered for commercial refrigeration applications involving R12, R22, and R502. The 36-inch Super Cap capillary protection system with color-coded 1/4" SAE flare nuts ensures precise sensing while mitigating vibration-related fatigue.

For technicians, the convertible high-pressure reset allows for field selection between manual and automatic operation. The dual-pole switch configuration provides the capacity to directly control single or three-phase compressors, making it an essential commercial refrigeration pressure switch for pump-down cycles and compressor protection. With clear low and high-pressure scale plates and accessible laser-welded bellows, the O22-7706 simplifies refrigeration system troubleshooting and installation in walk-in coolers and industrial HVACR systems. This dual pressure refrigeration control is a preferred choice for contractors looking for universal mounting compatibility and robust electrical ratings.

• DPST Switching: Capable of managing multi-phase compressor motor loads directly without additional contactors.
• Convertible Reset: Flexible high-pressure limit settings allow for manual or automatic reset depending on system requirements.
• Super Cap Technology: Enhances the longevity of the 36-inch capillary tubes, reducing common failure points at the connection.
• Wide Compatibility: Tailored for legacy and current high-pressure refrigerants including R22 and R502 applications.

What is the differential for the Ranco O22-7706 high-pressure side?
The high-pressure function features a fixed 70 PSI differential, requiring the system pressure to drop significantly before the control allows a reset.

Can this dual pressure control be used for pump-down cycles?
Yes, the 10" Hg to 100 PSI low-pressure range is ideal for suction-side sensing and maintaining standard pump-down refrigeration configurations.

What does the DPST switch configuration provide for HVACR technicians?
The Double Pole Single Throw (DPST) switch allows for the simultaneous interruption of two power legs, making it suitable for direct control of single-phase 240V or pilot duty in three-phase 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.