Ranco O16-209 Pressure Control

The Ranco O16-209 is a heavy-duty SPDT pressure control engineered for high-pressure cut-out applications in commercial refrigeration and air conditioning systems. Designed as a reliable high pressure limit switch, this control features an adjustable range of 150 to 450 PSI and a fixed differential of 40 PSI, ensuring precise system protection and cycling. Built for the field, it includes a manual reset mechanism that prevents equipment restarts until a technician inspects the system, making it essential for protecting compressors against excessive head pressure.

Constructed with a NEMA 1 enclosure and a non-conductive cover, the O16-209 pressure switch is compatible with R12, R22, and R502 refrigerants and utilizes a 1/4" SAE male flare connection for secure line integration. The unit features SPDT switch action, allowing for flexible wiring where the unused terminal can be utilized for alarm signaling. Its laser-welded bellows provide extended service life under high-pulsation conditions, while the high-amp rated terminals (24 F.L. Amps at 240V AC) allow for direct control of motors or pilot duty applications with a contactor.

• Manual Reset Safety: Prevents automatic restarts after high-pressure events to protect the compressor from damage.
• Rugged Construction: Features a heavy-duty plated steel frame and laser-welded bellows for maximum durability in harsh environments.
• Easy Installation: Equipped with a universal mounting design and raised, fully accessible screw terminals for fast field wiring.
• Clear Calibration: Includes a large, easy-to-read scale plate for accurate pressure setting adjustments.
• Versatile Signaling: SPDT configuration supports both primary control and remote alarm notification.

What is the difference between the O16-209 and automatic reset controls?
The O16-209 requires a manual physical reset after the pressure exceeds the setpoint, whereas automatic controls reset once pressure drops below the differential. This is a critical safety feature for high-limit protection.

Can this control be used for low-pressure applications?
No, this specific model is designed for high-pressure cut-out (150-450 PSI). For suction-side monitoring, a low-pressure control from the Ranco O-series should be selected.

What refrigerants is the O16-209 compatible with?
It is widely compatible with standard HCFC and CFC refrigerants such as R-22, R-12, and R-502. Always verify compatibility with newer synthetic blends before installation.

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.