Aaon P77560 Switch

The Aaon P77560 Fan Cycle Switch is an essential pressure-actuated control designed for condensing unit head pressure management in commercial HVAC systems. This high-pressure cut-out switch features specific setpoints of 270 PSI close (CI) and 150 PSI open (CO), ensuring precise fan motor cycling to maintain optimal refrigerant temperatures across varying ambient conditions. Often referenced as reaching the same technical specifications as the Aaon 27099 switch, this component is a direct drop-in replacement for specific Series 270 pressure controls. Built for durability in high-cycle environments, the P77560 refrigerant pressure switch utilizes a SPST (Single Pole Single Throw) contact configuration to regulate fan operation efficiently. For field technicians, verifying the NPT connection size and electrical ratings is critical before installation to ensure compatibility with existing Aaon rooftop units or chillers. This switch is vital for preventing compressor overheating and maintaining system efficiency during low-ambient cooling operations.

• OEM Compatibility: Fully interchangeable with Aaon 27099 for streamlined inventory and rapid field replacement.
• Precise Pressure Calibration: Factory-set 270/150 PSI thresholds provide consistent head pressure control without manual adjustment.
• Heavy-Duty Construction: Engineered to withstand the rigors of high-frequency cycling in commercial HVACR applications.
• Optimized System Efficiency: Improves condenser fan management, contributing to more stable subcooling and superheat levels.

Is the Aaon P77560 compatible with R-410A systems?
Yes, the 270/150 PSI setpoints are designed to handle the operating pressures typical of R-410A and high-pressure refrigerant condenser fan cycling.

Can I use the P77560 to replace a 27099 switch?
Specifications confirm that the P77560 is identical to the 27099, allowing for direct cross-referencing and installation in Aaon equipment.

What is the contact action for this fan cycle switch?
This switch operates on a "Close on Rise" logic, activating the fan when high-side pressure reaches 270 PSI and deactivating it once it drops to 150 PSI.

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.