Aaon P86520 Pressure Switch

The Aaon P86520 Pressure Switch is a critical safety component designed for high-pressure monitoring in Aaon HVAC systems. Engineered specifically for R22 refrigerant circuits, this manual reset high pressure switch functions as a fail-safe to prevent compressor damage during over-pressure conditions. Calibrated to trigger at 450 PSI, the P86520 ensures the system shuts down before internal pressures exceed safe operating limits. This HVAC pressure switch replacement features a robust construction capable of withstanding the vibration and thermal cycling common in commercial rooftop units and chillers. For technicians performing maintenance or emergency repairs, this OEM Aaon part provides the exact electrical specifications and thread patterns required for seamless integration into existing control loops without the need for field modifications.

• System Protection: Provides reliable high-limit cutout at 450# M/R to protect the compressor from catastrophic failure.
• Manual Reset Functionality: Requires physical intervention after a trip, ensuring the technician can diagnose the root cause of the high-pressure event.
• Application Specific: Optimized for R22 high-pressure switch applications in legacy Aaon equipment.
• Industrial Build Quality: Designed for long-term reliability in demanding commercial and industrial environments.

What is the trip point for the Aaon P86520?
This switch is factory-set to trip at 450 PSI and requires a manual reset once pressure drops below the reset threshold.

Is the P86520 compatible with modern R410A systems?
No, this unit is specifically calibrated for the pressure curves of R22 systems. Using it on an R410A system will cause premature tripping due to the higher operating pressures of the newer refrigerant.

Why is a manual reset switch preferred over an automatic reset?
A manual reset ensures that the system does not continuously cycle under fault conditions, which prevents further mechanical damage and alerts the operator to a potential blockage or fan failure.

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.