Aaon G024540 Pressure Switch

The Aaon G024540 High Pressure Switch is an essential safety component engineered for commercial HVAC units, providing critical protection against over-pressurization. Specifically calibrated for R-410A systems, this switch features a 475/650 PSI operating range, functioning as a high-limit cutout. As a manual reset pressure switch, it requires technician intervention following an event, ensuring that the root cause of high head pressure is addressed before the system resumes operation. Technical data confirms that the G024540 is the direct replacement for P97420, maintaining exact fitment and electrical specifications for AAON rooftop units and chillers. It utilizes a 1/4" SAE female flare connection with a valve core depressor for secure, leak-free integration into the high-side liquid or discharge line. This heavy-duty single-pole single-throw (SPST) encapsulated switch is designed to withstand the vibration and thermal cycling common in industrial HVACR pressure control applications, offering consistent set-point repeatability for professional contractors.

• Precise Pressure Protection: Factory-set to open at 650 PSI and close at 475 PSI to prevent compressor damage.
• Direct OEM Compatibility: Verified as the functional upgrade and successor to the Aaon P97420 pressure switch.
• Internal System Safety: The manual reset feature compels a physical inspection of the condenser coils and fan motors when tripped.
• Durable Construction: Encapsulated design resists moisture and debris, critical for the demanding environments of AAON equipment.
• Simplified Installation: Standard 1/4 inch flare fitting allows for rapid field replacement without brazing.

Is the G024540 compatible with older P97420 installations?
Yes, this unit is the official replacement for part number P97420, providing the same form factor and electrical ratings for a seamless swap.

What is the reset type for this high pressure switch?
This is a manual reset switch (MR). Unlike automatic reset versions, this requires a technician to manually press the reset button once pressures return to a safe range (below 475 PSI).

Can this be used with refrigerants other than R-410A?
While designed for high-pressure R-410A applications, it is compatible with most HFC, HCFC, and CFC refrigerants, provided the system's safe operating limits align with the 650 PSI cutout.

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.