Daikin-McQuay 251700403 Compressor

The Daikin-McQuay 251700403 is a high-efficiency Daikin scroll compressor engineered for commercial HVAC applications utilizing R407C refrigerant. Operating on a 460V 3-phase power supply, this unit provides reliable performance in demanding climate control systems. This replacement HVAC compressor features a robust internal design optimized for low vibration and high volumetric efficiency, making it a drop-in solution for specific Daikin Applied and older McQuay chillers or rooftop units. When performing a compressor replacement, ensuring proper oil management and system dehydration is critical for longevity. This model is built to sustain high compression ratios while maintaining thermal stability during peak load conditions. Its hermetic construction prevents refrigerant leaks and protects internal components from contaminants. Technicians should verify Daikin 251700403 specifications regarding BTU capacity and frame size to ensure a precise mechanical match during installation.

Key Benefits

• High Volumetric Efficiency: Advanced scroll technology minimizes gas re-expansion, improving overall system EER.
• R407C Compatibility: Specifically designed for R407C transition applications, ensuring chemical compatibility with POE lubricants.
• Robust 460V Electrical Profile: Engineered for industrial 3-phase power stability, reducing the risk of motor overheating under high-torque starts.
• Low Sound Power Levels: The scroll geometry reduces mechanical discharge pulses compared to reciprocating alternatives.
• Direct Fit Support: Built to original equipment manufacturer (OEM) tolerances for seamless integration into existing Daikin-McQuay circuits.

Common Questions

What oil is pre-charged in the Daikin 251700403?
This scroll compressor is typically factory-charged with Polyolester (POE) oil, which is necessary for moisture management and lubrication in R407C systems.

Can this compressor be used as a retrofit for R22 systems?
While R407C is a common R22 replacement, you must verify that the expansion valve (TXV) and elastomer seals are compatible with the new refrigerant and oil before installation.

What are the wiring requirements for this unit?
As a 460V 3-phase motor, proper phase sequencing is mandatory to prevent reverse rotation, which can lead to immediate mechanical failure in scroll designs.

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.