Danfoss SM125-4QAI Scroll Compressor

The Danfoss SM125-4QAI Scroll Compressor is a high-capacity solution engineered for large-scale commercial air conditioning and industrial process cooling. Operating at 460V 3Ph, this unit delivers a nominal 126,400 BTU capacity specifically designed for R22 refrigerant systems. Built with the signature Danfoss mineral oil (160P), the SM125S4QC architecture features a brazed connection type and a standard large-format scroll design that minimizes vibration and mechanical stress during high-load cycles. This 10-HP class compressor is frequently utilized in rooftop units and chillers where maintaining a consistent HVAC compressor replacement standard is critical for system reliability and oil management.

For technicians performing a drop-in replacement, the SM125-4QAI provides excellent liquid handling capabilities thanks to its 7.5-inch diameter and robust internal components. The motor is protected against overheating via internal line breaks, ensuring longevity in demanding environments. This model is recognized for its high EER energy efficiency and low sound envelopes, making it ideal for facilities where noise mitigation and R22 scroll compressor performance are twin priorities.

Key Benefits for Your Installation:

• Optimized for R22 Systems: Specifically designed to maintain legacy infrastructure while meeting modern commercial HVAC maintenance efficiency requirements.
• High BTU Output: Delivers 126,400 BTU/hr to handle heavy-duty cooling loads in packaged units and split systems.
• Reliable Lubrication: Ships pre-charged with high-quality mineral oil to ensure proper lubrication of the scroll sets during initial startup.
• Robust Electrical Specs: The 460V 3-phase configuration reduces amp draw compared to lower voltage models, lowering stress on electrical contractors and breakers.
• Compact Footprint: Standard Danfoss frame allows for straightforward integration into existing configurations without extensive piping modifications.

Common Technical Questions

What is the proper oil type for the SM125-4QAI?
This unit uses Danfoss 160P mineral oil. If you are retrofitting, ensure the system is flushed and the lubricant is compatible with R22 applications.

Can this compressor be used with synthetic refrigerants?
The SM125-4QAI is optimized for R22. Using different refrigerants may require an oil change to POE and a review of the expansion valve and seal compatibility.

What are the mounting requirements for this 126k BTU unit?
It uses a standard 4-bolt mounting pattern. Always check the rubber grommets and sleeve height to ensure proper vibration isolation during high-torque startup.

This item must ship via truck. Please contact us for freight quote.

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.