Danfoss SM175-3QAI Scroll Compressor

The Danfoss SM175-3QAI is a high-performance industrial scroll compressor engineered specifically for R22 refrigerant applications in large-scale commercial HVAC systems. This 230V 3-phase compressor delivers a nominal capacity of 174,300 BTU/h, making it a reliable choice for heavy-duty chillers and rooftop units. Utilizing a large internal free volume and a robust motor design, the Danfoss SM175 handles liquid slugging effectively while maintaining high volumetric efficiency. Built with brazed connections and a dedicated oil sight glass, this unit facilitates straightforward installation and monitoring in the field. When performing a R22 compressor replacement, this model provides the thermal stability and mechanical endurance required for sustained high-ambient operation. Its scroll orbital design reduces the number of moving parts, significantly lowering vibration levels and mechanical noise compared to reciprocating alternatives. For contractors managing Danfoss scroll compressor cross-references, the SM175-3QAI ensures consistent mass flow and reliable oil management for long-term system integrity.

Key Benefits

• High thermal efficiency for commercial HVAC R22 systems.
• Robust 230V 3-phase motor designed for high-torque starts and low amperage draw.
• Integrated oil sight glass and 3/8-inch NPT oil equalization port for tandem compressor configurations.
• Superior liquid handling capabilities due to the large internal free volume.
• Low sound power levels for noise-sensitive commercial installations.

Common Questions

What is the proper oil charge for the SM175-3QAI?
This model typically ships with a mineral oil charge (160P) specifically formulated for R22 systems. Always verify oil levels via the sight glass after a standard pump-down or system retrofit.

Can this compressor be used with R407C?
While the SM series is physically robust, the SM175-3QAI is optimized for R22. If retrofitting with R407C, a complete oil flush and replacement with POE oil is mandatory to ensure proper lubrication and material compatibility.

What are the connection sizes for this unit?
The unit features a 1-5/8 inch suction rotolock connection and a 1-1/8 inch discharge rotolock connection, typically adapted for brazed piping in commercial circuits.

How do I obtain a freight quote for this unit?
Due to its weight and industrial classification, this compressor requires specialized handling. Please contact our technical team to arrange truck freight logistics.

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.