Danfoss SM185-4RI Compressor

The Danfoss SM185-4RI Compressor is a high-performance hermetic scroll compressor engineered for commercial air conditioning applications. Operating on 460V 3-phase power at 60Hz, this unit delivers a nominal cooling capacity of 185,400 BTU/h. It serves as the direct replacement for SM185S4RA, featuring Rotolock connections with a 2-1/4" suction and 1-3/4" discharge for streamlined field installation. Utilizing internal motor protection and a mineral oil (160P) charge, the SM185-4RI is optimized for R22 refrigerant systems, although it remains compatible with certain R22-retrofit blends like R417A. With a swept volume of 249.9 cm³/rev and a net weight of approximately 220 lbs, this 15-HP class compressor ensures reliable operation in high-ambient environments. HVAC technicians should note the threaded oil sight glass and 3/8" flare oil equalization port, which facilitate parallel mounting configurations in multi-compressor racks.

• Drop-in replacement for legacy SM185S4RA models with identical footprints and Rotolock port alignments.
• 185,400 BTU capacity designed specifically for large-scale commercial rooftop units and chillers.
• High-efficiency scroll technology provides lower sound levels and reduced vibration compared to reciprocating alternatives.
• Robust motor protection prevents thermal overload and electrical failure under taxing load conditions.
• Flexible manifolding support via the built-in oil equalization connection for tandem or trio piping.

Is the SM185-4RI compatible with POE oil?
Standard SM series compressors ship with 160P mineral oil for R22 applications. If you are retrofitting a system for HFC refrigerants requiring POE oil, please look into the SZ series counterpart or ensure a complete oil flush and replacement.

What are the specific connection sizes for this model?
The unit features Rotolock fittings: the suction side is 2-1/4" and the discharge side is 1-3/4". This configuration allows for faster swap-outs compared to brazed connection models.

Can this compressor handle 400V power supplies?
Yes, the motor is rated for a 380-400V/3/50Hz or 460V/3/60Hz supply, making it versatile for various industrial electrical standards.

This item is not eligible for free shipping.

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.