Danfoss SM120-4VI Scroll Compressor

The Danfoss SM120-4VI Scroll Compressor is a high-performance hermetic solution designed specifically for air conditioning applications utilizing R-22 refrigerant. Engineered with a swept volume of 166.6 cm³, this unit delivers a nominal cooling capacity of 125,300 BTU/h. Operating on a 460V 3-phase 60Hz power supply, the SM120-4VI is built for reliability in demanding commercial environments. This model features brazed ODF connections—7/8" on the discharge side and 1-3/8" on the suction side—ensuring a secure, leak-proof fit for standard HVACR refrigeration systems. As a direct drop-in replacement, the SM120-4VI is functionally identical to part numbers P040-12571, SM120S4VC, and 1098233. Its robust internal design includes a gas intake configuration that provides superior resistance to liquid slugging, while advanced acoustic isolation significantly reduces decibel levels during heavy-cycle operation. For technicians servicing multi-zone or large-tonnage units, this commercial scroll compressor offers the high-efficiency performance and mechanical durability required to maintain system integrity.

• Direct Compatibility: Seamlessly replaces P040-12571 and SM120S4VC without requiring extensive piping modifications.
• High Thermal Stability: Specifically optimized for R22 systems, maintaining stable discharge temperatures even under high-load conditions.
• Superior Fluid Handling: Features a reinforced scroll set designed to mitigate damage from liquid refrigerant migration.
• Acoustic Optimization: Built with internal sound spacers to minimize vibration and operational noise in RTU and chiller applications.
• Industrial Grade Build: Rated for a Maximum Operating Current (MOC) of 24A with internal overload protection for motor safety.

Is the SM120-4VI compatible with R407C or R417A?
While primarily designed for R22, technical documentation indicates compatibility with R417A when used with regulated mineral oil. Always verify oil type (160P Mineral) before transitioning refrigerants.

What are the electrical requirements for this 125,300 BTU compressor?
This unit requires a 460V 3-phase supply. It features an LRA (Locked Rotor Amps) of 130A and is designed for fixed-speed operation in commercial HVAC units.

Does this compressor include the necessary mounting hardware?
Yes, standard mounting grommets and bolts are typically included to ensure proper vibration dampening during installation.

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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.