Danfoss SY300A4PAI Compressor

The Danfoss SY300A4PAI is a high-capacity scroll compressor engineered for large-scale commercial air conditioning and heat pump applications. Operating on a 460V 3-phase power supply at 60Hz, this 25-ton powerhouse is optimized for R22 refrigerant but remains compatible with R407C and R134a systems when paired with the proper ester oil lubricants. Featuring rotolock connections for streamlined installation and maintenance, this unit simplifies the replacement process in complex HVACR circuits. It is the direct technical replacement for the discontinued SY300A4MAB model, maintaining identical physical dimensions and piping orientations to minimize field retrofitting. The internal motor protection and orbital scroll design ensure high volumetric efficiency and durability under demanding thermal loads. Contractors should verify oil levels and acid neutralizers when performing a drop-in replacement on older R22 systems to ensure long-term system stability and HVAC compressor performance.

Key Benefits for Contractors

• Direct Interchangeability: Seamlessly replaces the legacy SY300A4MAB model without extensive piping modifications.
• High Thermal Efficiency: Optimized for commercial HVAC systems, providing 300,000 BTU/hr nominal capacity.
• Simplified Connectivity: Uses rotolock fittings which reduce leak points compared to traditional brazed connections.
• Industrial Build Quality: Designed for continuous operation in chiller applications and large rooftop units.

Common Installation Questions

Is the SY300A4PAI compatible with POE oil?
Yes, this unit is shipped with high-quality Polyolester (POE) oil, making it suitable for both R22 and HFC transition refrigerants like R407C.

What is the voltage tolerance for this Danfoss scroll compressor?
The SY300A4PAI operates on a 460V/3Ph/60Hz platform with a rated voltage range of 414-506V to handle standard industrial power fluctuations.

Does this unit include the internal check valve?
Yes, the internal design includes a non-return valve to prevent refrigerant migration and protect the scroll sets during off-cycles.

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.