York S1-025-38939-480 Heater

The York S1-025-38939-480 Heater is a heavy-duty crankcase band heater specifically engineered for industrial-grade HVACR compressors. Operating at 480V with a 90W power output, this belly band heater provides consistent thermal regulation between 28.7-35.7°C to prevent refrigerant migration during the off-cycle. This essential York OEM replacement part is the functional successor to the S1-025-37424-460, ensuring high-voltage systems maintain proper oil viscosity and avoid hazardous flooded starts.

For field technicians, the S1-025-38939-480 offers a versatile fit for compressor diameters ranging from 8.5 inches to approximately 11 inches. The wrap-around heater design facilitates maximum surface contact with the compressor shell, ensuring efficient heat transfer to the sump. This prevents liquid slugging, which often leads to mechanical failure in 480-volt commercial rooftop units and chiller systems. Professionals should verify the mounting tension to ensure the 90 watt crankcase heater remains secure across the vertical shell seam for optimal longevity.

• Direct OEM Compatibility: Engineered as the formal S1-025-38939-480 replacement for seamless integration into 480V York equipment.
• Optimized Thermal Range: Maintains a 28.7-35.7°C window to keep oil above the refrigerant's saturation point.
• Durable Construction: Built with robust leads and a high-tension clamp for reliable performance in harsh industrial environments.
• Enhanced Protection: Effectively eliminates oil dilution to prolong the service life of commercial scroll and reciprocating compressors.

• Does this heater replace the obsolete S1-025-37424-460? Yes, this unit is the designated York direct replacement for that specific 460/480V model.
• Can I use this on a 208/230V system? No, this is a 480V heater; applying lower voltage will result in insufficient heat output, while higher voltage will cause immediate burnout.
• Is this suitable for 8.5" diameter compressors? Yes, the adjustable band is designed to fit standard industrial compressor sizes including 8.5" diameters.

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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.