York S1-025-19961-701 Belt

For field techs managing large-scale commercial refrigeration or rooftop units, the York S1-025-19961-701 is a critical OEM replacement part designed to maintain lubricant integrity during off-cycles. This belt type crankcase heater, often referred to as a belly band heater, provides a steady 45 watts of heat at 240 volts to prevent refrigerant migration into the compressor oil. Migrated refrigerant can lead to oil dilution and catastrophic bearing failure upon startup; this heater ensures the crankcase remains significantly warmer than the rest of the circuit to keep the system stable.

The S1-025-19961-701 is engineered with a flexible 24-30 inch diameter range, making it compatible with various Bristol compressors and other large-frame housings. It features 39-inch leads, providing ample length for routing through the electrical cabinet and securing to the contactor or control board. When installing this HVAC crankcase heater, ensure the band is seated flush against the compressor body for maximum thermal transfer and secured tightly to prevent localized overheating of the element.

• Prevents Refrigerant Migration: Maintains oil temperature to keep refrigerant in a vapor state, preventing slugging at startup.
• Optimized Heat Transfer: The belly band design ensures uniform contact around the compressor shell.
• Broad Compatibility: Adjustable fit for compressors with a 24" to 30" diameter.
• Durable Construction: Built to withstand the harsh environments of outdoor condensing units and high-vibration applications.

• Can this heater be used on a 208V circuit? While it will fit, the wattage output will drop significantly (approximately 34W), which may be insufficient for colder climates or large oil sumps.
• What is the primary cause of heater failure? Most failures occur due to loose mounting, which causes the element to overheat, or physical damage to the 39-inch leads during maintenance.
• Is this compatible with scroll compressors? Check the diameter; though designed for Bristol compressors, it works for any unit within the 24-30 inch spec.

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.