York S1-025-33474-480 Crankcase Heater

The York S1-025-33474-480 Crankcase Heater is a critical component for maintaining compressor reliability in commercial HVAC systems. This belt-type crankcase heater is engineered to deliver 90 watts of regulated heat at 480 volts, ensuring that refrigerant remains in a gaseous state within the compressor oil during the off-cycle. Designed for large-diameter compressors, this unit fits 29-36 inch diameters and features 64-inch leads for flexible wiring within the control cabinet. By preventing liquid migration and subsequent oil dilution, this belly band heater mitigates the risk of catastrophic bearing failure and "slugging" during cold starts. As a genuine York OEM replacement part, it ensures precise fitment and thermal transfer efficiency for Bristol and Copeland compressor applications, maintaining the high-voltage performance standards required by industrial-grade chillers and rooftop units.

Key Benefits:

• Prevents refrigerant migration and oil foaming during low ambient conditions.
• Robust 480V 90W heating element provides consistent thermal load for high-voltage commercial circuits.
• Adjustable belly band design secures firmly around 29" to 36" compressor housings for maximum heat transfer.
• Extra-long 64-inch lead wires simplify installation in complex wiring configurations.
• Critical for extending the service life of scroll and reciprocating compressors in cold climates.

Common Questions:

How do I confirm if this heater fits my compressor?
This HVAC crankcase heater is designed for shells with a diameter between 29 and 36 inches. Measure the circumference of your compressor; if it falls between approximately 91" and 113", this belt-style heater is the correct specification.

Will this work on a 208/230V system?
No, this model is specifically rated for 480V AC. Using it on a lower voltage system will significantly reduce the wattage output (Ohm's Law), failing to provide sufficient heat to the oil reservoir.

Can the lead wires be shortened during installation?
Yes, the 64-inch leads can be trimmed to fit your specific conduit or terminal block requirements, provided the connections remain secure and meet local electrical codes for high-voltage HVACR components.

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.