Copeland 918-0019-04 Crankcase Heater

The Copeland 918-0019-04 is a professional-grade, belt-type crankcase heater engineered for critical compressor protection in commercial and residential refrigeration systems. Operating at 240 Volts with a 70 Watts power output, this wrap-around heater is designed to maintain optimal sump temperatures during the off-cycle. By keeping the compressor oil warm, it effectively prevents refrigerant migration and minimizes the risk of liquid slugging at startup, which is a primary cause of mechanical failure in scroll and reciprocating units. This OEM Copeland part features a rugged construction that withstands high-ambient conditions without carbonizing the oil, ensuring the lubricant remains fluid even in cold-weather outdoor or rooftop installations. It is a direct fit for several Copeland scroll compressor series, including ZB, ZF, and ZR models, providing a reliable thermal barrier against compressor flooded starts.

• Enhanced Compressor Longevity: Eliminates liquid refrigerant dilution in the oil, ensuring immediate lubrication upon startup.
• Precise Thermal Output: The 70W capacity provides sufficient heat to counter low ambient temperatures without overheating the compressor base.
• Broad Compatibility: Validated for use with high-capacity Copeland scroll compressors such as the ZB11M, ZB92K, and ZF24K through ZF48K series.
• Durable Belt Design: The 30-inch lead length and flexible wrap-around crankcase heater belt allow for secure, high-contact heat transfer to the compressor shell.
• Field-Proven Reliability: UL-recognized component built to withstand the rigors of heavy-duty HVACR duty cycles.

What happens if a crankcase heater is not installed on an outdoor unit?
Without a functional 240V crankcase heater, refrigerant vapor can migrate to the coldest part of the system—the compressor oil sump. During a cold start, this results in "slugging," where the compressor attempts to compress liquid, often leading to broken scroll sets or damaged valves.

Can this heater be used on compressors other than Copeland?
While technically a wrap-around heater can fit various shells, the 918-0019-04 is specifically calibrated for the thermal requirements and shell diameters of Copeland Scroll and Reciprocating models. Always verify the compressor diameter and voltage requirements before installation.

Is the 70W power rating sufficient for extreme winter conditions?
Yes, 70 Watts is the standard industrial rating for mid-to-large tonnage compressors to keep oil viscosity within the manufacturer’s specified range without causing carbonization or oil breakdown.

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.