Copeland 918-0518-01 Heater

The Copeland 918-0518-01 Crankcase Heater is a critical component for maintaining oil temperature and preventing refrigerant migration during compressor off-cycles. This insertion type heater is engineered for a precise fit in 4, 6, and 8-cylinder deep sump compressors, including Copelametic and Discus models. Operating at 240 Volts and delivering 200 Watts of heating power, it ensures that technical lubricants remain at the optimal viscosity required for immediate oil pressure development upon startup.

For the service technician, this heater features a 5 1/2" diameter with a 3 1/2" insertion length, facilitating a direct heat transfer to the oil reservoir. The assembly is built for durability in harsh environments, provided with a 32" conduit and 40" leads for flexible routing within the electrical cabinet. Utilizing an OEM crankcase heater like the 918-0518-01 helps prevent liquid slugging and mechanical failure, particularly in rooftop units or refrigeration systems exposed to low ambient temperatures where viscous oil can compromise bearing life.

• Direct Heat Transfer: The insertion design places the 200W element directly into the well for maximum thermal efficiency.
• Compressor Protection: Actively prevents refrigerant dilution of the oil, reducing the risk of bearing washout.
• Broad Compatibility: Verified for use with deep sump 4, 6, and 8-lead compressor configurations.
• Heavy-Duty Construction: Includes integrated conduit protection for long-term reliability in commercial HVACR applications.

Which compressor models is this heater compatible with?
This unit is designed specifically for Copeland Discus and Copelametic compressors that utilize a deep sump housing, common in 4D, 6D, and 8D series.

What is the benefit of an insertion heater over a bellyband style?
An insertion crankcase heater provides more efficient heat transfer by being submerged in a well within the sump, whereas bellyband heaters rely on conductive heat through the compressor shell.

Can this be used on a 208V circuit?
While it will physically fit, a 240V heater operated at 208V will produce significantly less wattage (approximately 150W), which may not be sufficient to maintain temperature in extreme cold.

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.