Copeland 918-0056-06 Heater

The Copeland 918-0056-06 Crankcase Heater is a critical field-service component designed for high-performance thermal management in commercial refrigeration and HVAC systems. Engineered as a 120V 120W wrap-around heater (belly-band style), this unit provides precise wattage to the compressor base, effectively preventing refrigerant migration and oil dilution during the off-cycle. By maintaining the crankcase at a temperature higher than the evaporator, it eliminates the risk of liquid refrigerant slugging at startup—a leading cause of catastrophic valve and bearing failure. Specifically optimized for Copeland ZR252 compressors and various hermetic models, this 28.75-inch lead heater features a rugged, easy-to-install design that ensures horizontal, flush contact with the shell for maximum heat transfer. For veteran techs, this is the standard for protecting expensive scroll and reciprocating hardware in applications exposed to cold ambient conditions where oil viscosity and pump-down practicality are critical concerns. This OEM compressor part ensures your system meets manufacturer specs for low-ambient operation.

• Protects Compressor Integrity: Maintains oil temperature to prevent refrigerant from condensing in the crankcase, significantly reducing wear on internal components.
• Optimized 120W Output: Specifically calibrated to provide sufficient heat without carbonizing the oil or overheating the compressor shell.
• Fast Installation: The flexible wrap-around design with a secure fastening clip allows for quick field replacement without breaking the refrigerant circuit.
• Precision Fit: Designed for a standard 120V power supply, featuring 28-inch leads for versatile routing to the contactor or control box terminals.
• Broad Compatibility: A direct replacement part for ZR250 and ZR252 compressor series, ensuring reliable cold-weather performance.

How do I verify the heater is functioning correctly?
Disconnect the leads and perform a resistance (ohms) check; a functional 120W/120V heater should show a measurable resistance value, while "OL" indicates a broken element. You can also verify amperage draw at the contactor while the compressor is in the off-cycle.

Where exactly should the heater be positioned on the shell?
The heater must be installed as low as possible on the compressor base, below the internal oil level, but approximately 2 inches above the mounting plate. Ensure it does not overlap any bottom welds for maximum surface contact.

Can I test the heater before installing it?
No. Never apply power to a wrap-around heater in free air. It is designed to dissipate heat into the compressor shell; energizing it while uninstalled will cause it to burn out almost instantly.

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.