Copeland 918-0043-01 Crankcase Heater

For veteran technicians managing Copeland Scroll compressors, the Copeland 918-0043-01 Crankcase Heater is a field-essential component designed to mitigate refrigerant migration during off-cycles. This belt-type heater (belly band) provides a consistent 70 Watts of thermal output at 480 Volts, ensuring the oil sump temperature remains above the system's dew point. By maintaining compressor oil viscosity in cold ambient conditions, it prevents liquid slugging—the primary cause of catastrophic mechanical failure upon startup. This genuine Emerson Copeland heater features a 48-inch lead length for easy routing to the control box and is specifically engineered for ZB, ZF, ZO, ZP, ZR, and ZS series compressors. The wrap-around design ensures maximum heat transfer to the lower housing, protecting internal components and ensuring reliable lubrication. This high-voltage 480V crankcase heater is built for the rigors of industrial refrigeration and commercial HVAC applications where precise thermal management is non-negotiable.

• System Reliability: Actively prevents liquid refrigerant from condensing in the crankcase, protecting the compressor motor and valves from damage.
• Optimized Lubrication: Maintains oil at the correct temperature for immediate flow, reducing friction and wear on scroll sets and bearings.
• Technical Precision: Rated for 480 Volts and 70 Watts, providing controlled heating without the risk of carbonizing the oil.
• Extensive Compatibility: Fits a wide range of Copeland Scroll models, including common refrigeration and air conditioning units.
• Professional Design: Includes 48" Leads for versatile installation across various chassis sizes and electrical panel locations.

Common Questions & Answers

How do I ensure the best thermal contact during installation?
Position the belly band heater below the compressor dimples and tighten the screw over the vertical weld seam. This prevents wire pinching and ensures the 1-pound assembly remains flush against the shell for efficient heat transfer.

Can this heater be wired to run continuously?
While often wired to stay energized whenever the disconnect is closed, technicians should refer to the unit's schematic. Using the 918-0043-01 ensures the resistance (approx. 3290 ohms) is correctly matched for 480V AC lines.

Is this part compatible with non-Copeland brands?
This is an OEM part designed for Copeland compressors. While belt heaters are versatile, verifying the diameter and voltage is critical to prevent overheating or poor fitment on other manufacturers’ housings.

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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.