Lennox 93M11 Crankcase Heater

The Lennox 93M11 Crankcase Heater is a critical OEM replacement component designed to maintain compressor reliability in demanding commercial and industrial HVACR environments. Operating at 480 Volts with a 70 Watts power rating, this belt type crankcase heater provides consistent thermal energy to the compressor base, effectively preventing refrigerant migration and neutralizing the risk of oil dilution during off-cycles. Engineered as a wrap-around heating element, it offers a versatile 7-9 inch diameter range (specifically 6.58" to 8.93") to ensure a snug, high-efficiency fit on various compressor housings. The inclusion of 14-inch leads with 1/4" insulated lead end terminations allows for flexible field wiring and rapid integration into existing control circuits. By keeping the lubricant at an optimal temperature, the 100499-08 model mitigates mechanical wear during cold starts, safeguarding the internal assembly from slugging and ensuring long-term system performance in high-voltage applications.

Key Benefits

• Prevents Refrigerant Migration: Stops liquid refrigerant from mixing with oil during standby, reducing the potential for compressor damage.
• Optimized Heat Transfer: The 70W wrap-around heater design ensures even thermal distribution across the compressor housing.
• Wide Compatibility: Adjustable belt fits compressors with a 7"-9" diameter, making it a versatile stock item for service vans.
• Durable Construction: Built to withstand industrial conditions, ensuring stable 480V HVAC heater operation in various ambient temperatures.

Common Questions

Which compressor models are compatible with the Lennox 93M11?
This unit is designed for Lennox and Allied equipment, specifically matching models like the HS29-072-3 and various KCA series units. Its adjustable diameter accommodates most compressors within the 6.6" to 8.9" range.

What is the standard lead length for installation?
The heater comes equipped with 14-inch leads, providing ample length for routing to the electrical cabinet or terminal block in most commercial split systems and rooftop units.

Does this heater require a specific voltage?
Yes, this is a 480V crankcase heater. It is essential to verify that the power supply matches this rating exactly to ensure correct wattage output and steady warmth without damaging the heating element.

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.