Daikin-McQuay 074513201 Crankcase Heater

The Daikin-McQuay 074513201 Crankcase Heater is a critical OEM replacement part designed for industrial and commercial HVAC systems, specifically to protect compressors during off-cycles. Operating at 120V and 70 Watts, this heater maintains an optimal temperature within the crankcase housing, preventing refrigerant migration and subsequent oil dilution. By keeping the lubricant at a temperature above the refrigerant saturation point, it ensures proper viscosity and immediate lubrication upon startup, mitigating the risk of mechanical binding or slugging in Daikin-McQuay compressors. This 70W heater is a direct technical substitute for legacy part numbers 02-3653-02S, 018-0043-07, and 018-0057-07, offering a precise fit for maintenance technicians refurbishing existing chillers or rooftops. Its robust construction is engineered to withstand the thermal cycling typical of high-demand HVACR environments, providing a reliable solution for heavy-duty compressor winterization and cold-weather operation.

• Prevents Refrigerant Migration: Ensures refrigerant does not condense/mix with oil when the system is idle.
• OEM Compatibility: Replaces McQuay 074513201 and legacy series 018-0072-07 for seamless integration.
• Optimized Heat Output: Provides 70W of consistent warmth to protect internal compressor components.
• Reduced Mechanical Wear: Enhances bearing life by maintaining proper oil oil-to-refrigerant ratios.
• Standard Electrical Specs: Operates on common 120V circuits for broad industrial application.

What happens if the crankcase heater fails?
A failure leads to refrigerant accumulation in the oil, causing foaming and potential compressor failure during the next startup due to lack of lubrication.

Is this part compatible with non-Daikin compressors?
While designed for Daikin-McQuay specifications, compatibility depends on crankcase diameter and electrical requirements. Confirm specs before cross-referencing.

How do I test the 074513201 heater?
Verify the resistance using a multimeter; at 120V and 70W, you should expect to see approximately 205 ohms of resistance if the element is intact.

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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.