Lennox 11A75 Compressor

The Lennox 11A75 is a heavy-duty 5 Ton reciprocating compressor designed for high-demand commercial HVAC applications. Operating on 460V 3-phase power, this unit is engineered for reliable performance in Lennox rooftop units and split systems. As the OEM direct replacement for Lennox 65G79 and 65G7901, it ensures seamless integration with existing refrigerant lines and electrical connections, minimizing downtime during field installation. This compressor maintains high volumetric efficiency and robust thermal management, making it a critical component for restoring peak cooling capacity in industrial environments. Technicians should verify LRA (Locked Rotor Amps) and RLA (Rated Load Amps) specifications against the system nameplate to ensure proper contactor and circuit breaker sizing. Its durable internal valve design is built to handle high compression ratios and liquid slugging risks common in older R-22 or retrofit R-407C systems.

Technical Specifications & Key Benefits

• Direct OEM Substitute: Specifically engineered to replace Lennox 65G79 and 65G7901 models without mounting modifications.
• High-Voltage Efficiency: Optimized for 460V / 60Hz / 3-Phase power supplies to reduce current draw and heat generation.
• 5-Ton Cooling Capacity: Delivers consistent 60,000 BTU/hr performance for large-scale commercial air conditioning systems.
• Durable Construction: Built to withstand the rigors of continuous operation in high-ambient temperature conditions.
• Commercial Grade Reliability: Features internal overloads and high-pressure protection to safeguard the motor during extreme cycles.

Common Contractor Questions

Is the Lennox 11A75 compatible with multiple refrigerants?
While originally designed for specific mineral oil or POE configurations, this compressor is typically utilized in R-22 or R-407C systems. Always verify the oil type and system requirements before charging.

Does this unit require a specific mounting kit?
As a direct replacement for 65G79, it utilizes the standard footprint for Lennox commercial chassis, though new mounting grommets are recommended for vibration isolation.

What are the electrical requirements for installation?
This is a 3-phase 460V compressor. Ensure the phase monitor and contactors are tested for proper voltage balance to prevent premature motor failure.

This item must ship via truck. Please contact us for freight quote.

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.