New compressor displacement provides more flexibility in designing systems and helps to reduce costs.

Originally published: 3/14/2023

Emerson announced the largest displacement in its Copeland transcritical CO2 semi-hermetic compressor lineup by releasing the 4MTLS28ME. Copeland’s transcritical CO2 semi-hermetic lineup now extends capacity to 303 kBTU/hour (90 kWh) at 20 degrees Fahrenheit (-7 degrees Celsius) saturated suction, 1,290 psi (89 bar) discharge pressure, and 95 degrees Fahrenheit (35 degrees Celsius) gas cooler outlet. The Copeland transcritical CO2 semi-hermetic compressor modulates from 30 to 60 hertz hertz to allow for precise load matching and smooth system operation.   

As the U.S. commercial refrigeration market is poised for a surge in the use of CO2 (R-744) to achieve sustainability and regulatory compliance goals, this new transcritical CO2 semi-hermetic compressor offering helps food customers to meet those goals. 

This product expands Emerson’s integrated CO2 portfolio — including compressors (scroll and semi-hermetic), controls, case controls, drives and valves. The addition of this larger transcritical compressor means that original equipment manufacturers (OEMs), consultants, contractors, end users and wholesalers have more flexibility in designing transcritical CO2 booster systems. The expanded offering helps to reduce the number of compressors needed on a transcritical CO2 rack in some applications, which can lower initial costs for an end user while helping them to meet sustainability and compliance objectives. 

“This compressor has best-in-class performance in the industry, and the Copeland transcritical CO2 semi-hermetic portfolio overall has industry-leading low sound and vibration across the operating envelope. This means that end users benefit from lower noise levels, both in their store and in their neighborhood. OEMs benefit from lower sound attenuation, which results in less stress on the piping in the system. Excellent oil carry-over rates have also been validated with extensive testing to meet the Copeland standard,” continued Langenkamp. 

Copeland compressors have on-board compressor electronics protection, enabling technicians to quickly diagnose and repair systems through advanced motor performance monitoring and protection, diagnostics, power consumption measurements and communication capabilities. On-board compressor electronics also provide useful data for technicians during system installation, start-up and commissioning. In addition, Emerson’s extensive wholesaler network, with more than 1,000 Copeland-authorized wholesaler locations across North America, equips contractors with technical expertise when a refrigeration problem is detected.