Stream – State of the art semi-hermetic piston technology
Stream – State of the art semi-hermetic piston technology

Emerson Climate Technologies has started the production of a family of semi-hermetic reciprocating compressors: Stream. Stream provides the industry with a portfolio of technologies: a range of 4 and 6 cylinder compressors for today’s most commonly found HFC refrigerants, a range of Digital semi-hermetic compressors for simple continuous capacity modulation as well as a range designed for CO2 transcritical applications. All models are fitted with CoreSense™ Diagnostics that provides advanced compressor protection and diagnostics.

AACHEN, GERMANY, January 9, 2012 – Emerson Climate Technologies is starting the new year 2012 with great news: Stream, the new range of semi-hermetic Copeland® brand compressors for commercial and industrial applications, is now released for production. It is the state-of-the-art technology that results from a continuous investment in R&D and is the answer to the challenges in the commercial sector where refrigeration systems are required to be efficient, sustainable, quiet and environmentally responsible.

Efficiency choice whatever the refrigerant
Emerson’s engineers combined existing design techniques with new advanced technologies to create a new 4 and 6-cylinder range of 16 models for HFC refrigerants. Eight of them have Digital continuous modulation capabilities. They cover cooling capacities from 33 to 80 kW medium temperature, 11 to 28 kW low temperature with R404A and can be used also with R134a as well as R407A/C while being the most efficient compressors available. Having the choice between several refrigerants for the same compressor without any compromise on performance is an important and unique benefit: this was made possible by the Emerson-owned and patented Discus® valve plate technology. Compared to other semi-hermetic reciprocating compressors, this technology allows 10% better performance with R404A.

Choice between two solutions of capacity modulation
A way to reduce energy consumption and CO2-emissions is capacity modulation. For the first time, contractors or installers can choose between two different modulation technologies: inverter technology or digital modulation. All Stream compressors are released for inverter applications. In addition Stream Digital models provide an alternative means of continuous modulation. Digital modulation is the most simple and precise method of capacity control and helps to contain applied costs associated with modulation. The compressor always runs at constant speed which resolves the challenges related to oil return, mechanical and electrical stress on the system.

Quietest on the market
Stream is one of the quietest reciprocating compressors on the market. Design efforts have led to sound reduction of up to 7dBA compared to previous generation of compressors depending on models and application. Compressor quiet operation is not always sufficient for sound sensitive such as urban application. As a result a new sound shell can be fitted on Stream compressors and provides an additional 15dBA attenuation.

Stream for natural refrigerants
In addition to the HFC models 3 models for R744 (CO2) transcritical applications cover cooling capacities from 20 to 37 kW. This is the ideal solution for medium temperature cascade and booster systems when combined with Emerson’s ZO scroll range for CO2 subcritical. These CO2 Stream models are characterized by a design pressure of 135 bar and are released for operation with frequency inverters. Refrigerant flow and heat transfer have been optimized for best performance.

An intelligent compressor
All compressor models of the Stream family feature CoreSense™ Diagnostics, an electronic module that provides advanced compressor protection and diagnostics benefits for improved system reliability, reduced service costs and increased equipment uptime. With CoreSense™ technology, service engineers can now diagnose system-related problems faster or even before they occur in order to keep refrigeration systems in optimum condition over their entire lifetime. The diagnostics module stores compressor asset and advanced runtime information. An individual compressor monitoring is possible, too.

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About Emerson
Emerson (NYSE: EMR), based in St. Louis, is a global leader in bringing technology and engineering together to provide innovative solutions to customers through its network power, process management, industrial automation, climate technologies, and appliance and tools businesses. Sales in fiscal year 2011 were US$ 24.2 billion. For more information, visit

About Emerson Climate Technologies
Emerson Climate Technologies, a business of Emerson, is the world’s leading provider of heating, ventilation, air conditioning and refrigeration solutions for residential, industrial and commercial applications. The group combines best-in-class technology with proven engineering, design, distribution, educational and monitoring services to provide customized, integrated climate control solutions for customers worldwide. Emerson Climate Technologies’ innovative solutions, which include industry-leading brands such as Copeland Scroll™ and Alco Controls, improve human comfort, safeguard food and protect the environment. For more information, visit

Achim Frommann
Media, Communication & Relations
Emerson Climate Technologies GmbH,
Pascalstr. 65, 52076 Aachen, Germany
T: +49 (0) 2408 929 0
F: +49 (0) 2408 929 570