Emerson has produced a guide to using Copeland compressors and Alco valves, controls and components with low GWP HFO refrigerants and HFO blends.
The 84-page pdf product guide 2016 HFO/HFO blends, published by Emerson Climate Technologies GmbH, is currently available through the website of the Ukrainian air conditioning and refrigeration distributor Planetaklimata. It covers the use of Copeland and Alco products with the HFO R1234ze and the blends R448A, R449A, R450A and R513A.
The above blends were all approved for use by Emerson this year in Copeland Scroll and reciprocating compressors and included within Emerson’s online selection software.
R449A is a replacement for R404A and R507A. A blend of R32, R125, R1234yf and R134a, it has a GWP of 1397 and carries a non-flammable and non-toxic A1 safety classification.
R448A is Honeywell’s non-flammable, non-toxic A1 refrigerant to replace R404A, sold under the trade name Solstice N40. It uses the same components as DuPont’s R449A with the addition of a small amount of R1234ze(E). GWP is around 1273.
Honeywell’s R450A (Solstice N13) and DuPont’s R513A (Opteon XP10) are replacements for R134a. R513A is a binary mixture of R134a and R1234yf with a GWP of around 630 and an A1 ASHRAE safety classification. R450A is a non-flammable blend of R134a and HFO1234ze(E), It has a GWP of about 601.
Emerson says the release of standard products with these new refrigerants follows compatibility testing and tests on the required modification/consideration in order to provide optimum performance. This included consideration to the operating conditions of components using the new refrigerants in comparison with HFC refrigerant in term of pressure, temperature, enthalpy, etc; flow capacity selection of valves based on the thermodynamic properties of the new refrigerants; software modifications in electronic devices as required.
Importantly, the guide also includes the necessary corrections to the TRV superheat settings required for use with the new gases.
