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Tecumseh approves R404A replacements

Compressor manufacturer Tecumseh has approved further alternative refrigerant replacements for R404A, including HCs and HFOs.

In follow-up to the document Tecumseh issued in June 2015 regarding recommended refrigerants, the company has continued to test various low GWP options to determine suitable replacements for R404A and R134a.

Following this, the company has approved R449A and R452A as acceptable alternatives to refrigerant R404A for commercial refrigeration equipment employing the use of remote condensing units.

However, due to the higher discharge temperatures prevalent with R449A, compressors used in the above mentioned applications must maintain strict compliance with the requirements outlined in the relevant Tecumseh Policy Bulletins and Application Guidelines.

Tecumseh is in the process of releasing a full line of R449A compressors and associated condensing units for Low, Medium and High temperature commercial refrigeration applications.

Specific to the United States, the use of refrigerant R452A in new remote condensing units is still under review by the U.S. EPA and is not approved as a replacement for R404A in these applications.

For self-contained / stand-alone commercial refrigeration equipment with capacities less than ½ HP, Tecumseh continues to support HC refrigerant R290 (Propane) as the preferred choice.

However, because R290 is classified as an “A3” (highly flammable) refrigerant, it states that charge limitations and safety requirements must be taken into consideration.

Typical applications for R290 include beverage coolers, reach-ins, vending equipment and, commercial refrigerators and freezers.

Tecumseh has also approved R513A as an acceptable alternative to R134a and requires that compressors meet the guidelines outlined in the relevant Tecumseh Policy Bulletins and Application Guidelines.

Refrigerant R450A is still being reviewed by Tecumseh.

For all self-contained / stand-alone commercial refrigeration equipment applications, Tecumseh has approved R449A and R452A as acceptable alternatives to refrigerant R404A.

However, due to the higher discharge temperatures prevalent with R449A, compressors used in the above mentioned applications must maintain strict compliance with the requirements outlined in the relevant Tecumseh Policy Bulletins and Application Guidelines.

In addition, refrigerants R449A and R452A are non-azeotropic mixtures with significant temperature glide that must be accounted for within the application.

Specific to the United States, the use of refrigerants R449A and R452A in new self-contained /stand-alone equipment is still under review by the U.S. EPA and is not approved as a replacement for R404A in these applications. The exception is low temperature applications where the U.S. EPA has listed R449A as SNAP approved.

 

 

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