Tuesday, March 30, 2010
There are three distinct design differences between and R-22 and R-410A compressor:
* Different Oil: Because mineral oil, normally used in R-22 compressors, is not miscible with HFC refrigerants such as R-410A, Copeland uses a synthetic Polyol Ester Oil (POE) in R-410A approved compressors.
* Reduced Compressor Displacement: A pound of R-410A has approximately the same heat carrying capacity relationship to R-22 as R-22 has to R-12, therefore, the compressor displacement has to be reduced approximately 40% for a given motor horsepower. Using a compressor designed for R-22 to pump R-410A would overload the motor and cause protector trips.
* Higher Shell Burst Pressure Requirement: At any given saturated temperature, R-410A has approximately 60% higher pressure than R-22, which require compressor shells to meet this higher pressure requirement.
Monday, March 29, 2010
Compressor Modulation Offers Efficiency, Reliability, and Comfort - Feature Articles - Extra Edition - Air Conditioning, Heating & Refrigeration NEWS
Friday, March 26, 2010
Monday, March 22, 2010
Friday, March 12, 2010
Where possible, always select a thermal expansion valve for the actual operating conditions rather than nominal valve capacities. To deter...
These are cost-effective solutions for R22, R407C, R134a and R404a applications.
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