The temperature glide for R-410A is less than .3 degrees Fahrenheit over air conditioning and refrigerating operating ranges.
Polyol Ester (POE) Can be irritating to the skin, Is hygroscopic, Has improved heat transfer characteristics over mineral oils.
The low pressure control on R-410a systems will open at 50 psig.
Compression ratio is calculated as absolute discharge pressure divided by absolute suction pressure.
Both suction and discharge pressures of R-410a system are 40% to 70% higher than R-22 systems.
HCFC-22 is scheduled for total phase out in the year 2030.
R-410a Is more efficient than R-22, using less energy, therefore it has a lower TEWI.
If a R-410a system develops a leak the remaining refrigerant is OK to used because R-410a has a low fractionation rate.
When charging a R-410a system that uses a thermostatic expansion valve, proper charge can be determined by measuring sub cooling.
If you are in the Philadelphia area, and would like to earn your R410-A Certification, Johnstone Supply Philadelphia will be holding a class April 20, 2011. Feel free to contact me for sign up sheet at:
michael.davis@johnstonesupply.com
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