R410a Refrigerant

Important facts of R410A Refrigerant

R410A is the most preferred refrigerant to replace R22 in home air conditioners.It is azeotropic and is an equal blend of HFC-32 and HFC-125.

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Differences between R410A and R22 Refrigerant

• It operates in same temprature range as R22.
• It opeartes at 60 percent higher pressure than R22.
• It uses POE oil instead of Mineral oil as in the case of R22.
• R410a is HFC (hydrofluorocarbon) while R22 is HCFC (hydrochlorofluorocarbon ).
• R410A has zero ozone depletion potential becuase it does not have any chlorine atom while R22 is not safe for ozone layer because of the presence of chlorine.
• Temprature glide of R410A is .2 while that of R22 is zero.
• R410A has GWP of 1975 while that of R22 is 1700.
• R410A is more energy efficient(about 5 percent) than R22.

Different AC company markets R410A under different brand names

• Carrier brands it as Puron
• Dupont brands it as Suva 9100
• Rheem brands it as ProZone
• Lennox brands it as Environ
• Sanyo brands it as Cooleron

Some points to remember while doing leak testing for R410A

• It is illegal to vent R410A in air as it is protected under clean air act.
• Repair any leak that is over 15 percent of annual system charge.
• Ultrasonic and electronic leak detectors are good for testing any R410A leaks but avoid Halide leak detectors.

Take care of below points while charging or evacuating R410A air conditioners

• Recovery cylinders are gray(with yellow top).They must be rated for 400 PSI.Never fill these cylinders to maximum.
• While charging R410A cylinder must be inverted and refrigerant must enter as liquid inside the AC unit.
• R410A Cylinder color is pink.

Points to remember while replacing old R22 AC with R410A

• Compressor,evaporator coil and expansion valves must be changed while replacing old R22 systems with R410A becuase R410A operates at higher pressure than R22 and so puts different kind of demands on AC unit.
• Also remember to remove all traces of mineal oil.
• Use only driers rated for R410A.
• Replace the old AC pressure lines (copper).