Refrigerant R-410A, is a zeotropic but near-azeotropic mixture of difluoromethane (CH2F2, called R-32) and pentafluoroethane (CHF2CF3, called R-125) that is used as a refrigerant in air conditioning and heat pump applications.
Precaution
R-410A cannot be used in R-22 service equipment because of higher operating pressures (approximately 40 to 70% higher).While R-410A has negligible fractionation potential, it cannot be ignored when charging.To avoid fractionation as the system is charged and for optimum system performance, the correct procedure must be used, depending on the type of cylinder. If a cylinder with dip-tubes is used, R-410A can be charged while the cylinder is upright. If the cylinder doesn't have dip-tubes, it should be kept upside-down to charge with liquid, not vapor, from the cylinder. The procedure, then, is to fill very slowly, the valve restricting output, in order to avoid slugging the compressor with liquid.
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