This video is to help new technicians learn the basics of checking the charge on an air conditioner. The EPA requires all persons handling refrigerant to be EPA 608 certified. Please do not attempt to charge a unit if you are not certified or a student working under the supervision of a qualified trainer.... ( read more )
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Refrigerant charge is an important factor in the proper operation of a condensing unit. If the charge is incorrect, the system may not operate efficiently and may even cause damage to the equipment. The sub-cooling method is a reliable way to check the refrigerant charge of an R-410a condensing unit. The sub-cooling method involves measuring the temperature difference between the refrigerant leaving the condenser and the refrigerant entering the evaporator. If the difference
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