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Dee Development Engineers Ltd (DDEL), started in 1983 in Faridabad, Haryana, India. We are engaged in Design, Engineering & Manufacturing of Prefabricated Piping Systems and Pipe Fittings. We are equipped with a state of art production facility capable of 33,000 MT Piping Fabrication and 3000 MT of Pipe Fitting annually. DDEL caters to Multinational Power Generation Equipment OEMs, EPC Contractors in Power Sector, Oil & Gas, Petrochemicals.
Part 2 of “How to properly charge up an auto R134a AC system” using pressure gauge and off the shelf 12 ounce R134a refrigerant.
Note about charging Liquid (can upside down) versus Vapor (can right side up):
The freon can should be upright so that refrigerant “vapor” is drawn into the low side. Remember that the Low side, also known as the suction side, normally operates as a “Low Pressure Vapor” state that is drawn directly into the compressor. You don’t want to “slug” the compressor by inverting the can and adding freon in the liquid state. A caveat to the above statement is that sometimes it may be necessary to invert the FIRST can(initial charge) for a few seconds at a time to “prime” the system with freon so that the compressor will engage. But you should never charge an AC system with pure liquid refrigerant. The compressors job is to “compress” refrigerant vapor coming from the Low side. The compressor is not designed to compress liquid and can be damaged if too much liquid is put into the low side.