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Usefull Technical Data For Air Conditioning and Refrigeration Approximate Pressure Control Settings Application     Temp Range (ºF)     Evaporator TD (ºF)     REF Air Conditioning Frequently Asked Questions Air Conditioning FAQ A/C Systems and Service Refrigerants Contamination EPA A/C Organizations A/C Systems and Service What is an air purge system? An air-purge I heard a story about HC-12a / OZ-12, are they flammable refrigerants? And what is the full story? According to the EPA HC-12a and OZ-12 brand hydrocarbon refrigerant blends are flammable refrigerants.  Their primary components are hydrocarbons, which are flammable substances like propane and Factors Affecting The Speed At Which A Pump Can Dehydrate A Refrigerant System Several factors influence the "pumping speed" of a high vacuum pump, and thus the time required to remove all moisture from a refrigerant system. Some of the most important are: the cubic feet of the Air Conditioning Frequently Asked Questions "The Full Story" Air Conditioning FAQ A/C Systems and Service Refrigerants Contamination EPA A/C Organizations A/C Systems and Service What is an air purge system? An air-purge