| A | B |
|---|
| Active Recovery | Recoving refrigerant with the use of a recovery machine that has its own built-in compressor. |
| Air-Conditioning and Refrigeration Institute (ARI) | A non-profit association that regulates equipment manufacturers and rates the capacity of equipment. |
| Alkylbenzene | A popular synthetic lubicant that works best with HCFC-based refrigerant blends. This lubricant can be used with CFC and HCFC refrigerants. |
| Azeotropes | A refrigerant mixture is a blend of two or more refrigerants that can still separate into individual refrigerants. |
| Chlorofluorocarbon (CFC) | Those refrigerants thought to contribute to the depletion of the ozone layer. |
| Department of Transportation (DOT) | The governing body of the U.S. goverment that makes the rules for transporting items, such as volatile liquids. |
| Environmental Protection Agency (EPA) | A branch of the federal government dealing with the control of ozone-depleting refrigerants and other chemicals and the overall welfare of the environment. |
| Fractionation | When a zeotropic refrigerant blend phase changes, the different components in the blend all have different vapor pressures. This causes different vaporization and condensation rates and temperatures as they phase change. |
| Global Warming | An earth-warming process caused by the atomosphere's abruption of the heat energy radiated from the earth's surface. |
| Global Warming Potential (GWP) | An index that measures the direct effect of chemicals emitted into the atmosphere. |
| Greenhouse Effect | the trapping of the sun's warmth in a planet's lower atmosphere due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface. |
| Hydrocarbon (HC) | Organic compounds containing hydrogen and carbon found in many heating fuels. |
| Hydrochlorofluorocarbon (HCFC) | Refrigerants containing hydrogen, chlorine, fluorine, and carbon, thought to contribute to the depletion of the ozone layer, although not to the exent of chloroflurocarbons. |
| Low Loss Fitting | A fitting that is fastened to the end of a gage manifold that allows the technician to connect and disconnect gage lines with a minimum of refrigerant loss. |
| Montreal Protocol | An agreement signed in 1987 by the United Sates and other countries to control the release of ozone-depleting gases. |
| Ozone | A form of oxygen (O3) A layer of ozone is in the stratosphere that protects the earth from cetain of the sun's ultraviolet wavelengths. |
| Ozone Depletion Potential (ODP) | A scale used to measure how much a substance will deplete stratospheric ozone. |
| Passive Recovery | Recovering refrigerant with the use of the refrigeration system's compressor or internal vapor pressure. |
| Piercing Valve | A device that is used to pierce a pipe or tube to obtain a pressure reading without interrupting the flow of fluid. Also called a line tap valve. |
| Polyalkylene Glycol (PAG) | A popular synthetic glycol-based lubricant used with HFC rerigerants, mainly in automotive systems. This was the first generation of oil used with HFC refrigerants. |
| Polyol Ester (POE) | A very popular ester-based lubricant often used in HFC refrigerant systems. |
| Refrigerant Reclaim | To process refrigerant to new product specifications by means which may include distillation. It will require chemical analysis of the refrigerant to determine that appropriate prodcut specifications are met. This term usually implies the use of processes or procedures available only at a reprocessing or manufacturing facility. |
| Refrigerant Recovery | To remove refrigerant in any condition from a system and store it in an external container without necessarily testing or processing it in any way. |
| Refrigerant Recycle | To clean the refrigerant by oil separation and single or multiple passes through devices, such as replaceable core filter driers, which reduce moisture, acidity, and particulate matter. This term usually applies to procedures implemented at the job site or at a local service shop. |
| Schrader Valve | A valve similar to the valve on an auto trie that allows refrigerant to be charged or discharged from the system. |
| Technician | A person who performs maintenance, service, testing or repair to air-conditioning or refrigeration equipment. **NOTE: The EPA defines this person as someone who could reasonably expected to release CFC's and HCFC's into the atmposphere. |
| Temeprature Glide | When refrigerant blend has different temperatures when it evaporates and condenses at a single given pressure. |
| Total Equivalent Warming Impact (TEWI) | A global warming index that takes into accoundboth the direct effects of chemicals emitted into the atmosphere and the indirect effects caused by system inefficiencies. |
| Ultraviolet | Light waves that can only be seen under a special lamp. |
