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Phase-out The ending of all production and consumption of a chemical controlled under the Montreal Protocol. Piping All pipes or tubes (including hoses, bellows, fittings, or flexible pipes) for interconnecting the various parts of a refrigerating system. Power It’s the time rate of which work is done or energy is transferred. Pressure relief device A pressure relief valve or bursting disc device designed to relieve excessive pressure automatically. Pressure relief valve A pressure actuated valve held shut by a spring or other means and designed to relieve excessive pressure automatically by starting to open at a set pressure and re-closing after the pressure has fallen below the set pressure. Push-pull method A method for recovering and recycling refrigerant from a system using a negative pressure (suction) on one side to pull the old refrigerant out and pumping recycled refrigerant vapour to the other side to push the old refrigerant through the system. Reclaim Processing used refrigerants to new product specifications. Chemical analysis of the refrigerant determines that appropriate specifications are met. The identification of contaminants and required chemical analysis both are specified in national and international standards for new product specifications. Reclamation Reprocessing and upgrading of a recovered controlled substance through mechanisms such as filtering, drying, distillation and chemical treatment in order to restore the substance to a specified standard of performance. Chemical analysis is required to determine that appropriate product specifications are met. It often involves processing off-site at a central facility. Recovery The collection and storage in an external container, of controlled substances from machinery, equipment, containment vessels, etc., during servicing or prior to disposal without necessarily testing or processing it in any way. Recycling Reducing contaminants in used refrigerants by separating oil, removing non- condensables and using devices such as filters, driers or filter-driers to reduce moisture, acidity and particulate matter. The aim of recycling is to reuse the recovered refrigerant and normally involves recharge back into equipment and it often occurs on-site. Refrigerant A fluid used for heat transfer in a refrigerating system, which absorbs heat at a low temperature and a low pressure and rejects heat at a higher temperature and a higher pressure usually involving changes of the state of the fluid. Refrigerant detector A sensing device which responds to a pre-set concentration of refrigerant gas in the environment. Refrigerating system A combination of interconnected refrigerant-containing parts constituting one closed refrigerant circuit in which the refrigerant is circulated for the purpose of extracting and rejecting heat (i.e. cooling, heating). Refrigeration It is the process of lowering the temperature of substance or a space to a desired temperature based on type of application. Retrofit The upgrading or adjustment of equipment so that it can be used under altered conditions; for example, of refrigeration equipment to be able to use an alternative refrigerant in place of a CFC, HCFC or HFC. Saturated vapour pressure The maximum vapour pressure of a substance at a given temperature when accumulated over its liquid state in a confined space. 148 GlossaryPDF Image | Manual for Refrigeration Servicing Technicians
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