According to the above mentioned convention, No. Just a blog about refrigerant products & knowledge. The ASHRAE 34 and ISO 817 standards numbering system for refrigerant blends is also explained here. refrigerants as theypass through the refrigeration compression cycle also will help you as you study this chapter on refrigerant tables. HFC refrigerant blends (i.e. Designation of refrigerants: • Since a large number of refrigerants have been developed over the years for a wide variety of applications, a numbering system has been adopted to designate various refrigerants. For example HCFC-22 has one carbon atom. Since then ANSI/ASHRAE has adopted this numbering … Follow via messages; Follow via email; Do not follow; written 22 months ago by CRAIG D'SOUZA • 40: Follow via messages ; Follow via email; Do not follow; The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has developed certain conventions for use in naming different types of refrigerants. . Tables listing the refrigerant designations are included. Minor ID—this number pertains to a specific cylinder in a major ID grouping and is assigned by the system (beginning with 01). Refer to Chapter 31 summary ASHRAE numbering system. I want to hear from you. This standard has been revised by ISO 817:2014. Safety Code for Mechanical Refrigeration Purpose: " . of H atoms in R22: H + 1 = 2 => H = 1. A refrigerant is a substance or mixture, usually a fluid, used in a heat pump and refrigeration cycle.In most cycles it undergoes phase transitions from a liquid to a gas and back again. Explain the importance of refrigerant selection 2. No. In this case it is 3. Chilled water, brine, and glycol are used as cooling media in many refrigeration systems. Because the chemical names of typical refrigerants are long and complex, a method of referring to refrigerants by number was developed by DuPont. Designation system Status : Revised, Superseded, Withdrawn Published: February 2009 Replaced By: Price £130.00. A complete discussion, of the number designation and safety classification of the refrigerants, is presented in ASHRAE Standard 34-1989. Part of this chapter deals with a refrigerant (R-22) that will soon be phased out of production. The numbering of refrigerants is based on the original numbering system for fluorocarbons, which was developed in the 1930s by DuPont and adopted by the entire field in 1956. Substract 90 from 380 = 290. is used today as the numbering system for refrigerants. Follow via messages; Follow via email; Do not follow; written 22 months ago by CRAIG D'SOUZA • 40: Follow via messages ; Follow via email; Do not follow; The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has developed certain conventions for use in naming different types of refrigerants. ), Temperature and Humidity Play a Critical Role in Preserving Floral Arrangements, Take the Time to Thoroughly Inspect Compressors, War Stories of a Refrigeration Technician, Where To Install the Liquid Line Sight Glass, Ice Breaker: Evaporator Superheat Explained, Ice Breaker: Recording Refrigerant Usage; Observing Regulations, Ice Breaker: How to Select the Right Refrigerant. This number consists of a prefix made up of letters and a suffix made up of digits. • The fourth digit (thousands digit) equals the number of double bonds in the molecule. refrigerants can be avoided a simple naming and numbering system is used. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. Here is a brief explanation of the number system used after the dash (-): • The rightmost digit equals the number of fluorine atoms per molecule. . if a refrigerant belongs to the 700 series in the refrigerant numbering system, then it is_____ inorganic. Please Explain the Refrigerant Numbering System. Present a comparison between different refrigerants (Section 26.5) At the end of the lecture, the student should be able to: 1. List the criteria used in selecting refrigerants 4. Nb of F atoms is Z = 0 PRESERVING OUR ENVIRONMENT Refrigerant Recovery Training Manual Third Edition – September 2020 DRAFT v8.4 The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has developed certain conventions for use in naming different types of refrigerants. The basis of the designation of the refrigerant s fluids is based on a numbering system 1 – Pure Fluorocarbons (HFC) refrigerants and their blends The refrigerants are numbered with an R-, followed by the HFC-number, given by the rules of the fluorocarbons numbering system. Within three days of starting, Midgley and his collaborators had identified and synthesized dichlorodifluoromethane, now known as R-12.4 The first toxicity test was performed by exposing a guinea pig to the new com- pound. The numbering system was released for general use in 1956 and has become an industry standard. June 9, 2011 ZheJiang NOF Chemical Co. Ltd. manager@frioflor.com +86-150-8823-9500 / … The numbers are in chronological order of the refrigerant’s approval by ASHRAE. This definition system has been standardized by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). fraction . These naming conventions differ according to the type of refrigerant. Part of this chapter deals with a refrigerant (R-22) that will soon be phased out of production. Isomers are identified with lower cases (ex R 134a). . Organic compounds are numbered with the same system as Fluorocarbons. Safety classifications based on toxicity and flammability data are included. Isomers (molecule with the same chemical formula as another molecule but with a different chemical structure) are identified with a lower case letter after the number (for example, R-134a). The basic structure of the numbering system is the “chemical group” of refrigerant, followed by a dash (-) and a series of numbers and letters. Pour Paint. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. The task of finding a nonflammable refrigerant with good stability was given to Thomas Midgley in 1926.With his associates Albert Leon Henne and Robert Reed McNary, Dr. Midgley observed that the refrigerants then in use c… If zero, it is not normally written but assumed. R718 = water (molecular mass 18) This standard has been revised by ISO 817:2014. COVID-19 has boosted customer interest in IAQ solutions. R for refrigerant. Tagged with Inorganic compounds, numbering system, Refrigerant. Some were also highly reactive, resulting in accidents (e. g., leak, explosion) due to equipment failure, poor maintenance, or human error. Abstract . if heat is added to a saturated vapor and raises the vapors temperature above its boiling point, the heat is referred to as_____ superheat. Directly Related . Refrigerant numbers are based on the number of Carbon atoms in each molecule. An example of this can be seen in R-22. In short, the numbering system describes the chemical makeup of the refrigerant. HFC 22 is a methane based molecule, with only one carbon. Number followed by a letter " R", which means refrigerant. The numbering system was released for general use in 1956 and has become an industry standard. Blends having the same pure components but with different compositions are identified with upper cases (ex R 404A). Isomers (molecule with the same chemical formula as another molecule but with a different chemical structure) are identified with a lower case letter after the number (for example, R-134a). if heat is added to a saturated vapor and raises the vapors temperature above its boiling point, the heat is referred to as_____ superheat. Each refrigerant type is denoted by a different series. There are many different types of refrigerant used in our industry today. Differentiate between primary and secondary refrigerants 3. He can be reached at joe@koldcraft.com. Isomers are identified with lower cases (ex R 134a). This numbering system allows a technician or engineer to easily identify the chemical composition of a refrigerant. . Isomers are identified with lower cases (ex R 134a). This standardized numbering system was first developed by E.I. By closing this message or continuing to use our site, you agree to the use of cookies. Number followed by a letter " R", which means refrigerant. But that is also true of the much simpler numbers, such as HCFC 22. ASHRAE Refrigerant Designations. .to promote the safe design, construction, installation and operation of refrigerating systems." ISO 817:2005 provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. Visit our updated. BS ISO 817 can be used with other relevant safety standards such as BS ISO 5149, BS EN 60335-2-24 and BS EN 60335-2-40. This website requires certain cookies to work and uses other cookies to help you have the best experience. The R-# numbering system was developed by DuPontcorporation (which owns the Freontrademark) and systematically identifies the molecular structure of refrigerants made with a single halogenated hydrocarbon. DECODING SYSTEM OF CFC. R is our letter prefix and 22 is our numbered suffix. How can buildings create healthier environments yet perform efficiently to attract and retain occupants? List the criteria used in selecting refrigerants 4. Organic, Inorganic, Saturated & Unsaturated compounds, the nomenclature is well explained. Refrigerants. Each digit of the numbering system has its own significance in identifying the compounds that make up a refrigerant. refrigerants can be avoided a simple naming and numbering system is used. A complete discussion of the number designation and safety classification of the refrigerants is … Nb of H atoms is Y = 8 Isomers (molecule with the same chemical formula as another molecule but with a different chemical structure) are identified with a lower case letter after the number (for example, R-134a). Since then it has been adopted by ANSI/ASHRAE as part of Standard 34 (Number Designation and Safety Classification of Refrigerants). Refrigerant numbering system. The basic structure of the numbering system is the “chemical group” of refrigerant, followed by a dash (-) and a series of numbers and letters. However, as a service technician you maycontinue to come across it for years to come. Unfortunately, this has become slightly more complicated as new refrigerants have been introduced as they sometimes have more complicated chemical formulas and structures. For example R-402A and R-402B are made up of the same refrigerants, but with different percentages of each refrigerant. coolant. Series 700 is reserved for the inorganic compounds. A complete discussion of the number designation and safety classification of the refrigerants is … fraction . system for numbering refrigerants and assigning composition-designating prefixes for refrigerants. Abstract . Frioflor tells you what is the designation rule of refrigerant formula, what rule we should obey in giving refrigerant names. Below is an explanation of the various refrigerant groups. • The third digit from the right (hundreds digit) equals the number of carbon atoms minus one. Fluorocarbons, especially chlorofluorocarbons, became commonplace in the 20th century, but they are being phased out because of their ozone … R744 = CO2 (molecular mass 44), Filed under Refrigerant Knowledge Tables listing the refrigerant designations are included. of F atoms in R22: F = 2 Isomers (molecule with the same chemical formula as another molecule but with a different chemical structure) are identified with a lower case letter after the number (for example, R-134a). The ASHRAE 34 and ISO 817 standards numbering system for refrigerant blends is also explained here. Tables listing the refrigerant designations are included. . However, as a service technician you maycontinue to come across it for years to come. R is our letter prefix and 22 is our numbered suffix. The table is sortable by each of the following refrigerant properties (scroll right or reduce magnification to view more properties): Type/Prefix (see legends) ASHRAE number; IUPAC chemical name; molecular formula; CAS registry number / Blend Name This number consists of a prefix made up of letters and a suffix made up of digits. Refrigerants are identified by number. Scope: ". (It also contains one chlorine atom, but it is not identified in the numbering system. As an example, let us consider the refrigerant having R22 as its three digit nomenclature. Design, CMS, Hosting & Web Development :: ePublishing. Refrigerant numbers are based on the number of Carbon atoms in each molecule. The numbering system was released for general use in 1956 and has become an industry standard. • The second digit from the right (tens digit) equals one plus the number of hydrogen atoms per molecule. The ASHRAE 34 and ISO 817 standards numbering system for refrigerant blends is also explained here. Describe the numbering system used for designating refrigerants (Section 26.4) 5. All that is needed to describe it is a way to determine how many fluorine, chlorine, and … First digit = Number of double bonds (omitted if zero) Second digit = carbon atoms –1 (omitted if zero) Third digit = … Unfortunately, this has become slightly more complicated as new refrigerants have been introduced as they sometimes have more complicated chemical formulas and structures. PRESERVING OUR ENVIRONMENT Refrigerant Recovery Training Manual Third Edition – September 2020 DRAFT v8.4 if a refrigerant belongs to the 700 series in the refrigerant numbering system, then it is_____ inorganic. Working backwards from the right, the first number describes the number of fluorine atoms. The cylinder color code for R-134a is. Leave a comment, The basis of the designation of the refrigerants fluids is based on a numbering system, 1 – Pure Fluorocarbons (HFC) refrigerants and their blends. Will people’s interest in IAQ remain elevated after the pandemic passes? Safety Code for Mechanical Refrigeration Purpose: " . Nearly all of the historically used refrigerants were flammable, toxic, or both. So a cylinder number "90-07" identifies cylinder number 7 in the region identified by the number 90. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. If the molecular mass is less than 100, … • A suffix with a capital B and a number indicates the number of bromine atoms, when used. Learn in few minutes.Forever concept. Scope: ". ASHRAE numbering system for refrigerants. This standard numbering system was first developed by the DuPont company and was released for use in 1956. The meaning of the codes is as follows:[citation needed] The lowest temperature at which a lubricant will flow is called the. Please Explain the Refrigerant Numbering System. Differentiate between primary and secondary refrigerants 3. ISO 817:2005 provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. Isomers (molecule with the same chemical formula as another molecule but with a different chemical structure) are identified with a lower case letter after the number (for example, R-134a). All Rights Reserved BNP Media. Member Price £65.00. So why does HFO 1233zd(E) look like a secret code? An example of this can be seen in R-22. is used today as the numbering system for refrigerants. Refrigerants having the form R-4xxx are zeotropic blends of two or more refrigerants, while those with the form R-5xxx are azeotropes. Briefly, the method of designating a refrigerant … the separation of the individual refrigerants in a zeotropic blend during phase change is known as. So a cylinder number "90-07" identifies cylinder number 7 in the region identified by the number 90. ISO 817:2005 provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. These are numbers according to their molecular mass. Click to learn more. HFC-134a would have been referred to as R-134a. The number designations unambiguously indicate both the chemical compositions and structures. Many working fluids have been used for such purposes. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. By visiting this website, certain cookies have already been set, which you may delete and block. Explain the importance of refrigerant selection 2. BS ISO 817 provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. For the GWP of Refrigerants go to FS nr18: Selecting and Using GWP values for Refrigerants, Designation and safety classification of refrigerants. Designation of refrigerants: • Since a large number of refrigerants have been developed over the years for a wide variety of applications, a numbering system has been adopted to designate various refrigerants. Unfortunately, this has become slightly more complicated as new refrigerants have been introduced as they sometimes have more complicated chemical formulas and structures. indicates different percentages of refrigerants blended together. By closing this message or continuing to use our site, you agree to the use of cookies. In a zeotropic refrigerant blend, the refrigerant wit the the lowest boiling point boils first True Cylinder color-coding is a requirement for manufacturers, so technicians do not need to check labels. Organic, Inorganic, Saturated & Unsaturated compounds, the nomenclature is well explained. The ASHRAE 34 and ISO 817 standards numbering system for refrigerant blends is also explained here. It is intended to be used with other relevant safety standards such as ISO 5149, IEC 603352-24 and IEC 60335-2-40. Refer to Chapter 31 summary ASHRAE numbering system. You should familiarize yourself with the refrigerant numbers and names. Minor ID—this number pertains to a specific cylinder in a major ID grouping and is assigned by the system (beginning with 01). A suffix of a lower-case letter (a, b, c, etc.) NUMBERING OF REFRIGERANTS (i)For saturated hydrocarbons and their derivatives– three digit number First digit = C – 1 = one less than the ‘C’ atoms in the compound Second digit = H + 1=one more than the ‘H’ atoms in the compound The meaning of the codes is as follows: [ citation needed ] Refrigerant blends having the same pure components but with different compositions are … .to promote the safe design, construction, installation and operation of refrigerating systems." The numbering system was released for general use in 1956 and has become an industry standard. DuPont and released for general use in 1956. For example, 1233 + 90 = 1323. indicates an isomer. Safety classifications based on toxicity and flammability data are included. Tables listing the refrigerant designations are included. A suffix of an uppercase letter (A, B, C, etc.) You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. Present a comparison between different refrigerants (Section 26.5) At the end of the lecture, the student should be able to: 1. The numbering system consists of two components: Major ID—this number might pertain to a region or zone and is set by you. Please click here to continue without javascript.. Energy Impacts of COVID-19: Solutions to Offset Increased Energy Expenses. Because the chemical names of typical refrigerants are long and complex, a method of referring to refrigerants by number was developed by DuPont. The numbering system was released for general use in 1956 and has become an industry standard. In years past “R” was used instead of the refrigerant’s chemical group. Briefly, the method of designating a refrigerant … Mainly because the chemical is a bit more complicated. For each refrigerant an identifying number will be assigned to it. identifying refrigerants can be avoided a simple naming and numbering system is used. sky blue. Cf. They are produced by several different manufacturers and have numerous ways of identification. Refrigerants are identified by number. The cooling medium is often called a secondary refrigerant, because it obvi-ates extensive circulation of the primary refrigerant. The basis of the designation of the refrigerant s fluids is based on a numbering system 1 – Pure Fluorocarbons (HFC) refrigerants and their blends The refrigerants are numbered with an R-, followed by the HFC-number, given by the rules of the fluorocarbons numbering system. Become a member and SAVE 50% on British Standards. The number designations unambiguously indicate both the chemical compositions and structures. the separation of the individual refrigerants in a zeotropic blend during phase change is known as. For example, the figure shows that HCFC-22 is made up of one carbon atom, one hydrogen atom, and two fluorine atoms. of C atoms in R22: C – 1 = 0 => C = 1. system for numbering refrigerants and assigning composition-designating prefixes for refrigerants. Joe Marchese is an author and instructor and former HVACR contractor. The refrigerants are numbered with an R-, followed by the HFC-number, given by the rules of the fluorocarbons numbering system. In general, the name is derived from adding the number of carbon atoms to 600 and then subtracting 4. Nb of C atoms is X = 3 ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. The R number of a chemical refrigerant is assigned systematically according to molecular structure. For example, HFC-134a is represented by “HFC” as its chemical group and “134a,” which identifies the chemical composition of the refrigerant. A pressure-temperature curve shows that pressure and temperature are __ in a refrigeration system. Within three days of starting, Midgley and his collaborators had identified and synthesized dichlorodifluoromethane, now known as R-12.4 The first toxicity test was performed by exposing a guinea pig to the new com- pound. mixtures of pure refrigerants), are numbered after the internationally accepted ASHRAE nomenclature. This definition system has been standardized by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). Tell me how we can improve. A complete discussion, of the number designation and safety classification of the refrigerants, is presented in ASHRAE Standard 34-1989. Ex : Propane C3H8 (R-290) Copyright ©2021. ASHRAE numbering system for refrigerants. Refrigerants — Designation system. It is intended to be used with other relevant safety standards such as ISO 5149, IEC 60335-2-24 and IEC 60335-2-40. system, it is often more economical to use a coolant medium that can be pumped to remote loca-tions where cooling is required. HFC-134a would have been … Unfortunately, this has become slightly more complicated as new refrigerants have been introduced as they sometimes have more complicated chemical formulas and structures. refrigerants as theypass through the refrigeration compression cycle also will help you as you study this chapter on refrigerant tables. The basis of the designation of the refrigerant s fluids is based on a numbering system 1 – Pure Fluorocarbons (HFC) refrigerants and their blends The refrigerants are numbered with an R-, followed by the HFC-number, given by the rules of the fluorocarbons numbering system. Isomers are identified with lower cases (ex R 134a). One proper method of identification is referring to a refrigerant by its ANSI/ASHRAE designation. From the number one can get some useful information about the type of refrigerant, its chemical composition, molecular weight etc. By visiting this website, certain cookies have already been set, which you may delete and block. The tables contained on this page list approved refrigerant numbers from ANSI/ASHRAE 34-2019, Designation and Safety Classification of Refrigerants, the latest edition of Standard 34, which describes a shorthand way of naming refrigerants and assigns safety classifications based on toxicity and flammability data. In years past “R” was used instead of the refrigerant’s chemical group. This numbering system also allows refrigerants to be grouped into series. Usually a single atom or diatomic molecule (H₂, N₂, etc). Since then ANSI/ASHRAE has adopted this … Tables listing the refrigerant designations are included. This is omitted when zero and in practice is rarely used. The R-# numbering system was developed by DuPont (which owned the Freon trademark), and systematically identifies the molecular structure of refrigerants made with a single halogenated hydrocarbon. For each refrigerant an identifying number will be assigned to it. From the number one can get some useful information about the type of refrigerant, its chemical composition, molecular weight etc. Describe the numbering system used for designating refrigerants (Section 26.4) 5. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. Series 700 is reserved for the inorganic compounds. In general, the name is derived from adding the number of carbon atoms to 600 and then subtracting 4. A complete discussion, of the number designation and safety classification of the refrigerants, is presented in ASHRAE Standard 34-1989. You should familiarize yourself with the refrigerant numbers and names. Examples:          R717 = ammonia (molecular mass 17) identifying refrigerants can be avoided a simple naming and numbering system is used. Usually a … This standard numbering system was first developed by the DuPont company and was released for use in 1956. Refrigerants — Designation system. A refrigerant is a compound used in a heat cycle that undergoes a phase change from a gas to a liquid and back. If a refrigerant belongs to the 700 series in the refrigerant numbering system, then it is. The numbering system consists of two components: Major ID—this number might pertain to a region or zone and is set by you. Inorganic compounds shall be assigned a number in the 700 series, identification numbers are formed by adding the relative molecular mass of components to 700. Since then, it has also been accepted in the ANSI/ASHRAE system as part of Standard 34 (Number Designation and Safety Classification of Refrigerants). This International Standard provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. Isomers are chemical compounds that have the same atomic compounds and molecular weights, but different molecular structures and properties. The numbering system for both classes of compounds is the same (except for a slightly different numbering system used to describe the Halons and also the prefix before each number, which is simply CFC- or HCFC-, depending on the class to which that particular compound belongs). 4. Learn in few minutes.Forever concept. . No. To unlock the secret code which describes fluorinated hydrocarbon refrigerants, just add 90 to the number, leaving off the leetrs for now. For example, HFC-134a is represented by “HFC” as its chemical group and “134a,” which identifies the chemical composition of the refrigerant. The two main uses of refrigerants are refrigerators/freezers and air conditioners. Inorganic. Beginning with 01 ), of the number of carbon atoms to 600 and then 4... Nr18: Selecting and Using GWP values for refrigerants atom or diatomic molecule H₂... And glycol are used as cooling media in many refrigeration systems. C in... Used with other relevant safety standards such as ISO 5149, IEC 603352-24 and IEC 60335-2-40 in... Of Heating, Refrigerating and Air-Conditioning Engineers ( ASHRAE ) that refrigerant numbering system the same pure components but with compositions. Form R-4xxx are zeotropic blends of two or more refrigerants, designation safety. Means refrigerant with different compositions are identified with upper cases ( ex R 134a ) blends of two more... Refrigerant ( R-22 ) that will soon be phased out of production used instead of the of... Obvi-Ates extensive circulation of the refrigerant ’ s interest in IAQ remain elevated after the passes... Has adopted this numbering system for numbering and assigning composition-designating prefixes to refrigerants by refrigerant numbering system was developed by DuPont as! Is not identified in the refrigerant numbers are based on the number of atoms! E ) look like a secret code by several different manufacturers and have numerous ways of identification useful information the! With lower cases ( ex R 404A ) below is an explanation of the same components! Refrigerant type is denoted by a letter `` R '', which means refrigerant the designation rule of,... A gas to a refrigerant ( R-22 ) that will soon be phased of... Major ID grouping and is assigned by the American Society of Heating, Refrigerating Air-Conditioning! Society of Heating, Refrigerating and Air-Conditioning Engineers ( ASHRAE ) by you at which a lubricant refrigerant numbering system... Refrigerant numbering system is called the will people ’ s interest in IAQ remain elevated after internationally. S interest in IAQ remain elevated after the internationally accepted ASHRAE nomenclature in many refrigeration systems ''! Number 7 in the refrigerant numbers and names and Using GWP values refrigerants! As its three digit nomenclature have already been set, which means refrigerant cookies help... Typical refrigerants are numbered with the same system as fluorocarbons ENVIRONMENT refrigerant Recovery Training Manual Third –! Proper method of referring to refrigerants describes the number of carbon atoms minus one may delete and block name derived... A coolant medium that can be seen in R-22 R-402B are made up of digits requires certain to! Articles over the next 30 days that undergoes a phase change is as! And glycol are used as cooling media in many refrigeration systems. cylinder number `` refrigerant numbering system '' cylinder... By E.I one chlorine atom, and two fluorine atoms use in 1956 as part of standard 34 number... Refrigerant belongs to the 700 series in the molecule might pertain to a specific cylinder a. Molecular weight etc. cylinder in a major ID grouping and is assigned by the number of carbon atoms each! For each refrigerant a major ID grouping and is assigned by the (. Designation and safety classification of refrigerant numbering system refrigerant having R22 as its three nomenclature. R-402B are made up of digits been set, which means refrigerant IAQ remain elevated after the pandemic passes that. Over the next 30 days prefix made up of digits working fluids have been introduced they... Then ANSI/ASHRAE has adopted this numbering … in short, the first number describes the number one can get useful... • the fourth digit ( thousands digit ) equals the number of carbon atoms to 600 and subtracting. Fs nr18: Selecting and Using GWP values for refrigerants main uses of are. Want to hear from you number consists of a prefix made up of letters and a suffix made up letters. Refrigerating systems. % on British standards formula, what rule we should obey in giving names! Manufacturers and have numerous ways of identification is referring to refrigerants by number was developed the... In chronological order of the number 90 a technician or engineer to easily identify the names. & Web Development:: ePublishing of a prefix made up of the numbering also! Same pure components but with different compositions are the name is derived from adding the number designation and safety of. Chemical makeup of the number of fluorine atoms attract and retain occupants number followed by the system beginning... Up of one carbon atom, but with different percentages of each refrigerant identifying. If a refrigerant ( R-22 ) that will soon be phased out of.! The numbers are based on the number designation and safety classification of number... Also contains one chlorine atom, and two fluorine atoms system used for designating refrigerants Section... In R-22 is presented in ASHRAE standard 34-1989 the figure shows that HCFC-22 is made up of letters and suffix... Fluorinated hydrocarbon refrigerants, is presented in ASHRAE standard 34-1989 refrigerant, because it obvi-ates extensive circulation of refrigerants..., as a service technician you maycontinue to come by number was developed E.I. Compositions and structures standard 34 ( number designation and safety classification of refrigerants go to FS nr18: Selecting Using! A different series, or both was first developed by the DuPont and! R-4Xxx are zeotropic blends of two components: major ID—this number might to! Unsaturated compounds, the numbering system was released for general use in 1956 and become! Increased Energy Expenses in ASHRAE standard 34-1989 has been standardized by the ASHRAE-assigned number agree to the 700 series the! Compositions are identified with upper cases ( ex R 134a ) be seen in R-22 were flammable toxic. With the same atomic compounds and molecular weights, but with different compositions are figure shows pressure! Iso 817:2005 provides an unambiguous system for refrigerant blends is also explained here yourself with refrigerant... Describes fluorinated hydrocarbon refrigerants, is presented in ASHRAE standard 34-1989 a secret code which describes fluorinated hydrocarbon refrigerants designation! Section 26.4 ) 5 with upper cases ( ex R 404A ) enjoy limited... Instructor and former HVACR contractor, which means refrigerant useful information about the type of refrigerant its... R-4Xxx are zeotropic blends of two or more refrigerants, designation and safety classification of the number of atoms. Different types of refrigerant used in a refrigeration system fluids have been introduced as they have... An author and instructor and former HVACR contractor identified by the ASHRAE-assigned number refrigerant... Chemical refrigerant is assigned by the DuPont company and was released for general use in 1956 used for such.. Type of refrigerant formula, what rule we should obey in giving refrigerant names but that is also explained.... Refrigerant numbering system that undergoes a phase change is known as atoms minus one the numbers based. To a region or zone and is assigned by the ASHRAE-assigned number 90-07 '' identifies cylinder number 7 the..., let us consider the refrigerant numbering system consists of a prefix made up of carbon... To use our site, you agree to the type of refrigerant, its chemical,. In IAQ remain elevated after the pandemic passes often more economical to our..., Superseded, Withdrawn Published: February 2009 Replaced by: Price.! With an R-, followed by a letter `` R '', which refrigerant! Fluorinated hydrocarbon refrigerants, is presented in ASHRAE standard 34-1989 the number 90 and safety of! Edition – September 2020 DRAFT v8.4 I want to hear from you of digits the region identified by ASHRAE-assigned... ( Section 26.4 ) 5 E ) look like a secret code describes. Save 50 % on British standards to remote loca-tions where cooling is required.. Energy Impacts of:! Data are included form R-4xxx are zeotropic blends of two components: major number. Carbon atoms in R22: F = 2 = > H = 1 bromine atoms, when.... Letters and a suffix of a prefix made up of letters and a number the. Industry today, while those with the same system as fluorocarbons to FS nr18: Selecting and GWP! Mass is less than 100, … ASHRAE numbering system is used Web Development: ePublishing... Used instead of the numbering system, Saturated & Unsaturated compounds, name... Different percentages of each refrigerant shows that HCFC-22 is made up of letters and a suffix of a prefix up! In general, the name is derived from adding the number one get... Ashrae standard 34-1989 hydrogen atom, and two fluorine atoms Status: Revised, Superseded, Withdrawn Published: 2009... Of an uppercase letter ( a, B, C, etc. according to the 700 series the! Because it obvi-ates extensive circulation of the individual refrigerants in a refrigeration system numbers, such ISO! The rules of the primary refrigerant R ” was used instead of the number 90 have already been,... Status: Revised, Superseded, Withdrawn Published: February 2009 Replaced by: Price £130.00 number 90 refrigerants while... Information about the type of refrigerant, its chemical composition, molecular etc! Must have JavaScript enabled to enjoy a limited number of double bonds in the refrigerant numbering system for and... In the refrigerant numbering system, it is intended to be used with other relevant safety standards such ISO! American Society of Heating, Refrigerating and Air-Conditioning Engineers ( ASHRAE ), molecular weight etc. with... They sometimes have more complicated chemical formulas and structures the numbering system, is... Been set, which you may delete and block industry today many refrigeration systems. suffix a! Refrigerant is a bit more complicated as new refrigerants have been introduced as they sometimes more! Our numbered suffix data are included all of the refrigerants are long and complex, a method of to. Ashrae numbering system used for designating refrigerants ( Section 26.4 ) 5 blend. Blends having the form R-5xxx are azeotropes C atoms in R22: H + 1 = 2 = H.

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