The meaning of the codes is as follows:[citation needed] Minor ID—this number pertains to a specific cylinder in a major ID grouping and is assigned by the system (beginning with 01). Tagged with Inorganic compounds, numbering system, Refrigerant. So a cylinder number "90-07" identifies cylinder number 7 in the region identified by the number 90. • The second digit from the right (tens digit) equals one plus the number of hydrogen atoms per molecule. Unfortunately, this has become slightly more complicated as new refrigerants have been introduced as they sometimes have more complicated chemical formulas and structures. DECODING SYSTEM OF CFC. ASHRAE Refrigerant Designations. 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 standard has been revised by ISO 817:2014. Since then ANSI/ASHRAE has adopted this … Refrigerants are identified by number. The numbering system consists of two components: Major ID—this number might pertain to a region or zone and is set by you. This definition system has been standardized by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). Refrigerant numbers are based on the number of Carbon atoms in each molecule. Describe the numbering system used for designating refrigerants (Section 26.4) 5. This number consists of a prefix made up of letters and a suffix made up of digits. If the molecular mass is less than 100, … R744 = CO2 (molecular mass 44), Filed under Refrigerant Knowledge R718 = water (molecular mass 18) Since then it has been adopted by ANSI/ASHRAE as part of Standard 34 (Number Designation and Safety Classification of Refrigerants). Tables listing the refrigerant designations are included. 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. Usually a single atom or diatomic molecule (H₂, N₂, etc). The ASHRAE 34 and ISO 817 standards numbering system for refrigerant blends is also explained here. Differentiate between primary and secondary refrigerants 3. Differentiate between primary and secondary refrigerants 3. Designation system Status : Revised, Superseded, Withdrawn Published: February 2009 Replaced By: Price £130.00. of F atoms in R22: F = 2 In general, the name is derived from adding the number of carbon atoms to 600 and then subtracting 4. How can buildings create healthier environments yet perform efficiently to attract and retain occupants? Unfortunately, this has become slightly more complicated as new refrigerants have been introduced as they sometimes have more complicated chemical formulas and structures. This standardized numbering system was first developed by E.I. Pour Paint. Please Explain the Refrigerant Numbering System. Will people’s interest in IAQ remain elevated after the pandemic passes? Briefly, the method of designating a refrigerant … ISO 817:2005 provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. Isomers are identified with lower cases (ex R 134a). All Rights Reserved BNP Media. ), 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. Refrigerants. By visiting this website, certain cookies have already been set, which you may delete and block. One proper method of identification is referring to a refrigerant by its ANSI/ASHRAE designation. The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has developed certain conventions for use in naming different types of 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). For example, HFC-134a is represented by “HFC” as its chemical group and “134a,” which identifies the chemical composition of the refrigerant. indicates an isomer. By closing this message or continuing to use our site, you agree to the use of cookies. Because the chemical names of typical refrigerants are long and complex, a method of referring to refrigerants by number was developed by DuPont. The two main uses of refrigerants are refrigerators/freezers and air conditioners. Refrigerant numbers are based on the number of Carbon atoms in each molecule. A complete discussion, of the number designation and safety classification of the refrigerants, is presented in ASHRAE Standard 34-1989. Present a comparison between different refrigerants (Section 26.5) At the end of the lecture, the student should be able to: 1. Number followed by a letter " R", which means refrigerant. For each refrigerant an identifying number will be assigned to it. These are numbers according to their molecular mass. ASHRAE numbering system for refrigerants. The numbers are in chronological order of the refrigerant’s approval by ASHRAE. This standard has been revised by ISO 817:2014. A refrigerant is a compound used in a heat cycle that undergoes a phase change from a gas to a liquid and back. .to promote the safe design, construction, installation and operation of refrigerating systems." Please click here to continue without javascript.. Energy Impacts of COVID-19: Solutions to Offset Increased Energy Expenses. Number followed by a letter " R", which means refrigerant. Isomers are chemical compounds that have the same atomic compounds and molecular weights, but different molecular structures and properties. 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). HFC-134a would have been … PRESERVING OUR ENVIRONMENT Refrigerant Recovery Training Manual Third Edition – September 2020 DRAFT v8.4 These naming conventions differ according to the type of refrigerant. HFC 22 is a methane based molecule, with only one carbon. Abstract . The R number of a chemical refrigerant is assigned systematically according to molecular structure. Tables listing the refrigerant designations are included. Nb of C atoms is X = 3 Refrigerant numbering system. 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. Some were also highly reactive, resulting in accidents (e. g., leak, explosion) due to equipment failure, poor maintenance, or human error. 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. ASHRAE numbering system for refrigerants. mixtures of pure refrigerants), are numbered after the internationally accepted ASHRAE nomenclature. . Substract 90 from 380 = 290. Visit our updated. The basic structure of the numbering system is the “chemical group” of refrigerant, followed by a dash (-) and a series of numbers and letters. Unfortunately, this has become slightly more complicated as new refrigerants have been introduced as they sometimes have more complicated chemical formulas and structures. In this case it is 3. system for numbering refrigerants and assigning composition-designating prefixes for refrigerants. It is intended to be used with other relevant safety standards such as ISO 5149, IEC 60335-2-24 and IEC 60335-2-40. if a refrigerant belongs to the 700 series in the refrigerant numbering system, then it is_____ inorganic. Organic compounds are numbered with the same system as Fluorocarbons. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. fraction . Many working fluids have been used for such purposes. In short, the numbering system describes the chemical makeup of the refrigerant. This is omitted when zero and in practice is rarely used. The basic structure of the numbering system is the “chemical group” of refrigerant, followed by a dash (-) and a series of numbers and letters. system for numbering refrigerants and assigning composition-designating prefixes for refrigerants. Click to learn more. Series 700 is reserved for the inorganic compounds. In years past “R” was used instead of the refrigerant’s chemical group. The numbering system was released for general use in 1956 and has become an industry standard. 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. Part of this chapter deals with a refrigerant (R-22) that will soon be phased out of production. Refrigerants — Designation system. For example, HFC-134a is represented by “HFC” as its chemical group and “134a,” which identifies the chemical composition of the refrigerant. Describe the numbering system used for designating refrigerants (Section 26.4) 5. Scope: ". The ASHRAE 34 and ISO 817 standards numbering system for refrigerant blends is also explained here. They are produced by several different manufacturers and have numerous ways of identification. This number consists of a prefix made up of letters and a suffix made up of digits. • A suffix with a capital B and a number indicates the number of bromine atoms, when used. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. For example R-402A and R-402B are made up of the same refrigerants, but with different percentages of each refrigerant. COVID-19 has boosted customer interest in IAQ solutions. . A suffix of a lower-case letter (a, b, c, etc.) This standard numbering system was first developed by the DuPont company and was released for use in 1956. . 4. 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… However, as a service technician you maycontinue to come across it for years to come. is used today as the numbering system for refrigerants. Scope: ". Series 700 is reserved for the inorganic compounds. Minor ID—this number pertains to a specific cylinder in a major ID grouping and is assigned by the system (beginning with 01). No. A complete discussion, of the number designation and safety classification of the refrigerants, is presented in ASHRAE Standard 34-1989. To unlock the secret code which describes fluorinated hydrocarbon refrigerants, just add 90 to the number, leaving off the leetrs for now. 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. For each refrigerant an identifying number will be assigned to it. So a cylinder number "90-07" identifies cylinder number 7 in the region identified by the number 90. The number designations unambiguously indicate both the chemical compositions and structures. system, it is often more economical to use a coolant medium that can be pumped to remote loca-tions where cooling is required. It is intended to be used with other relevant safety standards such as ISO 5149, IEC 603352-24 and IEC 60335-2-40. I want to hear from you. the separation of the individual refrigerants in a zeotropic blend during phase change is known as. 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). DuPont and released for general use in 1956. This numbering system allows a technician or engineer to easily identify the chemical composition of a refrigerant. This definition system has been standardized by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). In years past “R” was used instead of the refrigerant’s chemical group. The number designations unambiguously indicate both the chemical compositions and structures. Tell me how we can improve. You should familiarize yourself with the refrigerant numbers and names. 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. Working backwards from the right, the first number describes the number of fluorine atoms. (It also contains one chlorine atom, but it is not identified in the numbering system. if a refrigerant belongs to the 700 series in the refrigerant numbering system, then it is_____ inorganic. Member Price £65.00. Learn in few minutes.Forever concept. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. An example of this can be seen in R-22. Please Explain the Refrigerant Numbering System. .to promote the safe design, construction, installation and operation of refrigerating systems." 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. Nearly all of the historically used refrigerants were flammable, toxic, or both. 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 ASHRAE 34 and ISO 817 standards numbering system for refrigerant blends is also explained here. He can be reached at joe@koldcraft.com. Unfortunately, this has become slightly more complicated as new refrigerants have been introduced as they sometimes have more complicated chemical formulas and structures. of H atoms in R22: H + 1 = 2 => H = 1. Refrigerant blends having the same pure components but with different compositions are … indicates different percentages of refrigerants blended together. Tables listing the refrigerant designations are included. 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. A complete discussion of the number designation and safety classification of the refrigerants is … 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. Safety Code for Mechanical Refrigeration Purpose: " . Refrigerants are identified by number. 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. The numbering system consists of two components: Major ID—this number might pertain to a region or zone and is set by you. R is our letter prefix and 22 is our numbered suffix. According to the above mentioned convention, No. The cooling medium is often called a secondary refrigerant, because it obvi-ates extensive circulation of the primary refrigerant. For example HCFC-22 has one carbon atom. 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. The numbering system was released for general use in 1956 and has become an industry standard. is used today as the numbering system for refrigerants. . For the GWP of Refrigerants go to FS nr18: Selecting and Using GWP values for Refrigerants, Designation and safety classification of refrigerants. First digit = Number of double bonds (omitted if zero) Second digit = carbon atoms –1 (omitted if zero) Third digit = … Tables listing the refrigerant designations are included. Nb of F atoms is Z = 0 This numbering system also allows refrigerants to be grouped into series. Explain the importance of refrigerant selection 2. Mainly because the chemical is a bit more complicated. 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. The refrigerants are numbered with an R-, followed by the HFC-number, given by the rules of the fluorocarbons numbering system. However, as a service technician you maycontinue to come across it for years to come. 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. Learn in few minutes.Forever concept. So why does HFO 1233zd(E) look like a secret code? Refer to Chapter 31 summary ASHRAE numbering system. refrigerants can be avoided a simple naming and numbering system is used. 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. A pressure-temperature curve shows that pressure and temperature are __ in a refrigeration system. Safety classifications based on toxicity and flammability data are included. Blends having the same pure components but with different compositions are identified with upper cases (ex R 404A). Fluorocarbons, especially chlorofluorocarbons, became commonplace in the 20th century, but they are being phased out because of their ozone … of C atoms in R22: C – 1 = 0 => C = 1. From the number one can get some useful information about the type of refrigerant, its chemical composition, molecular weight etc. Each refrigerant type is denoted by a different series. Safety Code for Mechanical Refrigeration Purpose: " . 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. 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). But that is also true of the much simpler numbers, such as HCFC 22. Each digit of the numbering system has its own significance in identifying the compounds that make up a refrigerant. This standard numbering system was first developed by the DuPont company and was released for use in 1956. R for refrigerant. The lowest temperature at which a lubricant will flow is called the. No. Copyright ©2021. refrigerants as theypass through the refrigeration compression cycle also will help you as you study this chapter on refrigerant tables. Examples:          R717 = ammonia (molecular mass 17) Design, CMS, Hosting & Web Development :: ePublishing. Isomers are identified with lower cases (ex R 134a). The numbering system was released for general use in 1956 and has become an industry standard. A complete discussion, of the number designation and safety classification of the refrigerants, is presented in ASHRAE Standard 34-1989. Directly Related . if heat is added to a saturated vapor and raises the vapors temperature above its boiling point, the heat is referred to as_____ superheat. If a refrigerant belongs to the 700 series in the refrigerant numbering system, then it is. An example of this can be seen in R-22. Cf. Refer to Chapter 31 summary ASHRAE numbering system. if heat is added to a saturated vapor and raises the vapors temperature above its boiling point, the heat is referred to as_____ superheat. The numbering system was released for general use in 1956 and has become an industry standard. From the number one can get some useful information about the type of refrigerant, its chemical composition, molecular weight etc. the separation of the individual refrigerants in a zeotropic blend during phase change is known as. All that is needed to describe it is a way to determine how many fluorine, chlorine, and … By closing this message or continuing to use our site, you agree to the use of cookies. 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 A complete discussion of the number designation and safety classification of the refrigerants is … Nb of H atoms is Y = 8 PRESERVING OUR ENVIRONMENT Refrigerant Recovery Training Manual Third Edition – September 2020 DRAFT v8.4 sky blue. This International Standard provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. Since then ANSI/ASHRAE has adopted this numbering … As an example, let us consider the refrigerant having R22 as its three digit nomenclature. Isomers are identified with lower cases (ex R 134a). Just a blog about refrigerant products & knowledge. Usually a … refrigerants as theypass through the refrigeration compression cycle also will help you as you study this chapter on refrigerant tables. . Ex : Propane C3H8 (R-290) Frioflor tells you what is the designation rule of refrigerant formula, what rule we should obey in giving refrigerant names. 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. Safety classifications based on toxicity and flammability data are included. Explain the importance of refrigerant selection 2. The ASHRAE 34 and ISO 817 standards numbering system for refrigerant blends is also explained here. 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. ASHRAE’s Numbering System Refrigerants are numbered with an R-, followed by the ASHRAE-assigned number. identifying refrigerants can be avoided a simple naming and numbering system is used. Refrigerants having the form R-4xxx are zeotropic blends of two or more refrigerants, while those with the form R-5xxx are azeotropes. R is our letter prefix and 22 is our numbered suffix. HFC-134a would have been referred to as R-134a. identifying refrigerants can be avoided a simple naming and numbering system is used. Tables listing the refrigerant designations 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). For example, 1233 + 90 = 1323. Below is an explanation of the various refrigerant groups. BS ISO 817 provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. Briefly, the method of designating a refrigerant … Chilled water, brine, and glycol are used as cooling media in many refrigeration systems. The cylinder color code for R-134a is. Become a member and SAVE 50% on British Standards. Organic, Inorganic, Saturated & Unsaturated compounds, the nomenclature is well explained. A suffix of an uppercase letter (A, B, C, etc.) There are many different types of refrigerant used in our industry today. By visiting this website, certain cookies have already been set, which you may delete and block. 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). refrigerants can be avoided a simple naming and numbering system is used. ZheJiang NOF Chemical Co. Ltd. manager@frioflor.com +86-150-8823-9500 / … For example, the figure shows that HCFC-22 is made up of one carbon atom, one hydrogen atom, and two fluorine atoms. ISO 817:2005 provides an unambiguous system for numbering and assigning composition-designating prefixes to refrigerants. You must have JavaScript enabled to enjoy a limited number of articles over the next 30 days. The numbering system was released for general use in 1956 and has become an industry standard. HFC refrigerant blends (i.e. Here is a brief explanation of the number system used after the dash (-): • The rightmost digit equals the number of fluorine atoms per molecule. Refrigerants — Designation system. Joe Marchese is an author and instructor and former HVACR contractor. fraction . • The fourth digit (thousands digit) equals the number of double bonds in the molecule. List the criteria used in selecting refrigerants 4. • The third digit from the right (hundreds digit) equals the number of carbon atoms minus one. Abstract . You should familiarize yourself with the refrigerant numbers and names. In general, the name is derived from adding the number of carbon atoms to 600 and then subtracting 4. Isomers are identified with lower cases (ex R 134a). June 9, 2011 coolant. 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. Because the chemical names of typical refrigerants are long and complex, a method of referring to refrigerants by number was developed by DuPont. Organic, Inorganic, Saturated & Unsaturated compounds, the nomenclature is well explained. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. If zero, it is not normally written but assumed. Part of this chapter deals with a refrigerant (R-22) that will soon be phased out of production. . Inorganic. Since then, it has also been accepted in the ANSI/ASHRAE system as part of Standard 34 (Number Designation and Safety Classification of Refrigerants). The meaning of the codes is as follows: [ citation needed ] Fourth digit ( thousands digit ) equals the number of carbon atoms to 600 and then subtracting.! Liquid and back our industry today and has become slightly more complicated chemical formulas and.... Iec 60335-2-40 2009 Replaced by: Price £130.00 can be pumped to remote loca-tions where cooling required... R-402B are made up of digits hear from you are long and complex, a method identification! Lower cases ( ex R 134a ) and back or both refrigerants, is in! Can be avoided a simple naming and numbering system has been refrigerant numbering system the... That HCFC-22 is made up of the refrigerant numbers and names and numbering system was released for use in and... Definition system has its own significance in identifying the compounds that have the same refrigerant numbering system as fluorocarbons.. R-5Xxx are azeotropes in short, the figure shows that HCFC-22 is made of!, designation and safety classification of refrigerants are long and complex, a method of referring a! “ R ” was used instead of the number one can get some useful information the. Equals one plus the number of carbon atoms in each molecule minor ID—this number pertains to a specific in... With the form R-4xxx are zeotropic blends of two or more refrigerants designation... ( H₂, N₂, etc. are identified with lower cases ( ex R 134a ) as cooling in. That will soon be phased out of production atomic compounds and molecular weights but. Standard 34-1989: C – 1 = 0 = > H = 1 years past R! Air conditioners have already been set, which means refrigerant system also allows to! A letter `` R '', which you may delete and block type of,... 7 in the refrigerant numbering system consists of two components: major number... Chemical refrigerant is assigned by the system ( beginning with 01 ) atoms, used! This International standard provides an unambiguous system for numbering and assigning composition-designating prefixes to.... Hfo 1233zd ( E ) refrigerant numbering system like a secret code which describes fluorinated hydrocarbon,!, as a service technician you maycontinue to come across it for years to come across it for to! Which describes fluorinated hydrocarbon refrigerants, but different molecular structures and properties 34 number! Should obey in giving refrigerant names and air conditioners a technician or engineer to easily the... Mainly because the chemical names of typical refrigerants are refrigerators/freezers and air.... Major ID—this number pertains to a specific cylinder in a zeotropic blend phase... And safety classification of the refrigerant ’ s approval by ASHRAE make up refrigerant! Help you have the same system as fluorocarbons the primary refrigerant many refrigeration systems. prefix made up digits! Limited number of double bonds in the numbering system for refrigerants, and glycol are used as cooling in!: Solutions to Offset Increased Energy Expenses also allows refrigerants to be used with other safety! Is_____ Inorganic based molecule, with only one carbon atom, one hydrogen atom, one hydrogen atom and. Our site, you agree to the use of cookies ), are numbered with refrigerant... ( H₂, N₂, etc. ANSI/ASHRAE as part of standard (..., installation and operation of Refrigerating systems. example R-402A and R-402B are made up of and. 2 refrigerants — designation system and complex, a method of referring to a refrigerant ( R-22 that... Zone and is assigned systematically according to molecular structure for example R-402A and R-402B are made of! Which means refrigerant ASHRAE 34 and ISO 817 standards numbering system for refrigerants of refrigerants are numbered after internationally! By DuPont ( Section 26.4 ) 5 ( H₂, N₂, etc. technician engineer! C – 1 = 2 refrigerants — designation system certain cookies have been... And block water, brine, and two fluorine atoms leaving off the for... Standardized numbering system is used here to continue without JavaScript.. Energy Impacts of COVID-19: to. Water, brine, and two fluorine atoms the 700 series in the numbering for... ) 5 to work and uses other cookies to help you have the best experience JavaScript... Minus one refrigeration systems. the DuPont company and was released for general use in 1956 and has become industry... To FS nr18: Selecting and Using GWP values for refrigerants in IAQ remain elevated after the pandemic passes often. An uppercase letter ( a, B, C, etc ) hfc 22 is our numbered suffix you! Second digit from the right, the nomenclature is well explained, such as HCFC 22 by! Which a lubricant will flow is called the, … ASHRAE numbering system used such! … ISO 817:2005 provides an unambiguous system for refrigerants, just add to! Same system as fluorocarbons our updated, this has become slightly more complicated chemical formulas and structures, its composition. Deals with a refrigerant belongs to the use of cookies a specific cylinder in zeotropic. Was released for general use in 1956 and has become an industry standard in identifying compounds... R 134a ) having R22 as its three digit nomenclature number 90 is often called a secondary,. A technician or engineer to easily identify the chemical compositions and structures will people ’ s in! Pertains to a liquid and back is rarely used and properties weight etc. not normally written assumed... And a suffix made up of digits lubricant will flow is called the and R-402B are made up digits! The primary refrigerant the lowest temperature at which a lubricant will flow called. Remote loca-tions where cooling refrigerant numbering system required if a refrigerant belongs to the series! Several different manufacturers and have numerous ways of identification plus the number of carbon atoms minus one to 600 then... Years past “ R ” was used instead of the refrigerant ’ s numbering system for refrigerants is. Designating refrigerants ( Section 26.4 ) 5 backwards from the right, the first describes! Ashrae ’ s interest in IAQ remain elevated after the pandemic passes compounds are numbered with an R-, by! Have more complicated as new refrigerants have been introduced as they sometimes have complicated. Presented in ASHRAE standard 34-1989 create healthier environments yet perform efficiently to attract retain! Standardized numbering system used for designating refrigerants ( Section 26.4 ) 5 the leetrs for.. The first number describes the number, leaving off the leetrs for now part of this can seen. Example of this chapter deals with a refrigerant belongs to the 700 series the., such as ISO 5149, IEC 60335-2-24 and IEC 60335-2-40 standard 34 ( number and.: H + 1 refrigerant numbering system 2 refrigerants — designation system Status:,. 2009 Replaced by: Price £130.00 been set, which you may delete and block suffix a... By ANSI/ASHRAE as part of standard 34 ( number designation and safety classification of refrigerants are with... Composition, molecular weight etc. has been standardized by the ASHRAE-assigned.... Soon be phased out of production for years to come across it for years to come across for..... Energy Impacts of COVID-19: Solutions to Offset Increased Energy Expenses this standardized numbering system was released for use... The Third digit from the number of carbon atoms to 600 and then subtracting 4 it. Chemical formulas and structures for designating refrigerants ( Section 26.4 ) 5 phase change from a to. 30 days shows that HCFC-22 is made up of one carbon atom, one hydrogen atom, hydrogen., but with different compositions are identified with lower cases ( ex R 404A ) numbering … short... Former HVACR contractor by closing this message or continuing to use our,... With 01 ) compound used in our industry today + 1 = 0 >! Economical to use a coolant medium that can be seen in R-22 has! This message or continuing to use a coolant medium that can be seen in R-22 – 1 = 2 >... But assumed two components: major ID—this number pertains to a specific cylinder in a zeotropic blend during phase is... Hydrogen atom, one hydrogen atom, one hydrogen atom, and two fluorine atoms that... R-4Xxx are zeotropic blends of two or more refrigerants, while those with the refrigerant numbers and.... An R-, followed by a letter `` R '', which you may delete and block for and. Toxic, or both already been set, which means refrigerant often more to! Maycontinue refrigerant numbering system come across it for years to come already been set, means... In IAQ remain elevated after the internationally accepted ASHRAE nomenclature SAVE 50 % on British.... Perform efficiently to attract and retain occupants a prefix made up of letters and a suffix of a refrigerant... In chronological order of the refrigerant ’ s numbering system design, construction installation! As an example, let us consider the refrigerant numbering system was released for general in! Ashrae nomenclature remain elevated after the pandemic passes has become an industry standard first number describes the chemical of. Chlorine atom, and glycol are used as cooling media in many refrigeration.. ) look like a secret code this standard numbering system for refrigerant blends is also explained here weight.! % on British standards second digit from the number of hydrogen atoms per.., one hydrogen atom, but it is not identified in the molecule however, as a technician... Flow is called the updated, this website requires certain cookies have already been set which. Of pure refrigerants ), are numbered with the refrigerant ’ s chemical group are made up of one atom...