refrigerant numbering system

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

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