SYSTEM AND METHOD FOR RETROFITTING A REFRIGERATION SYSTEM FROM HCFC TO HFC REFRIGERANT

Description

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a Continuation of U.S. patent application Ser. No. 15/255,826, filed Sep. 2, 2016, now U.S. Pat. No. 10,094,603, issued Oct. 9, 2018, which is a Continuation of U.S. patent application Ser. No. 14/877,609, filed Oct. 7, 2015, now U.S. Pat. No. 9,435,575, issued Sep. 6, 2016, which is a Continuation of Ser. No. 14/744,776, filed Jun. 19, 2015, now pending, which each claim benefit of priority from U.S. Provisional Patent Application No. 62/032,129, filed Aug. 1, 2014 and from U.S. Provisional Patent Application No. 62/017,530, filed Jun. 26, 2014, the entirety of which are expressly incorporated herein by reference. This application is related to PCT/US15/37689, filed Jun. 25, 2015.

FIELD OF THE INVENTION

The present invention relates to the field of refrigerants, refrigeration systems, and refrigeration system lubricants.

BACKGROUND OF THE INVENTION

R-407C is an HFC refrigerant replacement for R-22, a HCFC refrigerant, in positive displacement systems such as new or existing residential and commercial air-conditioners and heat pumps. R-407C offers similar performance to R-22 and can be used to retrofit existing R-22 air-conditioning and refrigeration systems.

R-407C is a mixture of hydrofluorocarbons used as a refrigerant. It is a zeotropic blend of difluoromethane (R-32), pentafluoroethane (R-125), and 1,1,1,2-tetrafluoroethane (R-134a). R-32, R-125 and R-134a are present in the proportions 23%/25%/52% by weight (a ±2% tolerance is allowed for each of the components). R-407A is a mixture of 20% R32, 40% R125, and 40% R-134a, and is therefore R-407A is similar in many respects to R407C. Difluoromethane serves to provide the heat capacity, pentafluoroethane decreases flammability, tetrafluoroethane reduces pressure. R-22 is chlorodifluoromethane.

Most compressors require a lubricant to protect internal moving parts. The compressor manufacturer usually recommends the type of lubricant and proper viscosity that should be used to ensure acceptable operation and equipment durability. Recommendations are based on several criteria, which can include: lubricity; lubricant/refrigerant solubility; lubricant/refrigerant miscibility; compatibility with materials of construction; and thermal stability and compatibility with other lubricants. It is important to follow the manufacturer's recommendations for lubricants to be used with their equipment.

Lubricant return to the compressors is very important as well. One factor that affects this is the liquid-phase lubricant/refrigerant miscibility, particularly at evaporator temperatures. Miscibility is the ability of two liquids to mix and form a single liquid phase. Ideally, the lubricant-refrigerant pair have sufficient miscibility or mutual solubility to allow the lubricant to flow with the liquid refrigerant and return to the compressor in a single phase. Even if the lubricant/refrigerant pair are not miscible (two liquid phases form) in the evaporator, they may still have some degree of solubility. Solubility of refrigerant in lubricant lowers lubricant viscosity, which helps it flow through the evaporator and return to the compressor. This is why many refrigeration systems can operate properly, even though the lubricant and refrigerant are immiscible (yet partially soluble) at evaporation temperatures. Other factors, such as refrigerant vapor velocity and system geometry, play key roles in lubricant return. Overall, it is important to note that lubricant/refrigerant miscibility is helpful, but not necessarily essential for proper system operation.

In general, R-22 and mineral oil are miscible over most of the expected ranges of operating conditions for normal air conditioning and high to medium temperature operation. Miscibility is generally believed to aid lubricant return to the compressor. The miscibility of refrigerant and lubricant is determined by several factors: the relative amounts of refrigerant and lubricant present, the temperature, the chemical makeup of the lubricant and of the refrigerant, and the viscosity of the lubricant.

Therefore, it may be desirable in a retrofit of an existing system of this type to use a miscible lubricant, such as polyol ester lubricant, with R-407C refrigerant. In general, R-407C is miscible with polyol ester (POE) lubricant and immiscible with alkylbenzene and mineral oil lubricant.

Residual mineral oil or alkylbenzene left in a refrigeration system after a retrofit to any HFC refrigerant is performed is known to decrease the lubricant/refrigerant miscibility. This is one of the reasons why three oil changes are generally recommended when a system is being converted or retrofit to use HFC refrigerants and POE lubricants. Thus, a traditional recommendation is to replace all mineral oil or alkylbenzene lubricant with POE during a retrofit.

Emerson Climate Technologies (Copeland®) provided in 1995 & 2005 the following recommendations when conducting a changeover: “Copeland's only approved lubricants for use with R-407C are Polyol ester lubricants”; “Mineral oil lubricant, such as 3GS, cannot be used as the compressor lubricant. Copeland recommends the following lubricant choices: Polyol Ester (POE)”; “The mineral oil must be removed from the compressor crankcase. Hermetic compressors will have to be removed from the piping and the lubricant drained out through the suction stub. It is advisable to do an acid test on the lubricant removed”; “Those systems that have oil separators, oil reservoirs, oil floats and suction line accumulators must have the oil drained from them. If the liquid control device is going to be replaced, it is advisable that the suction line, liquid line, and evaporator coil be blown clean using properly regulated dry nitrogen”; “POEs are very hygroscopic. They will very quickly absorb moisture from the air once the container is opened. Once the lubricant is added to the compressor, the compressor should be quickly installed. Like an open container, an open compressor with POE will absorb moisture. Add the correct amount of lubricant, to the compressor. On systems using enhanced surfaces in the heat exchanger, excessive mineral oil can adversely effect the heat transfer due to logging. Therefore, it is desirable to have no more than one percent mineral oil in systems employing these types surfaces.” lvhvac.com/cope_bulletins/95-14.pdf.

Dupont (2004) advises that no more than 5% mineral oil remain in the refrigeration system after a changeover from R-22 to R-407C.

(www2.dupont.com/Refrigerants/en_US/assets/downloads/h70004_Suva407c_retrofit_guide.pdf)

Similarly, Tecumseh advised in 2009 (www.air-innovations.nl/web/pdf/GUIDELINES-FOR-UTILIZATION-OF-R407C.pdf):

• • Synthetic Lubricants: Polyol Esters (POEs) And Polyvinyl Ethers (PVEs)
  • A) Miscibility
  • 1. Miscibility is the ability of the lubricant and the refrigerant to mix. This miscibility is a very important factor in providing proper heat transfer and in returning lubricant to the compressor in a refrigeration system over its range of operating temperatures.
  • 2. R407C and Mineral oils (MO) are not miscible
  • 3. Polyol Ester (POE) as well as Polyvinyl Ether (PVE) oils and R407C are miscible.
  • 4. R407C and Synthetic Alkylate (SA) oils are partially miscible . . . .
  • C) Compatibility . . .
  • 2. While polyol ester and polyvinyl ether oils are compatible with mineral oils, they should not be indiscriminately mixed with mineral oils in R407C refrigerant systems. This practice could result in the inability of the oil to return to the compressor and/or reduce heat transfer performance in the evaporator. However, small amounts up to 5% of mineral oil are acceptable in field retrofit situations (1% or less is preferred).

Ennio Campagna et al., “The Use of R-407C: Applications and Guidelines”, makina.beun.edu.tr/eskisite/akademik_kadro/meyriboyun/mak723/The_Use_of_R-407C.pdf, states:

• • 1) General Considerations for HFC Refrigerants
  • Systems which use R407C normally have compressors charged with a miscible lubricant such as POE (polyolester). There are many manufacturers and grades of these lubricants. R-407C is generally not used with mineral or alkyl-benzene (i.e. hydrocarbon based) oils as the miscibility is not adequate to ensure satisfactory oil return to the compressor. It is very important that, when servicing a system and oil is needed, the correct oil be used. Seek guidance from the system or compressor manufacturer on which specific oil to use in a maintenance situation.
  • b) System contamination with mineral oils, or with R22, can have a serious effect on performance and system reliability. Systems which use enhanced tube heat exchangers (evaporators and condensers) are particularly vulnerable to performance degradation arising from the presence of HC based oils. It is strongly recommended that dedicated service gauge sets are used for R407C to prevent inadvertent contamination.

Similarly, Herronhill provides general guidelines to assist in the replacement of R22 condensing units with equivalent R407C units (2004, www.heronhill.co.uk/technical-information/40/converting-r22-systems-to-r407c), stating “Condensing units built and supplied by IMI Air Conditioning Ltd. (now Marstair Ltd) before 1999, for use with R22 will contain mineral oil. R407C units will contain polyolester oil (POE). Check the compressor label to confirm the type of oil in the system. For safe system operation it is essential to remove the mineral oil from the existing system, as R407C is not compatible with mineral oil. On completion of the change over the concentration of mineral oil remaining in the system should not exceed 5% of the total oil charge.

Sundaresan, S. G.; Pate, M. B.; Doerr, T. M.; and Ray, D. T., “A Comparison of the Effects of POE and Mineral Oil Lubricants on the In-Tube Evaporation of R-22, R-407C and R-410A” (1996). International Refrigeration and Air Conditioning Conference. Paper 322. docs.lib.purdue.edu/iracc/322, describe tests on the heat transfer efficiency of R-22, R-407C and R-410A on smooth and finned tubes, when neat, mixed with mineral oil, and when mixed with POE oil. POE-mineral oil mixtures were not tested. The heat transfer efficiency was higher for R-407C mixed with POE than with mineral oil.

Some more recent consideration of the choice or lubricant considers mixtures of lubricants, including mineral oil (MO) and polyol esters (POE). For example, The News, (Peter Powell, Dec. 3, 2012, www.achrnews.com/articles/print/121529-retrofit-round-up-plenty-of-options) states:

• • Retrofit Round-up: Plenty of Options
  • Because no one HFC refrigerant can be retrofitted efficiently into the entire range of R-22 equipment, a wide and sometimes changing variety of HFCs have entered the market. The NEWS contacted a number of refrigerant manufacturers asking them to discuss some of their most popular HFCs for R-22 retrofits, the range of applications, and servicing tips.
  • While this can provide a guideline, The NEWS urges readers to contact refrigerant manufacturers directly to discuss the specific R-22 system being considered for retrofit and what HFC refrigerants might best work in such applications. This listing is in alphanumerical order according to ASHRAE designations.
  • R-407A
  • Gus Rolotti, technical marketing director of Arkema's North American fluorochemicals business, described R-407A as a refrigerant for low- and medium-temp refrigeration. “Both R-407A and R-407C are well proven in the industry and provide good performance coupled with a lower GWP. They require the use of a POE oil.” Because of that, there needs to be a changeout of the mineral oil in an existing R-22 system.
  • Noted Rolotti, “First, fix any leaks and identify components that may need to be replaced or fixed. Recover the R-22 completely, repair/replace any components as identified earlier and pull the system into a deep vacuum. Remove the required amount of mineral oil either by flushing with an external agent or using the R-22 from the system. Once most of the mineral oil is removed, replace it with POE oil and pull the system into a deep vacuum again. Refill with the appropriate amount of the retrofit refrigerant and run the system to set up controls and operating conditions. It is recommended that the filter drier is always replaced when the system is opened to ensure that there is fresh desiccant available to dry the system.”
  • R-407C
  • Arkema's Rolotti considers R-407C a choice for air conditioning. Retrofit procedures are similar to those with R-407A refrigerant.
  • In his comments regarding R-407C, Ron Vogl, technical marketing manager for Honeywell Refrigerants, described it as a choice for residential and light commercial a/c applications. The retrofit process for R-407C, he said, involves recovering R-22. Then, regarding oil, Vogl said, “POE is recommended. If existing MO is used, the addition of some POE to the system is required for proper oil return.” The use of the refrigerant requires a minimum of 20 percent POE for close-coupled a/c systems with no liquid receivers. No TXV change required, but minor adjustments may be needed. Replace any O-rings, seals, and other elastomers used in the system. In most air conditioning and heat pump systems this only applies to the Schrader valve seal and cap seal material. The next step is to evacuate and recharge. (Pounds of 407C=pounds of original refrigerant×70.6 divided by 73.9.) Then adjust system safety and operating controls; label system indicating refrigerant and charged lubricant.
  • National Refrigerants, states (date unknown, www.nationalref.com/pdf/R22_Alternatives.pdf):
  • Will the blends work with mineral oil?
  • HFC Refrigerants with Mineral Oil
  • They don't mix so the mineral oil will form a separate layer in the receiver or other high-side liquid hold up.
  • Mineral Oil will remain thick on the low side and not be returned back to the compressor.
  • Will the blends work with mineral oil?
  • Hydrocarbons (HC) in Blends
  • HC soaks into mineral oil and thins it so it will circulate easily around the system.
  • The thinned mineral oil will move easily on the low side.
  • The mineral oil/HC mixture will still not mix with liquid HFC on the high side of the system. A layer of oil will still form in the receiver or other liquid hold-up.
  • Partial POE Retrofit
  • Some amount of mineral oil is replaced with POE (does not require 3 flushes or less than 5% mineral oil).
  • The POE mixes well with the mineral oil, and the resulting mixture dissolves somewhat into liquid HFC.
  • The oil mixture will be carried by the liquid HFC out of the receiver.
  • National Refrigerants testing has shown that as little as 10% POE in mineral oil will circulate as much as an older compressor will pump out into a system.
  • These tests have also shown that there is very little difference in oil solubility with all of the blends on the market, regardless of the hydrocarbon content in the blend. Partial POE works with all of the blends, but hydrocarbons do not appear to help with liquid solubility of mineral oil with HFCs.

Therefore, there has been some evolution as to whether mineral oil can remain in the refrigeration system after a retrofit, with the permissible proportion of mineral oil increasing. In particular, National Refrigerants proposes a partial POE retrofit, with greater than 5% mineral oil remaining. However, the existing recommendations appear to require empirical testing for cases other than less than 5% mineral oil remaining.

See, U.S. Pat. Nos. 2,834,748; 2,846,458; 2,889,379; 2,917,480; 2,931,840; 2,970,988; 3,085,918; 3,384,828; 3,723,318; 3,884,828; 4,138,855; 4,198,313; 4,272,960; 4,465,786; 4,482,465; 4,788,352; 4,798,818; 4,810,403; 4,941,986; 4,944,890; 5,026,497; 5,053,155; 5,080,823; 5,108,637; 5,182,040; 5,227,245; 5,304,320; 5,318,716; 5,360,566; 5,370,812; 5,387,357; 5,417,871; 5,425,890; 5,458,798; 5,616,275; 5,622,644; 5,624,596; 5,626,790; 5,648,017; 5,672,293; 5,685,163; 5,714,083; 5,785,883; 5,788,886; 5,811,603; 5,968,406; 6,025,532; 6,106,740; 6,111,150; 6,117,356; 6,235,951; 6,258,292; 6,316,681; 6,374,629; 6,426,019; 6,516,837; 6,526,764; 6,589,355; 6,604,368; 6,606,868; 6,629,419; 6,673,976; 6,783,691; 6,858,571; 6,991,743; 7,238,299; 7,279,451; 7,341,984; 7,442,321; 7,465,698; 7,524,805; 7,629,306; 7,767,638; 7,825,081; 7,829,748; 7,833,433; 7,846,355; 7,862,742; 7,972,528; 8,008,244; 8,053,404; 8,101,672; 8,148,317; 8,444,874; 8,465,664; 8,551,354; 8,557,136; U.S. Published Patent Application Nos. 20020046568; 20030042463; 20040089839; 20040119047; 20040127383; 20040256594; 20050233923; 20050233931; 20050233932; 20050245421; 20050247905; 20060019857; 20060025322; 20060043331; 20060058560; 20060243944; 20060243945; 20070007488; 20070010592; 20070069175; 20070108403; 20070210275; 20070210276; 20070290163; 20070290177; 20080069177; 20080075673; 20080099190; 20080121837; 20080171652; 20080230738; 20080308763; 20080314073; 20090041677; 20090053695; 20090120619; 20090158771; 20090224199; 20090242828; 20090253820; 20090278076; 20090285764; 20090302285; 20090305876; 20100025619; 20100044619; 20100048961; 20100075046; 20100122545; 20100127209; 20100200798; 20110162410; 20110226983; 20110289748; 20120138846; 20120187331; 20120312048; 20130075063; 20130119299; 20130126776; 20130126777; 20130126778; CN101864276; CN95117074; DE4116274; EP0398147; EP0430169; EP0509673; EP0539952; EP0565265; EP0582451; EP0608164; EP0659862; EP0720639; EP0779352; EP0974571; EP1167894; EP1193305; EP1716216; EP1832640; EP1985680; EP2036943; EP2149592; EP2246649; EP2249104; GB2007000746; GB2435747; GB2440258; JP4110388; RU2073058; WO1998050331; WO2004037752; WO2004037913; WO2005042663; WO2005083028; WO2005103190; WO2005103191; WO2005103192; WO2005105947; WO2005108522; WO2005108523; WO2006094303; WO2007002625; WO2007035697; WO2007053697; WO2007099350; WO2007109748; WO2008027555; WO2008065011; WO2008076272; WO2008121776; WO2008121783; WO2008121785; WO2009047535; WO2009114397; WO2009134957; WO2009151669; WO2010000993; WO2010000994; WO2010002020; WO2010002023; WO2010056695; WO2010059677; WO2010065005; WO2010075046; WO2010088320; WO2010119265; WO2011019350; each of which is expressly incorporated herein by reference in its entirety.

SUMMARY OF THE INVENTION

The present invention provides a premixed HFC refrigerant and compatible POE lubricant, e.g., in a transport container. The amount of lubricant is selected to an amount between about 5% to 20% by weight of the refrigerant. Preferably, the amount is 8% by weight.

The amount of POE should be at least 10% of the total lubricant amount, with about 20% POE by weight of refrigerant representing the amount of POE in the absence of mineral oil.

The mixture is preferably provided in a transport container, typically DOT approved, such as a DOT-39 container.

The refrigerant-lubricant mixture is charged into the refrigeration system after recovery of the R-22 from the system, without special efforts to remove the mineral oil lubricant. Assuming that the residual mineral oil is 8-24% of the charge, and the mixed refrigerant includes 8% POE, the resulting mixture is about 25-50% of the total lubricant, and the resulting mixed lubricant is 16-32% of refrigerant charge. Therefore, the present technology provides a compromise amount of lubricant that is sufficient to provide a charge to a range of refrigeration systems to be retrofitted, without having to remove mineral oil already in the system, measure the amount of oil removed or infer the total amount, measure an amount of POE to be added to the system based on the actual amount of R-407C added to the system, or measuring mineral oil/POE ratios.

Therefore, the present technologies vastly simplify the process for retrofitting, while achieving good results. Indeed, preliminary tests show that the efficiency of an R-22 air conditioning system is improved after the retrofitting, a surprising result given that the system itself is optimized for R-22 and mineral oil.

The container may be, for example, a 10, 15, 20, 30, 40, 50, 96, 123 pound or larger container. The amount of lubricant may be, for example, 0.8, 1.2, 1.6, 2.4, 3.2, 4, 8, or 10 pounds (8% lubricant). Bulk quantities may also be provided.

The amount of POE may be varied, for example, and may be about 5%, 6%, 7%, 7.5%, 8%, 9%, 10%, 12%, 12.5%, 15%, or the like. The precision of measurement may be, for example. ±0.1%, ±0.2%, ±0.25%, ±0.3%, ±0.5%, ±0.75%, ±1%, or ±2%. Preferably, the precision is within ±0.5%.

The container may be a DOT 3, 3A, 3AA, 3AL, 3B, 3BN, 3E, 4B, 4BA, 4B240ET, 4BW, 4E, 39, steel drum, for example: DOT-3AL1800; DOT 4D; DOT-3; DOT-39; DOT-3A; DOT-3A1000; DOT-3A1200; DOT-3A150; DOT-3A1800; DOT-3A2000; DOT-3A225; DOT-3A240; DOT-3A2400; DOT-3A300; DOT-3A400; DOT-3A480; DOT-3A480X; DOT-3AA; DOT-3AA1000; DOT-3AA1200; DOT-3AA150; DOT-3AA1800; DOT-3AA2000; DOT-3AA225; DOT-3AA240; DOT-3AA2400; DOT-3AA300; DOT-3AA400; DOT-3AA480; DOT-3AAX1800; DOT-3AAX2000; DOT-3AAX2200; DOT-3AAX2400; DOT-3AL; DOT-3AL1000; DOT-3AL150; DOT-3AL1800; DOT-3AL2000; DOT-3AL225; DOT-3AL240; DOT-3AL2400; DOT-3AL400; DOT-3AL480; DOT-3AX1800; DOT-3AX2000; DOT-3AX2200; DOT-3AX2400; DOT-3B; DOT-3B150; DOT-3B1800; DOT-3B225; DOT-3B240; DOT-3B300; DOT-3B400; DOT-3BN400; DOT-3BN480; DOT-3E1800; DOT-3HT; DOT-3HT2000; DOT-3T1800; DOT-3T2000; DOT-3T2200; DOT-3T2400; DOT-4A; DOT-4AA480; DOT-4B; DOT-4B150; DOT-4B150; DOT-4B225; DOT-4B240; DOT-4B240ET; DOT-4B300; DOT-4B400; DOT-4B480; DOT-4BA; DOT-4BA225; DOT-4BA240; DOT-4BA300; DOT-4BA400; DOT-4BW; DOT-4BW225; DOT-4BW240; DOT-4BW300; DOT-4BW400; DOT-4BW480; DOT-4DA; DOT-4DS; DOT-4E225; DOT-4E240; DOT-4L; DOT-AAX2400; and ICC-3E1800.

The preferred embodiment encompasses R-407C. However, the method is more generally directed to a retrofitting of systems employing a range of refrigerants that generally require mineral oil, alkane or alkylbenzene lubricants (CFC, PCC, HCC, HCFC, CFO, HCFO), with refrigerants that generally require polymeric or oxygenated lubricants, e.g., POE, PVE (HFC, PFO) (CFC=Chlorofluorocarbon, CFO=Chlorofluoroolefin, HCFC=Hydrochlorofluorocarbon, HCFO=Hydrochlorofluoroolefin, HFC=Hydrofluorocarbon, HFO=Hydrofluoroolefin, PCC=Perchlorocarbon). See Table 1, en.wikipedia.org/wiki/List_of_refrigerants.

It is therefore an object to provide a transportable container for charging a refrigerant system, having a charging port, containing a polyol ester (POE) lubricant and a compatible HFC refrigerant in a predetermined proportion. The proportion may be at least 2%, 3%, or 5% by weight and less than 25%, 20%, or 15% by weight, and preferably 8% by weight.

It is another object to provide a composition for retrofitting an R-22 refrigeration system, comprising POE and R-407C. The POE may be present at between 2-25%, 3-20%, 5-15%, or preferably 8% by weight, with the balance substantially R-407C.

It is a further object to provide a method for retrofitting a refrigeration system from R-22 refrigerant to R-407C refrigerant, comprising evacuating the R-22 refrigerant from the refrigeration system while maintaining at least 25% of the lubricant, wherein the lubricant is not POE, and adding a premixture of POE mixed in R-407C to charge the refrigeration system. The POE may be present at between 2-25%, 3-20%, 5-15%, or preferably 8% by weight, with the balance substantially R-407C.

It is a still further object to provide a retrofit kit for an R-22 refrigeration system, comprising a DOT-approved transport container for R-407C containing a mixture of R-407C and POE, and at least one replacement seal compatible with R-407C. The POE may be present at between 2-25%, 3-20%, 5-15%, or preferably 8% by weight, with the balance substantially R-407C.

It is a still further object to provide a method for retrofitting a hermetically sealed refrigeration system from an HCFC refrigerant compatible with a mineral oil or alkyl benzene lubricant to a HFC refrigerant compatible with polyol ester lubricant, comprising: providing a transport container containing the HFC refrigerant mixed with polyol ester lubricant; withdrawing the HCFC from within the refrigeration system through a charge-discharge port, leaving at least a portion of the mineral oil or alkyl benzene lubricant; and charging the refrigeration system from the transport container with the HFC mixed with the polyol ester lubricant. The polyol ester lubricant may be present at between 2-25%, 3-20%, 5-15%, or preferably 8% by weight, with the balance substantially HFC.

Another object is to provide a method for retrofitting a system from an HCFC refrigerant compatible with a mineral oil or alkyl benzene lubricant to an HFC refrigerant compatible with a polyol ester lubricant, comprising: evacuating the HCFC from the system, leaving at least a portion of the mineral oil or alkyl benzene lubricant; and charging the refrigeration system with an HFC refrigerant mixed with a polyol ester lubricant in a predetermined ratio of 5-15% by weight.

A kit is provided for retrofitting an HCFC refrigeration system having residual mineral oil lubricant, comprising: a transport container, containing an HFC refrigerant mixed polyol ester lubricant. A kit is also provided for retrofitting an R-22 refrigeration system having residual mineral oil lubricant, comprising: a U.S. Department of Transportation certified transport container; and R-407C mixed with polyol ester lubricant. The polyol ester lubricant may be present at between 2-25%, 3-20%, 5-15%, or preferably 8% by weight. The mineral oil or alkyl benzene lubricant may be a mineral oil lubricant.

The HCFC to be replaced may comprise R-22, R-401A, R-409A, R-401B, R-409B, R-402A, R-402B, R-403B, R-408A, R-502, and/or mixtures of HCFCs, for example as provided in Table 1.

The HFC may comprise R-134a, R-404A, R-407A, R-407C, R-407F, R-410A, R-417A, R-417B, R-422A, R-422B, R-422C, R-422D, R-424A, R-427A, R-428A, R-434A, R-438A, R-442A, and R-507A, or for example, other blends of difluoromethane (R-32), pentafluoroethane (R-125), and 1,1,1,2-tetrafluoroethane (R-134a). Other HFCs or HFC blends, or HFC/HC blends, for example as provided in Table 1, may also be employed. The HFC may be a zeotropic blend.

The refrigeration system after recharging may have a concentration of about 15-32% mixed lubricant, or a concentration of about 20-25% mixed lubricant, or a concentration of about 15-25% mixed lubricant, by weight.

The transport container may be U.S. Department of Transportation compliant, e.g., DOT-39.

The metrics recited herein are intended to be interpreted according to common understanding and usage among those skilled in the art of refrigerant manufacture, distribution, and refrigeration system maintenance.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a flowchart of a method according to the present invention.

FIG. 2 shows a schematic diagram of the refrigeration system, after an HCFC refrigerant is removed, and while an HFC refrigerant and POE lubricant is being charged.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 shows a flowchart of a method according to the present invention. A refrigerant retrofit kit is provided, having within a transportable container, a mixture of a refrigerant and a compatible POE lubricant. The refrigerant is typically an HFC refrigerant. The HCFC refrigerant is evacuated from a refrigeration system to be retrofit, and a portion of the existing lubricant, which is a mineral oil or alkyl benzene lubricant, is removed through the charge port of the refrigeration system, without disassembly of the system. A portion of the mineral oil or alkyl benzene lubricant remains in the refrigeration system. The refrigeration system is then charged with the mixture of the refrigerant and the compatible POE lubricant through the charge port.

As shown in the schematic representation in FIG. 2, the refrigeration system includes a compressor, condenser and evaporator, as well as a charge port. A reservoir pools liquid refrigerant, as well as lubricants found within the system. After the HCFC refrigerant is removed from the system, a portion of the mineral oil or alkyl benzene lubricant remains in the system. During charging, the new refrigerant, typically an HFC, with a compatible POE lubricant, is drawn into the refrigeration system through the charge port, resulting in a mixed lubricant containing mineral oil or alkyl benzene lubricant and POE.

Example 1

A test was conducted of a residential air conditioning unit to determine the results of retrofitting an R-22 system with R-407C. In the test, the R-22 system, which was design and manufactured optimally for R-22, and used a mineral oil lubricant, was retrofitted with R-407C.

Instead of removing all of the mineral oil in the system, and replacing it with a defined amount of POE oil, which is required for R-407C, the R-22 was removed, and the residual mineral oil allowed to remain.

The evacuated system was recharged with a premixed quantity of R-407C with 8% by weight POE oil. Since R-407C is charged in the liquid phase, all of the oil, and most of the R-407C was transferred to the system from a transport container, e.g., DOT-39. The final POE concentration is estimated at 10-15% of the total oil in the system.

Prior to retrofitting, system was run for 13 hours over two days with the R-22 to collect the baseline data. The R-22 was then evacuated, and charged with R-407C to about 85% of the R-22 charge. The retrofitted refrigeration system with R-407C was then run for 91 hours.

The operating temperatures for R-22 (>86F and <86F) and R-407C (<86F) were not the same, so performance measurements are not directly comparable, but the results support a conclusion that the R-407C does not degrade system efficiency performance.

Therefore, despite the various unknowns, including the amount of mineral oil remaining in the system, migration characteristics of the mixed lubricants around the system, the impact of the various lubricant phases on compressor lubrication, the operation of the system with R-407C was improved over the R-22 implementation.

Comparative Example 1

See: www.honeywell-refrigerants.com/india/?document=guide-to-retrofitting-ac-systems-from-r-22-to-r-422d-or-r-407c&download=1;

www.honeywell.com/sites/servlet/com.merx.npoint.servlets.DocumentServlet?docid=DB0284B 88-942E-BOAS-4028-CAFB85BB40AB, which are expressly incorporated herein by reference.

Comparative Example 2

See:

www2.dupont.com/Refrigerants/en_US/assets/downloads/h70004_Suva407C_retrofit_guide.pdf, which is expressly incorporated herein by reference.

Comparative Example 3

See: opi.emersonclimate.com/CP1D/GRAPHICS/Types/AEB/95-14.pdf, which is expressly incorporated herein by reference.

Comparative Example 4

See: www.refrigerants.com/pdf/Nat-R407Broch.pdf, which is expressly incorporated herein by reference.

Comparative Example 5

See: neilorme.com/Tecumseh%20Guidelines%20R407c.shtml, which is expressly incorporated herein by reference.

Comparative Example 6

See: www.bristolcompressors.com/files/1313/5464/2815/application_bulletin_124.pdf, which is expressly incorporated herein by reference.

Comparative Example 7

See: americas.forane.com/export/sites/forane-americas/.content/medias/downloads/literature/forane-technical-digest.pdf, which is expressly incorporated herein by reference.

Although the present system and/or approach has been described with respect to at least one illustrative example, many variations and modifications will become apparent to those skilled in the art upon reading the specification. It is therefore the intention that the appended claims be interpreted as broadly as possible in view of the related art to include all such variations and modifications.

TABLE 1
				CAS registry
	ASHRAE			number/Blend
Type	Number	IUPAC Chemical Name	Molecular Formula	Name
PCC	R-10	Carbon tetrachloride	CCl4	56-23-5
		(Tetrachloromethane)
CFC	R-11	Trichlorofluoromethane	CCl3F	75-69-4
CFC	R-12	Dichlorodifluoromethane	CCl2F2	75-71-8
H	R-12B1	Bromochlorodifluoromethane	CBrClF2 or CF2ClBr	353-59-3
H	R-12B2	Dibromodifluoromethane	CBr2F2	75-61-6
CFC	R-13	Chlorotrifluoromethane	CClF3	75-72-9
H	R-13B1	Bromotrifluoromethane	CF3Br	75-63-8
PFC	R-14	Tetrafluoromethane	CF4	75-73-0
HCC	R-20	Chloroform (Trichloromethane)	CHCl3	67-66-3
HCFC	R-21	Dichlorofluoromethane	CHFCl2	75-43-4
HCFC	R-22	Chlorodifluoromethane	CHClF2	75-45-6
H	R-22B1	Bromodifluoromethane	CHBrF2 or CHF2Br	1511-62-2
HFC	R-23	Trifluoromethane (Fluoroform)	CHF3	75-46-7
HCC	R-30	Dichloromethane (Methylene	CH2Cl2	75-09-2
		chloride)
HCFC	R-31	Chlorofluoromethane	CH2FCl	593-70-4
HFC	R-32	Difluoromethane	CH2F2	75-10-5
HCC	R-40	Chloromethane	CH3Cl	74-87-3
HFC	R-41	Fluoromethane	CH3F	593-53-3
HC	R-50	Methane	CH4	74-82-8
PCC	R-110	Hexachloroethane	C2Cl6	67-72-1
CFC	R-111	Pentachlorofluoroethane	C2FCl5	354-56-3
CFC	R-112	1,1,2,2-Tetrachloro-1,2-	C2F2Cl4	76-12-0
		difluoroethane
CFC	R-112a	1,1,1,2-Tetrachloro-2,2-	C2F2Cl4	76-11-9
		difluoroethane
CFC	R-113	1,1,2-Trichlorotrifluoroethane	C2F3Cl3	76-13-1
CFC	R-113a	1,1,1-Trichlorotrifluoroethane	C2F3Cl3	354-58-5
CFC	R-114	1,2-Dichlorotetrafluoroethane	C2F4Cl2	76-14-2
CFC	R-114a	1,1-Dichlorotetrafluoroethane	C2F4Cl2	374-07-2
H	R-114B2	1,2-Dibromotetrafluoroethane	C2F4Br2	124-73-2
CFC	R-115	Chloropentafluoroethane	C2F5Cl	76-15-3
PFC	R-116	Hexafluoroethane	C2F6	76-16-4
HCC	R-120	Pentachloroethane	C2HCl5	76-01-7
HCFC	R-121	1,1,2,2-Tetrachloro-1-fluoroethane	C2HFCl4	354-14-3
HCFC	R-121a	1,1,1,2-Tetrachloro-2-fluoroethane	C2HFCl4	354-11-0
HCFC	R-122	1,1,2-Trichloro-2,2-difluoroethane	C2HF2Cl3	354-21-2
HCFC	R-122a	1,1,2-Trichloro-1,2-difluoroethane	C2HF2Cl3	354-15-4
HCFC	R-122b	1,1,1-Trichloro-2,2-difluoroethane	C2HF2Cl3	354-12-1
HCFC	R-123	2,2-Dichloro-1,1,1-trifluoroethane	C2HF3Cl2	306-83-2
HCFC	R-123a	1,2-Dichloro-1,1,2-trifluoroethane	C2HF3Cl2	354-23-4
HCFC	R-123b	1,1-Dichloro-1,2,2-trifluoroethane	C2HF3Cl2	812-04-4
HCFC	R-124	2-Chloro-1,1,1,2-tetrafluoroethane	C2HF4Cl	2837-89-0
HCFC	R-124a	1-Chloro-1,1,2,2-tetrafluoroethane	C2HF4Cl	354-25-6
HFC	R-125	Pentafluoroethane	C2HF5	354-33-6
HFC	R-E125	Pentafluorodimethyl ether	C2HF5O	3822-68-2
HCC	R-130	1,1,2,2-Tetrachloroethane	C2H2Cl4	79-34-5
HCC	R-130a	1,1,1,2-Tetrachloroethane	C2H2Cl4	630-20-6
HCFC	R-131	1,1,2-Trichloro-2-fluoroethane	C2H2FCl3	359-28-4
HCFC	R-131a	1,1,2-Trichloro-1-fluoroethane	C2H2FCl3	811-95-0
HCFC	R-131b	1,1,1-Trichloro-2-fluoroethane	C2H2FCl3	2366-36-1
HCFC	R-132	Dichlorodifluoroethane	C2H2F2Cl2	25915-78-0
HCFC	R-132a	1,1-Dichloro-2,2-difluoroethane	C2H2F2Cl2	471-43-2
HCFC	R-132b	1,2-Dichloro-1,1-difluoroethane	C2H2F2Cl2	1649-08-7
HCFC	R-132c	1,1-Dichloro-1,2-difluoroethane	C2H2F2Cl2	1842-05-3
H	R-132bB2	1,2-Dibromo-1,1-difluoroethane	C2H2Br2F2	75-82-1
HCFC	R-133	1-Chloro-1,2,2-Trifluoroethane	C2H2F3Cl	431-07-2
HCFC	R-133a	1-Chloro-2,2,2-Trifluoroethane	C2H2F3Cl	75-88-7
HCFC	R-133b	1-Chloro-1,1,2-Trifluoroethane	C2H2F3Cl	421-04-5
HFC	R-134	1,1,2,2-Tetrafluoroethane	C2H2F4	359-35-3
HFC	R-134a	1,1,1,2-Tetrafluoroethane	C2H2F4	811-97-2
HFC	R-E134	Bis(difluoromethyl)ether	C2H2F4O	1691-17-4
HCC	R-140	1,1,2-Trichloroethane	C2H3Cl3	79-00-5
HCC	R-140a	1,1,1-Trichloroethane (Methyl	C2H3Cl3 or CH3CCl3	71-55-6
		chloroform)
HCFC	R-141	1,2-Dichloro-1-fluoroethane	C2H3FCl2	430-57-9
H	R-141B2	1,2-Dibromo-1-fluoroethane	C2H3Br2F	358-97-4
HCFC	R-141a	1,1-Dichloro-2-fluoroethane	C2H3FCl2	430-53-5
HCFC	R-141b	1,1-Dichloro-1-fluoroethane	C2H3FCl2	1717-00-6
HCFC	R-142	Chlorodifluoroethane	C2H3F2Cl	25497-29-4
HCFC	R-142a	1-Chloro-1,2-difluoroethane	C2H3F2Cl	25497-29-4
HCFC	R-142b	1-Chloro-1,1-difluoroethane	C2H3F2Cl	75-68-3
HFC	R-143	1,1,2-Trifluoroethane	C2H3F3	430-66-0
HFC	R-143a	1,1,1-Trifluoroethane	C2H3F3	420-46-2
HFC	R-143m	Methyl trifluoromethyl ether	C2H3F3O	421-14-7
HFC	R-E143a	2,2,2-Trifluoroethyl methyl ether	C3H5F3O	460-43-5
HCC	R-150	1,2-Dichloroethane	C2H4Cl2	107-06-2
HCC	R-150a	1,1-Dichloroethane	C2H4Cl2	75-34-3
HCFC	R-151	Chlorofluoroethane	C2H4ClF	110587-14-9
HCFC	R-151a	1-Chloro-1-fluoroethane	C2H4ClF	1615-75-4
HFC	R-152	1,2-Difluoroethane	C2H4F2	624-72-6
HFC	R-152a	1,1-Difluoroethane	C2H4F2	75-37-6
HCC	R-160	Chloroethane (ethyl chloride)	C2H5Cl	75-00-3
HFC	R-161	Fluoroethane	C2H5F	353-36-6
HC	R-170	Ethane	C2H6 or CH3CH3	74-84-0
HC	R-E170	Dimethyl ether	CH3OCH3	115-10-6
CFC	R-211	1,1,1,2,2,3,3-Heptachloro-3-	C3FCl7	422-78-6
		fluoropropane
CFC	R-212	Hexachlorodifluoropropane	C3F2Cl6	76546-99-3
CFC	R-213	1,1,1,3,3-Pentachloro-2,2,3-	C3F3Cl5	2354-06-5
		trifluoropropane
CFC	R-214	1,2,2,3-Tetrachloro-1,1,3,3-	C3F4Cl4	2268-46-4
		tetrafluoropropane
CFC	R-215	1,1,1-Trichloro-2,2,3,3,3-	C3F5Cl3	4259-43-2
		pentafluoropropane
CFC	R-216	1,2-Dichloro-1,1,2,3,3,3-	C3F6Cl2	661-97-2
		hexafluoropropane
CFC	R-216ca	1,3-Dichloro-1,1,2,2,3,3-	C3F6Cl2	662-01-1
		hexafluoropropane
CFC	R-217	1-Chloro-1,1,2,2,3,3,3-	C3F7Cl	422-86-6
		heptafluoropropane
CFC	R-217ba	2-Chloro-1,1,1,2,3,3,3-	C3F7Cl	76-18-6
		heptafluoropropane
PFC	R-218	Octafluoropropane	C3F8	76-19-7
HCFC	R-221	1,1,1,2,2,3-Hexachloro-3-	C3HFCl6	422-26-4
		fluoropropane
HCFC	R-222	Pentachlorodifluoropropane	C3HF2Cl5	134237-36-8
HCFC	R-222c	1,1,1,3,3-Pentachloro-2,2-	C3HF2Cl5	422-49-1
		difluoropropane
HCFC	R-223	Tetrachlorotrifluoropropane	C3HF3Cl4	134237-37-9
HCFC	R-223ca	1,1,3,3-Tetrachloro-1,2,2-	C3HF3Cl4	422-52-6
		trifluoropropane
HCFC	R-223cb	1,1,1,3-Tetrachloro-2,2,3-	C3HF3Cl4	422-50-4
		trifluoropropane
HCFC	R-224	Trichlorotetrafluoropropane	C3HF4Cl3	134237-38-0
HCFC	R-224ca	1,3,3-Trichloro-1,1,2,2-	C3HF4Cl3	422-54-8
		tetrafluoropropane
HCFC	R-224cb	1,1,3-Trichloro-1,2,2,3-	C3HF4Cl3	422-53-7
		tetrafluoropropane
HCFC	R-224cc	1,1,1-Trichloro-2,2,3,3-	C3HF4Cl3	422-51-5
		tetrafluoropropane
HCFC	R-225	Dichloropentafluoropropane	C3HF5Cl2	127564-92-5
HCFC	R-225aa	2,2-Dichloro-1,1,1,3,3-	C3HF5Cl2	128903-21-9
		pentafluoropropane
HCFC	R-225ba	2,3-Dichloro-1,1,1,2,3-	C3HF5Cl2	422-48-0
		pentafluoropropane
HCFC	R-225bb	1,2-Dichloro-1,1,2,3,3-	C3HF5Cl2	422-44-6
		pentafluoropropane
HCFC	R-225ca	3,3-Dichloro-1,1,1,2,2-	C3HF5Cl2	422-56-0
		pentafluoropropane
HCFC	R-225cb	1,3-Dichloro-1,1,2,2,3-	C3HF5Cl2	507-55-1
		pentafluoropropane
HCFC	R-225cc	1,1-Dichloro-1,2,2,3,3-	C3HF5Cl2	13474-88-9
		pentafluoropropane
HCFC	R-225da	1,2-Dichloro-1,1,3,3,3-	C3HF5Cl2	431-86-7
		pentafluoropropane
HCFC	R-225ea	1,3-Dichloro-1,1,2,3,3-	C3HF5Cl2	136013-79-1
		pentafluoropropane
HCFC	R-225eb	1,1-Dichloro-1,2,3,3,3-	C3HF5Cl2	111512-56-2
		pentafluoropropane
HCFC	R-226	Chlorohexafluoropropane	C3HF6Cl	134308-72-8
HCFC	R-226ba	2-Chloro-1,1,1,2,3,3-	C3HF6Cl	51346-64-6
		hexafluoropropane
HCFC	R-226ca	3-Chloro-1,1,1,2,2,3-	C3HF6Cl	422-57-1
		hexafluoropropane
HCFC	R-226cb	1-Chloro-1,1,2,2,3,3-	C3HF6Cl	422-55-9
		hexafluoropropane
HCFC	R-226da	2-Chloro-1,1,1,3,3,3-	C3HF6Cl	431-87-8
		hexafluoropropane
HCFC	R-226ea	1-Chloro-1,1,2,3,3,3-	C3HF6Cl	359-58-0
		hexafluoropropane
HFC	R-227ca	1,1,2,2,3,3,3-Heptafluoropropane	C3HF7	2252-84-8
HFC	R-227ca2	Trifluoromethyl 1,1,2,2-	C3HF7O	2356-61-8
		tetrafluoroethyl ether
HFC	R-227ea	1,1,1,2,3,3,3-Heptafluoropropane	C3HF7	431-89-0
HFC	R-227me	Trifluoromethyl 1,2,2,2-	C3HF7O	2356-62-9
		tetrafluoroethyl ether
HCFC	R-231	Pentachlorofluoropropane	C3H2FCl5	134190-48-0
HCFC	R-232	Tetrachlorodifluoropropane	C3H2F2Cl4	134237-39-1
HCFC	R-232ca	1,1,3,3-Tetrachloro-2,2-	C3H2F2Cl4	1112-14-7
		difluoropropane
HCFC	R-232cb	1,1,1,3-Tetrachloro-2,2-	C3H2F2Cl4	677-54-3
		difluoropropane
HCFC	R-233	Trichlorotrifluoropropane	C3H2F3Cl3	134237-40-4
HCFC	R-233ca	1,1,3-Trichloro-2,2,3-	C3H2F3Cl3	131221-36-8
		trifluoropropane
HCFC	R-233cb	1,1,3-Trichloro-1,2,2-	C3H2F3Cl3	421-99-8
		trifluoropropane
HCFC	R-233cc	1,1,1-Trichloro-2,2,3-	C3H2F3Cl3	131211-71-7
		trifluoropropane
HCFC	R-234	Dichlorotetrafluoropropane	C3H2F4Cl2	127564-83-4
HCFC	R-234aa	2,2-Dichloro-1,1,3,3-	C3H2F4Cl2	17705-30-5
		tetrafluoropropane
HCFC	R-234ab	2,2-Dichloro-1,1,1,3-	C3H2F4Cl2	149329-24-8
		tetrafluoropropane
HCFC	R-234ba	1,2-Dichloro-1,2,3,3-	C3H2F4Cl2	425-94-5
		tetrafluoropropane
HCFC	R-234bb	2,3-Dichloro-1,1,1,2-	C3H2F4Cl2	149329-25-9
		tetrafluoropropane
HCFC	R-234bc	1,2-Dichloro-1,1,2,3-	C3H2F4Cl2	149329-26-0
		tetrafluoropropane
HCFC	R-234ca	1,3-Dichloro-1,2,2,3-	C3H2F4Cl2	70341-81-0
		tetrafluoropropane
HCFC	R-234cb	1,1-Dichloro-2,2,3,3-	C3H2F4Cl2	4071-01-6
		tetrafluoropropane
HCFC	R-234cc	1,3-Dichloro-1,1,2,2-	C3H2F4Cl2	422-00-5
		tetrafluoropropane
HCFC	R-234cd	1,1-Dichloro-1,2,2,3-	C3H2F4Cl2	70192-63-1
		tetrafluoropropane
HCFC	R-234da	2,3-Dichloro-1,1,1,3-	C3H2F4Cl2	146916-90-7
		tetrafluoropropane
HCFC	R-234fa	1,3-Dichloro-1,1,3,3-	C3H2F4Cl2	76140-39-1
		tetrafluoropropane
HCFC	R-234fb	1,1-Dichloro-1,3,3,3-	C3H2F4Cl2	64712-27-2
		tetrafluoropropane
HCFC	R-235	Chloropentafluoropropane	C3H2F5Cl	134237-41-5
HCFC	R-235ca	1-Chloro-1,2,2,3,3-	C3H2F5Cl	28103-66-4
		pentafluoropropane
HCFC	R-235cb	3-Chloro-1,1,1,2,3-	C3H2F5Cl	422-02-6
		pentafluoropropane
HCFC	R-235cc	1-Chloro-1,1,2,2,3-	C3H2F5Cl	679-99-2
		pentafluoropropane
HCFC	R-235da	2-Chloro-1,1,1,3,3-	C3H2F5Cl	134251-06-2
		pentafluoropropane
HCFC	R-235fa	1-Chloro-1,1,3,3,3-	C3H2F5Cl	677-55-4
		pentafluoropropane
HFC	R-236cb	1,1,1,2,2,3-Hexafluoropropane	C3H2F6	677-56-5
HFC	R-236ea	1,1,1,2,3,3-Hexafluoropropane	C3H2F6	431-63-0
HFC	R-236fa	1,1,1,3,3,3-Hexafluoropropane	C3H2F6	690-39-1
HFC	R-236me	1,2,2,2-Tetrafluoroethyl	C3H2F6O	57041-67-5
		difluoromethyl ether
HFC	R-FE-36	Hexafluoropropane	C3H2F6	359-58-0
HCFC	R-241	Tetrachlorofluoropropane	C3H3FCl4	134190-49-1
HCFC	R-242	Trichlorodifluoropropane	C3H3F2Cl3	134237-42-6
HCFC	R-243	Dichlorotrifluoropropane	C3H3F3Cl2	134237-43-7
HCFC	R-243ca	1,3-Dichloro-1,2,2-trifluoropropane	C3H3F3Cl2	67406-68-2
HCFC	R-243cb	1,1-Dichloro-2,2,3-trifluoropropane	C3H3F3Cl2	70192-70-0
HCFC	R-243cc	1,1-Dichloro-1,2,2-trifluoropropane	C3H3F3Cl2	7125-99-7
HCFC	R-243da	2,3-Dichloro-1,1,1-trifluoropropane	C3H3F3Cl2	338-75-0
HCFC	R-243ea	1,3-Dichloro-1,2,3-trifluoropropane	C3H3F3Cl2	151771-08-3
HCFC	R-243ec	1,3-Dichloro-1,1,2-trifluoropropane	C3H3F3Cl2	149329-27-1
HCFC	R-244	Chlorotetrafluoropropane	C3H3F4Cl	134190-50-4
HCFC	R-244ba	2-Chloro-1,2,3,3-tetrafluoropropane	C3H3F4Cl
HCFC	R-244bb	2-Chloro-1,1,1,2-tetrafluoropropane	C3H3F4Cl	421-73-8
HCFC	R-244ca	3-Chloro-1,1,2,2-tetrafluoropropane	C3H3F4Cl	679-85-6
HCFC	R-244cb	1-Chloro-1,2,2,3-tetrafluoropropane	C3H3F4Cl	67406-66-0
HCFC	R-244cc	1-Chloro-1,1,2,2-tetrafluoropropane	C3H3F4Cl	421-75-0
HCFC	R-244da	2-Chloro-1,1,3,3-tetrafluoropropane	C3H3F4Cl	19041-02-2
HCFC	R-244db	2-Chloro-1,1,1,3-tetrafluoropropane	C3H3F4Cl	117970-90-8
HCFC	R-244ea	3-Chloro-1,1,2,3-tetrafluoropropane	C3H3F4Cl
HCFC	R-244eb	3-Chloro-1,1,1,2-tetrafluoropropane	C3H3F4Cl
HCFC	R-244ec	1-Chloro-1,1,2,3-tetrafluoropropane	C3H3F4Cl
HCFC	R-244fa	3-Chloro-1,1,1,3-tetrafluoropropane	C3H3F4Cl
HCFC	R-244fb	1-Chloro-1,1,3,3-tetrafluoropropane	C3H3F4Cl	2730-64-5
HFC	R-245ca	1,1,2,2,3-Pentafluoropropane	C3H3F5	679-86-7
HFC	R-245cb	Pentafluoropropane	C3H3F5	1814-88-6
HFC	R-245ea	1,1,2,3,3-Pentafluoropropane	C3H3F5	24270-66-4
HFC	R-245eb	1,1,1,2,3-Pentafluoropropane	C3H3F5	431-31-2
HFC	R-245fa	1,1,1,3,3-Pentafluoropropane	C3H3F5	460-73-1
HFC	R-245mc	Methyl pentafluoroethyl ether	C3H3F5O	22410-44-2
HFC	R-245mf	Difluoromethyl 2,2,2-trifluoroethyl	C3H3F5O	1885-48-9
		ether
HFC	R-245qc	Difluoromethyl 1,1,2-trifluoroethyl	C3H3F5O	69948-24-9
		ether
HCFC	R-251	Trichlorofluoropropane	C3H4FCl3	134190-51-5
HCFC	R-252	Dichlorodifluoropropane	C3H4F2Cl2	134190-52-6
HCFC	R-252ca	1,3-Dichloro-2,2-difluoropropane	C3H4F2Cl2	1112-36-3
HCFC	R-252cb	1,1-Dichloro-2,2-difluoropropane	C3H4F2Cl2	1112-01-2
HCFC	R-252dc	1,2-Dichloro-1,1-difluoropropane	C3H4F2Cl2
HCFC	R-252ec	1,1-Dichloro-1,2-difluoropropane	C3H4F2Cl2
HCFC	R-253	Chlorotrifluoropropane	C3H4F3Cl	134237-44-8
HCFC	R-253ba	2-Chloro-1,2,3-trifluoropropane	C3H4F3Cl
HCFC	R-253bb	2-Chloro-1,1,2-trifluoropropane	C3H4F3Cl
HCFC	R-253ca	1-Chloro-2,2,3-trifluoropropane	C3H4F3Cl	56758-54-4
HCFC	R-253cb	1-Chloro-1,2,2-trifluoropropane	C3H4F3Cl	70192-76-6
HCFC	R-253ea	3-Chloro-1,1,2-trifluoropropane	C3H4F3Cl
HCFC	R-253eb	1-Chloro-1,2,3-trifluoropropane	C3H4F3Cl
HCFC	R-253ec	1-Chloro-1,1,2-trifluoropropane	C3H4F3Cl
HCFC	R-253fa	3-Chloro-1,3,3-trifluoropropane	C3H4F3Cl
HCFC	R-253fb	3-Chloro-1,1,1-trifluoropropane	C3H4F3Cl	460-35-5
HCFC	R-253fc	1-Chloro-1,1,3-trifluoropropane	C3H4F3Cl
HFC	R-254cb	1,1,2,2-Tetrafluoropropane	C3H4F4	40723-63-5
HFC	R-254pc	Methyl 1,1,2,2-tetrafluoroethyl	C3H4F4O	425-88-7
		ether
HCFC	R-261	Dichlorofluoropropane	C3H5FCl2	134237-45-9
HCFC	R-261ba	1,2-Dichloro-2-fluoropropane	C3H5FCl2	420-97-3
HCFC	R-262	Chlorodifluoropropane	C3H5F2Cl	134190-53-7
HCFC	R-262ca	1-Chloro-2,2-difluoropropane	C3H5F2Cl	420-99-5
HCFC	R-262fa	3-Chloro-1,1-difluoropropane	C3H5F2Cl
HCFC	R-262fb	1-Chloro-1,3-difluoropropane	C3H5F2Cl
HFC	R-263	Trifluoropropane	C3H5F3
HCFC	R-271	Chlorofluoropropane	C3H6FCl	134190-54-8
HCFC	R-271b	2-Chloro-2-fluoropropane	C3H6FCl	420-44-0
HCFC	R-271d	2-Chloro-1-fluoropropane	C3H6FCl
HCFC	R-271fb	1-Chloro-1-fluoropropane	C3H6FCl
HFC	R-272	Difluoropropane	C3H6F2
HFC	R-281	Fluoropropane	C3H7F
HC	R-290	Propane	C3H8 or CH3CH2CH3	74-98-6
CFC	R-C316	Dichlorohexafluorocyclobutane	C4Cl2F6	356-18-3
CFC	R-C317	Chloroheptafluorocyclobutane	C4ClF7	377-41-3
PFC	R-C318	Octafluorocyclobutane	C4F8 or —(CF2)4—	115-25-3
		(Perfluorocyclobutane)
PFC	R-3-1-10	Decafluorobutane (Perfluorobutane)	C4F10	355-25-9
HFC	R-329ccb	1,1,1,2,2,3,3,4,4-Nonafluorobutane	C4HF9	375-17-7
HFC	R-338eea	1,1,1,2,3,4,4,4-Octafluorobutane	C4H2F8	75995-72-1
HFC	R-347ccd	1,1,1,2,2,3,3-Heptafluorobutane	C4H3F7	662-00-0
HFC	R-347mcc	Perfluoropropyl methyl ether	C4H3F7O	375-03-1
HFC	R-347mmy	Perfluoroisopropyl methyl ether	C4H3F7O	22052-84-2
HFC	R-365mfc	1,1,1,3,3-Pentafluorobutane	C4H5F5	406-58-6
PFC	R-4-1-12	Dodecafluoropentane	C5F12	678-26-2
		(Perfluoropentane)
PFC	R-5-1-14	Tetradecafluorohexane	C6F14	355-42-0
		(Perfluorohexane)
CFC	R-400	R-12/114(50/50 wt %) OR	50% CCl2F2•50% C2F4Cl2 OR
		(60/40)(must be specified)	60% CCl2F2•40% C2F4Cl2
HCFC	R-401A	R-22/152a/124	53 ± 2% CHClF2•13 +	MP-39[6][19]
		(53 ± 2/13 + .5, −1.5/34 ± 1)	.5, −1.5% C2H4F2•34 ± 1% C2HF4Cl
HCFC	R-401B	R-22/152a/124	61 ± 2% CHClF2•11 +	MP-66[6][19]
		(61 ± 2/11 + .5, −1.5/28 ± 1)	.5, −1.5% C2H4F2•28 ± 1% C2HF4Cl
HCFC	R-401C	R-22/152a/124	33 ± 2% CHClF2•15 +	MP-52[19]
		(33 ± 2/15 + .5, −1.5/52 ± 1)	.5, −1.5% C2H4F2•52 ± 1% C2HF4Cl
HCFC	R-402A	R-125/290/22	60 ± 2% C2HF5•2 ±	HP-80[6][19]
		(60 ± 2/2 ± 1/38 ± 2)	1% C3H8•38 ± 2% CHClF2
HCFC	R-402B	R-125/290/22	38 ± 2% C2HF5•2 ±	HP-81[6][19]
		(38 ± 2/2 ± 1/60 ± 2)	1% C3H8•60 ± 2% CHClF2
HCFC	R-403A	R-290/22/218	5 + .2, −2% C3H8•75 ±	ISCEON 69-S[6]
		(5 + .2, −2/75 ± 2/20 ± 0)	2% CHClF2•20 ± 0% C3F8
HCFC	R-403B	R-290/22/218	5 + .2, −2% C3H8•56 ±	ISCEON 69-L[6]
		(5 + .2, −2/56 ± 2/39 ± 0)	2% CHClF2•39 ± 0% C3F8
HFC	R-404A	R-125/143a/134a	44 ± 2% C2HF5•52 ±	HP-62,[6][19] FX-
		(44 ± 2/52 ± 1/4 ± 2)	1% C2H3F3•4 ± 2% C2H2F4	70[6][19]
HCFC	R-405A	R-22/152a/142b/C318	45 ± 0% CHClF2•7 ± 1% C2H4F2•5.5 ±	GREENCOOL
		(45 ± 0/7 ± 1/5.5 ± 1/42.5 ± 2)	1% C2H3F2Cl•42.5 ± 2% C4F8	G2015[6]
HCFC	R-406A	R-22/600a/142b	55 ± 2% CHClF2•4 ±	GHG[6][19]
		(55 ± 2/4 ± 1/41 ± 0)	1% C4H10•41 ± 0% C2H3F2Cl
HCFC	R-406B	R-22/600a/142b	65 ± 2% CHClF2•4 ±	GHG-HP[6]
		(65 ± 2/4 ± 1/31 ± 0)	1% C4H10•31 ± 0% C2H3F2Cl
HFC	R-407A	R-32/125/134a	20 ± 2% CH2F2•40 ±	Klea 60[6][19]
		(20 ± 2/40 ± 2/40 ± 2)	2% C2HF5•40 ± 2% C2H2F4
HFC	R-407B	R-32/125/134a	10 ± 2% CH2F2•70 ±	Klea 61[6]
		(10 ± 2/70 ± 2/20 ± 2)	2% C2HF5•20 ± 2% C2H2F4
HFC	R-407C	R-32/125/134a	23 ± 2% CH2F2•25 ±	Klea 66,[6]
		(23 ± 2/25 ± 2/52 ± 2)	2% C2HF5•52 ± 2% C2H2F4	AC9000[19]
HFC	R-407D	R-32/125/134a	15 ± 2% CH2F2•15 ±
		(15 ± 2/15 ± 2/70 ± 2)	2% C2HF5•70 ± 2% C2H2F4
HFC	R-407E	R-32/125/134a	25 ± 2% CH2F2•15 ±
		(25 ± 2/15 ± 2/60 ± 2)	2% C2HF5•60 ± 2% C2H2F4
HFC	R-407F	R-32/125/134a	30 ± 2% CH2F2•30 ±	Genetron
		(30 ± 2/30 ± 2/40 ± 2)	2% C2HF5•40 ± 2% C2H2F4	Performax LT[9]
HCFC	R-408A	R-125/143a/22	7 ± 2% C2HF5•46 ±	FX-10[6][19]
		(7 ± 2/46 ± 1/47 ± 2)	1% C2H3F3•47 ± 2% CHClF2
HCFC	R-409A	R-22/124/142b	60 ± 2% CHClF2•25 ±	FX-56[6][19]
		(60 ± 2/25 ± 2/15 ± 1)	2% C2HF4Cl•15 ± 1% C2H3F2Cl
HCFC	R-409B	R-22/124/142b	65 ± 2% CHClF2•25 ±	FX-57[6]
		(65 ± 2/25 ± 2/10 ± 1)	2% C2HF4Cl•10 ± 1% C2H3F2Cl
HFC	R-410A	R-32/125	50 + .5, −1.5% CH2F2•50 +	AZ-20,[6] Puron,[6]
		(50 + .5, −1.5/50 + 1.5, −.5)	1.5, −.5% C2HF5	Suva 9100[6]
HFC	R-410B	R-32/125	45 ± 1% CH2F2•55 ± 1% C2HF5	AC9100[19]
		(45 ± 1/55 ± 1)
HCFO	R-411A	R-1270/22/152a	1.5 + 0, −1% C3H6•87.5 +	GREENCOOL
		(1.5 + 0, −1/87.5 + 2, −0/11 + 0, −1)	2, −0% CHClF2•11 + 0, −1% C2H4F2	G2018a[6]
HCFO	R-411B	R-1270/22/152a	3 + 0, −1% C3H6•94 +	GREENCOOL
		(3 + 0, −1/94 + 2, −0/3 + 0, −1)	2, −0% CHClF2•3 + 0, −1% C2H4F2	G2018b[6]
HCFO	R-411C	R-1270/22/152a	3 + 0, −1% C3H6•95.5 +	GREENCOOL
		(3 + 0, −1/95.5 + 2, −0/1.5 + 0, −1)	2, −0% CHClF2•1.5 + 0, −1% C2H4F2	G2018c[6]
HCFC	R-412A	R-22/218/142b	70 ± 2% CHClF2•5 ±	Arcton TP5R[6]
		(70 ± 2/5 ± 2/25 ± 1)	2% C3F8•25 ± 1% C2H3F2Cl
HFC	R-413A	R-218/134a/600a	9 ± 1% C3F8•88 ±	ISCEON 49[6]
		(9 ± 1/88 ± 2/3 + 0, −1)	2% C2H2F4•3 + 0, −1% C4H10
HCFC	R-414A	R-22/124/600a/142b	51 ± 2% CHClF2•28.5 ±	GHG-X4,[6]
		(51 ± 2/28.5 ± 2/4 ± .5/16.5 + .5, −1)	2% C2HF4Cl•4 ± .5% C4H10•16.5 +	Autofrost,[6] Chill-
			.5, −1% C2H3F2Cl	It[6]
HCFC	R-414B	R-22/124/600a/142b	50 ± 2% CHClF2•39 ±	Hot Shot,[6][19] Kar
		(50 ± 2/39 ± 2/1.5 ± .5/9.5 + .5, −1)	2% C2HF4Cl•1.5 ± .5% C4H10•9.5 +	Kool[6]
			.5, −1% C2H3F2Cl
HCFC	R-415A	R-22/152a (82 ± 1/18 ± 1)	82 ± 1% CHClF2•18 ± 1% C2H4F2
HCFC	R-415B	R-22/152a (25 ± 1/75 ± 1)	25 ± 1% CHClF2•75 ± 1% C2H4F2
HCFC	R-416A	R-134a/124/600	59 + .5, −1% C2H2F4•39.5 +	FRIGC (FR-12)[6]
		(59 + .5, −1/39.5 + 1, −.5/1.5 + 1 , −.2)	1, −.5% C2HF4Cl•1.5 + .1, −.2% C4H10
HFC	R-417A	R-125/134a/600	46.6 ± 1.1% C2HF5•50 ±	ISCEON 59,[6]
		(46.6 ± 1.1/50 ± 1/3.4 + .1, −.4)	1% C2H2F4•3.4 + .1, −.4% C4H10	NU-22[6]
HFC	R-417B	R-125/134a/600	79 ± 1% C2HF5•18.3 ±
		(79 ± 1/18.3 ± 1/2.7 + .1, −.5)	1% C2H2F4•2.7 + 1, −.5% C4H10
HCFC	R-418A	R-290/22/152a	1.5 ± .5% C3H8•96 ±
		(1.5 ± .5/96 ± 1/2.5 ± .5)	1% CHClF2•2.5 ± .5% C2H4F2
HFC	R-419A	R-125/134a/E170	77 ± 1% C2HF5•19 ±
		(77 ± 1/19 ± 1/4 ± 1)	1% C2H2F4•4 ± 1% C2H6O
HCFC	R-420A	R-134a/142b	88 + 1, −0% C2H2F4•12 +	Choice
		(88 + 1, −0/12 + 0, −1)	0, −1% C2H3F2Cl	Refrigerant[19]
HFC	R-421A	R-125/134a (58 ± 1/42 ± 1)	58 ± 1% C2HF5•42 ± 1% C2H2F4	Choice R421 A[19]
HFC	R-421B	R-125/134a (85 ± 1/15 ± 1)	85 ± 1% C2HF5•15 ± 1% C2H2F4	Choice 421B[19]
HFC	R-422A	R-125/134a/600a	85.1 ± 1% C2HF5•11.5 ±	ISCEON 79[19]
		(85.1 ± 1/11.5 ± 1/3.4 + .1, −.4)	1% C2H2F4•3.4 + .1, −.4% C4H10
HFC	R-422B	R-125/134a/600a	55 ± 1% C2HF5•42 ±	ICOR XAC1[19]
		(55 ± 1 /42 ± 1/3 + .1, −.5)	1% C2H2F4•3 + .1, −.5% C4H10
HFC	R-422C	R-125/134a/600a	82 ± 1% C2HF5•15 ±	ICOR XLT1[19]
		(82 ± 1/15 ± 1/3 + .1, −.5)	1% C2H2F4•3 + .1, −.5% C4H10
HFC	R-422D	R-125/134a/600a	65.1 + .9, −1.1% C2HF5•31.5 ±	ISCEON MO29[19]
		(65.1 + .9, −1.1/31.5 ± 1/3.4 + .1, −.4)	1% C2H2F4•3.4 + .1, −.4% C4H10
HFC	R-423A	R-134a/227ea (52.5 ± 1/47.5 ± 1)	52.5 ± 1% C2H2F4•47.5 ± 1% C3HF7
HFC	R-424A	R-125/134a/600a/600/601a	50.5 ± 1% C2HF5•47 ±	RS-44 (new
		(50.5 ± 1/47 ± 1/.9 + .1, −.2/	1% C2H2F4•1.9 + .3, −.1% C4H10•.6 +	comp.)[19]
		1 + .1, + .2/.6 + .1, −.2)	.1, −.2% C5H12
HFC	R-425A	R-32/134a/227ea	18.5 ± .5% CH2F2•69.5 ±
		(18.5 ± .5/69.5 ± .5/12 ± .5)	.5% C2H2F4•12 ± .5% C3HF7
HFC	R-426A	R-125/134a/600/601a	5.1 ± 1% C2HF5•93 ±	RS-24 (new
		(5.1 ± 1/93 ± 1/1.3 + .1, −.2/.6 + .1, −.2)	1% C2H2F4•1.3 + .1, −.2% C4H10•.6 +	comp.)[19]
			.1, −.2% C5H12
HFC	R-427A	R-32/125/143a/134a	15 ± 2% CH2F2•25 ±	Forane 427A[19]
		(15 ± 2/25 ± 2/10 ± 2/50 ± 2)	2% C2HF5•10 ± 2% C2H3F3•50 ± 2% C2H2F4
HFC	R-428A	R-125/143a/290/600a	77.5 ± 1% C2HF5•20 ±	RS-52[19]
		(77.5 ± 1/20 ± 1/.6 + .1, −.2/1.9 + .1, −.2)	1% C2H3F3•.6 + .1, −.2% C3H8•1.9 +
			.1, −.2% C4H10
HFC	R-429A	R-E170/152a/600a	60 ± 1% C2H6O•10 ±
		(60 ± 1/10 ± 1/30 ± 1)	1% C2H4F2•30 ± 1% C4H10
HFC	R-430A	R-152a/600a (76 ± 1/24 ± 1)	76 ± 1% C2H4F2•24 ± 1% C4H10
HFC	R-431A	R-290/152a (71 ± 1/29 ± 1)	71 ± 1% C3H8•29 ± 1% C2H4F2
HO	R-432A	R-1270/E170 (80 ± 1/20 ± 1)	80 ± 1% C3H6•20 ± 1% C2H6O
HO	R-433A	R-1270/290 (30 ± 1/70 ± 1)	30 ± 1% C3H6•70 ± 1% C3H8
HO	R-433B	R-1270/290 (5 ± 1/95 ± 1)	5 ± 1% C3H6•95 ± 1% C3H8
HO	R-433C	R-1270/290 (25 ± 1/75 ± 1)	25 ± 1% C3H6•75 ± 1% C3H8
HFC	R-434A	R-125/143a/134a/600a	63.2 ± 1% C2HF5•18 ±	RS-45[19]
		(63.2 ± 1/18 ± 1/16 ± 1/2.8 + .1, −.2)	1% C2H3F3•16 ± 1% C2H2F4•2.8 +
			.1, −.2% C4H10
HFC	R-435A	R-E170/152a (80 ± 1/20 ± 1)	80 ± 1% C2H6O•20 ± 1% C2H4F2
HC	R-436A	R-290/600a (56 ± 1/44 ± 1)	56 ± 1% C3H8•44 ± 1% C4H10
HC	R-436B	R-290/600a (52 ± 1/48 ± 1)	52 ± 1% C3H8•48 ± 1% C4H10
HFC	R-437A	R-125/134a/600/601	19.5 + .5, −1.8% C2HF5•78.5 +
		(19.5 + .5, −1.8/78.5 + 1.5, −.7/	1.5, −.7% C2H2F4•1.4 +
		1.4 + .1, −.2/.6 + .1, −.2)	.1, −.2% C4H10•.6 + .1, −.2% C5H12
HFC	R-438A	R-32/125/134a/600/601a	8.5 + .5, −1.5% CH2F2•45 ±	KDD5,[19]
		(8.5 + .5, −1.5/45 ± 1.5/44.2 ±	1.5% C2HF5•44.2 ± 1.5% C2H2F4•1.7 +	ISCEON MO99[19]
		1.5/1.7 + .1, −.2/.6 + .1, −.2)	.1, −.2% C4H10•.6 + .1, −.2% C5H12
HFC	R-439A	R-32/125/600a	50 ± 1% CH2F2•47 ±
		(50 ± 1/47 ± 1/3 ± .5)	1% C2HF5•3 ± .5% C4H10
HFC	R-440A	R-290/134a/152a	.6 ± .1% C3H8•1.6 ±
		(.6 ± .1/1.6 ± .6/97.8 ± .5)	.6% C2H2F4•97.8 ± .5% C2H4F2
HC	R-441A	R-170/290/600a/600	3.1 ± .3% C2H6•54.8 ±	HCR-188C[19]
		(3.1 ± .3/54.8 ± 2/6 ± .6/36.1 ± 2)	2% C3H8•42.1 ± 2.6% C4H10
HCFC	R-500	R-12/152a (73.8/26.2)	73.8% CCl2F2•26.2% C2H4F2	Carrene #7[6]
HCFC	R-501	R-22/12 (75/25)	75% CHClF2•25% CCl2F2
HCFC	R-502	R-22/115 (48.8/51.2)	48.8% CHClF2•51.2% C2F5Cl
HCFC	R-503	R-23/13 (40.1/59.9)	40.1% CHF3•59.9% CClF3
HCFC	R-504	R-32/115 (48.2/51.8)	48.2% CH2F2•51.8% C2F5Cl
HCFC	R-505	R-12/31 (78/22)	78% CCl2F2•22% CH2FCl
HCFC	R-506	R-31/114 (55.1/44.9)	55.1% CH2FCl•44.9% C2F4Cl2
HFC	R-507[A]	R-125/143a (50/50)	50% C2HF5•50% C2H3F3	AZ-50[6][19]
HFC	R-508[A]	R-23/116 (39/61)	39% CHF3•61% C2F6	Klea 5R3[6][19]
HFC	R-508B	R-23/116 (46/54)	46% CHF3•54% C2F6	Suva 95[6][19]
HCFC	R-509[A]	R-22/218 (44/56)	44% CHClF2•56% C3F8	Arcton TP5R2[6]
HC	R-510[A]	R-E170/600a (88 ± .5/12 ± .5)	88 ± .5% C2H6O•12 ± .5% C4H10
HC	R-511[A]	R-290/E170 (95 ± 1/5 ± 1)	95 ± 1% C3H8•5 ± 1% C2H6O
HC	R-600	Butane	C4H10 or CH3CH2CH2CH3	106-97-8
HC	R-600a	Isobutane	C4H10 or CH(CH3)2CH3	75-28-5
HC	R-601	Pentane	C5H12 or CH3CH2CH2CH2CH3	109-66-0
HC	R-601a	Isopentane	C5H12 or (CH3)2CHCH2CH3	78-78-4
HC	R-610	Ethoxyethane (Diethyl ether)	CH3CH2OCH2CH3	60-29-7
HC	R-611	Methyl formate	HCOOCH3	107-31-3
	R-630	Methylamine	CH3NH2	74-89-5
	R-631	Ethylamine	CH3CH2(NH2)	75-04-7
	R-702	Hydrogen	H2	1333-74-0
	R-704	Helium	He	7440-59-7
	R-717	Ammonia	NH3	7664-41-7
	R-718	Water/Steam	H2O	7732-18-5
	R-720	Neon	Ne	7440-01-9
	R-728	Nitrogen	N2	7727-37-9
	R-729	Air N2/O2/Ar	78.082% N2•20.945% O2•.934% Ar
		(78.082/20.945/.934 vol %)
	R-732	Oxygen	O2	7782-44-7
	R-740	Argon	Ar	7440-37-1
	R-744	Carbon dioxide	CO2	124-38-9
	R-744A	Nitrous oxide	N2O	10024-97-2
	R-764	Sulfur dioxide	SO2	7446-09-5
	R-784	Krypton	Kr	7439-90-9
CFO	R-1112a	1,1-Dichloro-2,2-difluoroethylene	C2Cl2F2	79-35-6
CFO	R-1113	Chlorotrifluoroethylene	C2ClF3	79-38-9
PFO	R-1114	Tetrafluoroethylene	C2F4	116-14-3
HCO	R-1120	Trichloroethylene (trielene)	C2HCl3	79-01-6
HCO	R-1130	cis-1,2-Dichloroethylene	C2H2Cl2	156-59-2
HFO	R-1132a	1,1-Difluoroethylene	C2H2F2	75-38-7
HCO	R-1140	Chloroethylene (vinyl chloride)	C2H3Cl	75-01-4
HFO	R-1141	Fluoroethylene (vinyl fluoride)	C2H3F	75-02-5
HO	R-1150	Ethene (Ethylene)	CH2═CH2	74-85-1
PFO	R-1216	Hexafluoropropylene	C3F6	116-15-4
PFO	R-1218	Hexafluoropropene trimer	(C3F6)3	6792-31-0
HCFO	R-1233zd	1-Chloro-3,3,3-trifluoropropene	C3H2ClF3	2730-43-0
HFO	R-1234yf	2,3,3,3-Tetrafluoropropene	C3H2F4	754-12-1
HFO	R-1234ze	1,3,3,3-Tetrafluoropropene	C3H2F4	1645-83-6
HO	R-1270	Propene (Propylene)	C3H6 or CH3CH═CH2	115-07-1

[1] Composition of Refrigerant Blends, www.epa.gov/ozone/snap/refrigerants/refblend.html

[2] Andy's HVAC/R Web Page, users.isp.com/aschoen/refchart.pdf

	Type	Meaning	Atoms in the Molecule
	CFC	Chlorofluorocarbon	Cl, F, C
	CFO	Chlorofluoroolefin
	HCFC	Hydrochlorofluorocarbon	H, Cl, F, C
	HCFO	Hydrochlorofluoroolefin
	HFC	Hydrofluorocarbon	H, F, C
	HFO	Hydrofluoroolefin
	HCC	Hydrochlorocarbon	H, Cl, C
	HCO	Hydrochloroolefin
	HC	Hydrocarbon	H, C
	HO	Hydroolefin (Alkene)
	PFC	Perfluorocarbon	F, C
	PFO	Perfluoroolefin
	PCC	Perchlorocarbon	Cl, C
	PCO	Perchloroolefin
	H	Halon/Haloalkane	Br, Cl (in some but not all), F,
			H (in some but not all), C