Keep in mind that the longer the refrigerant lines are, the larger the evaporator(s) the more oil will be out in the “circuit” and the more total oil the system will need to contain. Viper Condensate Pan and Drain Treatment is a sprayable gel. Ten (10) different refrigerants and fourteen (14) different lubricants were investigated. Oil type, properties and quality 2. Type M is not used because the wall is too thin. Always check the compressor manufacture's recommendations for oil on any other type … a. It is more hygroscopic that either POE or PVE oils, but like PVE it does not undergo hydrolysis in the presence of water. Derived from refrigeration grade lubricants. There are different types of compressor: Positive displacement and; Dynamic compressor A refrigeration system is a combination of components and equipment connected in a sequential order to produce the refrigeration effect. One thing that has become clear with the advent of POE oil is the importance of proper brazing practices (flowing nitrogen), proper deep evacuation and keeping the oil away from air and moisture during storage. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. FMI –2010 Energy & Store Development Conference HFC Component Comparison 1 –Relative to R-22, Standard Cycle @ 105 F Condenser, 25 F Evaporator, 10 F of Superheat & Subcooling 2 –From the IPCC AR4 3 –L Sub-classification Under Public Review Cond. It is compatible with mineral oil and compared to mineral oil, it has improved refrigerant miscibility with R-22 at low-temperature conditions. Most of the time new compressors will come prefilled with oil but if they are not or you need to add oil to your system then please please use what the compressor calls for. Get the (near) daily Tech Tip email right in your inbox! From oil type to air conditioning compressor type MAHLE reference number/ former Behr Hella Service reference number Product Viscosity class Contents Can be used for refrigerant Can be used for Can be used for air conditioning compressor types PAG oil ACPL 1 000P 8FX 351 213-031 PAG oil ISO 46 240 ml R134a Air conditioning systems in vehicles As I stated above the primary users of PAG oil are automotive applications. Choose from 67 different sets of refrigerants and oils flashcards on Quizlet. Lastly, just like POE oils PAG oils are hygroscopic and can absorb moisture at a much faster rate than mineral oil. Miscibility – the ability of the oil to mix with and move with the refrigerant. b. Compacted bead type driers can use XH6 or XH9 molecular sieve material such as found in the … If we could, we would keep 100% of the oil in the compressor but since that is generally unrealistic we need to utilize oils and oil strategies that will circulate the oil through the system and return it back to the compressor where it belongs on a regular and continuous basis. HFC refrigerants on the market today are the primary users of POE oil. Naphthene based mineral oils are suitable for refrigeration systems using CFC or HCFC refrigerants and has been the standard oil used for generations. Overview of oil types This document presents an overview of oil types and their technical specifications for Danfoss Com-mercial Compressors. In an automotive engine, motor oil stays in the crankcase where it belongs. In some instances there are some HFC refrigerants and compressors out there that were designed as drop-in replacements for older HCFC units. If refrigerant oil did the same thing—that is, if it remained in the © 2017 HVAC School All Rights Reserved. Maintain proper oil return through proper pipe sizing, pitching and trapping (as required) and by maintaining appropriate deisgn velocity of the refrigerant. When oil top-up is needed, always use the oil type as listed in the below table. Adjust the refrigerant charge if needed. the oil performance in the compressor as well as in the refrigeration plant as a whole. It is very important to keep moisture away from hygroscopic oils to keep them from becoming contaminated. Refrigerants CFC R11, R12, R13, R131b1, R113, R114, R500, R502, R503 Because of this the time allowed for the compressor to be exposed to the atmosphere is much much shorter than what you may be used to for R-22. a hundred of tons or 350kW). One good practice to use when running long runs of horizontal piping is to pitch it back towards the compressors. Once the oil has left the compressor it must circulate through the system and return to the compressor crankcase and there are a few key factors that impact oil return-. A flooded start is flooding that occurs during startup when liquid refrigerant was allowed to collect in the compressor, in the suction line or even in the evaporator. This all changed when the phase out of CFC/HCFC refrigerants began in the 1990’s and 2000’s. Quick, accurate flaring equipped with high-performance, large capacity lithium battery, adjustable speed control and quick-connect, it makes flaring easy and enjoyable, while guaranteeing accurate and consistent flaring. Even though the refrigerant is the working fluid required for cooling, the lubricant or oil is needed for lubrication of the compressor’s moving mechanical parts. This is a common-sense practice no matter the oil, refrigerant or application whenever possible. Find out more about the Innovative NAVAC line of Vacuum Pumps. This could eventually cause failure of the compressor and other components due to little or no lubrication. Viscosity – a measure of the oil’s flow resistance (how thick it is). eval(ez_write_tag([[300,600],'refrigeranthq_com-large-leaderboard-1','ezslot_2',112,'0','0']));report this ad. In … The properties of the oil selected must be suitable for this purpose. Now don’t forget to complete the paperwork and label the system with the new type of refrigerant used. As always if you see something that I missed or something that is incorrect please reach out to me by clicking this link. These types of oils have been used in refrigeration for decades. In these cases, a “Y” is added to the type designation of the compressor. Each Danfoss oil is specifically selected and tuned with additives for optimal performance in the indicated compressor series. and types of POEs in refrigeration compressors is relatively new and nearly all chemical and additive formulations of current refrigeration grade POE lubricants are proprietary. Suniso GS oils can be applied in commercial as well as in residential refrigeration and air conditioning systems. (Please note that while Alkyl Benzene oil can be used as a replacement in most mineral oil applications these two oils are not the exact same. The extent to which these dissolve in the compressor oil varies for the different components. Oil is used in refrigeration systems to lubricate compressor bearings and other moving parts. BITZER compressors which are intended for use with chlorine-free HFC and HFO refrigerants (R134a, R404A, R407A/C/F, R507A, R1234yf, R513A, R450A etc.) Let’s take some time and find out. Since it is composed of a highly efficient polyoil ester base oil originally developed by Nippon Oil, it has a high miscibility with HFCs and achieves excellent properties with Oil content in the system usually can reach ranges from 1 to 5% and in special cases also higher values. Similarly, other types of compressors also rely on oil for lubrication and for providing a seal when compressing the refrigerant vapor. Mineral oils can also be used with other refrigerants such as Ammonia or some Hydrocarbons as well. Polyolester (POE) – The most common oil utilized in refrigeration and air conditioning systems using HFC / HFO refrigerants. It is compatible with mineral oil and compared to mineral oil, it has improved refrigerant miscibility at low-temperature conditions which is why it was and is often used with HCFC refrigerants in commercial refrigeration. One last point of note is that POE oils absorb moisture at a much faster rate than mineral oil. A refrigerant mixture consists of two or more components. It coats the pan, p-trap and drain piping with a lubricative film to improve flow and prevent future soil adhesion. This content is provided 'As is' and is subject to change or removal at any time. DISCLOSURE: I may be an affiliate for products that I recommend. This often occurs when a new compressor is installed with a new oil charge on a system that previously had oil return issues. Regardless of what I have said above the safest method for when choosing an oil to use in your refrigeration unit is to follow the instructions on the compressor. It is also suitable for systems using CFC, HCFC refrigerants. explain the operation of split system installation valves. Now, this does vary based on the compressor type, system and oil type, but is a generally accepted rule in the absence of a more detailed guideline. What kind of refrigerant you are working with. Hard drawn copper tubing is used for halocarbon refrigeration systems. The nominal size is based on the outside diameter (OD). What the manufacturer of the compressor calls for. In fact, I oftentimes am able to negotiate a lower rate (or bonuses) not available elsewhere. One drop of Nylog on your rubber hose gaskets prior to attaching your core tools, hoses or vacuum gauge will assure that things do not bind or leak during evacuation. This has been proven to be a myth, and to some extent manufacturers of retrofit, refrigerants have been suggesting adding small amounts of POE to mineral oil to help carry it through the system. Until recently mineral oils were the default lubricant used in refrigeration systems. Oil minimizes mechanical wear by reducing friction. When using hydrocarbon refrigerants it is essential to use refrigerant grade products only. Heat pumps could also benefit from CO 2 due to the higher temperature that can be obtained even at very low ambient temperatures. How Much Is R-1234yf Refrigerant Per Pound in 2021? In systems where the refrigerant charge is small in comparison to the oil volume, this difference in solubility may lead to problems. Certain content that appears on this site comes from Amazon Services LLC. Keep the oil from overheating and keep the compressor from “throwing” oil by preventing flooding. This site uses Akismet to reduce spam. Thanks for reading and I hope that I was able to answer your questions. Residential and light commercial HVAC techs may take the approach that it’s the “manufacturers job” to ship the system with the correct amount of oil but may fail to read long line guidelines that call for more oil to be added. It is more hygroscopic than POE oil, but PVE oil does not undergo hydrolysis in the presence of water. For example, POE oil decomposes into acids and alcohol in the presence of water which means that the once it decomposes it cannot be reconstituted with line driers or evacuation. In some instances the mixed oil doesn’t flow correctly and you could end up with the same result as before of having it pile up in your evaporator instead of circulating and again potentially causing damage to the system. While these synthetic oils have been around for decades they were always seen as too expensive when it came to using in CFC or HCFC systems. So we are left with circulating oil through the system and returning it to the compressor as a regular part of A/C and refrigeration system operation under normal running conditions. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. How Much Is R-22 Refrigerant Per Pound in 2021? A major forthcoming CO 2 application seems to be air conditioning in the automotive industry. Alkylbenzene (AB) – a synthetic oil suitable for refrigeration systems using CFC or HCFC refrigerants. Alkylbenzene (AB) – a synthetic oil suitable for refrigeration systems using CFC or HCFC refrigerants. When HFC refrigerants began to gain popularity the use of mineral oils started to decline. The compressor requires oil for lubrication of the moving parts in the compressor. It is used in R-134a air conditioning systems to lubricate the compressor. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Oil/refrigerant miscibility (how well the oil mixes and moves with the refrigerant), Refrigerant velocity throughout the circuit. refrigerants with limited solubility (e.g. Learn refrigerants and oils with free interactive flashcards. Mineral oil worked well with refrigerants that contained Chlorine but is not miscible with modern HFC and HFO refrigerants. In order to determine the correct PAG viscosity for your vehicle you will need to look up the specifications of your make and model of your vehicle either online or in the instruction manual. In VERY large systems such as chillers, we are beginning to see oilless technologies with magnetic bearings like TurboCor from Danfoss (shown above), but these are still pretty rare in the field. The table below shows each type. There are many different types of oil that are used in the refrigeration cycle and it all depends mostly on two things: But, what are the different kinds of oils out there? As mentioned in our mineral oil section the POE oil was selected for HFC usage to achieve acceptable miscibility between the refrigerant and the oil and also to provide sufficient lubrication to the compressor. On the other hand, too much oil can also lead to compressor issues and poor system performance. R 22) special precautions should be taken while designing the system to ensure oil return to the compressor i) Dilelectric strength: This is an important property for systems using hermetic So, what type of refrigerant is used in chillers most often? Hygroscopic – Many modern oils are hygroscopic which means they attract and hold moisture. The new compressor will only add more oil to the circuit making the situation worse and again leading to a reoccurring failure. The vast number of refrigerants available in the market today allows us to choose a refrigerant depending upon the operating conditions of the refrigeration system. We should consistently monitor discharge temperatures exiting the compressor to ensure it doesn’t exceed 225° which equates to around 300° at the compressor discharge valves (on a reciprocating compressor). Pressures (%) 1 V. R. Capacity (%) 1 COP (%) 1 Mass Flow Rate (%) 1 Discharge Temps (°F) 1 GWP (100 year) 2 The compressor type, the efficiency of the oil separator, the design of the refrigeration system, the operating parame-ters, the refrigeration oil selection etc. Another factor in lubrication is oil breakdown that can occur at high temperatures. This is called “flooding” and it can occur while the system is running when the refrigerant superheat is allowed to stay at zero as it enters the compressor which indicates the presence of liquid refrigerant mixed with the suction vapor. Compressor type 4. The Trucking Industry & the Coming Shortage of R-134a. How Much Is R-404A Refrigerant Per Pound in 2021? They are We are tasked with preventing liquid refrigerant from entering the compressor which can cause more rapid and potentially catastrophic oil loss. Verify the superheat setting. VENOM PACK CONDENSER Alkyl Benzene Oils (AB) Alkyl benzene oil types were the first synthetic oils to be used in the refrigeration industry. Summary Table. When oil does not return properly to the compressor it can cause compressor wear but it can also decrease system performance by coating the inside of the evaporator tubing walls and inhibiting heat transfer and can even cause restrictions. are charged with a high-quality polyolester oil. are responsible for varying amounts of oil present in the refrigerant circuit. Oil is used in a refrigeration system to lubricate the compressor and keep the refrigeration unit running smoothly. Naphthene based mineral oils are suitable for refrigeration systems using CFC or HCFC refrigerants. Lastly, some companies have stated that it is ok to mix oils like Mineral with POE but from what I have found in my research the best advice is to NOT mix oils. Check the oil and filters as this will return any dirty picked up around the system. Chances are that if you have an older R-22 unit installed that it is most likely using mineral oil. Additionally, butane, isobutane, and mineral oil are also included in certain blends. There are components called oil separators that can strip most of the oil from the discharge gas and return the oil to the compressor, these are often used on larger systems and they are still less than 100% effective by themselves. Two units of measure are used with refrigeration oil. First, let’s cover the oil considerations a service tech can easily diagnose and impact. It is always better to move to POE or PVE oils from mineral when retrofitting to an HFC refrigerant but small amounts of mineral oil have proven to be rather inconsequential in most cases.
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