difference between r12 and r134a expansion valvenicole alexander bio

It won't be optimal, though. There are three different refrigerants officially sanctioned by the EPA for automotive usage: r-12, r-. It does not "pool" to any degree in a large amount anywhere. Also called the orifice tube. A/C Expansion Valve Replacement Cost. Additionally, R134a was introduced as a replacement for R22 and R12 in high and medium-temperature refrigeration systems like domestic and commercial chillers. The chemical composition of R12 and R134a differ. R-134a is widely believed to be the most acceptable R12 substitute. Whenever its exposed to the environment, it changes to a gas. Its chemical symbol is CCl2F2. Trinary Pressure Switch $ 39.99. Vent temperatures slowly go down to around 50F with hi speed driving. It's best to determine on a case-by-case basis while monitoring system pressures and output air temperature. When the sensor detects the refrigerant leak the sniffers lights glow and the sniffer makes a noise. What is needed? difference between r12 and r134a expansion valve. Inasmuch as R134a has a global warming potential thats over 1000 times more threatening than carbon dioxide, its better than R12. 2) Frost on the Vents. Sense ells no existirem. The oil used in R12 and R134a are different and not compatible. $21 . I'm thinking of jumping the temp switch and leaving the fan on to see how it does. . Participate in over 40 different forums and search/browse from nearly 3 million posts. Just had knee surgery yesterday, so I"M not exactly hopping around too well. Shorting the plug for the refrigerant switch should run the fan when the compressor is on. At 40, it is 35psi, which is a difference of 8.9psi. El juny de 2017, el mateix grup va decidir crear un web deDoctor Who amb el mateix objectiu. Well, I'm not sure it is 'fine' - it doesn't cool very well in 95F weather. By noting the ambient temperature you can look up what the preferred high side pressure should be. The name of the oil is Polyol Ester (POE). . We say generally because the vehicle manufacturer may have a formula already worked out for the R134a conversion process. Further production of R12 was banned in some developed countries by the Montreal Protocol because of its harsh effect on the ozone layer. R12, on the other hand, has an ozone depletion potential of 1, implying that it can damage the ozone layer. You should keep in mind that recharging your air conditioner improperly could result in more serious damage. These efforts to balance the system can not be realized if there are problems within the a/c system, such as: poor performing compressor, dirty condenser or poor air flow through the condenser, malfunctioning expansion valve, water or air in the system, improperly operating fresh air or heat input in the climate-air mixing system. So I probably put the highest suggested amount in to be safe. R134a refrigerant is about 10% less efficient in moving heat than R12! By: james smith underoath; Comments: 0 . And no, you cannot "drain' excess oil out. This allows the refrigerant in the condenser to be void of oil particles. You'll want the expansion valve matched to whatever refrigerant you're using. To ensure the right charge, you must fill the new system with between 75 and 85% of the factory-set capacity for optimal cooling. Production of R12 ceased in 1996, although it can still be reclaimed, purified, and resold, and small cans of New Old Stock R12 are still widely available on eBay and Craigslist. We sometimes use a relay switched from the compressor clutch to run fans. R134a was selected as a replacement refrigerant for R12 because R12 contains chlorine and has a major effect to ozone layer depletion. Is there a graph? All pre-97 XJs use systems with the same basic operating principle, although the parts do change a bit. They examined the two configurations of capillary tubes i.e. Can I just use an adapter and save $200? For R12, its mineral oil. This refers to BTU's (heat) moved per pound of refrigerant moved. How about evacing 1 pound of refrig from the system, and then putting 1 lb of pure R12 back in? So, instead of using R12, other better options include R401b, R134a, R401a, etc. It's actually a reaction with chlorine in the mineral oil that may have been absorbed and leftover from the old R-12. I am ordering new parts, and planning to convert my system to R-134a. GWP is a measurement of Greenhouse Gases and their effect on Global Warming. 05-25-2017 02:14 AM. Some 1993 and older R12 systems aren't as 'compatible' as you'd think to switch over. The Wikipedia explanation for expansions valves cited in Frank's thread says that the gas inside the bulb in the metering valve is the same as the refrigerant in the system. From memory, I put in at least 8 ounces of oil, probably around 10 ounces in there. Comparatively, larger R134a molecules should take more space, and a smaller amount might be required. Should I do the test again with the the aux fan jumpered? With tube & fin condensors in MVAC applications there is never "too much" airflow. R134a has a smaller molecule than R12 so R134a will leak out sooner than R12. look at the difference! However, take note that R134a refrigerants are manufactured specifically for automotive air conditioners. Is there a difference in the expansion valve for R12 as opposed to R-134a? You do not however need to replace all the o-rings or seals for a simple conversion, it is simply a logical thing to do when and if the time comes to work or replace certain components because of age issues. Its chemical symbol is CCl2F2. might be due to charge or different compressor and age. Automotive Replacement Expansion Valves & Parts; Industrial & Scientific; Customer Reviews. But, if your car lacks enough condenser and you have many 100+ degree days then you may want to stick either increase air flow, add another condenser as we mentioned in The Mr. Ice Project or stick with R12. If your a/c system is empty/low on refrigerant, if your system has a leak or if you need to open the system, then now is the time to decide which refrigerant you want to use. The mechanical fan & clutch should be checked as well. A capacity curve is shown in figure 2 for relative capacity of R134a vs. R12 for evaporating temperatures from 0F to 50F. difference between r12 and r134a expansion valve. Is there a difference between a R134a expansion valve and an R12 TXV? Therefore, the higher the factor of the chemical (compound), the greater its effect on global warming. In short, NO! Condensers designed to release greater amounts of heat help to expel the greater amount of heat which R134a removes from the cars interior. George Bray on Wed August 31, 2005 5:03 PM I believe the optimum supercool setting will vary slightly between an expansion valve for an R12, as compared to R134a, system. The ARPA Zone/Open Membership Discussion Forums. The experimental values of C.O.P.H obtained with the R134a/ester charge were 20.2% R12, on the other hand, is called chlorofluorocarbon (CFC). Thanks for the input. Most vehicles manufactured before 1993 have the R12 A/C system. Its cylinders are colored white. Also, R134a cylinders are light-blue in color. The only mechanical differences between an R12 system and an R134a system are that R134a systems typically have larger condensers and more powerful compressors. Inhalation of vapor: Inhaling a large amount of R134a vapor can lead to drowsiness, temporary nervous system depression, and lethargy. The Wikipedia explanation for expansions valves cited in Frank's thread says that the gas inside the bulb in the metering valve is the same as the refrigerant in the system. Please enter the name by which you would like to log-in and be known on this site. Use a strong surfactant like Simple Green or Zep Citrus, and soak the fins on the condensor. That is a good thing. It's not just the poor performance - the cooling just stops working after a while. Big . But, if your old compressor has lock-up or if your current expansion valve is not functional it would wise to replace the expansion valve with a valve designed for R134a. A/C systems designed to use R-12 will cool best when charged with R-12 refrigerant. "Howdy, Folks!" El maig de 2016, un grup damics van crear un lloc web deOne Piece amb lobjectiu doferir la srie doblada en catal de forma gratuta i crear una comunitat que inclogus informaci, notcies i ms. A slow loss of cooling at city speeds is usually related to condensor capacity & airflow issues. Moreso, it had been banned. The system has been previously converted to R-134a. Instead of using R12, its preferable to use R134a because it is very easy to find in the market, its sold at an affordable price, and is environmentally friendly. Catalog E-1, Thermostatic & Automatic Expansion Valves / Page 1 Table of Contents . For example, at an evap temp of 30 (your daughter's system is probably running around 25-28 saturated in order to give a 32 duct temp), the pressure of R-134a is 26.1psi. Superheat you can consider to be the additional amount of heat. Rules governing changing from the former to the latter differ between countries. R12 was once used in many air conditioning units as a refrigerant or cooling agent. One thing at a time here, and slowly, the knee is not up to jumping around like I used to at the moment. The most common influences which effect the capability of R134a to perform well are the condenser, in some cases the the superheat setting of the expansion valve or the amount of R134a. What is a good differential? A discussion of the relationship between valve capacities and superheat set-tings can be found in Bulletin 10-9. I'm also thinking maybe I should go to R134 - it might work better with the right amount of oil and the correct expansion valve. These cheap kits usually have a few cans of R134a (either 12 ounce or 16 ounce), maybe an extra can of refrigerant oil, a few generic R134a charge port adapters and maybe some o-rings. They should be able to keep you comfortable on a long trip, but don't expect vent frost in 3 minutes or lesss.2) Too much oil can reduce cooling capacity, and the effect is not linear. compressor, condenser, evaporator and expansion valve are specifically designed for use with R134a. What is usually sniffed are all the connections in the system: hoses and compressor, condenser, drier, expansion valve and evaporator fittings. That's a lot isn't it? (You must log in or sign up to reply here. The next piece of equipment to track down leaks is a leak sniffer. For instance at 25 F the pressure of R-12 is 24.6 PSI and the pressure of R-134a is 22.1 PSI. R134a and R12 are among the most popular types of refrigerants. Energy usage: R134a is less efficient in cooling compared to R12. Boiling Point: R134a refrigerants boiling point is -26.3C (-15.34F). . R134a vs R12 refrigerant? R134a compressors are substituted as new to retrofit the R12 system compressor part numbers with different height sealing washers. Autor de l'entrada Per ; Data de l'entrada calexico west port of entry hours; 12 month libor rate 2021 a difference between r12 and r134a expansion valve a difference between r12 and r134a expansion valve You can also check the Aux fan in your case. We are an automotive mechanic blog that helps mechanics and car users to find the most recent and accurate technical and repair information for their cars. Ask Our Pros-Owner Assistance - NO DIY advice will be given. In more serious, it could result in cardiac irregularities or death. 5. Carefully study the chart and compare the following: To a large extent, the choice is up to you. The sticker typically has a place to note the amount of refrigerant used, the type of oil and amount of oil, the technicians sign off or name and the date of the conversion. This implies that the discharge pressure of the compressor should be moderate so it can produce the refrigerants condensation in the condenser at the atmospheric temperature. R-12 expansion valves can be re-used, but will not be as efficient as R-134a specific ones because of the slightly different pressure specs of R-12 vs. R-134a. R1234yf is more environmentally friendly and has a global warming potential of 4. The crossover point is approximately at 64F. Existing technology: R134a has been in use in the refrigeration industry for very many years, and theres so much information about the safe use of the product. Above this temperature, the saturation pressure of R134a is higher than that of R12; below, it is lower. Not osmosis, but you know what I mean). The cure is to use the newer R134a compressors is sealing washers that are different thickness. Though - the valve for a 1991 says R12 on it, and for a 1994, it says R-134a. The condenser water inlet temperature and flow rate are controlled with the use of a . Thus, when the system is running, condensing the CO2 is not a problem. But R22 is almost equally damaging. Usually, mechanics charge around $200 for conversion. Reattach the hose lines using new R134a compatible o-rings, lightly lubricate with compressor oil. About four or five years ago, I guy with an MB came here with the same problem, that tread was over six pages long. Before we mentioned that you can add approximately 5-6 ounces of ester oil to the compressor. Break out the new gauges and measure hi and lo at 1500rpm, and do the Merc FSM test to see how we're doing performance wise. I've done the FSM test and with 81F ambient, the vent should be 50F. Your average garage that works on a/c on the side probably would not have this. If there is a resource I should read first to save you time, let me know. And yes - expansion valves sometimes need replacing if they are sticky - but a proper AC flush should eliminate the need for a new one if it's already in good condition. link to How to cut off a Catalytic Converter. In practice this means that the car can overheat and the aux fan will stay off! You may need to adjust the valve in a bit to get desired superheat. Is the information not applicable to the old Pantera system? Figure 2 shows the different phases and pressures the refrigerant . If the charge is low the compressor will cycle on/off in the max AC position. R-134A has a slightly lower pressure at evaporator temperatures (30-40 degrees), but R-134a also has a much higher pressure at condenser temperatures (120-150 degrees). is good, then I should be looking elsewhere? american sniper longest shot; how to adjust sunsetter awning arms; pastor jeremy roberts texas. The original rubber a/c hose lines in your car will leak out R12 through the hoses lining. Generally this works well for the whole system. System has been working fine for a year. The newer valves and switches will work with both refrigerants. R12 was once used in many air conditioning units as a refrigerant or cooling agent. Use strips of foam to couple the two heat exchangers if necessary.B. A Lot of the fins are bent, especially at the top. Hopefully after you have read this entire page you will have enough information to determine which type of refrigerant is best for you. R-134a can actually cool better than R-12 in a well designed R-134a system as it has better thermoconductive properties, but all the high pressure issues have to be addressed.But even when these cars were brand new, didn't cool worth a damned, recall almost dying in one in Las Vegas at the time, but a good way to lose weight with gallons of perspiration pouring out, just don't let that drip on the seats, that is inappropriate. So to keep things simple and to avoid controversy and politics we have R134a. "Jerky Locker" LMAO I am using that one in the future!Florida = BUGS! If it splashes inside the eye, it could lead to a serious eye problem. Do I leave the orignal condensor in, etc?Thanks. by | Jun 21, 2022 | what is the most accurate latin translator | burlington iowa arrests | Jun 21, 2022 | what is the most accurate latin translator | burlington iowa arrests Very nice! The whole trick is to sit there in those steam boxes and not perspire, it's vulgar to perspire when driving on public roads.If you want esteem, drive an MB, if you want comfort with 60*F interiors in a 125*F environment, get a Caddy. I have the original (R12) style expansion valve in the Maverick AC system. 1) Warm Air From Vents. A York oil capacity is listed as "6.5 to 9.6 ounces". I don't know where it is getting the switch off command, or why the vent temp drops steadily. Talk about what services you provide. We suggest dumping the old refrigerant oil in a clean container and inspect the oil for sludge or waxing (old oil that has gelled) and contamination (metal particles). According to Wikipedia, There is such a thing as "r132a" (1,1-Dichloro-2,2-Difluoroethane), however there is no indication of it being a commercially produced refrigerant. It didn't seem too dirty though - I don't think it is the problem, but I could be wrong. Different correction factors are applied to other refrigerants. The old compressor used R12 and the new unit will be R134a. R134a is otherwise called 1,1,1,2 Tetrafluoroethane, Florasol 134a, Freon 134a, Norflurane (INN) or HFC 134a. Anyone know what happens when an R12 expansion valve is used in a system charged with R134A? 2001-2023 Griffiths Technical Inc. All Rights Reserved. As per their results . The problem with not being an expert is that you don't know what is important and what's not. With R134a you do not rely on the site glass. To prevent refrigerant loss you should consider replacing your old hose lines with barrier type hose. So the steps involved are cleaning out the old oil, replacing all the O-rings, replacing the dryer, replacing the expansion valve, and converting the high and low side connectors from Schrader to quick connect valves. There is only a temperature switch on these cars as far as I recall, and it just switches on the aux fan. A good T/C, clamped to the line & insulated gives a repeatable measurement of the tube. R 134A is designed for the high demands of an automobile AC and cannot be used on refrigerators due to pressure differences. R12, on the other hand, is called chlorofluorocarbon (CFC). That is for the compressor, drier, expansion valve and condenser. Thanks again. of coiled cap tube on VCR system with R134a. Pray I can let some oil out of the compressor without losing my precious R12. The cost of recharging the air conditioner is between $150 to $500. After the initial charge the system is then tweeked : you determine the optimum amount of refrigerant to match your system by monitoring the a/c outlet vent temperature and the high side pressure as you add or remove refrigerant. Discussion in 'Technical' started by Jsarnold, May 25, 2012. 3 ounces? Before landing on the debate of R134 vs R12 you should know that both R134a and R12 are AC refrigerants types used in refrigeration and air conditioning systems. Thus, when the system is running, condensing the CO2 is not a problem. That way I will have reduced the oil by about 1/3 (assuming the oil is mixed evenly through the system). This can be very very expensive. The cure is to use the newer R134a compressors is sealing washers that are different thickness. Make sure to get the R12 EXP valve if that is the way you go. Anyone know what happens when an R12 expansion valve is used in a system charged with R134A? R12 is used in several applications like low temperature, medium temperature, and high-temperature applications. It is a known suspect that lets heat into the heat exchanger/core even when off because the mono-valve is on the exit side of the heater core. By after changing just about everything, he got what was termed, satisfactory cooling. So that indicates it is cooling well there doesn't it? -------------------------Just another brick in the wallHad a little mule I fed him castor oil and every time he jumped the fence he fertilized the soil, The older expansion valves were filled with the refrigerant they were used with, the replacement valves (today) are filled with a different chemical to work with both refrigerants..Hope this helps-------------------------ChickEmail: Chick---------------------------------------------Freedoms just another word for nothing left to lose, I believe the optimum supercool setting will vary slightly between an expansion valve for an R12, as compared to R134a, system. You do not have to split up the 5-6 oz of oil and add it to each component, just simply put it all in the compressor as it will move throughout the whole system once the system is operational. I don't recall all the details, but starts off with the largest parallel flow condenser and improved fans. Yes, this was a smokers car. #13. R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. I would suggest you do stay away from R-134a since with the hot gas bypass of your system (if it is to be just as the original) extremes of temperature and pressure will be very hard on your compressor and the rest of the system. However, R134a is better than R12. Since then, the industry standard has been R134a, which is an efficient replacement. gital control scheme. The OEM spec is 2300 rpm @ 12.6v (engine stopped fully charged battery). The primary function of the design engineer is to make things difficult for the fabricator and impossible for the serviceman. Consider using the newer valve, even with 134a stamped on the valve. Then, subtract that result by 0.25 pounds to get the proper amount of R134a charge. Plus, not releasing the chemical into the air is morally justifiable. The expansion valve is designed so that the temperature of the refrigerant at the evaporator outlet must have 8 to 12F (4 to 7C) of superheat before more refrigerant is allowed to enter the evaporator. Kommentare . He started writing automotive articles to share his garage experience with car enthusiasts and armature mechanics. Given two identical vehicles, each with the same weighted amount of refrigerant, the vehicle with the R134a has the capability to remove more heat (measured in btus) from the vehicle than the same type of vehicle using the same amount of R12. . That would be the "black death" syndrome. Bookmarks: Digg; del . This is the part that controls the system pressures. Even though their common major function is to cool the system, they have many differences. The bad thing is I don't know what to do about it. We mention using ester type refrigerant oil. I had a pair on my SAAB that seemed ok - but new ones ran 20% faster!Your best clue to airflow issues is a 60 mph test. Do a pre-inspection and then Evacuate (vacuum down) the system, the longer the evacuation the better but there is a point of diminishing return, 2-3 hours is generally very good. I have one can left, so maybe a plan can be made. Compressor. If you find any of these conditions you will want to liquid flush (with dedicated AC flush solution) all the lines, condensers, evaporator (remove the expansion valve) before you proceed further. Hot coolant migrates up through the core by convection (is that the word? Nevertheless, if your application is configured only for R12, then you can use it or consider replacing the applications engine. Answer: OK, I'll bite. Skin contact: If the R134a (liquid) comes in contact with your skin, it could cause a burn. 5) A/C System Failure. This kit comes complete with Expansion valve, o-ring kit, and 1ft. . Are r12 and r134 fittings different? Your decision could be made based on economics, environmental concerns, or both. _____ 2012 E350 2006 Callaway SC560 . This is because R134a. R12 and R22 are both now banned by the EPA in the United States. When the ambient air temps get above 80F the gauge readings can run a bit higher on the high side and lower on the low side when using R134a. 30 deg is pretty coldSystems generally run between 40 and 43 deg. R-401b is the mixture by weight of 61% R22, 11% R-152a and 28% of R-124. Even if the system leaks, repairing the leaks and recharging it with R-12 is usually the best repair alternative. Jun 17, 2011. Above this temperature, the saturation pressure of R134a is higher than that of R12; below, it is lower. leading to corrosion of expansion valves, capillary tube plugging, and compressor bearing . You can spend long evenings reading about the differences between the two refrigerants. The system will be checked for gross leaks while under vacuum. If not, you just don't know unless a test is performed. They would then make short "jumper hoses" to connect to the existing stock hoses, refit your old fan if there is a "pusher" fan, and recharge to specs. This is 11F off the FSM performance graph - vent should be around 50F. I'm putting r12 back in my system, but all of the valves I can for the application (1990 jeep grand wagoneer) say r134a on them. First, differences in physical properties: 1, insoluble R12 compressor oil is used (to reduce the lubricant) 2, dissolved sealing materials are used (resulting in refrigerant leakage) 3, easy to damp (so easy to internal . Compatible with multiple applications: The major reason for the introduction of R134a was to replace R12, so it functions perfectly in the same range of applications like rotary, screw, and centrifugal compressors for air conditioning and refrigeration. I remember I had the wrong seals and it leaked some oil, so I put some more in.Bohica - I tested the pressures. I'm not sure. Therefore, the R12 refrigerant is illegal, and emitting it is illegal. This refers to BTU's (heat) moved per pound of refrigerant moved. The reason is that the vehicles, for instance, manufactured currently configure the engine for R1234yf refrigerant, making no provision for replacement. It was later found that R-134a had a very high Global Warming Potential, or GWP, number. I mean, really a lot. There is more to check.The evaporator must be clean as well as the condensor - was this a smoker's car?You should check the water control valve for the heater core. R134a refrigerant is lighter than R12. The safe high side pressures are determined with a PT (pressures and temperatures) chart. . We've updated our forums!Click here to visit the new forum, Year: 1991Make: Jaguar Model: XJ6Engine Size: 4.0. The pressure at low temperatures is nearly the same between 12 and 134a. I've got a ball valve I'm going to put in the coolant line before the coolant goes through the firewall to the core. R134a has the chemical formula CF3CH2F and is known as tetrafluoroethane. I recommend replacing the expansion valve when you do the swap. So if you car has a large amount of rubber hose, such as a 40 feet with the 911, then you will be re-charging the system often and that is expensive no matter which refrigerant you use. Trinary Pressure Switch quantity. Paul:It is never a waste of my time to chat with someone that understands the problem, and wants to fix it. If your cars system has a sufficient condenser design and air flow to expel the greater amount of heat extracted by R134a, then by all means you should convert over when the time comes. Yep, definately not a meat locker. B. This is a great space to write long text about your company and your services. Add to cart. Then again, there are two different expansion valves. R-134a XV for R-134a use. Paul -------------------------1983 Mercedes 240D on R12 and WVO!1192 Mercedes 300D 2.5 R134a1993 Toyota Pickup converted to R134a. It runs between the condenser outlet, receiver/drier unit and expansion valve at the firewall. If you have a perfectly operating system using R12 you do not have to drop what you are doing and convert to R134a. In the automotive world, the replacement for R12 was R134a. However, if it is taken close to a fire flame or any electrical heating element, it disintegrates into toxic products. Bottom line, R134a simply doesn't cool as well as R12. I think so. Can I use the one for the R-12? Also, since R134a uses synthetic oil, it has a low global warming potential, unlike R12 which uses mineral oil which poses a negative environmental impact. But with an R4, better too much than too little.3) A TXV optimized for 134a will be ok with R12.4) The airflow across the condensor is crucial to good performance. Osuagwu Solomon is a certified mechanic with over a decade of experience in the mechanic garage, and he has over five years of experience in the writing industry. This would become an expensive investment for a repair or service station to have unique dedicated equipment for every type of alternative refrigerant. Als nostres webs oferimOne Piece,Doctor Who,Torchwood, El Detectiu ConaniSlam Dunkdoblats en catal. When I compare parts, 93 uses one part number and 94 has a different part number. I put in a new (not reman) compressor (R4 I believe it is) in my merc 240D, new drier, new expansion valve, new o-rings, nylog. MB has specfic test parameters for performance, but you can always test at max load - doors open fan on highest speed.The oil overcharge looks like a parabolic curve. 3) A/C Compressor Always On. Failure to abide by the EPA regulations can result in expensive fines for either you or your service technician. Performance doesn't seem to have improved. Rules governing changing from the former to the latter differ between countries. difference between r12 and r134a expansion valve why is miles raney not on homestead rescue June 21, 2022. manila mayor candidates 2022 Look at where the lines will end up. |. With the A/c off hi and lo were both at 105psi. You will be fine with a 134a-compatible TXV running R12. Though you can purchase 12 or 16 ounce cans of R134a from local retailers it is very difficult to measure out the correct amount into your system. 4 Stars & Up & Up; 3 Stars & Up & Up; 2 Stars & Up . If ambient is 90 (today) and the output of the condensor is 110, that's pretty good isn't it? Could that be screwing up the systems performance?Anyway, when I installed the system, the new TXV (is that short for expansion valve?) R-12 is no longer used or produced in many countries and remaining quantities have skyrocketed in price. A thermostatic expansion valve (TXV) (see Figure 1) is a refrigeration and air conditioning throttling device that controls the amount of refrigerant liquid injected into a system's evaporatorbased on the evaporator outlet temperature and pressurecalled the superheat.

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