Attach the R134a charge port adaptors, there are two types.. one of which you need to remove the old R12 valve cores. 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. Flushed, vacuumed etc.
difference between r12 and r134a expansion valve Took me a while to figure that one out, and how to say that. . Swapping the components isnt a herculean task, but recharging the AC is a challenge. 2) Frost on the Vents. The condensor airflow drops off as the fan clutch dies slowly. sparkee said: Thanks for the Service Bulletin. The problem with using an approved alternative refrigerants other than R134a is that when the system is serviced it requires certain types of fittings, labels and dedicated equipment. Formula: (R12 Charge Specification x 0.9) - 0.25 lbs. My turn to LOL - greasiesel! With the oil leaking out and being told all sorts of things about how these compressors don't have a sump etc, I wanted to be on the safe side. a 50f delta across the condensor is good, but I suspect that is an idle reading. So if the TXV is OK, and the too much oil situation is not a big problem, then I wonder why the compressor is switching off after about 15 minutes of cooling? R12 and R22 are both now banned by the EPA in the United States. Rich Membership Chairman Using R134a in an R12 system will cause the oil not to move with the refrigerant, causing a system failure and probably won't even cool the system well, if at all. R1234yf. Right now you know you have a bit too much, but with a CR4P compressor this is an insurance policy. The only difference I can imagine would be the recharge connection. The next piece of equipment to track down leaks is a leak sniffer. In short, NO! 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.
difference between r12 and r134a expansion valve 4.3 out of 5 stars 491. The non-flammables can have R22 type gas which is not compatible with most rubber hoses or they have gases that contribute to global warming. ~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446. Bookmarks: Digg; del . R12 Expansion Valve = 201 830 06 84 R134A Expansion Valve = 201 830 04 84 Is there a difference after all? How dumb!I will jumper the aux fan and redo the test. For example, if your system originally had 36 ounces of R12 then you multiply that by .80 and you have 29 ounce of R134a. -------------------------"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest." Edited: Tue July 17, 2007 at 3:25 AM by bohica2xo, I believe there is only one switch - the refrigerant switch. Measure what you have now.3) Go back to the page in step one, and find the largest condensor you can put in your vehicle. Minor adjustments to the expansion valve and other controls may be necessary for some plans. The difference between R12 and R134a TEV (exp valves) is primarily the 'superheat'. Talk about what services you provide. After the system has been tested out it should be checked for leaks.
PDF COMPARISON OF Rl34a AND R12 REFRIGERANTS IN A VAPOUR - AIVC R12 is heavier than R134a and has smaller molecules. On the other hand, R12 has a global warming potential of 10,910. 1) Look Here at the available sizes of PF condensors.2) Go look at your vehicle's condensor & mounting. 3) A TXV optimized for 134a will be ok with R12. However, it was found to be a very bad gas for the environment. The system has been previously converted to R-134a. Your average garage that works on a/c on the side probably would not have this. It will work and there will be very little, in any difference in performance.As Chick stated, the difference is only the gas used in the sensor tube.
difference between r12 and r134a expansion valve This can be very very expensive. The Main change in the system is the expansion valve. -------------------------1983 Mercedes 240D on R12 and WVO!1192 Mercedes 300D 2.5 R134a1993 Toyota Pickup converted to R134a. R134a has a smaller molecule than R12 so R134a will leak out sooner than R12. Paul -------------------------1983 Mercedes 240D on R12 and WVO!1192 Mercedes 300D 2.5 R134a1993 Toyota Pickup converted to R134a. Since the hose is the stock hose, you cannot tell what refrigerant is inside. Do I leave the orignal condensor in, etc?Thanks. It is made up of carbon, hydrogen, and fluorine. Theres no problem with using R134a in a home air conditioning system because it is a hydrofluorocarbon that doesnt cause environmental harm. This is the part that controls the system pressures. Biggest you can fit in there is best. Please enter the name by which you would like to log-in and be known on this site. The typical scenario here is when the car owner buys an inexpensive retro-fit kit from the local auto parts store. Debug the condensor (I am a computer nerd after all!)3. We've updated our forums!Click here to visit the new forum, Year: 1991Make: Jaguar Model: XJ6Engine Size: 4.0. Inhalation of vapor: Inhaling a large amount of R134a vapor can lead to drowsiness, temporary nervous system depression, and lethargy.
Can I use the one for the R-12? After the optimum refrigerant charge is determined the car should be test driven to check for performance of the system. I just got some hi/lo side gauges so I'm going to take readings, if they are needed. Electric fans do wear out. Get to the point where I can walk without crutches2. The old compressor used R12 and the new unit will be R134a. We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. Thanks so much Bohica - you've save me many more hours of fruitless speculation. Below are the major differences between R134a and R12: Chemistry The chemical composition of R12 and R134a differ. #19. It won't be optimal, though.On some/many valves, you can adjust them, but that might make matters worse unless you really know what you're doing (which I don't!).RegardsGeorge. Also, if you want to know what happens if you put R134a in an R12 system, you should first confirm if the R12 system can be replaced or if the refrigerants can be mixed. 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. Ensure you contact a professional mechanic to do the work for you so you dont end up incurring more costs for yourself. The chemical composition of R12 and R134a differ. Also, would a genuine R12 TXV be better, or is it too marginal to worry about?I think I should do the FSM test for performance - they have a graph with ambient temp and a/c temp. 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. From memory, I put in at least 8 ounces of oil, probably around 10 ounces in there. I mean, really a lot. You may need to adjust the valve in a bit to get desired superheat. Is checking the temperature of the in and out of the condensor not the easiest way to tell if it is doing a good job or not? 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.
UNDERSTANDING A/C Everything You Need To Know - Classic Auto Air leading to corrosion of expansion valves, capillary tube plugging, and compressor bearing . The cost of recharging the air conditioner is between $150 to $500.
difference between r12 and r134a expansion valve It slowly gets warmer and warmer in the car, even at highway speeds. VerticalScope Inc. All Rights Reserved. The symbol implies that R12 is a composite of carbon, chlorine, and fluorine. 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 Even though their common major function is to cool the system, they have many differences. If the system was upgraded by a professional it should have an upgrade sticker. R12 is used in several applications like low temperature, medium temperature, and high-temperature applications. R12, on the other hand, is called chlorofluorocarbon (CFC). But as there's not a big difference, people say you can suffice with either. Therefore, the higher the factor of the chemical (compound), the greater its effect on global warming. Super heats are so close, it should not be a major concern.-------------------------The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government. 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. Different correction factors are applied to other refrigerants. A. Pressure/temperature plot of R134a vs. R12 is shown in figure 1. 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-401b is the mixture by weight of 61% R22, 11% R-152a and 28% of R-124. So you could likely put off buying those new hoses just a bit longer if you wanted. You should keep in mind that recharging your air conditioner improperly could result in more serious damage. I'm thinking I might have put too much oil in the system - everywhere i read had a different amount - the manufacturer of the compressor, the MB factory service manual, online forums. Warning: "continue" targeting switch is equivalent to "break".Did you mean to use "continue 2"? They can be mounted quite easy,and there is a mounting kit that helps to hang it. Interestingly, theres one oil type that works perfectly with both types of refrigerants. If your compressor requires replacement or its seals and o-rings need to be replaced due to leakage, it would be wise at this time to either obtain a compressor that has o-rings and seals that are compatible with R134a or have your unit re-manufactured with compatible components. Read on for more information about using automotive r134a in a refrigerator and vice versa. compressor, condenser, evaporator and expansion valve are specifically designed for use with R134a. To prevent refrigerant loss you should consider replacing your old hose lines with barrier type hose. We sometimes use a relay switched from the compressor clutch to run fans. Related products. In cases such as this, the required capacity value of the expansion valve with R134a is reduced by 30% (correction factor 1.42). Since 2010, all home AC systems manufactured use a refrigerant like R134a that has zero ozone depletion potential (ODP). -------------------------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. -------------------------"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest." Your decision could be made based on economics, environmental concerns, or both. If there is no pusher fan, and you have the room, put one in. I'm not sure. Discussion in 'Technical' started by Jsarnold, May 25, 2012. There are two hoses listed, R-12 64-53-1-377-821 for $72.50, and R-134a 64-53-8-391-051 fro $262.50. R134a has a smaller molecule than R12 so R134a will leak out sooner than R12. difference between r12 and r134a expansion valve. The problem with these so called drop in replacements is that to properly handle them you may need dedicated equipment to identify the gas and evacuate it for proper disposal. -------------------------"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest." A discussion of the relationship between valve capacities and superheat set-tings can be found in Bulletin 10-9. maintain the A/C of older cars. All fans must work at 100% of the OEM rating. american sniper longest shot; how to adjust sunsetter awning arms; pastor jeremy roberts texas.
Not osmosis, but you know what I mean). Then, subtract that result by 0.25 pounds to get the proper amount of R134a charge. It's not just the poor performance - the cooling just stops working after a while. R134a Refrigerant Recharge Kit with BPV31 Bullet Piercing Valve and R134a Quick Coupler, R134a/R-12/R-22 Freon Refrigerant Hose Can Tap Kit for A/C System - Easy to use. We consider the the various types alternative refrigerants that are illegal or not approved to be in two sectors: non-flammables and flammables. Its chemical symbol is CCl2F2. system of 0.33 TR and refrigerant used was R12. A/C Expansion Valve Replacement Cost. You will be fine with a 134a-compatible TXV running R12. By after changing just about everything, he got what was termed, satisfactory cooling. Before we mentioned that you can add approximately 5-6 ounces of ester oil to the compressor. Quick View. A vacuum pump, a refrigerant recover system, quality service gauge set with both low and high side gagues, and much more besides the lessons to learn what to do and what not to do. Using R134a requires that Polyolester (POE) lubricant must be used in the compressor. At this time you can still find R12, but, because it is no longer produced, availability is limited to current inventories and the price per pound is greater than R134a. But R22 is almost equally damaging. . 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. You can buy bulk hose, and the proper fittings, then have them crimped off the vehicle.Be sure that no air bypasses the new condensor on the way to the radiator. R134a compressors are substituted as new to retrofit the R12 system compressor part numbers with different height sealing washers. Thus, when the system is running, condensing the CO2 is not a problem. A. Pressure/temperature table for R12, R134a, and R513A is shown in Figure 1. . Very nice! Then again, there are two different expansion valves.
Some say that a chemical reaction can harm the A/C very badly as R134a reacts with mineral oil in some way. An extra half ounce?
A/C R12 to R134a Conversion Success | IH8MUD Forum Compared with the cost-performance ratio, R507 is 30-40% . When you add fluorescent tracer dye to with the refrigerant oil it helps to track down leaks that push oil out of the system. Its chemical symbol is CH2FCF3. R134a has an ozone depletion potential of 0, implying that it has a slight effect on the ozone layer. Miscibility with oil: R12 can be mixed with the compressor oil no matter the operating condition. and feeds it through an expansion valve. Temp switch works the aux fan. Hot coolant migrates up through the core by convection (is that the word? It is made up of carbon, hydrogen, and fluorine. Should I do the test again with the the aux fan jumpered? Its chemical symbol is CCl2F2. -The amount of R-134a needed will typically be 80-90% of the R-12 charge. Since there is only about a 10% difference between R-12 and R-134a, the expansion valve being self-compensating really doesn't make that much difference. If you have 10 ounces of oil in the system, that is contributing to the poor performance as well.
R12 or R134a - 928 Owners Club Forum R134a vs R12 refrigerant? Recovery & flushing is the only way out of an oil overcharge in your vehicle.B. -------------------------"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest." Is there a difference between a R134a expansion valve and an R12 TXV?
R134a vs R12 - What is the Differences? - Rx Mechanic If you're getting a R134a compressor, might as well finish the job - replace the receiver/dryer, flush everything else, and convert to R134a anyhow. might be due to charge or different compressor and age. 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 But I've read that these car's didn't do too well in the a/c stakes, so that might just be as good as it gets. I put one in my old daily driver '79 Chevy tank (r-12), and it really made a difference. They have no moving parts. 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.