R12 To R134a Pressure Conversion Chart



When converting a 1989 chevy K1500 from R12 to R134 what is the refrigennt capacity, what should the charge pressure be when filling and lo and high pressure when running. Law # 4 - R134A - use 70-80% less by weight than R12. Try to get a kit that includes a pressure gauge, which will make troubleshooting and charging easier. As you'll see R-134a cools just as well as R12 if not better in some instances. R12 and R134a are the most common types of refrigerant gases uses in vehicle air conditioning systems. Larger DIA nipple Fitting. Pollen filter: please contact with details. YELLOW Hose goes to the Vacuum pump, the Freon can, Charging Cylinder ETC. no --it cannot. Can an R12 A/C gauge be used for an R134a system? Hi, first off, my dad has an R12 A/C gauge he used back when he was a mechanic, many years ago. Of course, that was from a dealer, so take the price with a grain of salt, but BMW service bulletin B 64 05 96 states that the OEM E30 M3 A/C compressor is NOT/NOT compatible with R-134a and must be replaced with part number 64 52 8 363 550. --- If a component is replaced prior to retrofitting the system to R-134a, an appropriate amount of PAG refrigerant oil must be added to the circuit. But it is hard to find and expensive. 4 pounds (38. With this temperature, corresponding saturation pressures of the two refrigerants are above atmospheric pressure so as to prevent ingress of air into the refrigeration system. Even if you have an r12 system with no leaks, flush the system properly, then recharce with r134a and the proper oil but it still has the older style hosesthe r134a will leak out. The question on this topic was can I use a 410A condensing unit with his R-22 air handler. R-134a Refrigerant A/C System Starting with the 1993 NSX and Legends, Acura will begin equipping cars with R-134a refrigerant A/C systems. For a best buy on the Robinair 45111 A/C R-134A manifold gauge set with 72" hose and couplers p/n ROB-45111. We are working on allowing guests to post, sorry for the trouble. a01 | eco32 (i). The conversion requires replacing the compressor with an R134a replacement compressor with an oil charge that is tolerant of residual R12. Further, it may be necessary to replace the pressure relief valve (mounted on the high-pressure fitting at the A/C compressor) if it has. By the way, the conversion ratio from R12 to R134a is 0. I've read elsewhere that R134 should typically be about 75% of R12, but I have no idea how accurate that information is. R134a/R1234yf Airconditioning Filling Chart > (PC & LCV only! For Trucks see total list on www. I had the AC on my 84 converted professionally. Don't rush into tossing it. It includes a new Mustang compressor, lines, condenser, all hardware and instructions to upgrade, as well as a stock length serpentine belt. R-12 (Freon) to a more environmentally safe formula, R-134A. It'll be nice to have a cool cab once again. Added Notes • Use R12 conversion for R416A • Use R134 conversion for R401A, R401B, R406A, R500, R409A • Use R502 conversion for R402B, R403B, R404A, R407C,R408A. The system will have either an orifice tube or an expansion valve. Just wondering if it caused any problems? Since the Freeze 12 requires 10 to 15% less than the R12, does it mean you would see bubbles in the sight glass (collector) in the front of the car even when it is full?. Competitive prices for durango halogen models headlamp. R134a Pressure Temperature Chart 14 4. Another difference is the lubrication uses, where R12 uses a mineral oil and R134A uses a PAG oil. The refrigerant R-12 used in car air conditioners contains CFCs. With the old R12 refrigerant this pressure should be about 28 psi, any lower and the evaporator gets too cold and freezes up, stopping air flow through it. R134A to R1234YF 6 pc. Coupler conversion kits and replacement couplers are vital repair parts. 1300 in comparison with R12 [3]. Change the rubber hoses to R134a approved type, which now is about all that is available new. I had the AC on my 84 converted professionally. The conversion is determined by multiplying the R12 charge value by. We are working on allowing guests to post, sorry for the trouble. But now that the new cars, come with R134a, can his gauge he has, still be used to vacuum AND recharge a R134a system? Secondly, the R134a port on the vehicle is much different in size and fitting. SD 5H09 5 R134a 5. Hydraulic Thread Chart. Locate Vacuum Gauge available to buy right now on the internet!. Looking at the conversion kits our host has to offer (I find them confusing), because if I purchase a kit of sorts, then I would expect it to include all the items necessary for the upgrade. Also check for proper clearance between the hood and the R-134a adaptor/switch. For this reason they must be replaced by more environment-friendly refrigerants, as the new family, designated as HFCs, that are chlorine free. The factory method is the best choice because you'll replace parts that are probably leaking due to age. I've used it with good results twice on other cars. HVAC R12 R22 2004 Frigidaire MANUAL Defrost Upright freezer. R22 refrigerant phase-out schedule; photographs of R12 and R22 dispenser canisters & charging gauges Alternatives to R22 refrigerant - R refrigerants: R-410A (GENETRON AZ-20, SUVA 410A, and Puron), R-134A R-407C. 12 Page 1 of 9 SAFETY DATA SHEET REFRIGERANT R134A SECTION 1: IDENTIFICATION OF THE SUBSTANCE / PREPARATION AND OF THE COMPANY / UNDERTAKING. You will also need them to fill the system with R134A. Online shopping from a great selection at Automotive Store. Can (18 oz. You can get an R12 to R134a conversion kit at an auto parts store, but it’s best to have it done professionally. Coupler conversion kits and replacement couplers are vital repair parts. it says "3 3/4" pounds and internet calculators convert that to be 60 ounces:. at an authorized service shop, but you can find black market R12 online for somewhat cheaper - it comes in from India or somewhere. Contains a complete assortment of hardware necessary to convert R-12 A/C systems to R-134a. 2, displays all the pertinent properties for a given. This is a direct drop in replacement for R12 freon I have used it in a few cars that still have not been converted to 134a and have had good luck, and also have used it in place of 134a because it has lower operating pressure and its 12-13 degrees colder than 134a, here's their web site www. R-22 is a high pressure refrigerant and R-134a low pressure refrigerant. For a best buy on the Robinair 45111 A/C R-134A manifold gauge set with 72" hose and couplers p/n ROB-45111. After more research, I came to the conclusion that only solution to my non functioning A/C was to convert the system to the newer R134a (HFC-134a) gas. this information has been fully checked for accuracy but is a guide only - contact realcold staff for more information temp oc r12 r134a sp34e r409a r22 r410a r419a r407c r502 r404a r408a r507. Car air conditioner retrofit with HFC-R134a From $350. R12 VS R134A A/C Systems - Differences in parts? I did a 134a conversion, but wondering I can also exchange for a 1994+ compressor designed for 134a at no cost difference. For full details, read the EPA Tips for R-134a Conversions. pdf R134a TEMPERATURE PRESSURE. Most of the problems you hear about R134A, is because they didn't draw the system down to negative pressure. With the phase-out of R12 (1st January 1996) many compromises have to retrofit to R134a. Converting Air Conditioning to R-134 By Rob - [email protected] Find durango halogen models headlamp in stock today on the internet. When mixed, they form an acidic goo that can ruin pretty much all of the a/c system. I had the AC on my 84 converted professionally. This is because the pressure temperature relationship of R-12 and R-134a is different. The head pressure are much higher on a R134a system than R12. The cheapy conversion kits usually end in catastrophe anda $1,000+ bill. North American, British Pipe, and Metric threads are listed where used with the corresponding coupling end style and size. my gauges have an outter dial for R134 that reads in degrees what should that reading be. 134A uses a different oil, "ester" than R12, The system will cool, the main difference is the ORifice or expansion valve which controls presssure, Now difference in oils less oil will be circulated throughout the system when just adsding r134A, this will cause your compressor to fail prematurely, some compressors will probably work for a year. • 60" R134a hose ROB-48134B R12/R134a Brass Manifold Kit • 90° manual couplers • 60" R134a & R12 hose set MTC-99872A R134a Automatic Digital Manifold Gauge Set • Displays temperature, pressure and vacuum readings for R134a • Refrigerant and oil capacity readings for 55 automobile manufacturers. Many people say you HAVE to replace the evaporator, and you MUST change the o-rings, but I can't find anyone saying anything about their R134a conversion after they have done it (minus this thread). Diagnostics on this generation of Caddy have never been fun. Do I have to change the compressor oil and replace o-rings , drier , txv valve ,etc. The more environmentally friendly R134a has been used in most models since then. This refrigerant can therefore be used as an alternative for most former R12 applications. Also, it seems that systems using the R134a refrigerant must utilize higher pressures to achieve the same level of cooling that was attained by the R12. A parallel flow condenser is required for R-134a because it can dissipate more heat from the higher operating pressure of R-134a due to a more efficient design, ie: more surface area. R134a Like GWP Level 400-675 < 1500 ~600 ~300 R32 HFO 1234yf HFO 1234ze R410A R22 R407A R407C R407F, R452A = XP44 0 500 1,000 1,500 2,000 Pressure or R32/HFC/HFO Blends R32/HFO Blends HFC/HFO Blends R134a CO 2 R404A R507A DR2, N12, ARC 1 R290 NH 3 A1 –Non Flammable A2L –Mildly Flammable A3 –Flammable B2L –Toxic, Mildly Flam. Change the rubber hoses to R134a approved type, which now is about all that is available new. The oil acts as a means of transportation for the refrigerant. R134a is so much smaller than r12 that it will leak right through the older hoses used for r12. Your pressure should be close to 17-20 psi at the point of shut off. 1,1,1,2-Tetrafluoroethane is a non-flammable gas used primarily as a "high-temperature" refrigerant for domestic refrigeration and automobile air conditioners. Because of the lower pressure drop, pilot operated solenoid valves and pressure regulators may not operate. 51 Nice R134a Pressure Temp Chart – Welcome to be able to my own blog, in this particular time period I’ll explain to you concerning r134a pressure temp chart. 4 degrees F while R-134a is only -15 degrees F. R134a A/C Refrigerant Retrofit Guide Software A Quick Reference Guide to Converting Older R12 A/C Systems to R134a Refrigerant. IE does it use a orifice tube or expansion valve? how is the compressor controlled? pressure switch or temperature sensors? If pressure switch, is the stock one adjustable? is an aftermarket adjustable (or r134a specific) one available? Like others have said the more you do, the better chance you will have of a successful conversion. The net weight is 6oz, but it fills your AC like 16oz of R134a! (See Conversion Chart). When using R134a refrigerant, the same temperature is achieved at about 24 psi. 6 lbs/ft 3: Liquid Density at 80°F. When converting a 1989 chevy K1500 from R12 to R134 what is the refrigennt capacity, what should the charge pressure be when filling and lo and high pressure when running. Also, explore tools to convert bar or psi to other pressure units or learn more about pressure conversions. used up to atmospheric pressure, or zero pounds of gauge pressure. I have a set of manifold gauges for R12, and have the R134A adapters that go on the hose end, so I use the same manifold set for both vehicles and both refrigerants. refrigerant pressure temperature chart pdf Weights of Refrigerant in CU lines - lbs100 Lineal Feet. Buy a 1986 Porsche 944 R12 Refrigerant Oil at discount prices. nz Temp ˚C Pressure kPa Temp ˚C R134A R406A R22 R407C R410A R404A R507A MO49 R437A MO59 R417A MO79 R422A MO99 R438A. Look up he P-T chart for the evaporator temp and charge the system to that pressure. 60% of the Vehicle Mfg’s Original recommended R12 Refrigerant weight. The blended refrigerant R-134a is a long-term, it is an HFC alternative with similar properties to R-12. Should be R12 unless it has been converted to R134a, in which case R134a compatible fittings were added over the high and low pressure ports, and they don't fit R12 hose connections. You will need a certified a/c repair shop to evacuate and flush the system before the conversion. That's why many people simply recharge their older R-12 air conditioning system with R-134a after repairs have been made. Also, r12 is a more effective heat transport than r134a, so an r134a compressor has to create more pressure to do the same job. I have an older vehicle that has AC, but it needs a recharge. Mine is still sitting in the box because I have bigger fish to fry at this time. As soon as my manifold set arrives, I'll give adding some of the freon a try. this explanation came from an earlier post I made. Since it's virtually impossible to tell exactly how much oil (or refrigerant for that matter) is in a system, your best bet is to flush everything, then start from scratch. 2, displays all the pertinent properties for a given. I want to upgrade to a R134A refrigerant. There are two ways to convert your car’s old R12 system to R134a: The factory method and the easy method. Environmental Protection Agency, states that R134A is not flammable at ambient temperatures and not corrosive to metals such as aluminum. You should always attempt to verify the information with your vehicle manual or information provided on the underhood stick, sometimes also located on the top of the accumulator. Hg) vacuum from. (F) Pressure (psig) Temp. Converting to 134a - GM Cars Until 1995, most cars with air conditioning used R-12 Freon refrigerant that is said to have a negative side effect of damaging the ozone layer and is no longer produced in most countries. In some applications the HPRV is located on the filter/drier. Check your owner’s manual or the stickers under your hood if you’re not sure which refrigerant you should use. Jaguar Air Conditioning Conversion from Freon to R134A. After the second can was emptied, the system then had sufficient pressure to run on its own and the switch was reconnected. The bottom line is that as far as I can tell, it is not necessary to go for a complete system rebuild (as with R134a) to convert from R12. You will need an additional can of R-134a to make 40 ounces. But now that the new cars, come with R134a, can his gauge he has, still be used to vacuum AND recharge a R134a system? Secondly, the R134a port on the vehicle is much different in size and fitting. com (Editor's note: Please read this article on Refrigerant Recovery. Most newer 134a systems use PAG oil. Recheck & Test the systems operation observing the Discharge Pressure & Radiator/Condenser fan operations. R12 or R134a are your best choices when it comes to your car. pressure chart of r404 & r22 vs. The R134a converted A/C system in Lil Red has been doing well with the R12 Low Side pressure cycling switch for more than 3 years now. Rather than trying to find some R12 and topping-out, I would like to convert to a R134a Retrofit. The pressure-enthalpy chart, as shown in Fig. Refrigerant R-22 Pressure Temperature chart. It however has zero compatibility with mineral oil. Any blend of R-12, R-22, or R-134a increases the system pressure and diminishes cooling. This calculator converts from volume to weight (mass) according to the chosen substance. 0 (July 2001) This page will hopefully guide you through a conversion to R134A. REFRIGERANT PRESSURE/TEMPERATURE CHART The RPT Chart Master is a compact digital pressure temperature chart. Our solution is to offer a true ‘drop in’ replacement to R12 known as RS24. Hello Everybody, I am Looking For formulas to convert Temperature to Pressure and opposite for Refrigerants R22,R12,R717,R134a etc. 06°C) Saturation Properties - Pressure Table (60 kPa - 3 MPa). Boiling point of RS12a is -31. If you have a factory R134a system, use 2. As an air-conditioning refrigerant in newer automobiles, the optimal running pressure for R134A is between 22 and 57 pounds per square inch. Bottom line, R134a simply doesn’t cool as well as R12. From my research the compression is higher with R134a as compared to R12. It solves the high-side condenser pressure problems observed with R-134a, for greater reliability particularly in warm, humid climates. – pressure temperature c realcold this information has been fully checked for accuracy but is a guide only contact realcold staff for more information temp oc r12 r134a sp34e r409a r22 r410a r419a r407c r502 r404a r408a r507 this r134a refigerant calculator determines the gas pressure based on temperature of r134a refrigerant includes a. R-134a Retrofit Conversion Costs. Real nice, brass, Black Magic hoses, and MADE IN THE USA! He was a certified AC guy and taught me to do it right. Consumer Information about A/C Refrigerant Gases and R-22 substitute gases, US EPA information updated to 2012. Rather than trying to find some R12 and topping-out, I would like to convert to a R134a Retrofit. Yokogawa 3015-0627 All-in-one Refrigerant Leak Detector - R12/r134a LEAK DETECTOR WATER - AIR - GAS ELECTRIC STETHOSCOPE Includes Instructions Interdynamics R12 Freon Refrigerant With Leak Detector And Lubricant 14. RED TEK® 12a Hydrocarbon Refrigerant Replaces R 12, R 134a: 301: 12a 6 oz. The STV is adjustable, so it will handle the different operating pressures of R12 and R134a. The oil charge is a seal conditioner and system lubricant. Make sure you get the R-134Aand not the R-34A. Below is a pic of the 3 types of condensers used in automotive systems. Also, it seems that systems using the R134a refrigerant must utilize higher pressures to achieve the same level of cooling that was attained by the R12. com A detailed study of thermodynamic properties of an emerging refrigerant R152a has been discussed with respect to other conventional and non-conventional refrigerants like R12, R22, R404a, R410, R134A, etc. For oil quantities per component, refer to Oil Distribution charts in the Refrigerant Oil Distribution section below. The only serious problem is enviromental , because although 134A is ozone safe , R12 IS TERRIBLE. However, I've read where a conversion on 88-93 Caddy's is a problem because of the low temperature evaporator sensor. I read a few forums online that R-12 is incompatible with R134a, and another where theyre just fine together. R134a operates at a higher pressure. Pay particular attention to the R12 fitting size you have while ordering. Close the port every minute to check the pressure. Convert Auto R12 system to R134a Two ways to convert auto R12 system to R134a How to convert your auto R12 system to R134a. Oldsmobile refrigerant and oil capacity charts. is transferred to the refrigerant and converted to latent heat of evaporation of the refrigerant. An E30 R-12 system has a tube and fin type condenser, as most R-12 systems. I had the R-12 removed and recaptured by a trained professional. Used it the other day hauling some stuff and realized that ac is not cooling. At this time anyone can purchase R134A at their local parts store without any type of license. 1985-1987 Corvette Air Conditioning Conversion Kit R134a The best solution is to upgrade your R12 based system to R134A. Visit the post for more. com "making your life easier" COIL TEMPERATURE CHART INSTRUCTIONS Select design temperature for your evaporator and condenser-Match to approx. The STV is adjustable, so it will handle the different operating pressures of R12 and R134a. The EPA’s recent announcement, that it has listed R-1234yf under SNAP for use in mobile air conditioners designed for it, has increased interest in and questions about the new refrigerant. I had a non-AMC that needed to run about 220 high side to be good and cold. Got a 1993 chevy 2500 4x4 its just one of the backups with utility boxes. REFRIGERANT PRESSURE/TEMPERATURE CHART The RPT Chart Master is a compact digital pressure temperature chart. Get deals on automotive parts, truck parts and more. Is there a substitute refrigerant (like FR-12 or Freeze12) that can be used to top off an old R12 system? What is involved in converting the unit to R134a?. This will clean out any R12 left in the system, and allow you to get enough R134A in there to cool properly. Mixed refrigerants shows lower temp as compared to the R-134a at 50lit cabinet water condition. It definitely surprised me. Oversized systems (esp the condenser and maybe the compressor) are needed to get R-12 performance with R-134a. You pretty much have to go by the readings on the guage set rather than the old R12 sticker for what a proper charge is. You can still buy R12, but it is very expensive. The technician will simply evacuate the system, suck out as much oil in the system as possible or remove the a. In general, all refrigerants are characterised by two numbers: Ozone Depletion Potential (ODP) and Global Warming Potential (GWP). This simple fix recharges the R-134a (freon), stop leaks & gets your car A/C cold again. refrigeration system can be plotted on the P-H diagram. AMMONIA TEMPERATURE. Surely there are other differences than just the charging valves between a factory R12 and R134 system??? Anybody know any more about this?. Visit the post for more. Speedway, IN 46224 1-317-625-3846. Quitting smoking now greatly reduces serious risk to your health. Make sure you get the R-134Aand not the R-34A. Most of the problems you hear about R134A, is because they didn't draw the system down to negative pressure. since then, the industry standard has been R134a, which is an efficient replacement. Scott wrote to the list: > >Not being well educated (or mannered), especially in the HVAC department. mmmmmm law #5 - R134A requires higher pressure than R12 to Liquefy. If you have an older car it may have R12 refrigerant in the air conditioner system. R134A to R1234YF 6 pc. Manual couplers 3/4 turn full open to full close -- for easy and fast operation. The advantages of using R-134a over R-22 are with R-134a, as an HFC, having no phase out date and can be used permanently. If your vehicle lacks a high pressure switch in the air conditioning unit, it is highly recommended you install one. Just converting my 1988 944 to R134A. There was a request to add some detail and pics for the R12 to R134a conversion that I did to my 1985 Bronco. The cheapy conversion kits usually end in catastrophe anda $1,000+ bill. (F) Pressure (psig) Temp. You will also need to purchase a receiver drier specifically for R-134a. " Empty the R134A can until you are at the correct pressure. If no chart is provided, use the chart above this paragraph. For a survey of boards see chapter 3. part 2 Wise Auto Tools - Convert R12 Gauge Set to R134A. RED TEK® 12a Hydrocarbon Refrigerant Replaces R 12, R 134a: 301: 12a 6 oz. I know r134a produces lackluster cooling so lets get that out of the way first. The basic deal is this. Bottom line, some members have had success with the conversion, others have not. You pretty much have to go by the readings on the guage set rather than the old R12 sticker for what a proper charge is. Assuming the compressor is in good shape, the owner of this 1965 Mustang can convert from R12 to R134a. SUCTION PRESSURE symptoms can provide the real cause MAKE A SYSTEMATIC ANALYSIS Based on the complaint and measurements taken PRESSURE-TEMPERATURE CHART at Altitude – 5,000 feet above Sea Level BUBBLE POINT DEW POINT. COIL TEMPERATURE CHART INSTRUCTIONS. Collection Of solutions R134a Pressure Temp Chart Amazing R12 R134a Temperature Hi Lo Pressure Humidity Chart We collect this best photo from internet and choose one of the best for you, you can see Collection Of Solutions R134a Pressure Temp Chart Amazing R12 R134a Temperature Hi Lo Pressure Humid and more pictures selection that posted here was carefully picked and uploaded by admin after. Automotive Air Conditioning Discussion R-134a vs R12 Temp Pressure Chart. Car R134a A/C 1/4" Manifold Gauge Conversion Kit High Low Quick Coupler Adapter Car R134a A/C. We offer online. See the SCREW ON Hose ends. PRESSURE TEMPERATURE CHART °F °C °F °C PRESSURE VACUUM EQUIVALENTS Absolute Pressure Vacuum Below Apporiximate Vaporization above zero base one atmosphere fraction of Temperature microns PSIA mm Hg inches Hg one atmos. Now, the industry standard is R-134a, which is an efficient absorber and carrier of heat without the ozone layer-damaging issues of R-12. But it is hard to find and expensive. R134a uses different ports to charge the system and to measure pressures so the old R12 ports need to be removed and replaced or retrofitted with adapters. This kit allows you to convert yourA/C system from R-12 to R134a usage in a cost effective manner. If you have an older car it may have R12 refrigerant in the air conditioner system. This month we’re going to look at a job that every Vigor owner will have to consider sooner or later¾converting the A/C system from one using R-12 refrigerant to one using R-134a refrigerant. Recheck & Test the systems operation observing the Discharge Pressure & Radiator/Condenser fan operations. Of course, that was from a dealer, so take the price with a grain of salt, but BMW service bulletin B 64 05 96 states that the OEM E30 M3 A/C compressor is NOT/NOT compatible with R-134a and must be replaced with part number 64 52 8 363 550. R-134A System Pressure MAGNETIC Chart | Ac Pro For Ac Pressure Chart For. R134a effectively works in screw chillers where short pipe lengths minimize costs associated with larger tubing. You will need an additional can of R-134a to make 40 ounces. Temperature and pressure chart for refrigerants R22, R410A, R12, R134A, R401A, R409A, R502, R404A, R507A, R408A and R402A Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!. The basic deal is this. Do I have to change the compressor oil and replace o-rings , drier , txv valve ,etc. I've read elsewhere that R134 should typically be about 75% of R12, but I have no idea how accurate that information is. BETTER PERFORMANCE AND SAFETY! Patented hydrocarbon friction fighter enhances performances and safety. Convert and Calculate; Welcome to the OnlineConversion. It definitely surprised me. Change the rubber hoses to R134a approved type, which now is about all that is available new. I went to autozone, and used their leak seal freon, along with a new type of freon. Does anyone one have a weight conversion chart? The car takes 3. The video is a do-it-yourself guide on how to convert your vehicle's R-1234yf system over to R-134a. Stock runs with R12, but it's really only a minor cost to upgrade to R134a, and it can give you pretty much the same performance with a much cheaper maintenance cost in the long run given that R12 is about 5x the price. A/C System (R-12 to R-134a) Conversion. R12 systems use mineral oil. I installed the new adapter to the low pressure side and slowly approached 25psi, slightly after 25psi, the compressor kicked on and pressure indicator jumped to about 50 psi. R134a Pressure Temperature Chart Automotive. Air Conditioner (A/C) Conversion Kit, R-12 - R-134 This A/C Conversion kit will completely and correctly upgrade your fox body 1987-1993 Mustang's R-12 system to the newer R-134A system. 1977-1982 Corvette Air Conditioning Conversion Kit R12 To R134A Tweet 1977-82 Corvette R12 to R134 conversion kit has what you need to convert your AC system to R134. Replace the old receiver drier with the new unit with the new pressure switch. mmmm How to do that with Law #4. Thermodynamic Properties of R134a TetraFlouroEthane - CF3CH2F. Does anyone one have a weight conversion chart? The car takes 3. Generally speaking, in an R12 to R-134a conversion you install approximately 90% of the rated charge. First let me say that I'm no A/C expert. I never did the conversion since R12 cools better than R134a. If part number is not shown, head is N/A (Not Available). The R12 AC system has a very minor leak to were the compressor has shut down via the F47 code. Easily recovered with standard recovery equipment. At 0 deg C it is about 54 psi (compared to 30 psi for R12 and 28 psi for R134A) and at 65 deg C it is 330 psi (compared to 234 psi for R12 and 263 psi for R134A). I am wanting to up grade my a/c unit but I have the old r-12 a/c unit. I had the R-12 removed and recaptured by a trained professional. R134a A/C Conversion - Off-Road Forums & Discussion Groups. The conversion from the old R12 to the new friendly R134a is simple and inexpensive. The early ('63-'65) Rivieras used a Suction Throttling Valve (STV) instead of a POA valve. But it is hard to find and expensive. These devices began using 1,1,1,2-tetrafluoroethane in the early 1990s as a replacement for the more environmentally harmful R-12 and retrofit kits are available to convert units that were originally R-12-equipped. You can do most of the conversion yourself. Ass a refrigerant, a liquid capable of vaporizing at low temperature, used in automotive air conditioning, the U. pdf Free Download Here WARNING - Mastercool http://www. *PH: Pressure / Enthalpy. The main reason for going to the conversion was the prohibitive cost of the R12. The aftermarket states that you should be adjusted back 3 to 4 PSI with R-134a in order to achieve the same temperature. Low side is about 1/2" dia, the hi-side is about 9/16" dia. The conversion from the old R12 to the new friendly R134a is simple and inexpensive. This calculator converts from volume to weight (mass) according to the chosen substance. Thus, this chart is provided for informational purposes only and should not be relied upon as completely accurate. It's just a far easier proposition to keep the original refrigerant if that's possible where you live. The general retrofit kit includes parts needed for converting all R12 to R134a air-conditioning systems. Section V: Illustrated Sanden - Compressors FLX7 GV Style Rear Pad Head (uses. You will need an additional can of R-134a to make 40 ounces. with Pressure Relief Valve Horizontal Tab Freightliner Slimline Connections with Pressure Relief Valve Style GSA Lateral Pad Kenworth, Peterbilt with Pressure Relief Valve NOTE: All heads supplied with gasket. Absolutely non-toxic - 100% natural. R134a Low side conversion fitting R134a High side conversion fitting Accumulator dryer for the vehicle being serviced Assortment of R134a safe seals 8 ounce bottle of PAG 100 compressor oil 3 16oz cans of R134a Refrigerant containing a UV dye but NO STOPLEAK. ) Best results are obtained when the pipe is free of oxides or other foreign material. recover the existing charge in the system first. I´m considering doing this conversion on my 1992 S10 Blazer. Since R12 and R134a have similar, but not exact P/T curves, we need to adjust the setpoint for that particular refrigerant. Over 50,000 Brand New Auto Air Con Parts available. Refer to the R-134a Charge Port Adaptor chart and select the appropriate port adaptor which allows for sufficient clearance in the engine compartment to attach R-134a service equipment couplings and/or HPCO switches. You will also need them to fill the system with R134A. The factory charge of r12 is 2. Chlorine was found to cause damage to the earth’s ozone layer, and has been replaced with the newer and environmentally safer R134a. NU-22 - 120° condensing / 40° evaporator approx. The system should be recovered, vacuumed (min 20 minutes) and charged. The blended refrigerant R-134a is a long-term, it is an HFC alternative with similar properties to R-12. HC-22a ® and HC-502a ® require only a 40% charge by weight of HCFC R22 and CFC R502. Also, it seems that systems using the R134a refrigerant must utilize higher pressures to achieve the same level of cooling that was attained by the R12. --- Replacement compressors are factory filled with R-12 compatable compressor. RED TEK® 12a Hydrocarbon Refrigerant Replaces R 12, R 134a: 301: 12a 6 oz. We offer online. AC Pressure Charts / Reading Gauges (R12 and Retrofit) FRAMING JOHN DELOREAN - ON VOD www. Hydraulic Thread Chart. Use the one that fits each valve, don't try to force the smaller one on the larger, low pressure valve. R134a/R1234yf Airconditioning Filling Chart > (PC & LCV only! For Trucks see total list on www. Replace all O rings in the system with 134a compatible. I´m considering doing this conversion on my 1992 S10 Blazer. Convert Air Conditioner from R12 to R134. The general rule of thumb is that the system should take about 80-85% of the R12 number in R134a refrigerant. The new oil may plug your leaks. I have been using R-134a in the '89 for years and it cools great. The oil acts as a means of transportation for the refrigerant. However, the specific volume of R134a is somewhat more than R12, thus for the same amount of the refrigerant, the volume occupied by R134a is more than R12. equivalent). The advantages of using R-134a over R-22 are with R-134a, as an HFC, having no phase out date and can be used permanently. Manifolds are available with high- and low-side pressure gauges, but I don't think they are necessary. This means that in all the equipment where R12 is being replaced by R134a, the amount of refrigerant to be charge should be lesser than R12. Saturation pressure curves appear to be very similar between the two which would indicate to me there would not be any abnormal amount of energy at the condensing stage required to saturate the refrigerant.