Must add some ester. I have put a in with R12 on a few older cars that I didn't want to invest too much in and didn't mind taking a little risk, with no problems. Two years and counting on my daughter's Volvo with no ill effects, and it's doing a great job with this hot, humid summer we've had in Detroit.
You can't beat R, but a is cheaper, more environmentally benign, and works well enough. Last edited by zeen; at PM. Originally Posted by LandYaghtLover. BB code is On. Smilies are On. Trackbacks are On. Pingbacks are On. Refbacks are On. Forum Rules. All times are GMT The time now is PM. Add Thread to del. User Name. Remember Me? ShopForum Gallery. Mark Forums Read. Thread Tools. ScottieInBoca Registered User. Join Date: Aug Posts: 9. Wodnek Vintage Mercedes Junkie. SunGuy Registered User.
RadioTek Registered User. It's an Adventure. LandYaghtLover Registered User. AlanTbird Registered User. Another major difference is the type of oil both refrigerators require.
R12 is compatible with mineral oil, and most R12 systems use this. Finally, Ra is much smaller than R12 on the molecular level, and thus moves and behaves differently. This also means that some refrigerant conversion needs to be done in order to drop Ra into a R12 system.
On top of the retrofitting, the R12 system needs to be properly cleared of the refrigerant. With the differences between the two refrigerants in mind, it goes without saying that charging an R12 system with Ra can have some serious negative effects. For starters, R12 systems and Ra systems are designed differently to accommodate the gaseous state of each. Ra systems work at higher discharge-side pressures than R12 systems, which could lead to compressor seals leaks.
Additionally, since Ra is composed of much smaller molecules, it has a greater chance of leaking from an R12 system. Another issue comes into play with the type of oil used in the system. As previously stated, R12 systems usually use mineral oil, which is incompatible with Ra. When Ra comes into contact with mineral oil, it can hinder the oil from returning to the compressor, or possibly reduce heat transfer.
This means that the mineral oil cannot be dispersed through the system properly, which can then lead to significant damage to the internal compressor and refrigeration system that will be costly to repair. Ultimately, no. In order to legally use Ra refrigerant in an R12 system, it must be converted or retrofitted to be able to properly use Ra, and all R12 must be properly discharged and captured prior to charging with Ra.
Use your wrench to close the service valve that you will see on the condensing unit's low-pressure side. Now, close the high-pressure side's service valve just slightly. Melodia Gamallo Pundit. Can a car lose Freon without a leak? In a properly sealed system the gas can continue being compressed and released over and over, so long as it doesn't leak out. Gener Frombges Pundit.
What year did ra replace r12? The year was In RA was implemented. R12 refrigerant was still used because stock piles were made in anticipation of the stop of production. Arritxu Mendilmechoa Pundit. Can AutoZone recharge AC? When it's time for an AC recharge , turn to AutoZone. You can shop online for same day in-store pick up or go to your local AutoZone to find the right AC solution for you and your vehicle.
Rene Karin Pundit. Can you replace r22 with a? Ra refrigerant is an alternative that contains no chlorine and hence no ozone depletion potential.
It's a greenhouse gas, though, and it doesn't work as well as R Reyna Tombrink Pundit. How much a do I need? One can of Ra typically holds 12 oz. Calisto Weiden Teacher. How do I know if I have r12 or ra? R12 fittings look like a tire valve stem, with threads on the outside. Ra fittings look like a air hose 'quick connect' fitting. Kylian Muns Teacher. Are r12 and r fittings different? There is a lot of differences between the R12 and the Ra fittings , you can't mistake them.
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