AC refrigerant recovery Automotive single hose method 

Yes, use a filter dryer to protect your machine. Especially when it’s a burned out compressor and it has that fine black metal, flake shavings in the oil that are ultrafine like 2000 grit sandpaper. And when you have everything new brand new seals on all your hose connections, when you first tighten them up overtime they will get loose quickly and cause a vacuum leak . So, after about a weeks worth of work, remember to recheck the tightness of your hose fittings were there permanently attached . You’re going to get ready for a little bit of frustration as you learn how to use a micron gauge . It’s a educated learning curve that you must put yourself through because there’s gonna be times you just don’t understand what’s happening . Watch all the videos from Jim Bergman, that I have recommended in the past about vacuum . I have even recommended a free PDF download of something several hundred page or 1000 page book all about vacuum . Because when you’re reading microns compared to 1 inch a vacuum on an analog meter . 1 inch vacuum is like reading your odometer on your car going down the highway in measuring 1 km But reading microns individually is like driving down the highway using your odometer and attempting to read 1 inch or 1 foot . So any imperfections in your vacuum including your own seals, hoses, valves, ball valves anything micron gauge will read The micron gauge will even read moisture in refrigerant that has absorbed into the lining of your refrigerant, charging hoses and throw your readings off, making that much higher

Just the show that you can recover refrigerant with a single host you don’t need a manifold because you’re not testing you’re not diagnosing anything you’re just simply removing refrigerant getting it ready to be worked on or recharged.

I unscrew and back out the high side service fittings then move the hose over to the charging tank of fresh refrigerant. Purge some of the fresh refrigerant through the same charging hose to the end of the service fitting attached to the vehicle Set it on the weight scale and zero out. And then add refrigerant as needed to manufactures weight specifications

@@coldfinger459sub0 Thank you very much!!!

@@coldfinger459sub0 After breaking the vacuum from high side with fresh refrigerant, I can now start charging the refrigerant from the low side gradually with engine running or off?

@@ferdieedquiban9047 or if you completely understand the three gas’s laws and you know how to manipulate them to your advantage. You can completely recharge the refrigerant quantity by weight in a liquid form through the high side. With the engine off through the low side in a vapor state the majority of people will only get so far and then the refrigerant will stop flowing.

@@coldfinger459sub0 Got it. Thanks again

mountain klima because people try to use them to recharge or top off the refrigerant. This is a false way to do it. Because depending on the heat load and air flow you can get a clear sight glass with 1/2 the refrigerant charge and still get 39F to 45F out the dash on a low heat load day. I have shown this to many tech and owners of shops as a demonstration when I run across this situation. Then I would recover the refrigerant and show them how much weight I removed. Them the same goes for a bubbly sight glass being 100% full . It is a bad method to use to fill by sight glass. Back in the old days it worked ok just ok with R12 with fixed displacement piston compressors. Large condensers large evaporators. Compressors that weighed 35 pounds made out of iron, slow rpm engines, I sold compressors had 6 ounce oil sump pumps with internally built oil pumps with a pick up tube cross drilled a crankshaft that had an oil feed system like a real engine. With bearings the size of silver dollars. Extremely durable you can make mistakes on refrigerant charge and they would still live. Nowadays small aluminum compressors that could fit in the palm of your hand with tiny bearings the size of your pinky finger or a dine in diameter. They have to over rent them and spend them up at much faster speeds on small engines that are high rpm compared to 40, 50 years ago. No more oil reservoir sump pumps with oil pumps built inside of them anymore they completely rely on a full refrigerant charge to carry back oil like an aerosol mist squirting out of the can of WD-40 that is nice and cold to keep them alive.

All the refrigerant recovered from cars is considered dirty possible air contamination moisture contamination in every different type in style and viscosity of oil my new amounts that come out and I’ll gets mixed together in one tank. Then once the tank is full the refrigerant gets recycled where all impurities are removed and you end up with clean dry moisture free oil free pure refrigerant to reuse all over again. And if you do not own a refrigerant recycler machine we take it down to our local commercial HVAC warehouse that has a third-party recycler program where are you bring in and hand them over your filled tank of refrigerant and they hand you back a fresh new empty refrigerant cylinder to refill again.