Tool List- www.amazon.com/shop/acservicetech Support- www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Here is the link to the Fieldpiece ST4 Dual Temp Meter- amzn.to/2wc1ME3 Here is a link to the JB 6 CFM Vacuum Pump amzn.to/2nqbvo8 Here is the Link to the Appion Blue 3/8" to 1/4" Vacuum Hose- amzn.to/2uYlVyc Here is the Link to the Appion Red 3/8" to 1/4" Vacuum Hose- amzn.to/2uYg6Ro Here is the link for the 2' long 1/4" by 1/4" vacuum hose amzn.to/2LXa0e9 Here is the link to the Appion Valve Core Removal Tool- amzn.to/2uYr8WL Here is the Link to the Fieldpiece MR45 Recovery Machine- amzn.to/2xAOpN6 Here is the link for the filter drier- amzn.to/2veVV3m Here is the link to the Yellow Jacket 1/4" by 1/4" heavy duty hose straight- amzn.to/2umtcod Here is the link to the CPS Vacuum Micron Gauge- amzn.to/2v1nM3O Here is the link to the Supco 1/4" by 1/4" coupler- amzn.to/2xkYT43 Here is a link for RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn Here is a link the Nitrogen Regulator amzn.to/2bXdR5f Here is a link to the Digital Refrigerant Scale used in the video amzn.to/2b9oXYl Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos amzn.to/2aenwTq Here is a link to Refrigerant hoses with valves used in the videos amzn.to/2aBumVI
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Excellent video and channel! One tip or recommendation I like to add is that is best practice to replace all schrader valves when retrofitting to M099. In the absence of R22(or other previous refrigerants) there can be a tendency for the neoprene material seals of the schrader valves to shrink (expand or adjust) and cause a leak. Replacing the schrader valves is a good preventative, relatively inexpensive step for longevity of most retrofits. ~ Enjoying your vids often! Nice work!
Hey KungFuMaintenance, this is a no oil change refrigerant so you don't have to change mineral oil with POE. Because of that, seals don't have to be replaced like on a r-22 to R407C. Valve cores should be changed out just because they are old though I agree. Thanks and you do a great job on your videos and content!
Glad to see positive videos about R22 conversions. Too many techs just want to sell you new systems, so they make conversions sound risky, dangerous, not-as-efficient, etc.
@@estherbarbara It's not set in stone, but one of the independent a/c contractors are likely to be more helpful than one of the large a/c companies. Also, the end of the summer season or out-of-season is the best time ... when a/c guys are not very busy. In addition, you have to weigh up the cost of R22 (which has skyrocketed in price) versus a retro-fit. If you only need very little R22 added to each unit, you might do better with a top up. Finally, you might post your requirement on your local FB group and see if any a/c guys respond. (Just be warned ... as I mentioned above, most a/c guys are going to want to install you a new unit, as that's where they make money!)
Update...i found a technician that did the retrofit of the units into R-427a. They are running great now. Plus a sealant I bought was added to them. Thanks
I am amazed everytime I watch a video here. The correct way of doing anything refrigerant related, is always displayed, with exact E.P.A. regulations always observed! I cannot thank you enough!
great video, Im going to replace my siezed reversing valve. only question I have is do I add any oil into system? I have no way of telling how much oil came oujt under recov.
Hey Cesar, this refrigerant has to come out of the bottle as a liquid. That is why I only added a small amount at a time. You can also use a vaporizer like the imperial 535-C. If it was vapor then you could just keep the low side handle open as long as you would like before stopping and checking the superheat or subcooling again, thanks
Do you have to completely take all of the r22 out like if you are only a little low can you top it off with the mo99 because I heard you can mix the two. Thanks for a really good job
No, I had recovered the R-22 before I had an empty system that was vacuumed down to 180 microns. After vacuuming, I added 6lb 4oz into the liquid side. Then I started the unit up and weighed in refrigerant while checking the charge. Never mix M099 with R-22 or mix any refrigerants together as stated by the EPA section 608, thanks
Yeah it was very close. M099 will end up being a little less weight than what r-22 would be for the same size tubing. Basically we weigh in 95% of what the r-22 factory charge would be with M099 and then check with superheat or subcooling accordingly to add the rest of the refrigerant while the unit is running, thanks
Thats the beauty of MO99 you don't have to open the system, but in the benefit of non condensable and cross contamination I thought it proper to change the filter dryer. You have the must instructional HVAC channel in youtube. I really enjoy your videos.
Yeah since it is already at 0psig after recovery, and since you are doing all the work already, it is best to change that filter drier for the remaining life of the system, thanks a lot xrayneoo!
Those refrigerant gauges are yellow jacket brand and they have been around a long time and are reliable. That is what all my students used in the classroom as well. The ST4 is the dual temp temp reader and you can calibrate that. All tools used in the video are linked at amazon.com/shop/acservicetech and I also have a few linked above in my other comment, thanks Deepak!
I use one manifold for r-22 and M099 and another for R410a and R407C. Yet another for R134A. We do what we can without going crazy about it, thanks Shawn!
No, just change the filter drier unless there was a burnout or high acid contet. M099 is supposed to work with the mineral oil. Thats what they added the 600 and 601a in the refrigerant mix but nothing is really going to beat R-22 for mineral oil. I do like R407C with POE though, thanks and check the manufacturer's download -www.chemours.com/ISCEON/en_US/assets/downloads/k23356_8_basic_steps.pdf
Hello, I would like to know your steps on retrofitting n22 to R407c, I see and read different info all the time. Do you believe the line sets need to be flushed with rx11 to convert, your thoughts welcomed.
Question...just replaced a compressor(heatpump)..I pull a good vacuum , add mo99 slowly in suction side about 90% of the r-22 ...I didn't install filter dryer neither I flush the lines , I have piston.... My problem is I can't get superheated ... In another the suction is 132 and head 188 psi... Compressor making a hissing noise...I had charged it with ANY running...ANY INPUT...s.o.s...
i was out for 6 years medical leave union local 250 L.A. Is flushing the line set to rid it of the old oil used with the old refrigerant proven to work long run or is the jury still out?
I do think it works well but only for line sets that are mainly vertical and they won't flush evaps and condensor coils very effectively because they don't go from high to low. Once again, we do what we can when replacing burnout compressors and changing out r-22 systems to r-410a when reusing linesets. Always replace the filter drier. I replace the lineset when it is easy enough since newer equipment use larger vapor lines for efficiency, thanks
Yes that is correct. It has to come out of the bottle as a liquid but has to enter the low side of the system. The low side has a lower pressure than the bottle pressure where as the high side pressure has a higher pressure than the bottle pressure so refrigerant goes into the low side slowly and wait in between charges. use a 535-C for charging if there is a concern of liquid going into the compressor, thanks
I'm starting to find a few systems with mo-99 my question is if I find a system with a small leak but customer wants to just top off the system, is it ok to top off with this blended refrigerant?
The consistency of the blend will certainly change and won't be as effective as before. It is best to find the leak and fix. The other thing is that it will be more mixed and leak mixed if it is leaking while the system is running. If the system is off then the blend really gets out of wack, thanks!
R407C has a better energy efficiency than M099 when matched with comparable equipment but financially it may not be worth the time and effort to cut out a compressor, dump the oil out and scale new POE oil in. M099 was meant to be a fast replacement and I really prefer it over NU22B. They now make new outdoor units with POE and R407C for condensor replacements, thanks Robert!
After changing the recovery, replacing the filter drier, pressure test, vacuum and as long as you don't see any issue with oil return via the existing system then yes. It is used for air conditioning applications, thanks
When installing a new condenser, say a Gaurdian with POE and stating to use R407C, can MO99 be used instead? I've had great results with MO99 and would like to be consistant with it.
Useless information. Not all Acoils have txv and everybody don't have superheat gadgets and says nothing about pressure on a r22 line. So 90% of a r22 reading works well.
