The rx11 flush is for small systems,I usually use suction and liquid driers with removable cores.It is less time consuming and I think does a better job.Thanks for posting this and showing that this flush is not easy.

When I working on hvac they were using r22 and I did a lot of compressor burnouts. I would have removed the piston and flushed the system with nitrogen, remove the burnt compressor and try to get as much junk out of the system with blowing nitrogen through it. Remove any filter dryers and install a new filter dryer for suction and liquid line. Put a vacuum pump on it over night and come back in the morning when the system is in a vacuum, turn the vacuum pump off and close the gauges. Remove the line from the vacuum pump and insert it into a bottle of acid neutralizer to suck the neutralizer into the system. Close the gauges when done, connect the jug of r-22 and turn it upside down and add liquid Freon to system. Start it up and then turn the container right side up and charge system. Go back 5 days later and pump the Freon back into compressor so you don’t loose it all and throw away the liquid line and suction line filter dryer and install a new liquid line filter dryer, purge the lines or put a vacuum pump on it. Open the service valves after you purge or vacuum and check Freon charge. By not going back 5 days to a week you risk damaging the new compressor because the chances are high the filter dryers are plugged from removing the acid from the system. I did not have to go back a year or 6 months later to change a compressor the had electrolysis from not getting all the acid out. Pistons get clogged easily and not removing it when flushing the system with nitrogen is a road block that you don’t need and I never isolated the evap and condenser from system. Worked in the field for 40 years and the company’s I worked for had me doing a lot of compressor change outs because they got tired of going back in 6 months to a year and changing compressors. Only had one 10 ton in Iraq that the line sets were not accessible and could not be changed out and the system had multiple burnouts. We could not flush all the contanamitds from the system and we tryed. It was a long time ago and the suction line was 1 1/8 or 1 3/8 and a very long line set going through a bunker. New compressors every 3 months what a nightmare that job was. No way to install a new line set. The Freon after 3 months was dark gray. Lots of nitrogen and filter dryers and acid neutralizer. If it was not in a war zone where everything would have been accessible and materials readily available I would have done a complete system replace with new line sets. Sometimes you have to do what you can with what you have. Trying to get acid neutralizer and filter dryers and nitrogen in Iraq was not an easy task and a job no one wanted on that 10 ton which was located on the roof of the bunker. Glad that at 60 I don’t have to mess with a/c units anymore. My back as taken a toll. Last but not least after using a vacuum pump over night on a compressor burnout do not forget to drain the oil from the vacuum pump and add new oil so you don’t end up burning up your vacuum pump. That’s all folks. That worked for me over the years. My advise take it or leave it. Your choice.

The only thing you should use is nitrogen, to blow out any contaminated oil. The only thing that belongs in a system is oil and refrigerant. Refrigerant is a very good solvent, so install the proper driers to protect the compressor, and change them out until the oil is clear and acid free. You may have to replace the metering devices, and the reversing valve if it is a heat pump. If you have a 110 foot line set, and didn’t take the proper precautions, I’ll bet all of that refrigerant ended up in the compressor, causing a flooded start. This can cause mechanical damage and or a short to ground. The reason you were having so much trouble with the evaporator flush is that you left the accurator piston(metering device) in the system. It was behind the flare, not at the distributor that you pointed to.

@tedhicks5431

Жыл бұрын

Yes you could see the retainer ring moving good thing it didn't blow out across the room when he pressurized through suction side

Getting ready to do my first flush on a small system. Thanks for the help. Great Video!!

I just used some Rx11 flush on a 14 ton rooftop today. I split the evap and condenser coil to flush them out individually. I was surprised that we didn't see that much coming out the other ends. Mostly it was white and brown dust coming out and then only a little bit of liquid.

Your videos are the best ever i seen. I really thanks for your hard work. I love your job and explanations

Fantastic chanel. Very informative videos. Thanks you Ken.

Best video on rx11 I’ve seen Thanks

15:23 That's the metering device trying to back out. You should have removed it first. That's why you were having a hard time blowing out the evaporator. 15:45 When you pressurized the low side with nitrogen, you were lucky the metering device didn't blow out the high side and into your chest

When you flush lines put tape over your discharge or wherever you want it to come out and poke a tiny hole to help build pressure and push it through the lines,coil, or whatever

@caradocapcunobelin2875

3 жыл бұрын

I'll try that next time, thank you! In conjuction with using nitro or no way?

@andrewkraemer5745

3 жыл бұрын

@@caradocapcunobelin2875 flush then immediately follow with nitro

@caradocapcunobelin2875

3 жыл бұрын

@@andrewkraemer5745 thanks man. Installed a mobile home package unit today so didn't get the chance to try your tip out today sadly. Will let you know how it works for me homie.

@caradocapcunobelin2875

3 жыл бұрын

@@andrewkraemer5745 Tried to do this on an evap coil today. The back pressure shot the R11 flush into my eyes when I was done using it. I normally wear sunglasses but these peoples basement was dark in the corner where the AC was. It doesn't help that they sent me with a replacement TXV so I assumed the unit already had one when in fact it had the smallest fixed orifice that I've ever seen. My eyes will be fine, I blame myself for not taking this stuff seriously and bringing down more lighting.

@caradocapcunobelin2875

3 жыл бұрын

@@andrewkraemer5745 I blame myself for not checking the metering device not you man. Still want to try your trick but just on the lineset first. I replaced the lineset today so no need to flush. I would have taken it out if I had known.

the way you explain is perfect . i learn a lot from you .. i wish i can work under your professional advice. keep on :-)

I was actually told recently by someone at Nucalgon not to use RX11 in an evap coil because in his opinion you could not get it all out afterward. This coming from Nucalgon themselves.

@hvac01453

7 жыл бұрын

think about it… what if someone told you that refrigerant flushed in an open system would get trapped in there even open to atmosphere? You saw his hand started to freeze a bit…. it boils at over 100F, thats at 0 PSI, pull 30” on it and that boiling point will have it boiling at below freezing temps I’ll bet or there abouts… .Alcohol boils at 178F, and with just the cap left offat room temp, it would be gone in no time flat… Rx 11 is a solvent, in years past we use to use R11 or R13 and it worked great. So they outlawed it. If you could blow 22 through it, that would work too but wouldnt that be expensive now, not to mention illegal.

@keepthinking2666

6 жыл бұрын

RideTheWind correct it says on nu-calgons instructional video

nice video Ken, it was good to see, helps to see it done sometimes from a different point of view to bring a new understanding to whats happening.

excellent video. would you consider making one on refrigeration starting sequence.step by step. also one to interpret the schematics on a true refri. or freezer. thanks

@keepthinking2666

6 жыл бұрын

caliljv they are simple of you can't follow a wire diagram you should not be messing around with units true units are very easy power in goes through tstat to compressor basically that's it

we make fittings out of misc. copper so it is completely sealed from rx11 to fitting of whatever you want to blow out.

Nice video Ken.

I've had the same challenge with that stuff. burns yours hands and it it doesn't boil off that quickly,,,I've sat there for 3 minutes released and all liquid flush shot back. or I've used the loop system they sell to connect the lines so you can flush easily with one person. also I use a damp rag help against the open end your not flushing into.....good videos ken

@mikeclark1756

6 жыл бұрын

Denis, I'm not a fan of Rx 11. Never needed it back in the day. Blow the system out with nitrogen. Put in a HH suction line drier . A oversize liquid line drier. Run a long vacuum . Go back in a few days and check the oil. The suction line drier should come out( though in my experience years have gone by and the suction line drier was still in the system).

@mousearebec

2 жыл бұрын

@@mikeclark1756 Every system we replaced after a burn out, had a failed compressor in one to two years. Very corrosive, and if you have any that is not removed...... trapped for example in a low spot of the refrigerant line...... it WILL damage the new compressor. Flushing with Nitrogen just can't be depended on, nor the deep vacuum. We have had 0 Compressor failures since stopping our use of it.

@MarcoGonzalez-bi6cg

2 жыл бұрын

@@mousearebec so then just blow the system with nitrogen and vacuum and not use RX right ?

@mousearebec

2 жыл бұрын

@@MarcoGonzalez-bi6cg EVERY system we have used the RX11 on has had a compressor replaced within 2 years. If it were a "clean" system and simply a changeout from R-22 to R410A...... flushing it well with Nitrogen is all that is necessary. Some say to use the AC Renew. Nahhhh all about selling products..... overpriced ones. Interesting how many excuses we heard from so many about why all the compressors were failing. $90 for a large can of RX11, was often the first step in our experience, to future compressor replacement. But on two story houses where you see a long copper run, that has dips in the line where some of the RX11 could "pool" slightly, even a single story house......Be aware of that. I do realize a good vacuum 300 microns should vaporize that substance....... not so sure. RX11 contrary to what some will tell you, is not good for the motor winding in that compressor. Have not lost one compressor where the lines were properly flushed with Nitrogen alone. Just don't scrimp on it.

Good video. They sell an rx11 with a connection for the nitro so you don’t have to switch over.

should expansion valve be removed when nitrogen is pressure ?

@KenTraining

3 жыл бұрын

no pressure on system when you open the system.

where does the acid come from ? Because the oil was burned / overheated during the event?

@KenTraining

7 жыл бұрын

The acid comes from the compressor electrical failure (burn out), windings and oil and refrigerant together.

Can pressurizing a R-22 trane coil with a fixed metering device to 350PSI cause a leak in the coil? I think that's why we couldn't get our vacuum to pull below 1300 today. Had it on for 2 hours and had an 8cmf vacuum pump on a 2.5 ton system with a 15ft lineset. Usually the vacuum is done in that time on the same job when switching both condenser and coil. Does the vacuum just take all night on a burnout job where only the condenser is changed and old evap gets flushed and reused?

@caradocapcunobelin2875

3 жыл бұрын

I never pressurize above 150PSI with nitro unless I use flare fittings then I go to 350PSI but they put me with a tech today and he knew better. He also diagnosed the system so maybe he just didn't catch the leak in the coil. But the unit did seem to hold the 350PSI.

Never use line set flush on a compressor burn out . You don’t get it all out you have then introduced a solvent that will strip the oil from the new compressor and lead to premature failure

@mousearebec

2 жыл бұрын

And no one could tell us why we were having all the compressor failures. It is...... IS the RX11 that you don't remove that is destroying the coating of the winding in the compressor. We don't use it any more and have had no compressor failures.

Wow that stuff is hard work Ken! I usually just fit a big burnout drier and go back and check after a day or so, if its still acidic i change the drier and compressor oil, easier to do on fridge systems i work on though. What cause the original compressor to fail?

@KenTraining

9 жыл бұрын

heavydiesel Don't know, just know the compressor was grounded.

@joeshearer1247

9 жыл бұрын

+heavydiesel long lines with gross overcharge of refrigerant due to mismatched old carrier indoor unit and no way to stop off cycle migration.

@KenTraining

9 жыл бұрын

Joe Shearer I cant help the long lines. the units to have the same tonnage. as for the off cycle migration, can you explain what you mean? There is a built in check valve on the discharge side of the compressor.

@joeshearer1247

9 жыл бұрын

KenTraining if I were on the job I would convert the indoor units to expansion valve as there is going to be a pressure drop with the long lines and those older 10seer air handler very probably do not have correct size metering device you need. I would also install liquid line solenoid at the indoor units to stop the warm liquid refrigerant from migrating to cold Evap and suction line during off cycle - and slugging when it restarts. On the suction side I do think 5ton is pushing the limit of 7/8 suction line over 100ft. There is a lot of great info online just google York long lineset guide.

@KenTraining

9 жыл бұрын

Joe Shearer ok, thanks for the info.

Ken, was the contactor welded in. On grounded compressors the contactor usually needs to be changed

@KenTraining

6 жыл бұрын

I don't remember now, but you are 100% correct. the contactor should be replaced along with the compressor.

i used the gasoline or benzene ,its very active way but carefully used.

@michaelkranz2529

7 жыл бұрын

Benzene is a VERY dangerouse carcinogen , I would not even get near that stuff

That's a lot of oil blown out of the suction line... maybe the compressor burnt out due to oil not making it back to the compressor...

one functional ghetto way: i just isolate the compressor and disconnect the suction line, use a lacquer thinner. to fill the condenser + lines + evap let the thing do it' job for 10 minutes and use hot compressed air to discharge the lacquer thinner and keep the compressed air run thru a few minutes to make sure all is dry. close the circuit, braze the new compressor, vacuum, recharge. never got a call back.

I would use the R11 flush, but i would never use the acid away, i believe only refrigerant and oil should only be in the system, nothing else.

What happens if you do not clean acidity in?

@KenTraining

9 жыл бұрын

חיים עוזר זוסמן you will kill compressor quickly.

The metering device is behind the liquid line flare fitting , not at the distributor , did you notice when he was trying to flush through the flare fitting , it moved , behind the flare is a piston , & an " O " ring Believe me, I have changed MANY leaking o rings on those coils , most people think the flare is the source of leakage , and never realize there is an o ring behind the flare !

@tedhicks5431

Жыл бұрын

Carrier product

Not for vehicle ac?

I would have removed the orfice piston and then flushed.

@techfive7202

8 жыл бұрын

in this case, it was a cap tube

@michaelkranz2529

7 жыл бұрын

IT WAS NOT A CAP TUBE , the piston is behind the liquid line flare fitting !

How do you do it on condenser with txv ?

@KenTraining

4 ай бұрын

I am not sure.

Is ken the only person that doesn't know the orifice piston is removable?

You are better off blowing the system out with nitro and installing two driers that have a high acid capacity. Then change them out after some run time. All that flush is still in the system.

@KenTraining

9 жыл бұрын

Rob HVAC you are probably right, this was my first burn out to deal with. I could do what you said and still add the acid scavenger to system.

@ZuffaLtdDanaWhite

8 жыл бұрын

+KenTraining exactly what i did a few months ago. Acid scavenger, HH acid core suction drier, and larger capacity liquid line drier.. went back after a weeks time, Acid checked and all is good now.

@javawong369

5 жыл бұрын

If acid are gone after you come back for checking it, Do I still replace the HH acid core suction drier, and larger capacity liquid line drier?

在台灣你的技術你開業的話 你的工作做不完!可以賺錢 台灣每家每戶都有空調設備

New condenser, new line-set and good drier, I be done we that job

Take retainer ring out and piston

Exactly what not to do in a burn out!!! No one should do what ken did, someone gave him some bad advice!!! But he will know better next time I hope.

@KenTraining

7 жыл бұрын

no recommendation from you on what you should do? if you could include that, it would be helpful.

@dougsnyder3209

6 жыл бұрын

What would you do different?

That’s a lot of oil in the suction line may the oil wasn’t making it back to the compressor also I didn’t see a oil trap !

the acid neutralized looks like a medicine

@hvac01453

7 жыл бұрын

Its alkaline in oil to try offset thelow PH. A common alkaline we use is sodium Hydroxide to clean coils. Its 14 on a PH scale of 0-14. It’ll make aluminum fins smoke… feels like oil on your fingers when in all actuality its emulsifying your skin.

You lost a good amount of Rx11 in the system you will see the side affect soon.The system cholesterol will go high.

seems to me RX-11 flush is useless, never seen anything dirty came out of it. might as well just use nitrogen alone.

@KenTraining

4 жыл бұрын

I heard another tech use acetone then follow up with nitrogen to flush out, then the filter/dryer and change out after a week of run time.

Putting yourself in danger, need to find a way to close up the connections.

well there went 200$

Meh, that Rx-11 just didn't look effective at all. I guess the big question is, is the system still working since the new compressor was installed? 7 years on I'm wondering if it has held up. This video is causing me to lean towards a new system, but I don't know how effective duel dryers would be as an alternative.

@KenTraining

Жыл бұрын

I lost that building in 2017, it was running at that time.

@kevinJmadsen

Жыл бұрын

@@KenTraining Thanks! Have you usef these products on another compressor replacement that you were able to monitor over a longer period? Have you tried any other methods with success?

@KenTraining

Жыл бұрын

@@kevinJmadsen I have not. This was my only compressor burn out.

i think the filter dryer and orifice tells you all internal story of a burned compressor. some tim flushing become more costly then the price of new lines .

@hvac01453

7 жыл бұрын

yeah, I noticed you were trying to push that crap through the strainer in the liquid line connection. Once, you almost pulled it out, then stopped,,,all that crap is sitting in the bottom of the condenser,,, hope you have plans for several clean up driers, on both sides.

This is good video but it is easy to do in a laboratory. I would like to see how you would do this if the line set is coming up.Rubber connection for me is not good design. Should be real engineering.

Good video. I'm not in the hvac business. I've heard of people just blowing the lines clean using acetone, instead of that high $$$$ snake oil bs, and then blow dry with the Nitrogen.

@joeshearer1247

9 жыл бұрын

I've heard that too

@chrism7275

8 жыл бұрын

+Cooll Asice not snake oil we use it on burn outs and it works

@hvac01453

7 жыл бұрын

no way to really know if it works. This was not actually applied to manufacturers instruction. They actually want you to disassemble much of the unit, like the TXV or metering device and get gravity to assist you in getting the oil out. I would rather blow it out with CO2 or nitrogen as best I could and install an oversized activated charcoal drier (HH) with flare nuts with two refrigerant ball valves, and change the driers several times to clean it up. Worked in years past, nothing has changed. If you want to flush the lines, blow em out then chase em with new oil to pick up any thing left over. Oil is alot cheaper. Id be asking myself, why did the compressor fail? Especially with all the oil in that bucket. Piping was either not trapped properly or lack of pitch.

@michaelkranz2529

7 жыл бұрын

Acetone doesn't break down the oil , won't work ,

Do you use this if i change from r22 to m099?

@KenTraining

5 жыл бұрын

I would assume yes, But I have never done a R-22 Conversion.

@stephensmith3184

3 жыл бұрын

I drop mo99 directly on top of R22 no reclaim no flush just remember to start using your 99 upside down like410

I do appreciate the video Ken but these companies selling small quantities of flush are doing a disservice to the industry. To properly flush that system would take gallons of flush. It's expensive and they know it wouldn't sell in large quantities so they market it in these little piss bottles and make a fortune on the markup. It does have its place on short small diameter line sets that are going downhill with no traps to collect the liquid. For the new compressor's sake I hope you can get all of the flush out of the system so it doesn't thin out the oil. Huge amounts of nitrogen at very high flow rates are needed to get the liquid out and you can't flush the evaporator with any metering devices or restrictions. You will fill the tubing up with flush and it's almost impossible to get it back out because of the very restricted nitrogen flow. All of that flush that didn't come out will need to be removed by vacuum now. Lots and lots of time and many oil changes. Please do a followup video and let us know how it turned out. Best of luck!

@gfriedman99

9 жыл бұрын

Nicholas CeeA They say blow it out with 120 psi nitro.

@nicholasceea4109

9 жыл бұрын

+Gene Friedman The pressure doesn't help in this case without a large enough flow rate to pick up the liquid and carry it out of the system. The blowgun among other things is limiting the flow.

@sbitschy

7 жыл бұрын

Everything you(Nicholas CeeA) said seems to make sense. How do you clean burnouts then?

@nicholasceea4109

7 жыл бұрын

Ya just gotta to do the best you can with a bad situation. Install a suction line filter drier meant to neutralize acids and monitor them frequently. Best to install one with a removable element and keep changing it out until the readings are under control. Pretty much impossible for a field tech to do but doable in this scenario. Then remove the dryer or element after its work is done but that usually never happens either.

@atalanskiy

6 жыл бұрын

Nicholas CeeA have you tried to use R141b for flushing?

WHATS WITH ALL THE NOISE

@KenTraining

Жыл бұрын

sorry, loud room

You are getting no oil return on a line set that long so the new compressor is 🤮

You must remove the flow-rater from the Evap-coil, then your product will flow through much faster.. Speed is the answer to clean,,, good luck, lol

You are gonna lose more and more compressors if u work with these systems.

@KenTraining

6 жыл бұрын

very insightful. you are going to get reply's like this with your vague posts.

After 2 wks I would change those dryers 🤮

@KenTraining

4 жыл бұрын

yes good call.

You are going to continue losing compressors on these systems Ken. There are specific things you need to change and install for them to be healthy. Right now they are not. At least the two that you have done video of compressor changeout.

Zz

Never seen crappy work like this,Do not use the bucket connect a hose then run it to the bucket.

@KenTraining

4 жыл бұрын

Such harsh words. I was trying to do a good job...

@jaimepadilla6530

2 жыл бұрын

😂