Haier Ductless Mini Split Refrigerant Pump Down

[@adobemastr]

This was a good video! Both of the speakers were wearing wired Lavalier microphones so the audio was excellent, and they did not add any loud, annoying, or inappropriate background music to overpower and ruin the dialogue. Excellent job!

[@nickstewart3]

Just what I was looking for. Clear and to the point, thanks fellas!

[@robertofranciscoriverabibi3264]

Gfg

[@misenko856]

Guys, nice video but what about to purge the yellow hose before evacuation ? At the end compressor creates a little bit of vacuum as you said and suck in everything what was in yellow how. Since you did not purge it, then it sucked this oxygen in a hose, which is pretty long by the way, into the system. Or am I missing something ?

[@sudhirtirkey3234]

I do in a different way. The machine is kept running then hose is attached to the suction pipe. Running presssure is less than standing pressure so attaching the tube is easier and refrigerant leakage will be zero or less. Second, the discharge line should be closed slowly so that there is no sudden pressure shock to the compressor. This I think is a better way of doing.

[@LC-qi5ff]

Totally agree with you

[@misenko856]

Good point to attach the gauge hose when system is running. But I would also purge the hose after is connected, there might be lot of oxygen trapped and at the end it's all sucked into the system. I saw several videos like this from pros so I'm not sure what's going on. And I'm just amateur enthusiast...

[@robertinogg]

What about the air in this yellow hose?

[@extremeair1199]

Yes could have bled that while it was running before pump down, and also good idea to run compressor for a min before closing off discharge valve.

[@b5a5m5]

Your "de minimis" release can be reduced a bit by adjusting the valve core depressor in the hose fitting. And also by getting some core removal tools.

[@LC-qi5ff]

And by attaching hose when system is running (less pressure in suction line)

[@MarcelHVAC]

@@LC-qi5ff And use a hose with a schrader pusher

[@christopherkrueger4328]

EXACTLY what I needed. Thank you.

[@IAmAnAiAndroid]

the gauge and service hose will have air/moisture in them when you connect, once you turn the unit on won't that pull it into the system? Wouldn't it be better to connect a gauge directly to the service port without the hose to reduce the amount introduced or is it just negligible?

[@MarcelHVAC]

He should have pull vacuum on that line first,

[@misenko856]

@@MarcelHVAC Or purge it with little bit of refrigerant in the system. How you want to pull a vacuum on that hose if it's already connected to AC ? Only wat is to have that special safety - leak free valve which connects to 5/16 port. So after connection the hose they just should open valve on a manifold for a second...

[@misenko856]

Not immediately but for sure at the end of evacuation once compressor creates a litle bit of vacuum. All what was in the hose after connection is now sucked in the unit...

[@brobb5767]

Well explained and straight to the point 👍

[@EmersonSwaninc]

Thank you!

[@ericrmccormick]

He didn't bleed the line so he is sucking a little bit of air back into the system.

[@robertberin4872]

When I preped my mini split I didn't realize my schrader valve wasn't being depressed and released the refridgerant into the system. I didn't start it. Should I do what he does or should I evacuate the system and recharge it.

[@joesutera6940]

Noticed the same thing

[@BYENZER]

At 4:38 mm:ss: No mention of FSCit: FSC - 'Front-Seat=Clockwise' At 08:00 mm:ss: NO, you did NOT pull all the refrigerant into the 'compressor'. It's in the receiver tank (if equipped) and the condenser coil, mainly. Otherwise, an EXCELLENT VIDEO. Keep up the good work!

[@themrmoy40]

looks like the used before, locos🥴

[@BYENZER]

@@themrmoy40 Pardon?? No comprendo.

[@dennisdoroshenko6582]

@@BYENZER he's cracked out on a good one

[@misenko856]

Those are just details :) A bigger problem is that they've sucked all the air in the the yellow hose into the system at the end of evacuation...

[@BYENZER]

@@misenko856 YES! That too. Good catch. Nowadays, im noticing many such KZbinrs are intentionally making mistakes, just to generate clicks and comments to up their KZbin incomes by jacking up their "engagement" numbers.

[@TomTom-nk2rt]

Thank you very much for the really detailed and easy to understand explanation in your video, tiptop

[@rpsmith]

No eye protection and no gloves! That's how real men do their work! :o)

[@b52tricopter]

We don't need no stinking PPE.

[@gennarocaputi1700]

Hello ,,what about when the unit is not operating ?? Can you push the charged lines back into compressor any other way ? With a vac pump ? Or is that sucking only and cannot push , gas back unto compressor ??

[@michaelcostello6991]

Good video guys. Thank you I am replacing a faulty unit. I may not be able to get the compressor to run !!!! I guess it needs a full recovery procedure otherwise

[@coolsriz]

Hey Michael, can you summarize how you went about doing this. I have the same challenge with my Indoor unit malfunction. So have to do a full recovery procedure.

[@misenko856]

If it's faulty why just not close discharge and suction valves on the unit and just disconnect it ?

[@MelvinAlc]

Do set it for cooling when doing the retrieval of the refrigerant back ???

[@kadeemantoine2335]

Best video I have watched

[@mrgoggles1963]

How would you do a pump-down on a multi zone mini split?

[@aqualife3389]

After the refrigerent is pumped in Shoulbi shut down the unit by remote or shut down the outdoor unit from outside?

[@Sneakybeave]

I just shut the service port and pull the disconnect. Careful when disconnecting the line from the system as it will be filled with high pressure, likely liquid refrigerant, wear gloves.

[@MarcelHVAC]

@@Sneakybeave and glasses

[@misenko856]

@@Sneakybeave What ? There will be no pressure in the hose or lines after evacuation and after you close the valves... There will be more likely vacuum.

[@craigrobinson4161]

Great video guys. Went to check pressure in my unit. Got a static psi reading of 25lbs. when I hooked up gauge. When I turn the unit on, in cool mode, line pressure pressure quickly decreases to -10hg vacuum. Turn unit off. Pressure quickly rose back up to 25lbs. Is it a Leak or a clog or just super low on 410?? Im leaning towards a clog. And how that would troubleshooted. Thoughts? Thanks.

[@harmonicwaves8375]

Did you ever figure this out? I have exact same issue...

[@sarkisbalanjian7999]

Is the blue gauge closed or opened?

[@savoy6]

Great video!. Thanks guys

[@Kopano-Mocumi]

Well understood thank you.

[@richardgibbs00]

Witch one do you open first to release refrigerants back

[@marconantel7735]

Thoughts on this vary, my vote is the suction line

[@reyrey9634]

So in mid winter..if you want to pump down the heat pump...same procedure for heat mode?

[@misenko856]

Hair drier 😀

[@keyronruddock9770]

Very nice and simple 👌

[@ride-it-outtimandtoni232]

Check your copper line sets that white ISO POLAR insulation is causing an acidic climate when wet that creates pin holes in the copper. I pulled out a run and put up a video of it leaking through little pin holes over a 15 ft span. Still have another 160 Ft to pull out and the suppliers and manufacturers are trying to hide the failure and pass costs on to you.

[@nealalderman7095]

Always do.

[@benarrocheilyes1284]

How about the app! How it works?

[@nampam3945]

How long in minutes did it take to pull down the refrigerant?

[@anyname367]

Takes about 40 sec

[@nampam3945]

@@anyname367 Wow thats fast, small volume I guess. thank you

[@KeenPotato]

Haha why leave the compressor running when you have both service valves closed? Pull disco then close suction service

[@rivera9185]

We can do same on Four Zone Ductless Mini-Split ? Thank you

[@EmersonSwaninc]

Yes the method is the same on multi-split units as well.

[@VirgilioNabor-cu7xk]

@@EmersonSwaninc , Hi, meaning turn on all the indoor units at cool setting at the same time then closing all the valve once go to zero and shutdown the main switch?

[@Talentman18]

Thank you

[@joeyysossa4144]

Did you pull a vacume to a -30 psig???

[@Sneakybeave]

Any amount of vacuum will do. One you have it in a vacuum the losses in the line set will be far below an oz, probably in the grams of refrigerant.

[@misenko856]

@@Sneakybeave But one should not forget to purge the hose before evac, otherwise....

[@AsBi1]

Very helpful

[@RoberthSilas-z4f]

Mantap

[@jeepaz79]

great video

[@rondail5675]

Well done!

[@icidro1]

great vid..can you pump down your system without a schrader valve in it?

[@kw1984]

Presume so. The valve is just to attach a guage to monitor the refrigerant being drawn back into the condenser.

[@misenko856]

I can't get this. What do you mean without Schrader valve? Schrader valve where ? On 5/16 service port ? That valve is there to hold refrigerant in the system and you can't remove it if there is refrigerant in the system. But if you mean to pump down the unit without manifold gauge and hose then yes, this is also possible. But you may leave some refrigerant in lines and needs more experiences.

[@mdsaifmdsaif3328]

Malti ac pamp Don gas recovery please sar

[@devinbenoit8370]

What size adapter is that

[@EmersonSwaninc]

Standard r410a hose adapter, female 5/16 SAE x male 1/4 SAE. Can be purchased individually or in kits such as yellow jacket.

[@EmersonSwaninc]

One more thing, the contractor should have two of them and they should always check for a good o ring before use.

[@HVACR-Airman]

Dimaximas release low loss fittings are required by EPA standards

[@MrKdebolt]

Amateur hour. Sucked air into the system because you didn’t purge your ridiculously long service hose. It’s also not a liquid line on a mini split. The metering device is in the outdoor unit.

[@tombomombodombo]

How do you purge the hose?

[@misenko856]

@@tombomombodombo you connect it to service port and open the valve on manifold for a second or so.

[@danielivoicila1860]

You need to be EPA type 2 not necessary to be EPA 608.

[@HVACR-Airman]

Why cant you just pull down to 0 PSIG ?

[@misenko856]

You can, why not ? But those gauges are not that precises so if you want to be sure you've evacuated everything you may want to create a little bit of vacuum.

[@hvacandvrvspecialvedoindus7891]

Haier Vrf pump down setting 😊l 🙏

[@EmersonSwaninc]

We don't currently have this video but it is something we can look at making in the future. Thanks for your interest.

[@Fastrose328]

8:19 seems pretty enlightend but when it's time to let the other guy share (older male) his mood went down. :) once a hater always a hater. 🙏

[@johnbohmer4319]

What's up with the lineset? Somebody let corky play HVAC tech for a day?

[@gorillaxrich]

That wasn't a tiny release of refrigerant... That was venting... Your the trainer??? WITH NO GLOVES...

[@CarlosDelaoGunEngraver]

looked painful

[@gorillaxrich]

@@CarlosDelaoGunEngraver Exactly, he knew he'd better stop it frostbite or not or they gone frost-bite his bank account 😄...

[@briekhnaa]

Tiny amount 🤔

[@pokerbuddy2227]

My flare is leaking, so I’m going to try this vs paying some dude 700$

[@pokerbuddy2227]

Worked perfectly

[@gf2e]

Thanks for posting the update. I always wonder if people succeeded. This looks a lot easier than using a refrigerant recovery system. I’m planning on installing my own mini split and didn’t realize you could just suck the coolant back in!

[@MarcelHVAC]

@@pokerbuddy2227 You should not have done that with a leak in the system

[@misenko856]

Did you re-flare the pipe or what did you do ? Probably just tightening them up would help as well or ?

[@fon75]

I am not at all sure this is correct. The coolant in the compressor is now contaminated with the air that was in the yellow hose!

[@Sneakybeave]

Wear gloves, please. That “completely normal” release of refrigerant he was talking about can give you serious frostbite. Don’t be like this guy.

[@airplanenut6242]

That’s the truth! Even that tiny amount is super cold!

[@Fastrose328]

Add a public comment...

[@robertofranciscoriverabibi3264]

Fff

[@akuuab]

No gloves, no eye protection.

[@user-bj4lp3fr1o]

No gloves and no eye protection.

[@ictviamfortruthgoogleisspa5886]

hey put yo shitty mask on too,, just in case, some bullshit gov created virus gonna get in yo trought