Installing & Testing a Mitsubishi Ductless Mini-Split in a Tiny House with Brad Lemley

[@larryreid8562]

Purchased: August 2023 - still works GREAT!I kzbin.infoUgkxxsUnXhGsSJLim_XnMHyQK0u3XVaW-CGn live in a studio and during the summer it gets scorching hot - really old building with no ac units. I can’t express how EASY it was to install. This unit has been a life savior during the summer and some days during other seasons where it can still be a bit warm at night. In this small place is my friend, a husky, poodle mix and myself. We need AC - lolI don’t use the dehumidifier option - I’m not sure if it will leak in my house, since I did not install the small draining hose that came with it. May look into it late but I don’t worry about much humidity in the apartment. I don’t understand why the negative reviews since all things mentioned, I personally did not find issues with. Definitely worth it!

[@Ozzie4Para]

I loved the expression on the technician's face. He's like, "Would you please shut up so I can finish this job?" lol

[@dougn4942]

😂😂😂

[@lcainformatica745]

*Great product **Fastly.Cool** so far*

[@longnshorttpa]

This guy is spot on. I asked my buddy once, who is a certified ductwork engineer when he was working residential ( ten years or so, only commercial now) how many homes did he ever come across where the unit was installed correctly with correct duckwork. His answer? NONE

[@HomePerformance]

Spooky

[@KevFlaAVCHD]

A 6 to 15 hour evacuation on a home system is ridiculous. Watch his face as he's trapped into something he knows is BS. On a 3 ton 2000 sq ft home you can pull vacuum down to 500 microns (EPA rule) in as quickly as 15 minutes using good equipment. Check for any rise between 500 and 1000 microns within the next 10 minutes. Basically if no leaks and no residual water/ice in system, you're done in 25 minutes. But the main point is he should have done a pressure test with nitrogen FIRST. He did the nitrogen pressure test AFTER the evac showed a leak which was a total waste of evacuation time. Under nitrogen pressure, check your connections with bubble juice for leaks. No loss of pressure, no bubbles, means no leaks. Vacuum the system, release the charge, fine tune pressure/temp, and your done.

[@HomePerformance]

Just have to say, I’m slightly suspicious of anything that seems so cut and dry in every situation, or of super confident promoters of such methods. A lot of us have seen enough projects to know nothing is perfectly cut and dry.

[@KevFlaAVCHD]

I agree with you that nothing is perfectly "cut and dry", and nothing in life is 100% either. Some systems may require more effort to evacuate, maybe up to 1.5 hours, worst case scenario. Here is a link to a professional HVAC tech vacuuming a residential system with a 50 ft line set and reaching 500 microns in under 3 minutes. Then you can decide if I'm "super confident" or just stating plain and simple fact. kzbin.info/www/bejne/rYq9aYqrmdCmmJI

[@HomePerformance]

I’m just saying, have you ever installed a system in a tiny house on wheels in central florida as a favor for a friend who forced you to be on camera? Be nice to Brad, please.

[@gpmikey44]

Great video and very informative. However, if Brad was installing this unit properly he would have used nitrogen initially as per the Mitsubishi installation manual and stepped down the vacuum which would probably have reduced the potential for ice buildup. www.ecomfort.com/manuals/mzgeinstall.pdf Brad may do some things better than most contractors, but he makes the same mistake as 99% of them. They do not bother to read and follow instructions or manufacturers recommendations, which are typically necessary for product warranties.

[@livingstones1196]

Very well said! I must say that I am among the guilty 99%

[@howarddavis5083]

Michael Chappell 7

[@shishkabobby]

I have worked extensively with vacuum systems. A flush with dry nitrogen does a very good job of drying lines. Not on par with a 'bake out' but you can get most of the moisture out. The moisture is adsorbed on the inside of the hoses, so removing the air is really not enough.

[@sprockkets]

Mitsubishi's install guidelines are severely outdated. A nitrogen pressure test is good to test for leaks. However, Mitsubishi's guidelines were made with the assumption of micron gauges from like almost 20 years ago, where their resolution is around 100, and vacuum pumps that were single stage. Today you can get ones that have .1 resolution, and I achieved a 46 micron vacuum using TruBlu hoses, and a decay to 72 after ten minutes. At those levels, there is no need for a "triple evac" because you can't get 46 micron vacuums if moisture was present.

[@osiel9203]

If nylog is present use it for joints Nitrogen should have been used first, bubble leak detect it second And then finally evacuate. Proper procedure will save time.

[@alexf2349]

Could put in in external Parker Filter Drier as insurance for moisture also. Not stock on Mitsubishi.

[@sprockkets]

Never, ever, put a filter drier on a mini split. Mini splits also have built in filters in the right spots already.

[@joeshearer1247]

Brad seems like he's on the ball. I would recommend to him to start pulling through appion crt tool and always pull the shrader cores. If it really takes him 6 hours to pull a vac that is really too long. Also since it is a heat pump you really shouldn't call either line the suction line because in heat the small line is still a liquid line and the large is discharge line

[@HomePerformance]

Joe! Addressed your last point in the end of the video, where Brad kindly corrected me too!

[@joeshearer1247]

+Home Performance I'm correcting brads correction lol

[@sprockkets]

It's not a suction line either. It's an expansion line. It's still thin to make sure it doesn't expand that much after the EEV. Also, sure, in heat mode, it is the discharge line. But that's not specific to a mini split as normal heat pumps work that way.

[@robertmorcate846]

I loved your video on split units. So informative and full of technical details when comes to the installation and pulling a vacuum on the unit. Excellent, your video stands out over all the KZbin video on the split units. Brad should teach. I am in the process of installing my first split a/c unit and find this information imperative in Florida. Thank you and I subscribed to your channel 😊

[@HomePerformance]

Hey, thanks so much for the glowing review, Robert! Glad you found us, and we’ll be keeping on rocking your world hard as we can now that you’re a subscriber.

[@user-qb1pu5sb2f]

That’s a really nice stainless? mount for the condenser unit. What brand is it?

[@HomePerformance]

I had that custom made, baby! Hell yeah it’s nice!

[@bvovidz]

This was the best explanation and most informational video on the subject. Thank you.

[@HomePerformance]

So glad it helped! Thx for watching!

[@mattkime7615]

Why didn't you pressure test with nitrogen and you should triple evac mini splits

[@Froggability]

Triple vac on these is OTT

[@mghc7]

Do you recommend. A mini split for a non finished basement

[@HomePerformance]

Sure I guess

[@1984juant]

hey good info and the contractor seems to know but that instalation turned into nightmare. I love minisplits

[@HomePerformance]

All in a day's work, buddy! I love my minisplit too.

[@jorisbonson386]

18:20 onwards: re: mini split freon measuring. Are you essentially saying the DIY refill kits you get with the gauge that connects to the service port (and measure the pressure - has a needle in the 'blue' zone when the refrigerant level is correct) simply don't work properly?

[@HomePerformance]

I believe what he was saying is that you can’t measure superheat and subcooling using pressures, which is the main diagnostic used on split systems.

[@lancer9122]

My right ear enjoyed most of this. Thanks!

[@HomePerformance]

+Lance Preston left hand high five!

[@jspinosa50]

Are you too close to the wall, restricting intake airflow?

[@HomePerformance]

+john spinosa manufacturer's spec is 4" clearance, which we have.

[@jspinosa50]

Thans!!

[@emptech]

don't you mean ceiling? The unit mounts directly to the wall, I think we have a typo here.

[@HomePerformance]

There are two units, guys, indoor has to have clearance from the ceiling and outdoor must have clearance from the wall. The install manual tells you exactly how much.

[@myname9252]

Its a 6 k btu. If it were bigger,like a 24k,then more clearance is needed.

[@sheyballer]

Is your drainage the white pvc under the unit? Did you consider running the line on exterior?

[@HomePerformance]

+Shey Baesler yes it is, and I wanted it to follow the lineset. Less holes in the wall that way.

[@adamhamilton3757]

This is how to properly pull a vacuum to remove moisture from an HVAC system 10 times faster. kzbin.info/www/bejne/m3ivinSjn7yerKM Brad is using 1/4" hoses(too small) and yellow non vacuum rated hoses. The yellow hose is probably why he suspected a leak because they are permeable and will simulate a leak unde deep vacuum (500 microns). Typically the non permeable hoses are black or braided stainless steal. Brad still performed better than 90% of other HVAC techs www.trutechtools.com/Vacuum-Training_c_1100.html

[@jamesrrodgers]

thank u Adam u r very informative. this was the most informative video to date on a very efficient heat pump system

[@ericabercrombie6780]

You need at least 12 inches between that wall and the inlet of your condenser unit. Yours looks very tight!

[@HomePerformance]

4” actually

[@charvakkarpe]

If you read the installation instructions from Mitsubishi, they say to nitrogen purge the lines twice, once from 4000 microns to atmospheric, again from 1500 microns to atmospheric. I'm trying to figure out if I can get away without buying nitrogen, just pull a solid really good vacuum and hold it for days to let the moisture evaporate. But after watching this, maybe I'll try to find some nitrogen.

[@LakayRicky]

Hi I'm ready to install my inverter unit. But my AC guy said I should have it 12 inches away from the wall like the manual said. Can I get away with it if it's 2 inches away. Thanks

[@HomePerformance]

Follow the manual- ours said 4" clearance.

[@armandmelch8110]

You can't install these in the rain? I install these guys in Seattle ( rain city) everyday. 😂😂😂😂😂

[@j-mo2453]

They aren’t spending two hours from what I’ve been seeing as I watch these and prepare to install one. ?

[@HomePerformance]

There’s always shortcuts, and people love to take them. The consequences for shortcuts here are the same anywhere else in life.

[@j-mo2453]

Yes… sometimes they are worth it to avoid traffic, other times a glitch in the Google just shows you around town. Lol

[@aks20002]

For the Mitsubishi 6K outdoor unit, is only the wall mount air handler available in matching 6K capacity ? I am looking to pair that 6K outdoor unit with a floor console or one way ceiling cassette ( that fits between 16" joist ) but unable to find one in mitsu documentation.

[@cbaymac]

It would be nice to see how the hoses are hooked up from the start.

[@workhardforit]

any news regarding the erv installation?

[@HomePerformance]

+Kevin Go IT WORKS! Video of our Broan system coming in the next week or so!

[@jayhvac4474]

I honestly wish you would have let the Technician explain the video🤦🏼‍♂️

[@HomePerformance]

Don’t know if you could tell, Jay, but Brad gets a little uncomfortable on camera. Not everyone likes explaining videos.

[@46lfries]

Mitsubishi split are the best by far the problem they have a rectifier build in condensing /air handler unit so the motor inside is DC now that sucks try replacing that warning don't buy an off-brand piece of junk

[@46lfries]

This might sound strange I work on air conditioning 25 years most the time I did not use nitrogen most mechanics are in too big a hurry if you have that kind of setup that he has with a micron gauge I believe in go down to about 800 no moisture 😋you won't have to worry about leak checking anything but there is a lot of guys that don't have one the main thing is the let that set in a vacuum if you don't have micron gauge that needle on your gauges better not move , they recommend that you triple evacuate it that means evacuate putting in nitrogen dump nitrogen 3 time that is before they had micron gauge

[@chrisE815]

Aren't pressures very high when heating with a 410a system? Nitrogen pressure testing seems critical in these situations

[@fredsgarage1925]

Hello, I live in Tampa bay" area, what is the name of the HVAC installer/ your friend? I would like to use him for my work.

[@HomePerformance]

+Fred's E-mail Brad Lemley! His company is Uplifting Air- find them on facebook. He is the best.

[@mkipp581]

What is the procedure for folding out the line from the back of air handler to go out the wall? The line is folded in the air handler for shipping and I need to straighten it out to go straight out the wall.

[@Seedavis397]

Just bend it and run straight out. I do it all the time. As long as your not crimped your good.

[@craigoldenburg2584]

could have found leak with nitrogen pressure test

[@lonnierob2442]

Craig Oldenburg before pulling the vacuum. Would have saved all that extra work

[@myname9252]

Dudes more detailed than most HVAC vids here on tubeyou. My man. And I hope that HVAC stays honest. If the guys around me were honest and charged decently,I would have hired a guy to come fix my unit. Instead,I just bought a Mr Cool Diy unit and went through the hassle of installing one. And becasue of the over the limit prices, I will be investing all the tools for HVAC as well as getting my EPA certification. These guys want job security,do it the right way. Awesome vid man. Subbed.

[@HomePerformance]

Thanks brother!

[@chrisE815]

So you're going into business yourself?

[@myrnacasillan3061]

Just let installer do his job. We need actual connection to watch.

[@simonac688.]

never-but-never-flair-behind-the-indoor-unit.....BRAIZE...[solder]....26-years...experience....but-good-video

[@jorisbonson386]

That's how they come out of the factory - so kinda academic unless you're willing to void the warranty.

[@hounddoggzgaming6970]

True you will warm up the king valve packing and create a leak. Flair joints are the best way

[@Jerryh31]

Since you don't even know how to spell "braze", I believe I'll pass on the advice...

[@Jerryh31]

cameron yogibear Not according to Mitsubishi.

[@sprockkets]

@@Jerryh31 He didn't spell flare right either. You can braze the lines for the indoor unit (allowed per Mitsubishi IF you use Nitrogen while doing it, like you should on every braze job). Or just you know, learn how to make proper flares and use a proper torque wrench and then use Nylog properly. End result is flares that don't leak. That's how HVAC School does it, who is Kalos in FL.

[@jbenz1990]

I work for an hvac company and I despise of a minishit. You have a lot of people inquiring about them thinking they’re going to cost the same amount as a window ac unit. I can’t help but laugh at these idiots once they realize how much it costs to install plus they break down a lot.

[@akmackinnon]

Is the refrigerant actuall FREON or is it a different chemical?

[@HomePerformance]

Good q, +Al MacKinnon - turns out all coolant goes by the name freon, it's generic. Some companies brand new monikers on specific chems, but that's just marketing. Ours has R-410A.

[@bryanmartinez6600]

Al MacKinnon Freon and refrigerant both are the same the one all mini splits and modern central AC come with is R-410A older refrigerants are R-32 and R-34 R-134 R-134A and many more but the most common ones are R-410A and R-134

[@magatrump1291]

Al MacKinnon Freon is a trademark of DuPont it's just a refrigerant R22, 410A ,R134a and there's other refrigerator that they make

[@ForwardGuidance]

"Releasing the charge" you say this as if everyone know what that means. I don't remember it being explained in the video. The unit on the back of the home comes with refrigerate in the compressor ready for release into the indoor unit. What Brad was doing is remove air/moisture/everything from the indoor unit with the evaporator pump before releasing the stored refrigerate into that unit.

[@HomePerformance]

+Dwayne Dixon exactly- and also purging the entirety of the lineset of air and moisture.

[@calebayres6559]

Question; what would one do about air exchange and air quality. I am planning a tiny house trailer build. Would using a energy recovery ventilation device to pre dehumidify and exchange air be ran on a timed interval with a mini split. Am I right in saying it doesn’t look like the mini split exchanges air? Thanks so much if you answer my newby question

[@HomePerformance]

Ventilation Testing the Best Performing Tiny House on Wheels in the World kzbin.info/www/bejne/jqqXgKmgeslmf6c

[@bky28]

So I have watched a few videos and have seen two methods of testing the system. both leave me with the same question. After the test is complete does the system need to be under vacuum before you release the charge? What does it need to be at? can there be too much vacuum?

[@HomePerformance]

+Bryan Kingsbury yes, you don't want any air in the system when you release the charge.

[@bky28]

so does that mean I leave the full vacuum? or do I let off on the vacuum and just keep a little in there? Does this make sense what I am asking?

[@markscott4159]

it needs to be under full vacuum to release the charge.

[@jorisbonson386]

Surely this is self explanatory? If you let ANY air back in you're letting moisture in too... what would be the point of vacuuming?

[@HabitualButtonPusher]

This vid just saved me a major argument with the other half for the pros of a mini-split and hiring the best qualified person instead of the cheapest bid. She just said ok, makes sense. Subbing just for that! Cheers

[@HomePerformance]

So glad to hear! Thanks for watching and sharing!

[@Bass.Player]

I did car a/c for 30 years and never heard of a micron test and up until 2000 I was a IMACA instructor and still never heard of one. I also never had an a/c fail later when a evacuation was performed. Apparently these home a/c compressors are different and I did not know that you could not tell the state of charge on a unit with and electronic expansion valve using a/c gauges... Update: I looked it of and it's simply a "It is a very fine measurement that provides very detailed results" Meaning it's a much more sensitive method than ready vacuum with a gauge set...

[@calebminico3892]

Is this unit still functioning and in good order? Curious about the maintenance since install, and if there were any issues with this unit in particular. I have one of these myself and unfortunately have a few negative things that I'm experiencing. 1. Blower wheel bearing went out relatively quickly (within a year) and is rather noisy now. 2. During colder days (30°F or less) there is an intermittent high frequency sounding noise when the heat pump is on, almost squealing, like when air is slowly let out of a pinched balloon. Certain it's not motor related though. Any info or reference would be very helpful.

[@JDT738126]

Test? How about a pressure test buddy. Your supposed to do a 24hr nitrogen test @600 psi on those Mitsubishi split units. I'm sorry but this guy talks a good one but he didn't do the job right.

[@HomePerformance]

Interesting- who requires a 24-hr nitro test? I’ve never heard that.

[@JDT738126]

@@HomePerformance look at any installation manual that comes with the equipment.

[@WolleytheMonster]

Expansion valve vs orfice

[@MyGoogleYoutube]

When a vacuum is drawn the boiling point is reduced. A 500 micron vacuum puts the boiling point around -15 F. So, how can anything freeze? Was a torque wrench used when tightening the flares?

[@ajbeck2121]

In addition to a 150psi pressure test with dry nitrogen we also perform a proper vacuum on every system we install using a proper micron gauge, proper vacuum rated hoses, proper vacuum rated core removers, seal every connection with Nylog sealant and used a 6cfm SuperEvac pump. Every system gets pulled to less than 300 microns and this will very rarely take more than 10-15 mins. Good job overall! Have Brad check this out: kzbin.info/www/bejne/m3ivinSjn7yerKM

[@featheredcoyote5477]

I'd like to know how well this system would be on a small 12x24 cabin in lower Michigan winter's.

[@HomePerformance]

I know they have heen installing them in Montana, with no backup strip heat.

[@featheredcoyote5477]

@@HomePerformance Excellent! And I now wonder how it will work with my solar system. Completely off grid here

[@HomePerformance]

It will definitely do better than any other piece of equipment- Mitsubishi is the most efficient you can get.

[@46lfries]

Good mechanic.

[@markscott4159]

wrong all wrong. that unit is not running with only one green light on both lights have to be on for it to be actively cooling or heating. also that sensor called the isee sensor justs senses movement not temperature.

[@HomePerformance]

+Mark Scott sorry, but you should read the manual. Two green lights means it's catching up faster with a 4 degree F or more difference between reality and setpoint. And it has both a motion sensor and an IR sensor.

[@markscott4159]

Home Performance read the manual? my company sent me to the 2 day Mitsubishi class tough to by a technician that only deals with Mitsubishi to learn about the systems. I've also installed hundreds of them and serviced them as well. one green light means the the temp sensor on the wall head is beyond satisfied. and the Isee sensor just senses movement in the room and if it doesn't sense and it drops the temp 1 degree in heating no more than 4 degrees or raises the temp 1 degree in cooling no more than 4 degrees.

[@markscott4159]

Home Performance also your installer should have pressure tested the system with at least 600psig of dry nitrogen before he put it on the vacuum pump. and he should have done a triple evacuation as per the installation instructions from Mitsubishi.

[@sprockkets]

isee does do temperature. If you don't know that then it is confirmed, you don't know what you are talking about and shouldn't be installing Mitsubishi.

[@kansascowboy5721]

Great video great information that I did not know!! Thanks for sharing this much needed information

[@HomePerformance]

+Denny Clifton you're so welcome!

[@lv5960]

Great video !!! Thanks a lot for your time !!!

[@HomePerformance]

+Lo Vv you're welcome! Thanks for watching.

[@b-riair9114]

If you triple evac you wouldn’t have such a hard time pulling a vacuum the first time and quicker look it up take a Mitsubishi class don’t listen to theses guys odiously they didn’t read the install manual look it up triple.... evacuation.....

[@HomePerformance]

Everybody chill, this install had been going on for a week or two by the time you see it in the video. We weren’t aiming to make a step-by-step how-to tutorial, that would be both long and unnecessary. The install manual does it for us.

[@xjaimeduganx]

Thank you for the great content. Did you have to use a transformer to step up power from your panel to the unit? I tried searching other videos on your channel and website but couldn't find the answer anywhere.

[@HomePerformance]

Yes, we have an autotransformer that steps voltage up to 230 and cuts amps in half. So technically our house runs on 230v 7.5A service.

[@xjaimeduganx]

Is there any chance you measured the power usage for the mini split over a 24 hour period during the summer? I am trying to size a solar system using this mini split.

[@HomePerformance]

You need a cooling load calc for that. My house only needs the minisplit to run at 300W, but it runs all day on a hot one.

[@noeflores5794]

Doing research, I'm thinking this is better than geothermal for a 3 bdr single family home no more than 2k sqft.

[@HomePerformance]

+Noe Flores wholehearted agreement!

[@irianachie2257]

Noe Flores quote with Paylessminisplit.com 👍🏻

[@bryanmartinez6600]

Noe Flores look at multi zone mini splits your going to need a mini split of minimum 36k BTU but 42 will be best there will be one outdoor unit and 1 indoor unit per room some can have up to 5 indoor units per outdoor unit but on systems this large due to the amount of line set your going to need extra refrigerant as the company only puts enough for a certain amount of line set only enough for 1 unit at a certain length

[@noeflores5794]

HERPY DERPEDY Good point! Have to figure in the cost of the extra refrigerant as I would probably need 5 mini's on 1 outdoor unit. Since this would be a passive home. It's going to be very air tight so I'm trying to figure out if an HRV or an ERV is over kill. Thanks again!

[@HomePerformance]

+Noe Flores if you're going airtight, you absolutely need a balanced ventilation system.

[@bgregg55]

My understanding is its always better to place the outdoor unit on the ground rather than hanging it on the exterior wall due to vibration noise.

[@HomePerformance]

+bgregg55 that would have been great, except that we drove this house 13k miles across the US.

[@bgregg55]

that occurred to me after i posted that.

[@HomePerformance]

Yep, important to design a roof overhang over it or install it 4 feet up like we did.

[@craigoldenburg2584]

no condensate in heat mode

[@sprockkets]

Lol, of course there is. It forms ice on the condenser.

[@dmac2890]

Should Mitsubishi indoor cool only wall units have a release of nitrogen when taking off caps?

[@HomePerformance]

Not unless you put nitrogen in there...

[@cm7395]

Installation manual must have been overlooked, not supposed to trap condensate line on ductless unit. You have double trapped the condensate line which will cause an air lock resulting in a water leak at indoor unit.

[@HomePerformance]

Nope, we just wanted it air and bug tight at the outside end. And nope, no water leak problems- I don’t think this condensate line has a trap in it at all unless you add one- the pan runs straight into the pipe, no trap built in at the factory.

[@waynemcphail7825]

Excellent video

[@HomePerformance]

Thx Wayne

[@craigoldenburg2584]

u better not trap condensate tube u will have back up into unit

[@khoale4755]

Is the mini split system using any energy in stand by mode? If it is, can you turn it off at the switchboard?

[@HomePerformance]

Yes, it does take a trickle of power when ‘off’, like anything with a remote control, but I would advise not turning it off at your circuit breaker panel every time you feel comfy.

[@nickbrous]

I’m installing the 12k version of the unit you’ve installed here. My condensing unit will be located right outside the house, allowing about 4 ft for the lineset. Do you know the minimum lineset distance needed for this unit?

[@HomePerformance]

Yes, it’s 15 ft back when we installed- def read the manual

[@nickbrous]

Home Performance thanks! Unfortunately, it’s not listed in the manual, but I do have the 15 foot line, so should work out fine.

[@alexramos1435]

When your an HVAC tech.. everyone is your friend when its summer time. When you need something they don't even answer. Lol.

[@HomePerformance]

Sincerely feel sorry for you guys, yes. Like being a doctor, I'm sure, without the pay grade (but also without all the blood and death, hopefully).

[@markscott4159]

I install Mitsubishi mini splits for a living in fact I've installed hundreds of them and you absofuckinlutley can install them in the rain. as long as you do a triple evac and as an added sure fire way to not have moisture in the lines is to make all flare connections except for the liquid line at the out door unit and blast out the moisture with dry nitrogen then connect and tighten. pressure check to over 600psig then let out all but a couple psig of the nitrogen then start evacuating the lines and do a triple evac.

[@sprockkets]

Still doing triple evac? Make sure you post what company you work as to avoid you.

[@markscott4159]

What's wrong with a triple evac?

[@asherdie]

Does he also use a torque wrench on the compression fittings?

[@HomePerformance]

?

[@jeffscanlan3554]

Your explanation about being able to check for a correct charge after it is running is incorrect. You can use temperature to check if it is correct. As long as it can be run at full load 100%. I have done this with large R2 Mitsubishi systems. The same would apply on the small ones as well, but will agree the best way is to weigh in the listed charge this also takes away fractionalization issues if there was a leak and you were topping up the charge.

[@HomePerformance]

I believe Brad was referring to the difference between a minisplit and full split being there’s not a true superheat and subcooling attainable at the same points in the lineset. So you could get temps, yes, but what to compare them to?

[@jeffscanlan3554]

Home Performance Manufacturers specs on what those temps should be at the sensors in the unit under full load for that specific unit. Just stating that it can be done as I have just installed a large R2 Mitsubishi system and temp checks are what they use to check final charge. The job I was on had 3000ft of piping total on 7 different systems. And pressure testing is what should be done prior to any evacuation at 600 psi manufacturers spec.

[@HomePerformance]

Large systems and mini-splits are different in this respect, though- that’s what his point was.

[@59seank]

Great video! How did you handle the condensate line from the head unit?

[@HomePerformance]

Simply follows the lineset in the wall, and ends with a trap just before the end of the line under the outdoor unit.

[@59seank]

I pictured you having to route the condensate line to a drain inside your tiny house. I'm glad it was so simple. Will the head unit produce condensate in freezing weather? I'm AMAZED at how quiet the head unit is.

[@danieloberholtzer4238]

@@HomePerformance Why do you need to install a trap on a mini split? Ive never seen one one these units before. only on central units.

[@HomePerformance]

Otherwise you have an open air leakage pathway directly outdoors, for one.

[@livingstones1196]

This was too painful to watch....couldn't finish.

[@HomePerformance]

+Maurice Brown thanks for popping by for a quickie then. ADD is real.

[@b-riair9114]

Brad doesn’t triple evac?

[@Quietstorm3333]

6 hour vacuum lol rookie

[@MW-C-Music-Copyright-Free]

WooW Good Job ;) You Rock Man

[@craigoldenburg2584]

super sexy?

[@HomePerformance]

Yes.

[@MrSea86]

Home Performance pfhdj

[@dylanreischling4151]

How’s the Mitsubishi holding up? How does it do in lower temps?

[@HomePerformance]

Still going like clockwork. 13,000 miles later, and 2.5 years in.

[@dylanreischling4151]

Home Performance wow! That’s awesome! I’m working on designing a Mitsubishi system for my aunts new house. We will be using the horizontal small ducted air handlers for her house

[@MRSketch09]

Interesting. Thanks for sharing.

[@MrSteviewonder3]

Can you walk through how you air sealed your mini split hole? Looks like you used pvc then taped vana around it? How did you airseal the line inside the pvc? With call or foam?

[@HomePerformance]

+MrSteviewonder3 tape and gaskets from 475 High Performance Building Supply! Check them out.

[@MrSteviewonder3]

Home Performance ok cool! I understand and see you did that around the pipe. But what about the space inside of the pipe?

[@HomePerformance]

+MrSteviewonder3 the pvc is only for condensate. The lineset is separate.

[@MrSteviewonder3]

Home Performance yes but what prevent the air from entering inside the pvc? Is there a damper or?

[@HomePerformance]

+MrSteviewonder3 aha, I understand your question. There is a P trap in the line, which is full of water all summer long. I also tested the leakage through the PVC during the blower door test, and it was minimal anyway! That video is on our channel too!

[@IntelCoreI77700K]

11:46 What a shitty way to carry a baby.

[@HomePerformance]

11:46 what a shitty way to watch a video about hvac. Go back to your cute cat vids and stay out of my parenting.

[@IntelCoreI77700K]

+Home Performance Lol, that's your kid? God damn, poor thing!

[@IntelCoreI77700K]

+Home Performance I didn't come here for that scene, nor was that first comment directed towards you. I found this video very informative until you made that reply, and I found out that was your kid.

[@HomePerformance]

Thanks for clarifying then, my friend!

[@Monophony1]

Is it a 115 or 208/230v unit?

[@HomePerformance]

+Matt Medders 230

[@Foche_T._Schitt]

Micron gauges vary greatly on accuracy. Even from the same manufacturer.

[@besttinyhouseever5465]

This is Great! I've been looking forward to a vid on your HVAC system! Lots of good information, I'm in the early stages of my build and was planning to setup the split myself. How DIY friendly is it? Does it make sense to set it up and just have a guy come out like Brad to test it before you release the freon?

[@HomePerformance]

+SimpleTinyHome, I did nothing to install this system except assist Brad. Very iffy to DIY if you're not an experienced pro. This stuff is pretty heady, and also pretty dangerous to health and home.

[@bryanmartinez6600]

Home Performance if you do diy stuff and have a knowledge on working on homes these units are much easier to install than a central air

[@HomePerformance]

+HERPY DERPEDY i do not encourage DIY in general. I'm a building diagnostics expert and a quality control inspector, so I'm not really a DIYer.

[@hollyd1392]

How much electricity does this use?

[@HomePerformance]

+Holly D 200-500W in cooling or drying mode, only up to 800W in heating mode. Amazing.

[@hollyd1392]

Wow that's significantly less than I thought it would be. Hell, my induction cooktop is 1800W. Thank you so much for responding!

[@HomePerformance]

+Holly D exactly

[@Bajaheat]

How many btu is this unit in video?

[@HomePerformance]

+Bajaheat 6000 btu, or half ton. Heat mode about 7-8kbtu.

[@timtuttle2109]

small line is Trans-Gas line both are cold, or hot if you buy a heat pump and are running in heat mode, which is why they are both are insulated. good job an proper evacuation and leak checking, often I will pressurize the line set with nitrogen first before tightening the last flare connection, to prepurge lineset. seems to make the moisture evacuate quicker, thanks for letting me put in my 2 cents.

[@HomePerformance]

+Tim Tuttle thanks for the tip!

[@bryanmartinez6600]

Tim Tuttle how can a diy get nitrogen for doing this on his own these things are much easier to install as they don't require brazing like large central units

[@theruckusdj]

is it 110 or 220v?

[@HomePerformance]

220

[@theruckusdj]

How does a THOW run 220?

[@HomePerformance]

Autotransformer. Doubles voltage, cuts amps in half, same wattage output minus about 10% efficiency loss.

[@vasilelungu2199]

A lot of empty talk. Not much of substance

[@HomePerformance]

Thanks for such a substantive, meaningful comment.

[@debbiewidner5676]

Vee Lu Helpful For us.

[@jorisbonson386]

Master of lightning wit, backchat and repartee...

[@steveelim]

The technician has no chance to talk when the other guy loves the sound of his own voice.

[@HomePerformance]

Steve, think I’m a jerk if you really want to, but Brad really didn’t want to be on camera. It made him nervous. I was trying to make it easy on my friend.

[@adrianbrown7586]

all of these mini splits are nothing more than over-complicated Chinese junk

[@HomePerformance]

+Adrian Brown you'd have a right to your opinion if you had tried literally every minisplit. I've used ours for over a year and a half every single day, and tortured it constantly, and it works better than you do. I can vouch for this one.

[@robertsample42]

Adrian Brown : DILLIGAF!!!

[@ihatecrackhead]

since 2018, you need a license to install these, even DIY versions

[@Farroutman1]

That stinks.

[@JJ-nh8lv]

You can buy these units online from many different websites, without a license. Some areas will require a permit to do any work on your home, but that doesn't always mean that you have to have a license.

[@ihatecrackhead]

@@JJ-nh8lv incorrect, you need a license since 2018, they changed the wording. doing any work that could inadvertently cause a freon leak, even hooking up gauges, require a license on all greenhouse refrigerants, probably not R718 though. EPA regulations

[@JJ-nh8lv]

@@ihatecrackhead incorrect or not, what I said is a fact. The sad reality is, the EPA doesn't enforce a thing. They got no teeth. You can purchase R-134a. R-410a online and delivered to your door. NO LICENSE CHECK. R-134a at Walmart. No license check.

[@ihatecrackhead]

@@JJ-nh8lv that part is enforcement, but if you install your own AC, i can call and talk to an agent directly and get part of the rewward. maintenance company i worked for didn't want to pay extra for a license, so they gave R22 to anyone and gauges, someone reported them and we got the maximum fine $32,500 BUT they had at least a 100 violation documented in work orders, If they fought it, could have gotten worse. Not sure how much the guy reporting us got, wasn't disclosed who it was, I think it was a licensed new hire who trained with an illegal. I thought everyone had a license but some were illegal The EPA did tell us you can be illegal and get an EPA cause they don't require a SSN be submitted just an ID