DIY MULTI-ZONE Ductless MINI SPLIT Installation in New Construction!
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- Äas pĆidĂĄn 10. 04. 2021
- Learn how to install a DIY multi-zone ductless mini split system as new construction rough-in! This DIY mini-split system provides air conditioning and a heat pump for heating, plus this multi-zone unit allows for independent climate control, all with one outdoor condenser! bit.ly/mrcoolmultizone
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// Tools and Materials Used :
đŠ MRCOOL DIY Multi-Zone Mini Split System : bit.ly/mrcoolmultizone
Fire Block Foam : amzn.to/3dVl7zs
Stud Guard Plates :
Drywall Screw Gun & Cut-out Tool : amzn.to/3g1Zosg
Collated Magazine Accessory : amzn.to/3dQQkUx
Collated Screws : amzn.to/2Rsg423
Line Laser : amzn.to/3fxsAqV
4 ft Level : amzn.to/39yOGFT
Joist Drill : amzn.to/3uFvX3f
Impact Driver : amzn.to/3ddbLAd
Silicone Tape : amzn.to/3wPy0UC
Tool Belt : amzn.to/2L4iNfl
Sensibo Air : amzn.to/3dROAKB
TrueWerk T1 Shorts : bit.ly/3y5kc8O
TrueWerk EDO Pants : bit.ly/3y5kc8O
TrueWerk T2 Hoody : bit.ly/3y5kc8O
đ Get 15% off TrueWerk clothing using code CRAFTED15 here : bit.ly/3y5kc8O
// About The (Not So Tiny) Tiny House Build Series //
Iâm building a 630 ft2 tiny house / guest house in our backyard and covering the whole process, start to finish.
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As a structural engineer, drilling such large holes through the plates is a no-no, but an easy fix is to strap across using CS16 straps on either side. Or using 2x blocking between the studs just below the top plate and strapping across there. Ditto for the sole plate.
This is so very helpful - thank you! I've been looking for hours how to set the minisplit lines through an interior wall - 2 x 4 non-load bearing bottom plate myself. Going to try to go with the smallest hole size I can, but these lines are thick.
This guy starts every statement with..." As a structural engineer"
As a structural engineer you have zero friends
@@TheDarkdanik says the guy trolling folks on the internet over comments that are 2 years old
I was wondering the same thing after seeing such large hole! Thanks for explaining this!
I'm actually fairly sure you open the refrigerant valve first THEN check for leaks (I noticed you added sound deadening before opening the valve too). Either way, great video!
The attention to detail on this project, especially around air sealing the exterior envelope is commendable. I work on high performance and passive house multifamily projects and the types of details you are installing are exactly what we should be seeing for efficient and resilient buildings. One issue we see is that as you say in the video, these types of minisplit systems can be way too over sized for smaller homes. You may find that come summer time, you struggle to fully dehumidify the home. The issue at play is that the systems have so much output that they can meet the cooling demand for the building before they have a chance to effectively dehumidify. If that becomes an issue you could try only running one of the minisplits and leaving the doors open so that the cooling demand for the building is better matched to the output of the unit. You just need to ensure good air circulation between the spaces.
Interesting video and very instructional. A couple of suggestions though:
Leaks should be checked after the valve off the unit is opened. It does no good to check for leaks if the system isnât pressurized. Also, even though the unit is pre charged it is a MUST to put the evaporator units and lines under vacuum. These lines introduce air and dirt into the system otherwise. Any moisture and dirt from the manufacturing process will cause issues with your entire mini-split system and will lead to malfunction and or failure.
Otherwise excellent video!
mr cool lines are pre charged at the factory,
Nice trick with the laser to hit the studs with the drywall screws!
Oh yea, works great!
Its funny that they dont show how to vacuum the lines and check for keaks this inf is half ways poor video no thanks. Sorry
@@JorgeRodriguez-uy1mr The lines are pre-charged with refrigerant. No vacuum pump needed. I'm a universal certified HVAC technician.
Glad you got that unit off the exterior wall and onto concrete blocks. My condenser sends a weird vibration through the house when it is running.
Mines sounds like a car is running outside lol
Currently one of my favorite build series on CZcams. Thanks for all the hard work putting it together!
Thanks for watching!
â@@craftedworkshopwhat happen when your tubing are not long enough can you add another to one to extend the leght . May you needd to add more refiregentant in the line ??
You may have oversized the indoor units the system may short cycle and to get the moisture out of the air.
Fantastic video, Johnny! Loving this series!
I actually forgot to watch last week's episode, but it turned out just fine since I got to watch 2 episodes in a row today! :D
Same thing happened to me! đ
Hah, lucky you!
Me three
I am very impressed. I love how you explain everything in detail and the care you do for all your work. Great work ethic.
Thank you very much!
I was just about to order this same unit. Thank you for the great video. I wasn't to worried about it but it is so useful to see it done first.
You did one heck of a job explaining everything. I believe I can now install my unit. Ty sir.
8:54 Leak test should be done after the refrigerant is released into the lineset.
Don't the DIY lines come precharged? Since the fitting are the puncture style, wouldn't tightening the fittings together release the refrigerant in the lines?
@@lvlikeyV pre vacuumed not pre charged
The lines are pre charged. From mr cool. â25 ft. precharged line set, can be easily installed by the homeowner. No special equipment, training, or tools are required to install thanks to the pre-charged quick connect DIY line set.â
Impressed with the drywall tools.
Five years ago I installed mini-splits in my existing home, but half the interior walls are concrete block and half are lath and plaster. I did the refrigerant lines differently, connecting them outside the wall and tucking them inside the unit. The so called "communication wire" in mine has a full 220 Volts and I was not comfortable leaving what is basically an extension cord open to rodents to eat. So instead I used metal conduit and #14 wire. The lineset was too short on one so I had to braze some more copper on it. Of course last weekend the controller board crapped out so I guess it is going to be a pile of scrap metal soon.
The detail on this series is awesome. I look forward to every video
Thanks Cullen!
The more I see these, the more I want one. Nice job on the install! Thanks for sharing!
How did you check the line sets for leaks before you had pressure on the system? Not sure I would want compression refrigerant fittings in a wall without access.
I was thinking the same thing...
Also, if you didn't vac the lines, you'll end up with a small amount of moisture in them which "they say" can degrade the life of the compressor.
Or did I miss something?
@@NobukiPhu you don't vac the lines.
@@NobukiPhu Not they say. It WILL create acid in the oil of the compressor and create a burnout.
@@NobukiPhu The lines are already prepared, internally dry, and are of a set length from the factory. No vac necessary. It is a unique part of the DIY series from the company Mr. Cool. Downside is the set length.
I have installed two of these in my home. The lines are not pressurized the compressor is. If you fail to pull a vacuum on the lines you will have moisture in the system.
Glad you got it sorted out, I am really enjoying the build!
Two notes from our own Mr.Cool install for people considering trying it ( we put in two of these multi-head systems in our place)
1. Use a torque wrench when making connections and torque to the values specified in the manual. I cannot over stress how hellish it is to try and isolate a leak when you have between 8 and 16 connections on a full unit. Just....do it properly the first time.
2. Be super careful with any type of expansion foam around the lineset. If you are going to use it, make sure it has room to expand and isn't between the lineset and a stationary surface. It can expand and crimp the drain line, causing all kind of water damage and worse in an in-wall application like this. The only bonus is if that happens, you'll know pretty quick đ
Good tips!
Just don't use vinyl drainline. Run the vinyl into 3/4" pvc. The pvc won't clog as often
Very helpful video. I would really like to see how to insulate and weatherize the hole from the inside unit, especially when mounted on an exterior wall.
Nice job looks good can't wait to see more videos on this great project. Keep up the great craftsmanship and hard work my friend. Keep making. God bless.
These have been awesome, Johnny, hoping you get to interior trim work before I do mine
I love that you're getting so much use out of that giga mondo holesaw
Been using it a ton!
I never saw this before! I will consider it for my garage. I wonder if there is a way to access the drain line from the top in case you need to blow it out or our bleach down there to kill mold. Well done! Thanks for sharing this one!
Very well documented video.đ
Looking good!! Getting exciting now, looks more like a house XD
Just finished my multi zone install this was super useful!!! đ„đ„
Nice dude, glad I could help!
How loud is the outdoor unit?
How long are the lines?
@@lakesidecollision4763 you can get 16 ft or 25 ft lengths
@@nickmpower not bad at all, canât really hear it inside even before insulation is installed.
These mini splits are awesome. I have 2!
11:30 đ€Łđ€Łđ€Ł i was thinking it, but Johnny beat me to it
Great video everything was explained perfectly. Donât criticize this guy because you canât comprehend what youâre seeing.
What type of insulation is used in the ceiling? I just installed my Senville units this week in my garage. It's also18000 BTU.
Nice job đđŸ
Thanks for this video. How do you determine the length of the line sets? Also, how large is the compressor? I understand you need to have the right ration between square footage and BTU capacity. How do I figure that out?
Thank you for the video, detailed and answered all questions, just one left, if im living in New Jersey and temperature drops pretty low, is this mini split system would be working while temperature drops to 0?
Good job. You made it look easy.
I hope that we get an idea of the floor plan set up and see each room as it evolves. I would possibly like to purchase these plans if they are something I like and want to build.
Thank you, that was extremely helpful! đ
First thing you never bury flared or especially puncture fittings inside the walls that is a huge risk you need to learn how to rough in your line sets and then hang your indoor units specially after construction is done you never install completely the inside units during construction
There is a reason good hvac companies charge what they do . WE know what weâre doing
Iâm wondering how he is leak testing the unit without pressure in the linesđ€ maybe Iâm missing something
@@albertbootle6854 I wondered the same thing
@@albertbootle6854 i was also wondering. đ
There's no pressure on the lines how can you test for leaks
@@jackdickson2095
These are cheap pre charged line sets with puncture fittings . Again would never suggest putting mechanical fitting buried in the walls not good practice .
Also ! , donât buy mr cool units you will find out thereâs no local support from any hvac dealer .
Is there a reason you did not mud, sand, and paint before hanging?
What do those smaller bedroom units run? That would be perfect for my small shop.
How can you check for leaks before you open the refrigerant valve? Itâs like checking for water leaks with the water off
According to some of the other comments, those line sets donât end up with refrigerant in them. Maybe we should watch a Mr cool video. Must get to the bottom of this mystery!
This is a mrcool dyi unit which has refrigerant in their lines. They connect and then that opens them up.
Very informative! Thanks!
Amazing install dude! Well done.
Thanks!
Question... I realize this is a few months old but, I am looking at these for my new woodworking shop and was wondering if you have had any issues running these in a shop environment? I'm concerned about how often filters will need cleaning and if there will be problem with the drain line clogging or any other issues that I need to be aware of that a dusty environment might cause. Thanks.
Excellent video thank you!
Take a sip every time he says, "go ahead". Just kidding. Thanks for sharing. It's interesting to see these types of units become more popular in North America.
First time I saw these were in a bed/breakfast in Sicily years ago. They had them on proximity sensors so when you entered the room they would kick on, and turn off after a few minutes when exiting. I was amazed at how well they worked, took literally a few minutes to get the the desired temp. Theyâve since blown up here in the US.
You look professional. Great work
Where did you get the sound pads for the connections & insulation for the whole piping?
Great video! Thanks!
Glad you liked it!
How did you test for leaks? Used compressed nitrogen to a certain pressure? How did you evacuate all air and moisture from all line sets before introducing refrigerant?
The newest version (the one I have) has prefilled lines with quick connect that dont require purge (from what I understand)
The lines are zero loss fittings, and come Pre-charged. He tested with soapy water as demoed on the video
Being a person who likes things streamlined I get the process of running as much as possible out of sight...
Being a person who has to fix the stuff that breaks in my house I wouldâve run the lines up the outside of the house - through PVC pipe inside (as a conduit, inside the walls) and used industry standard covers outside... that way you have access to service the lines. And access hatches at all mechanical joints, because.....
Fantastic work, dude! The house is going to be ready before you realize it! đ
About the AC, it's better overkill than sweating inside! đŹ
Anyway, stay safe there with your family! đđ
If you go too overkill, youâll end up cycling the unit constantly and cause early degradation. Key for him is the units seemed designed to cool where needed,. If he tried to use all 36k btu at once to heat or cool, heâs probably about 2X what he needs. Realistically the 18k unit alone would be plenty.
your work is awesome. huge fan.
Great video. Thank you.
QUESTION: did you have to run the communication cable through its own conduit?
Thanks for this! I have my 18k waiting to be installed in the garage shop before these 100 degree months hit us here in Las Vegas lol. Just waiting on the HOA to approve it.
Nice, thatâll be nice!
Nice video. I have two questions: one is about checking leaks, do you open the valve a few seconds to check leaks? if no leaks then open fully open valves, right? The other is about the master valve, you mentioned it was not recorded. But where is the master valve located? Thank you.
I'm confused. When you connected the lines, you checked them for leaks by spraying on the soap solution. Later, when the lines were connected to the compressor unit outside, you opened valves and charged the lines with refrigerant, again checking for leaks. What was in the lines after hook up that would have created a pressure differential to check for leaks as the lines hadn't been charged with refrigerant until later?
Wondering the same thing. How did he check for leaks in the first couple checks?
And didnât Vac the system..
â@@keithrogers3241 you don't need to. This is the DIY system
Watch the video, the line sets come precharged.
If you see bubbles get bigger with air then there's a leak
We found out the hard way, fire foam is not to code as fire block. You need fire block caulking. This product expands when burned so it continues to pluck the gap as material burns away.
We started a 2hour burn wall and luckily were told early on in the build of our mistakes. Had to dig out all of the foam around rafters and floor joists and replace with caulk.
Thanks for the video.
Did you ever do a video on the Sensibo Air? Iâm installing a 2-zone mini split in a couple weeks and bring a HomeKit user Iâm also considering Sensibo Air coupled with Lutron Caseta occupancy sensors.
Perfect placement of TWSS
Interesting system Johnny. Just wondering what the pricing is on each of those units? The only draw back that I see is having to deal with potential multiple system breakdowns down the road.
Looking at about $2,500 for this system. Generally, my mini split units have been rock solid except when I forget to clean the filters in the shop, which can clog the drain line.
How did you check for leaks before you opened the charging screw? Are the lines under pressure before allowing refrigerant to flow into the line sets?
This is what Im wondering....it doesn't make any sense lol, and usually you gotta vacum them out too.
@@chrisleslie1988 as long as these have been out on the market, I'm surprised people still ask this question. The lines are pre charged with refrigerant. No need to pull a vacuum. Mr. Cool has made them that way for years, and they run great.
@@gp37128 It depends on which units the Mr Cool is. It looks like these are the quick connectors which would be pre pressurized lines. I'm installing the Pioneer system in my house right now.
Can you add drain pan tabs or is there an easy way to clean the drain from the mini split's air handler side if and when the drain clogges with debris? Another words can it be flushed or vacuumed even for preventative means? Thanks. Good looking system.
Nicely done sir
Question. Is it OK to mount the outside unit on the roof if a custom mounting bracket is made?
Finally next episode!
Thank you very much .. for how you explain very impressed
Great video thank you!!! You talk about mold growth and didn't use MR sheetrock
How do you determine which wall you mount the mini split on and how do you calculate what size of mini split you should get for your room?
1 ton is 12000 btu and is recommended for up to 400sqft. Other factors to consider , building material, how much sun exposure and heat loss. Its best to consult a hvac professional for heat load/ loss calculations. Good luck
I replaced an old HVAC unit in a park model mobile home in the Palm Springs area, it reduced my electric usage by 30%.
Will these mini splits cool down a restroom or a closet also?
How far can you go from the condenser to the inside unit?? Do they sale extension copper lines?
So you did not need a tubing bender to make the 90 from the unit down the stud wall ? Great vid by the way,nice clear explanations. Thanks
Nice set up .
Wow, this is very informative
what size breaker and wire did you use for your outside unit. and you only needed one disconnect box for this entire unit ??
Can the lines be shortened? Or are the actual lines filled with refrigerant? Thanks for the great video.
The lines are pre charged
So how long are the lines provided? I'm wanting to do two head units. One will be right next to the outside unit (shouldn't be an issue) but the other will be about 50ft away.
Hey Johnny,
How those Jaybird Tarah Pro are for you? How is your experience with ear protection? I love the excellent sound quality so I ordered them to give a try.
Loved you're video tyâ€â
Mini-split Kung fu...
Stud guards... đââïž
Nice job, nice video. Thanks.
So please explain what the soapy water test on the inside connection of the line set accomplishes when the lines are not under pressure.
All Line-sets and units are pre-charged. So everything is pressurized from the factory.
@@zacharywhite8230 Not true. Compressor is pre-charged with enough refrigerant for 25 feet...The line sets are not pressurized. If they were, you would still break the vacuum while terminating to the condenser and evaporator. You would still want to charge the system with nitrogen, leak test, then vacuum down the system whilst removing the nitrogen charge. Then while there is still a vacuum, you would release the refrigerant all while keeping an eye on the gauges to ensure you are within maker plate specs. They (Mr.Cool) does call these 'DIY', but if you read the manual, it also states that a professional who is licensed to deal with refrigerant should perform the final turn-up.
@@uswcboy then they need to quit leading people on about having Line sets ready to go.
@@uswcboy this is a mrcool dyi unit. Their linesets have refrigerant in them.
@@zacharywhite8230 If you tube is the source of information, or being lead, then they will continue to lead. If you research the items and look at the facts, no one is being lead anywhere.
Getting ready to install multiple zones like you did. Was just wondering was there any issue with pipe sweating or mold?
It's been all good so far, rock solid since I installed them.
Question on your workshop unit, do you do anything special to prevent excess saw dust going into filters? Not sure if thatâs damaging or not.
HVAC guy here. This is what I would tell him: You need to do 3 things: 1- supplemental air filtration in the room near where you're working to collect as much as possible, box fan and disposable air filter cube is great. 2- clean the filters in the unit much more frequently to collect dust that got past the supplemental. 3- brush out the coils on the unit and flush the drain much more frequently to get the dust that got past the regular filters and keep it from turning in to sludge/clogging the drains.
Does the drain line just terminate in the dirt, or did you have to put extra thought into that? Not sure how much condensate something like this produces.
I have been using ductless mini splits for more than a decade and they typically last 10 years. It is best to have the system set up in a way that you can completely replace everything every 10 years. Routing the line sets behind the dry wall is a recipe for disaster unless you are ok with completely replacing the drywall along with the AC. Just my two cents. Great video.
If I have three units, can the temp be controlled independently or do they all have to be set to heat or cold?
@@Kat-pr7qc If you have a situation where you have three units in three rooms and each has hugely different temperature requirements, for example one needs to be heated while the other needs to be cooled at the same time, then you should get three heads with three separate compressors. On the other hand, if you want to cool three rooms and they all run at similar temperatures then go with a single multi zone compressor and three heads.
Wondering if the lines could be snaked back in using the shop vac method in one of the first videos?
Why replace the lines just connect the new components.
haha very nice job until the almost end. can you braze the line set extend them longer. the outdoor unit need to be high off the ground for winter heat pump.
Great Video!
I'm surprised that not many people know of the Zamna Climate mini split AC and heat pumps that are DIY just the same as Mr Cool units. It would be really cool if you could get one of these units for the house.
They are solar ready meaning they run off direct power from solar panels - NO SOLAR INVERTER NEEDED. However, they do accept connections from the grid, so you can call them hybrids.
I'm actually running a few of these in Jamaica đŻđČ right now. The 12000btu runs off 3 solar panels and the 18000btu works with 5-6 panels (405W).
The company that makes and sells them are based in the United States - Zamna Solutions | Zamna Climate. If you should reach out to them just let them know Rayon from Jamaica đŻđČ sent you the info âđŒ.
just curious how you checked for pressure leaks at the connection points in the wall without the lines being connected and charged to the condenser according the steps in the video?
same question
I would assume the line set, since it pre-charged, May have shearers on each end.
How can you test for leaks on the initial lines before they're connected to the compressor?
Very nice!
Nice install of the split AC and great house build so far! The connectors on the copper lines look like they have valves in them to keep the refrigerant in?
The lines are pre-charged. Please look at this specific unit, so many people are making misinformed comments.
This is WAY too late by now, but make sure that the drainage line has a continuous downward slope. If there is ANY place where there is incline that will block the water from draining and then the indoor unit will drip. Trust me, it's a well-known issue here in Israel...
I suspect those lines will gunk up a bit over time, and now theyâre in hard-to-access locations...
If you were late, this is ancient đ. Thanks, that's useful information.
Iâd have an access panel for all the refrigeration line connections lol and how did you check for leaks before you let the refrigerant in the lines ?
The lines are pre-charged.
Pretty nice
Great video Justin Gaethje!
We love our mini split, 3 rooms.