Britton and Jordan rough-in a one-way Mitsubishi ductless mini-split head and review some of the basics.
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All right today we're installing a nice mitsubishi, 12 000 btu one-way ceiling cassette, as you can see right here. What this will do is actually just recess nicely in the ceiling. So the first thing that we'll always do is make sure we have enough space in between the trusses, so this one actually requires at least 12 inches and 12 and 1 8 inch. So if we look right here, we've got plenty we're about 20 and a half there, so we're able to fit that in there.

The next step we usually do once we're making sure that it fits is going to finalize from the customer themselves on where they want. It so here we have the choice of more of the middle of the room itself or more in the middle of the wall here, so they actually chose the middle of the wall. So we're going to hide that, so the ceiling can set right up there for it, and once we get the spot nicely middle here. What i'll do then, is take the tape, measure and merit and measure for the all thread that will be coming down to support this unit.

So i'd measure from up here - and i end up with about 32 inches just to give myself some clearance to be able to raise and lower the unit. So the nice thing with these is the body of the unit itself will actually sit flush with the drywall. The cover will actually just go right into it and hold it in place for it all right. So the nice thing with the author, it is after you cut it best thing i always like to do is actually try to put a nut on it.

First, just to make sure that your cutting actually did not destroy the threads at all, and once i do that i'll actually put a nut higher, put one washer here and then i'll put a second washer on there just to slide the unit in between there. To give it nice support, so it won't really move or buckle, and it just slides right into here and those get tightened down and it'll stay nice and firm for it next part. What i'll do is i'll? Take these eye hooks right here and we'll actually install them on the trusses up there. So what i usually do is take a small hole drill a little bit and then just screw these right in to get them nice and tight up there.

So i've already got the mark off right here, where i need this one to go for the all thread. What i'll do is i'll raise it up there and once i get it nicely lined up. I can find where i need to put this at, and i drill a nice little small hole here and then i take my little hook here and i start screwing it in there. It's always a good thing to wear gloves, because roofing nails will get you all right next, we'll take the all thread and actually hang it through the hook.

We have right here so on one side of it. We have the washer right there and then we'll take our nut here and thread it onto it. So after you get all the four all threads up here, so we have a nice support for this, we'll actually take the unit and hang it up here, as you can tell, we have the unit up, we have it secured on the for all threads that are Up there hanging it securely next, we'll actually take the copper, we'll run it from the outside over here, where the unit will be out there run it up overhead right into that spot. There also the drain line will go there too.
So now we're prepping the copper to run. What we'll do is tape both the liquid and the suction line together here with also our communicating wire, which is a nice 14-4 here that has the black and white for the main power, the red for the communication and just the ground with it we'll just tape. It all nicely together now what we're doing is taking the copper and going up through the soffa here, where we already had a hole cut earlier today. So he'll just push that up there and then what i'll do is go inside and actually pull the copper through.

So here is the copper coming up right here: keep it above the trusses, as we can pretty much just go straight towards the unit all right. This is just the cover that actually goes over the drain line, hookup right here, along with your copper connections right there. So we remove that so we're able to get these off here, the nice large nuts that will actually hold the copper flares to the unit itself. We got our two copper lines here, so what i need to do is actually hand bend these, so they form a nice little.

U to actually come straight into the unit nice and neatly, and then next i'll end up taking these nuts right off here and then i'll actually put them right here on the copper for it, because you never want to forget those all right. So the next step is actually to make the flares on these so right here i have this nice clear, gun right here made by navic and since the copper we have from it is 3 8 and quarter. They have the nice little parts here that are just for 3, 8 and a quarter, and what you'll end up doing is just taking your copper. There slide it in there.

The nice thing is, it has a little stopper, so it'll keep you right at the point where you need it for a perfect flare each time, and so what i'll do is i'll? Take these here's. My nice quarter right here, i'll slide it right onto here and it'll stop and then i just put this down and it squeezes it and then it compresses right onto it, tighten that down, and then this just comes in here slides on there and you lock it Into place, then you go forward and you pull it right back. I take this nicely off and with a nice flare each time. So then that goes right in there and then it'll secure properly right here to the connectors here and we're good to go.

So the most most important part of this is whenever you're connecting these copper joints. They actually ask for a certain torque rating. So if you actually open the nice book right here, we have a quarter inch pipe diameter and 3 8 right there. So our foot pound is 10 to 13 and 25 to 30..

So you always want to make sure you have a torque wrench with you just so that you're able to get those to the right point, because it is extremely important. It will help your flares hold a lot better and honestly, it's a lot less pressure than you would actually think it would be now i'm actually going to prep these by taking some nylog and actually putting them on the threads of this to help seal this up. So usually, what i would do is actually a little less torque, so not quite to like the 13 on the quarter inch. What i'll end up doing more or less is probably around 11 just because the nylon does help seal it so much better, all right! So the first thing i want to do is actually scoop back the nut here and actually set the flare right onto the copper here, make sure it seeds nicely and then i'll manually actually screw on the nut here and then once it gets tight i'll actually take My torque wrench and set it down to do 11.1 and there we go correct, torque settings for it, so it'll be nice and happy.
So now we actually have our copper connected here. Biggest thing you always want to make sure. Is you slide down the insulation, because both these lines will condense and then the nice thing with these is actually comes with this piece right here for the drain line, there's just a tube right there, so you actually just slide this right on there and it fits Nice and snug and our drain will actually run the same way. The copper does so it actually bends with it, and then you just have to actually put all these little clasps back into place to make sure everything holds nice and neatly for you all right.

So once everything's attached, we take the cover plate right here and actually put it back over the copper and the drain line. It gives it a little bit of insulation in there, but not too worried because of a with our line installation. All the way up, like it says, should be no worry of any leakage or drippage all right. So next we're going to run our drain line, as you can tell it's following the same line as our copper here, so it's actually going to come out with our line set outside uh.

Most important part with these is to make sure they are insulated. It is actually on a downhill, but it's best to make sure everything is insulated, because you never want any leaks above someone's head and actually a build out like this. Then we just slide it on down. So now what i'll do is i'll actually take the pipe here put a little pvc glue on there, and this comes with a nice attachment, we'll slide right onto it, and i make sure that i have enough in there and then i also insulate that.

So it comes right back up. Our drain line is nicely insulated. All the way till it goes out the wall. All right right here is where our actual voltage comes in.

Our wires will go through. So it's just two little screws and there's our terminal block right. There it says, if you look closely enough, you have s1 s2, s3 uh, mitsubishi's and zoe goes s1 is always the black wire s2 is the white wire s3 is the red wire, and then you have your ground wire right there and then this little guy, just Slides right in here all right, so, as you can tell all the wires are nicely seated in their proper spots along the ground. Then we actually just put this plate right back on there and screw it back on to protect them.
Ta-Da you.

49 thoughts on “Installing a mitsubishi one-way ceiling cassette in an unfinished room (you can see everything!)”
  1. Avataaar/Circle Created with python_avatars Isaac Lebowitz says:

    Will this fit between 2×8 joists x 16” OC ? No TGI just regular wood joists ?

  2. Avataaar/Circle Created with python_avatars Stan Benton says:

    Since the room was already gutted why didn’t you run the line set down the inside of the wall? Had that been my house I would have happily paid a little more for you to drill thru the concrete instead of having to look at that line running down the exterior of the house.

  3. Avataaar/Circle Created with python_avatars Aryan says:

    Good Installation

  4. Avataaar/Circle Created with python_avatars jepito29 says:

    Here there there here here there

  5. Avataaar/Circle Created with python_avatars Rob Fleming says:

    Put the nut on the all-thread first. Then when you remove the nut, it will clean up the cut threads.

  6. Avataaar/Circle Created with python_avatars keenan walker says:

    I would have used side beam hangers for the threaded rod but whatever works I guess. Also the wire you used is 14-3 the ground doesn’t count as a wire.

  7. Avataaar/Circle Created with python_avatars J. Scott says:

    "Actually" a good video.

  8. Avataaar/Circle Created with python_avatars Mitsuman says:

    This is not at all how this should be done and certainly not a “quality” installation as some have commented. Lines and drain should all be strapped secure. No cement on the drain connection at the unit!? Ever read the install manual? “Be sure to connect the drain hose connecting part using adhesive of polyvinyl chloride family to prevent leakage”. Wow. The thing is swinging free and wobbling back and forth it’s an insult to craftsmanship. The unit should be installed solid on rigid rod, if you can’t figure out how to do that you shouldn’t be installing. This poor customer. Not to mention who’s going to tell the dry wallers the exact dimension of the opening so they don’t drywall up to the edges of the unit. Then the grill won’t fit on and the drywall will have to be cut back. If it’s to be under insulation (especially blown cellulose) there should be plastic barrier covering unit to protect from dust (again, read install instructions if you’re new to this). It’s much better to install lines, drain and wiring in position, then cut the unit in after drywall is painted. Way cleaner and the customers unit isn’t exposed to all the construction dust. Units can easily be removed from below, they’re designed to be installed into finished ceiling. Yes this equipment lasts very well if it’s applied and installed correctly…which this unit is absolutely not. This is not at all how this should be done.

  9. Avataaar/Circle Created with python_avatars William Craig says:

    These units are great till they stop working. Then the shit show starts. Remember products don’t last anymore.

  10. Avataaar/Circle Created with python_avatars Steve Flynn says:

    Nicely done. Does the drain line need to have pitch when it follows the line set? Service area Nepean??

  11. Avataaar/Circle Created with python_avatars Ductless Plus www.ductlessplus.com says:

    No you need 14.5” inches not 12” Are you in Kanata ?

  12. Avataaar/Circle Created with python_avatars Chilling with Bike says:

    Nice work. And for 14 dislike, could please point out why you guy disliked?

  13. Avataaar/Circle Created with python_avatars D Mac says:

    How close to a Tv can you mount the inside unit? Mitsubishi says 3' Have you ever seen problems with this distance?

  14. Avataaar/Circle Created with python_avatars Timothy Fisher says:

    nice,nice,nice,nice,NICE!

  15. Avataaar/Circle Created with python_avatars Kent Wood says:

    Would always be nice to not skip steps…like putting the 2×4 on the other side to make up for truss width too wide for cassette…or did you. See, viewer left to make an assumption. Some degree of off angle is surely undesirable.

  16. Avataaar/Circle Created with python_avatars TheCablebill says:

    Does the drain line pitch up from the unit before it travels to the hole in the soffit? If so, would there be a problem with stagnant water during dormant periods? Are you in Orleans ?

  17. Avataaar/Circle Created with python_avatars Joseph Tramutola says:

    Don’t forget to Reem your pipe before you flare it

  18. Avataaar/Circle Created with python_avatars Ray Gamero says:

    You're a smart guy thanks for the video can you make a video about charging mini split units multi-zone ones thanks

  19. Avataaar/Circle Created with python_avatars Ray Gamero says:

    Thank you you are very helpful can you please do more HVAC videos of charging units Mini Splits Etc you're a smart guy thanks

  20. Avataaar/Circle Created with python_avatars wwefan2000geo says:

    How do you measure where to put the eye hooks Service area Orleans??

  21. Avataaar/Circle Created with python_avatars Jason Beaver says:

    Jesse from Breaking Bad gets a career in HVAC. Nice!

  22. Avataaar/Circle Created with python_avatars Brayden Murray says:

    I have knee walls in my attic bedroom. Can these be put on a wall instead of a ceiling?

  23. Avataaar/Circle Created with python_avatars Tony Abdalla says:

    I played the "actually" drinking came and I was trashed by minute 4…actually…

  24. Avataaar/Circle Created with python_avatars 786otto says:

    Looks great except those home depot hooks, Grainger has professional attachments for threaded rod. Are you in Ottawa ?

  25. Avataaar/Circle Created with python_avatars InHocSigno says:

    Loctite for the nuts and threaded rod, or double nut them? Seems they might come loose with vibration over time.

  26. Avataaar/Circle Created with python_avatars M. Lewizz says:

    the space above my ceiling are 12 in deep will this unit fit

  27. Avataaar/Circle Created with python_avatars Code Lyoko says:

    IPhone 11 Pro Service area Ottawa??

  28. Avataaar/Circle Created with python_avatars Mike Britt says:

    Nice video big guy.

  29. Avataaar/Circle Created with python_avatars Brian Curtain says:

    I thought it needed a communications cable. What type gauge wire is that for power?

  30. Avataaar/Circle Created with python_avatars Gaurav Harmale says:

    can we install cassette ac on 5 metre high ceiling

  31. Avataaar/Circle Created with python_avatars trfisher78 says:

    Actually, I actually learned something here actually…

  32. Avataaar/Circle Created with python_avatars Garry Bradley says:

    You sound like Pinkman from breaking bad.

  33. Avataaar/Circle Created with python_avatars Michael Aharoni says:

    very well made video. I am planning on installing Mitsubishi 5 stations using a branch box. Are you available for consultation Service area Kanata??

  34. Avataaar/Circle Created with python_avatars TJiNY TJiNY says:

    Excellent video..

  35. Avataaar/Circle Created with python_avatars Raj Varghese says:

    Good job if only you would have shown the outdoor compressor/condenser unit …..with Installing the indoor unit plate for final touches……….

  36. Avataaar/Circle Created with python_avatars RJ_Make says:

    Well Done Britton and Jordan! Thanks for the video.

  37. Avataaar/Circle Created with python_avatars Ramy says:

    Hey great video. Not sure if you’ve used these. There is a brand called Sammies. They make a screw that has a 3/8 threaded hole for the threaded rod. They are great to use in applications like that. They come in different styles. Again great video. It’s great to see people keeping care in the HVAC Industry.

    How do you like the Navac tool? Any cons to it?

  38. Avataaar/Circle Created with python_avatars kayboord says:

    Actually, that's a great job 😉

  39. Avataaar/Circle Created with python_avatars Chris HVAC says:

    Nice job! I wish our building code was as easy as yours is.
    We can't use tray cable outside so we use plastic coated MC
    We also have to strap up the cable, drain and lineset
    Then again you guys have all that hurricane code we don't have to deal with here

  40. Avataaar/Circle Created with python_avatars Fire Alert says:

    Nicely done
    but please turn down the music just a little.

  41. Avataaar/Circle Created with python_avatars ANTONIO RANGEL says:

    No isolators. Looks good

  42. Avataaar/Circle Created with python_avatars C Dubs says:

    Nylog is for the mating flares, not the threads

  43. Avataaar/Circle Created with python_avatars Brian Carlisi says:

    Nice job! You do better work than Bryan.

  44. Avataaar/Circle Created with python_avatars Kamen Petrov says:

    Nicely done very professional just one safety glasses Are you in Barrhaven ?

  45. Avataaar/Circle Created with python_avatars Chris Durham says:

    They make 90degree “sammies” for 3/8” all thread. It would look a little more professional. JMO

  46. Avataaar/Circle Created with python_avatars Jason Goertzen says:

    I hate to be this guy but how do you change this unit out or service it once it's hidden behind the sheetrock. Nice install though!

  47. Avataaar/Circle Created with python_avatars Mitchell Bailey says:

    Quick tip when doing all-thread, put a nut on both sides of the cut and then back the nut off of the cut ends. It will re-thread buggered ends every time.

  48. Avataaar/Circle Created with python_avatars HK HSM says:

    Nice job. Quality installation. Keep posting, I will be happy to see outside part installation.

  49. Avataaar/Circle Created with python_avatars Jeff B says:

    Nicely done

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