Posted: 5/16/2017 6:11:23 PM EDT
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I'm building a 12x24 bedroom addition on the house and I'm looking at putting in one of these ductless split wall mount AC units.
Unfortunately(or fortunately  ) I have been buying a lot of guns recently and the $1000 for one of these systems won't be in the budget
For a few months  .
What are the chances I can buy just the install kit to run everything through the wall before I close up the wall so I can just buy The indoor and outdoor units later and connect them for a cleaner install? Seems like it should just be a couple of copper pipes and maybe the 110v AC unit |
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Quoted:
I'm building a 12x24 bedroom addition on the house and I'm looking at putting in one of these ductless split wall mount AC units. Unfortunately(or fortunately ) I have been buying a lot of guns recently and the $1000 for one of these systems won't be in the budget
For a few months .
What are the chances I can buy just the install kit to run everything through the wall before I close up the wall so I can just buy The indoor and outdoor units later and connect them for a cleaner install? Seems like it should just be a couple of copper pipes and maybe the 110v AC unit You need to nitro purge and vacuum. It's not for DIY'ers just FYI. They are very fragile. |
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Quoted:
I should still be able to do 90% of the install and just have someone come out to do the refrigerant. I'll give you material that might help you out. 1.HVACR school podcast: there are two podcasts on ductless installs. 2. Some tips. -keep those lines closed off let nothing get inside of them. -A little anti-seize on the threads of the flared fittings will help insure a good fit. -Use torque wrenches to give the correct fit. -Do not over ream the flare fittings. Just as bad as under reaming them. -I like my Hilmore flare tool. Has a good depth gauge on it. -When doing the drain line it is crazy how often the flex drain to pvc somehow gets an upward pitch and causing drain problems like immediately. Make sure you give a downward pitch on your drain line right next to the unit. -If someone comes out tell them you need a nitrogen pressure test, an evacuation below 500 microns and then to open and correctly charge the system. |
| they are normally super easy to install. nitrogen purge/pressure test is mandatory as was stated above, 500 micron is gov mandated. Also every training course on mini splits has always said to use crimp on terminals on the electrical connections on the communicating wire. |
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Good advice so far. You will need a high quality flare tool- don't cheap out. Clutch type flare tool with eccentric flare. Make sure to properly deburr the tube before flaring and make sure it's cut square. Use a torque wrench and Nylog when you make the connection.
You will need to have properly sized lines for your unit. Probably most important - don't by a cheap unit! Stick with Mitsubishi or Daiken. I installed my Dual zone Mitsubishi about 3 years ago at the ranch. We love it. I had a pro come out and do the inspection, pump down, leak tests, and Puron release. He also signed off on the Mitsubishi warranty card. |
Getting ready to do a Reno on the house. Want to do a mini-split on the upstairs (retard builder made 2-story 2600sq/ft house on 1 A/C unit  )
What is my price range on this? Can I do it for around $3K? EDIT: I should mention there are 3 bedrooms upstairs and want to do all three rooms with a separate zone. |
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Are you planning on putting it on an Exterior wall? If so, do you care if the line set is run in one of the cover systems on the outside? If that's OK, the only thing you need to do now is run the 220V to where you want the outdoor unit.
If you are thinking about hiding the lines in the wall, that is a much bigger PITA. Depending on the size of the line, you might not even be able to make the bends in a std 2x4 wall. A 2ton unit uses a 5/8 and 3/8 tube. The 5/8 is a bitch to bend, even with a bender. I just moved mine and used a No-Kink hose to make one of the bends. No Kink. About $45/each on Amazon. Mini Splits use better insulation than typical line sets so make sure you order the correct set. Your also wasting money, because the set typically comes with 25ft of line. ETA: I have some left over communication wire. PM me if you need some. 15-20ft. |
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Home Depot also now offers this service (install) Is it worth going through them or just find a local HVAC installer who knows what they are doing? The AC guy that I arranged for my pump down and charge was the business owner. He said he would hire me anytime after inspecting it.  .
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