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

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

Building Performance Workshop’s Corbett Lunsford, with expert help from Uplifting Air’s Brad Lemley, installs and commissions a 1/2 ton Mitsubishi ductless mini-split heat pump on the #TinyLab for the Proof Is Possible Tour. Come see us in 20 cities across the US at: http://ProofisPossible.com

132,341
Like
Save


Comments

Nuke Censorship says:

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

KevFlaAVCHD says:

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.

Oleksandr Shatrov says:

Good explanation! But, you'd better to set 4-10 solar panels on your roof and have 500 -1000 watt for 250-500 watt electro convecter, for example "Ensto", or something like that. No mosture at all.

Jeff Scanlan says:

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.

Matt Kime says:

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

On_The Road says:

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?

rschandran says:

Was looking at various mini-split installation videos and this is by far the best one from both the "Best/Right Practices" as well as a ton of good practical explanation of system, installation process as well all the things that can go wrong and why. Better than some of the books I read on this subject. BTW, I am an engineer myself so appreciate every second of this how-to video. Rama

Andrew Sands says:

DIY in Asia home owners have been installing Mini splits for decades. 2 good videos:
https://www.youtube.com/watch?v=ILo5UfFnbzk
https://www.youtube.com/watch?v=PvygZQF6v84&t=159s

Dylan Reischling says:

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

ihatecrackhead says:

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

Vee Lu says:

What a stupid, useless piece. A total waist of time. A lot of talk and showing the two good looking people. It was supposed to be about "testing". I shows only a gauge, a hose and the beautiful AC unit. The connections can't be seen. Nothing technical said. Nothing to learn. Don't watch, is a waist of time

Myrna Casillan says:

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

Caleb Ayres says:

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

That YouTubeChannel says:

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.

Chris Jarram says:

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?

Juice Willis says:

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

Vee Lu says:

A lot of empty talk. Not much of substance

Write a comment