I Installed A Heat Pump In My Garage! (MRCOOL DIY Mini Split 3rd Gen)

I'd never installed a Mini Split air conditioner and heater before, but I did it and you can too! I'll show you how to safely and professionally set up a MRCOOL DIY 18000 BTU (3rd Generation) yourself and save thousands!

***CORRECTION!*** I mistakenly said the refrigerant lines should be vertical and not laid horizontally. The instructions unfortunately were confusing and I missed the line about laying them horizontally, and many of their illustrations show them vertical. Even Mr. Cool's own install video show the lines coiled vertically. Apologies for the confusion! An upgrade I plan on in the not too distant future is getting these lines cut to size to avoid the coil at all, and to clean up the look.

Products and Tools Used In The Video (paid links):
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Chapters:
0:00 Intro
2:04 Mounting Indoor Unit
3:55 Drilling Hole In Wall
5:43 Mounting Indoor Unit
6:40 Connecting Refrigerant Lines
7:51 Securing Outdoor Unit
9:10 Electrical Overview
9:55 Wrapping Up Install

#airconditioner #heatpump #mrcool #airconditioning #jasonexplainsthings

[joseg]

FYI, you checked the line set on the top section with soap and water, but you must have the refrigeration in the line to see if you have a leak, do this once you have the refrigerant in the lines in order to check for leaks, other than that, you did great. Thank you for posting

[keenanwalker]

Make sure you always drill hole and angle downwards the drain needs pitch otherwise your units drain on will fill up and drip down inside of your wall. Very important

[ccek]

These are great diy units and it looks like people made some small recommendations to ensure your drain worked and there were no leaks. But anyone reading this please put your heat pump on a stand so if you have leftover pipe you can put it horizontally underneath. Having the role stand up that way vertically behind the unit causes areas for the oil that is added to the gas to collect. After some time this can be a cause of issues that include your compressor breaking down.

[imkindofabigdeal]

Just an FYI. We installed the non-DIY. Much much cheaper. All you need to do is nitrogen purge/vacuum the lines after hookup. The freon (410a) is already pre-loaded in the compressor. Our A/C guy did the last step for us - about 20 minutes of work. Our garage workshop is now awesome.

[kevinc]

You can tell he didn't really read the directions. Lineset from inside unit should have been taped with condensate tube at the bottom. Hole through wall should have been drilled at slight downward angle. Not supposed to button up lines until you connect to the condenser and open the refrigerant valves. Only then does checking for leaks do anything. I have installed the same system, and this weekend I will be finishing up a second install (18k dual zone).

You CAN disconnect the lines as long as you first shut both refrigerant valves on the condenser. I know, because I had to replace my gen 3 18k condenser (under warranty).

[galenledbetter]

Welcome to the MRCOOL family! Your tutorial and install looks great. I also installed the 18K unit in my garage and shortly became the envy of my hood. With that said, I must share some info a few HVAC friends offered me. It was strongly suggested to me to not leave any excessive amount of the line set coiled during operation. This can create an improper oil trap on the suction line that will restrict proper flow to the condenser/compressor. Happy Cooling...

[jauken]

Oh man! I love that Rainier beer sign. My folks have had the same one hanging in their dining room since I was a kid.

[pcngo]

Great EVERYTHING! Clear and straightforward how-to with great editing and sound. I LOVE the quick but not annoying Instagram plug too!

[jmoe]

Great presentation, you've got a knack for making videos.

[heathercoffman]

Thank you I have been waiting for a few months to install mine as I am afraid of screwing it up you have helped me so much.

[johnhouli]

Hello the piece you we’re looking for is in the inside of the house.
The hole on inside is covered by the blower unit. Reverse the tube

[adamgusse]

I am going to ask a couple questions based on comments as well as a few myself. Any and all input from anyone will be appreciated.
1. I see you and others say they are pre-charged. Which is great... but what is holding the charge? When you hook them up... is there a seal on the inside that breaks when you tighten down the fitting(s)? One person below said it comes pre-charged with nitrogen. ??? If the unit is 410A where does the nitrogen go??? I dont think nitrogen would be the charge. That is usually used for pressure testing. It seems to me it would be pre-charged with 410A. But my main point/question is.... I am trying to determine how and why it is not really necessary to pull a vacuum. If there is no valve(s) on either end of the line sets.... like the cond unit itself.... what is holding the charge? Both on the line sets and the inside unit as well?
2. Has anyone pulled an amp draw on these to see exactly how many amps it pulls at peak start up as well when running? It would be nice to know.

[markrouse]

Third gen does not have charged lines so it is best to check for leaks only after opening the freon lines with the allen wrench.

[Sjrick]

I only wish my exterior wall was this easy to drill thru, I have concrete blocks and lathe on top of that. Its a nightmare

[mhaggerty]

Use wood screws to mount the plate to the studs, not deck screws, but good video.

[narags]

That's funny to spray soft & water on the 1st valve to test if there's a leak without running the refrigerant in it? 😂 Anyway nice video tutorial.

[halligan]

“Let’s move on to electrical!” “Okay so not showing electrical.”

Lmao Good straight forward video though.

[ride-it-outtimandtoni]

Check your copper line sets that white ISO POLAR insulation is causing an acidic climate when wet that creates pin holes in the copper. I pulled out a run and put up a video of it leaking through little pin holes over a 15 ft span. Still have another 160 Ft to pull out and the suppliers and manufacturers are trying to hide the failure and pass costs on to you.

[samuelrobertson]

Was hoping we were talking about the compressor being in the garage

[kyndred]

you did help me make my choice, thank you