MRCOOL DIY Multi-Zone Mini Split | System Install | Ep 2

Install of the @MrcoolComfort ductless 4th Gen DIY® Multi-Zone Mini Split system. This 48k BTU 20.5 SEER unit can add up to 5 zones. We'll be installing 4 head units... 3 - 9K and 1-12k. We install the air handler heads, run the pre-shared line sets and make all the connections.

We'll cover the electrical, testing the system, and overview in the next video.

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0:00 Why MRCOOL?
1:59 Our Setup
2:59 Condensation
3:31 Heat Pump
4:36 Heads Install
16:23 Running Line Sets
21:36 Connecting Line Sets
26:40 Line Set Covers

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[nneelix]

When I installed my indoor unit, it was recommended that that the hole for the lineset and condensate drain be drilled at a slightly downward angle from the inside to the outside. This ensured that drain line would slope out of house and drain correctly without any blockage. Oddly the flange for the hole liner was perpendicular to liner so the flange would not lay flat against the wall. I ended up trimming some of the flange off the liner so it would wit a bit more 'flush'.

[locolorenzo]

This is looking real good Paul. Certainly doesn't look like a DIY job when it's all buttoned up. Very well engineered, and installed by a DIY professional. (if that's possible)😊

[Overpar]

Boy I'm really looking forward to installing a similar system in my storage garage! Everything is looking fantastic!!

[nneelix]

One of the nice things about these multi-head units is that your total head BTU can exceed your outdoor units BTU rating. In this case Paul has 9k+9k+9k+12k or 37k on a 48k (4 ton) condensor unit. He could still install another 12k or 18k head on that system and still be fine. You cant exceed the 48k supply from condenser, but it will just throttle down the heads when demand exceeds the condenser limit. But here is the thing, how often would you be running all five heads full tilt?

[alishatruman]

How much efficiency is gained by having the extra line set pancakes laying vertical vs. horizontal?

[williammiller]

you want your excess coils laying horizontally. Not vertically. Apparently refrigerant oil will separate and settle in the low spots of a vertical coil and reduce efficiency (or worse 🤷🏻‍♂️.. I just know not to do it)

[Mortimer_Duke]

Doesn’t placing the condensate line at the bottom of the connection set make it more susceptible to becoming pinched and flow restriction?

[langejdenny]

What size braker? Single 30amp maybe double 20amp.. i need to know if my box can handle the 48k

[fredericrike]

I have to agree on the "anybody should be able to do it" aspect; somewhere on that design team is a guy with lots of bashed thumbs and bruised fingers- the set up logic and way markers make it hard to not succeed. Additionally, as an owner a lot of simple home diagnostics will be much easier. They are also beginning to market some evaporator heads that are for installation in a ceiling pocket. Mitsubishi has rea;;y pulled out the stops on this concept- and beta tested it all over Asia over the last twenty years. From my POV as an HVAC tech, I would have preferred all the drains run to the outside on the dame side as the condenser; it's easier to routinely check if they are all working. In high humidity areas, it usually means putting in a dry well- a hole with rock in it to diffuse the water. There is an old technician's proverb to help you along; "It only has to work for you", and "If you guaranteed it, look at it one more time before you leave it.". For a DIY fella, you do pretty fine work Mr. Marshall! Best to Em and All!

[TechExplorer]

Can it be over sized? I think my contractor did because I wanted to make it 68 in the 98 degree heat. He did a 24k Mitsubishi in a 2 car attached garage.

[MR-xkku]

Is there an extra power/communication wire included with each lineset? How does an extra length of wire connect if it is too short? Is there a wiring harness, or do you need to splice it?

[Z-Bart]

How's work coming on 'Paul's Playpen'?

[MrSeadawg]

How did distance factor in to designing your system?
As far as were cooling heads would be to the condenser. And the electrical supply. Could you of run two seperate units and come out better as far as costs go?
Love watching your channel!
And when you set your simpson ties in concrete. Can the bottom of them actually make contact with the concrete or even be buried in the concrete some.
Thank you for all you do!!

[zbzpnvk]

I want to know what’s the monthly cost on this?

[Mortimer_Duke]

I don’t understand the trap for the condensate line(s) running to the canning kitchen.

[markbuchele]

Where you going to buy parts when these mr cool units need repaired?

[Billliamm]

You keep calling the compressor the condenser?

[CubanMofo]

My MrCool broke a bunch of times. I had to buy another system cause the company refused to send parts to fix it.
By the way that's not a DIY you just voided the warranty. They make It look DIY but it's not