How To Wire Mini Split Outside

The boys are wiring up one of the heads for the 3-headed mini split system they are installing. You always want to install the highest capacity head on the a-lines.

⏱️⏱️Chapters⏱️⏱️
00:00 Intro
00:12 Outside at the unit
00:25 Lines for outside power
00:35 This is for the highest capacity head
01:00 1B, 2B, 3B will be the second highest capacity
01:10 How they wired each head
02:00 Vacuum pump, how many microns to vacuum to
02:25 After you get to pressure, let it sit for like 15 mins
02:45 You can't use an analog gauge, won't tell the microns accurately
03:05 Can get the gauge set on Amazon for like $100
03:25 You will need to vacuum each head down

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#WiringMiniSplit #Electrical #DIYInstall

Transcript:
All right, guys, we're out here. We already got the inside hooked up like we were talking about. So look here. There's these three right here. L1, L2 and ground. That will be your power that comes in from outside. Into the unit. 1A, 2A, 3A is what's going out to your first head. What should be the highest capacity you have? All these heads here are all the same capacity, so we don't have to worry about that.

So if you have one that’s say 12,000 BTU and these are all 9000, you're 12,000 would be your first head on your unit, which would be here and then your lessers would be there. So your max-, your highest capacity of your first one, the one B to be three B will be your second one, 1C, 2C, 3C will be a third one.

So in our case, 1B, 2B and 3B will be our kitchen. 1C, 2C and 3C will be the living room for us. And we're not using all three of these. Well, one of the how the L1, L2 and the ground are the power coming in. So and then your ground, it has a connector around cracker here you'll have to one of these grounds here and square and there and that's how you do it.

But before we go, this is our old vacuum pump from Harbor Freight, still kicking. up here. When we vacuum down, we vacuum on the 500 microns is what you want to do, which is 29, 30 to 30 negative inches of mercury, which is an AC into the mercury. This one tells us a percentage. It’s a digital manifold gauge. So we're only 22% for this and we need to be at 100, which will be 30 inches a mercury, -30 inches of mercury.

And then what you'll do is you let it sit for like 15 minutes after you do that and you'll see where it is drop, how much is drop? And if you have a big drop, you have a leak. The issue is you can't use the analog gages, you have to have a micron gauge or a digital gauge.

Otherwise you have to vacuum for a really long time and just hope you're getting it right. Because the analog gauges will not tell you what your micron is accurately so you can get a pretty well priced manifold gauge set, on Amazon or something like this one for 100 bucks and get it now. But we got to do that on all three of them one at a time.

So right now we're doing A. You don't open any of this all of this stays closed. While you vacuum. You don’t touch any of that. So, while we vacuum this down to 30 and 40 Mercury will move to the next one, but we'll come back to you guys to do that.

All right, guys, when you come in here, you set up your powder blast. Coming up, your L1, L2 and grounds, then you go to your ground. That should be it.