Julian Creech – How to Pull a Vacuum on an HVAC System

HVAC Technical Academy
Sanford, Florida
May–June Session

Hi, I’m Julian here with Second Chance University and I’m going to be showing you guys how to pull a vacuum on a system.

Basically, anytime you open up a system or do a major change to the system is when you want to do a vacuum because you don’t want any excess debris or non-condensables flowing throughout your system.

So, first things first, you want to make sure your manifold is on.

And you’re going to hook up your low-side hose right here to your suction line, which is your low side of the system.

And then you’re going to hook up your high side to your liquid line, which is your high side of the system.

Then, right here, you’re going to take your vacuum hose and you’re going to basically hook that up to your vacuum here.

You want to open this up to allow for the excess air to escape from the hose so you’re only pulling from the actual system.

So, first things first, you’re going to turn on your vacuum and make sure that the oil down here is clear and not a milky white because that will mess with the actual suction of the vacuum.

And basically, you’re going to turn on your vacuum and make sure that it gets down to 500 microns because that is the EPA regulation standard.

Thank you very much.

Very good.

So that hose there, do they have to be snug or what happens?

Yes. I like to make sure all of my ports are snug so you don’t have any leakage through any of the other holes.

Make sure these are snug as well.

I typically like to turn the hose with it. When you turn it, it makes it easier to make it tight and snug as well.

So, yep. It’s all good.

Thank you so much.

Sounds good to me. That’s awesome. Thank you, sir.

No problem. Anytime.