HVAC 149 Vacuum p16 Example 4 Standard manifold

The slowest and least accurate method pulling a vacuum, also the most commonly uses with standard manifold gauges and 1/4" hoses

In this example I have placed the Vacuum/Micron gauge at the pump as it is seen often. However I also have a vacuum gauge/Micron gauge at the evaporator coil. This will show how inaccurate a micron gauge at the pump is.

With method I also demonstrate the difficulty of keeping the hose clean from the vacuum pump to the refrigerant tank.

[ES-ivwb]

Your vacuum series, is absolutely amazing 😍

[samersarah]

Thank you Mr.Ty in the length of refrigerant lines in every 1 foot should have to add 2 oz? Thanks. 🌹

[SK-qcof]

In the title, you indicate p16 example 4 standard manifold. Is that referencing a text book? If so, can you name it and can I get a copy? Thanks

[andyh]

Why use Nitrogen prior to vacuuming it out?

[dustinweber]

When you are paid by the job core tools pay for themselves the first time

[cameron]

I hope you don't get paid to teach HVAC you can't even pull a vaccum right. You NEVER put your micron guage on your pump. A vaccum pump produces 20 microns of deep vaccum to allow it to pull down to 500 microns or below. You want to place your micron guage at the furthest point so you know that you pulled the entire system down to 500 or less microns. Get a T take out the core and put it on the suction or liquid side if you have to just DONT PUT IT ON YOUR VACCUM PUMP! All your doing is giving yourself a false reading and checking how deep your vaccum is at your vaccum Dosent make much sense does it 🤣 I'm a commercial hvac tech and they teach that in the apprenticeship class during your first year 🤣 ask any school even online ones or any commercial tech and they would laugh at you for putting it on your pump.