How To Weigh Refrigerant Charge: HVAC 101

HVAC equipment operates on a precisely measured refrigerant charge. However, too much or too little refrigerant prevents equipment from working and possibly causes damage. Jon Fruetel and Bryan Reese explain how to weigh refrigerants to ensure proper charge and operation.
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[@shannonedwards1872]

Thank you for taking the time to explain how we do this. I write proposals that include going through this process all the time. It's great to see it in action!

[@JohnnyLivesAgain]

You give the home owners a step by step how your installers are dealing with refrigerant? . It should be known the company would handle this correctly.

[@davidgieswein6657]

Lots of good information here. What a great video.

[@michaelronneseth801]

It would be great to cover the same procedure for mini splits. I have yet to see a single video explain whether you can/should fill the machine (weighing it in) with it off to get close to the proper weight or turn it on and crack it 1000 times to get to the right pressure. The latter seems ridiculous but it is the only method I've seen suggested. Mini splits are so different, it deserves a separate video.

[@michaelronneseth801]

@@MechanicalPros given what I found online, I transferred until it equalized with it off, then energized it and let it slowly transfer in, heating the bottle with hot water occasionally to help move it along until I weighed in the exact amount. There is very little guidance from the manufacturer available on a complete refill which I find odd because there's only one right way to dot this. Most I see are pulling the heads back into the unit but that's not going to tell you how much volume you have. I see far too many professionals still trying to do this by using temp/pressure guages and given these are variable speed compressors, this is just the wrong way to properly install them. Hopefully you can add this video to your channel.

[@l.crossjr]

Great teaching skills. Is it necessary or I should ask, when is it recommended to remove valve cores?

[@MrNate7125]

There is suction side on a holding tank. If you broke your recovery machine pumping refrigerant back into the system. It’s because you were pumping liquid. This guy knows the process and it would seem that he doesn’t actually know the science.