Refrigerant Pump Down: Step-by-Step Guide 

Same bro fuck going inside and dealing with thermostat.

Excellent!

Thanks bro

Glad it was helpful!

YES! That's why I am here! Thanks Tad! I just Love Learning A/C Systems. Liked, Subscribed, and a Member of your Training. So much to Know and do it right, and Safe!

Wow, thanks! your welcome 🙏

Excellent news brother. Thank you so much for watching

good tip for safety 👍

Thank you Jimmy Really appreciate you becoming a member Send me an email tadfuller1@gmail.com If you need any of my Guides If you need help with the project let me know

My pleasure!

I need that info for reverse pump down - Do you know? Or the procedure? Ppl think I’m crazy for even asking! But a long time ago in school I remember the instructor said it could be done but needed to be careful! He never showed us how tho!

@@tonywiggins8073 it’s done in heat mode. You close the small service valve, which will be liquid that was just condensed by the air handler. In heat mode the large line isn’t suction, it’s discharge, so you’ll need to put your gauge on the common suction tap, and close the large service valve when it gets as low as it’s going to get. It’s going to subcool and stack liquid refrigerant inside the air handler and trap it there when both service valves are closed. You don’t have a receiver or accumulator in the air handler so it’s only going to hold as much as the coil holds. You will still need to recover the rest to a recovery cylinder. Will From being able to change the liquid line filter dryer unless it’s on the compressor side of the service valves. Best case, you’ll be able to “reverse pump down “about 60 to 70% of the refrigerant, at most. And, again, don’t even try it with a microchannel coil.

@@PeteGaughenbaugh1 Well I was close! 🤣🤣Just trying to figure out the procedure on my own & how the HP cycle worx! But I didn’t know about the micro channel problem )Good to know). So look like I’ll be recovering it bc it’s a Goodman micro channel ! 🤬. Thank you for the information! 👍😎

Learned this the hard way early on with another guy. We tried to pump down a york microchannel and it blew the compressor

thank you brother

Thank you my friend I appreciate you watching Please consider joining and becoming a member

Glad to hear that thank you so much please keep watching

yes and yes, and it's very simple to open the valves and turn the thermostat to cool

That's a good idea!

What the reason for your method?

The long winded racheting to close the Suction valve, ie pump down is reach just a few cranks and its closed, kill power done. On the other hand you perform pump down then start closing the Suction valve you'll be cranking for a while to close it. It's just a way I actually learned from HVAC GUY CURTIS I tried it and it worked well.

@@EREBO95 not a good idea. Some guys do it from sound but unless you’re replacing the whole cooling system I wouldn’t.

Good advice thank you

use a recovery machine

@@TaddyDigest Haha - I know how to do that, but I’m interested in how to do a reverse pump down! And how to do it properly! Knowledge is power & it’s always to learn new tricks and techniques! And you seem like the guy to go to! You really know your stuff! 👍 A Master at his craft! 👍👍

Awesome thank you so much for watching my friend Please consider joining level three members get access to all my members only videos about h v a c

Oooo ill have to check that out.

Thank you brother tom

yes

Usually no, it’ll take what it will take but most of the time the pressure wont go all the way to zero if there was an additional add of refrigerant. You’ll have to recover the rest.

I will do a video on that for you

Totally possible you already have a Experience

yes they do

Glad you enjoyed it

You definitely need a vacuum it down You need to put nitrogen in it first and then vacuum it down

Go check out a couple more on my videos. The most recent will show you how I pull a vacuum

Thank you

@@BillyN31 compressors dont like this being done. It went into bypass, all you can do is recover the rest. I usually go ahead time the suction valve being closed exactly when the compressor pumps down to zero. The linger it runs while sitting at zero the worse it is for the compressor.

@@royrollins8987 I pump down systems all the time. No issues

no sir

@@TaddyDigest serious question, just high side open?

That's impossible If you hold down the contact or it can't shut the contact or off

@@TaddyDigest ah ok so with those style compressors with integrated LPS you can’t pump them down?

This was a scroll compressor

@@TaddyDigest You risk damaging a scroll compressor when doing this....

410A

I was told u can’t pump down 410, bc of the scroll compressor & the high pressures

So you're telling me that a refrigeration system is an open loop instead of a closed loop system That's what you're insinuating I don't understand

> this means just a tiny bit of vapor that you end up releasing in the air when you open up the system. I can see the logic of what you suggest, but the practice is likely an offence contrary to 40 CFR § 82.154 and 42 USC 7671g(c)(1), with criminal penalties as prescribed by 42 USC §7413(c)(1). Something similar applies in the EU, UK, Canada and, I gather, even China and India.

@@StrixTechnicaright on point. I know someone who didn’t know any better and got arrested for releasing into air

You can run into a negative vacuum for a couple minutes and you won't burn your compressor or windings, it's actually best practice to do so when you pump down into the high side (around +/- - 2PSIG, what he did in that regard was correct. Yes he probably didn't purge the line and some non condensables got mixed in, BUT if you find the highest point in your system and relief valve it, you can purge all non condensables, as that is not illegal to do at least according to the EPA as long as it is either a safe gas to release or in very small amounts just as if you were to connect to a valve with gauges.

​@@StrixTechnicaI don't know about other countries but in America a small or neglibile amount of vapor release is not a punishable offense, although the EPA is not clear about what a small amount is there are conditions and scenarios that are allowed and in this case it would also be allowed

Tell me what the indoor fan does

Am I missing something You think the indoor fan has something to do with the refrigerant pumping into the Outdoor unit

@@TaddyDigest Yes sorry. So you need some heat load into the refrigerant to be sure it all boils off. This is just a 99.9% guarantee you get it all. You're method is... I'd say 90% guarantee. Just playing it safe.

Got it thank you for clarifying my friend

@@TaddyDigest No problem. Great channel.

yea I have come across this could be because the coil is micro channel or long line sets