This will FINALLY settle the Debate!

[@KeithMcFly]

The oil NAVAC recommends is based off of longevity of the oil. The industrial oil is meant more to take a beating and keep going. Its designed with manufacturing processing in mind, not originally intended for HVAC but it works!

[@jonnymac31]

You may consider getting flare adapters and using 1/2 inch hoses for recovery. Speed it up even more.

[@exlost245]

Thank you for sharing your experienced on the trade. saw a bunch of your videos, learnt a lot. Hope you can answer my question. My YLAA york chiller system 2(it has 2systems) wont run because of ATV SUCT PRESS. Have no idea how to troubleshot it. Hoping you can shed some light

[@sjefoekel6058]

Where did the liquid end up in the system? We add extra 3/8 ports to fill and vacuum.

[@yhokvlog2574]

Watching here I'm a HVAC technician also I miss this type off unit..

[@TheMinecraftACMan]

Yellow Jacket ball valves come in 3/8ths, they just don't sell them at supply houses.

[@HVACTIME]

I'll have to check that out.

[@heinrichhein2605]

ever though about using in addition a Molecular drag pump ?

[@southendcycleworks]

I have a whole toolbox full of ball valves in various sizes I've brazed flare fittings to. Get you a refrigerant sweat to sweat ball valve, drop a flare nut on and braze a pre flared then cut section of tubing on. It will hold vacuum and is rated for 600psi all it takes is a quick turn with an adjustable. I even have adapters made to go from say 3/4"JIC to 3/8 male flare. Works a treat and as you need them you can just add it to the collection when the job is done

[@HVACTIME]

Interesting idea but sounds like you need decent room for it to work?

[@southendcycleworks]

@@HVACTIME anything is possible with the right parts and a torch!

[@southendcycleworks]

@@HVACTIME if you have an apprentice it's also a good task to give making adapters when you don't have anything for them to do after lugging all your junk to the equipment lol

[@Brokentwobutton]

I like that o-ring design upgrade. Its so annoying to either not be sure of my seal, or to get boned trying to remove a core when I forget to hook up refr before I pull. When 3cc of atmosphere goes in, but it sits on 650 microns for 10 minutes....

[@coldfinger459sub0]

On your leaking valve stems when you’re cranking them in or cranking them out , they don’t hold vacuum because of the packing put silicone grease or dielectric grease in the old days when my dad was young back in the 1960s they would put Vaseline or dielectric grease on that stem and this would stop all vacuum leaks. That NAVAC four-cylinder recovery machine I ordered it and purchased it before they even first release them and have them in stock yet. The NAVAC four-cylinder recovery machine is in a league of its own I found the same thing with the NAVAC core remover tools it’s nice not having that O-ring squash and hold your Schrader core making it difficult to remove like the other companies.

[@HVACTIME]

How has the core tool held up for vacuum's for you?

[@coldfinger459sub0]

@@HVACTIME i’ve only used it six times now. So far so good.

[@tinymanthebeast]

17:36 flash tank ?

[@brianmillion-osborne6747]

Push pull is the way to go especially for recovery ! It helps get the liquid out without dropping the system pressure . It makes me feel better knowing you can’t freeze up no matter how long you run the push pull method.

[@HVACTIME]

The trouble with it is if you don't have low point like these York's. Always a draw back to everything if you look hard enough so I'm probably being to critical at this point.

[@jonathanmark7751]

Great video! I don't work on chillers so this was very informative. I was surprised you didn't need to pull a triple evac to get that low of micron level for a large system. For that Danfos valve that failed. Would you be able to see it restricting a lot of flow with a thermal imager? Or can you measure it with temperature probes?

[@sterlingarcher46]

Bloody Nora mate , I've never had this low microns and I almost always do an overnight vaccum ! On one hand I'm excited to see the potential, but on the other hand it makes me sad because I'm not expecting being able to get this type of equipment any time soon 😔 If only they would turn their eyes to the European Market at last !

[@Adcd57]

Hey mate, nice vid. Question for you, when you said the system was open for two weeks, did you have the oil side isolated?

[@HVACTIME]

No sadly. We will be monitoring the oil and system condition and change accordingly. We did add acid scavenger to the compressor.

[@Adcd57]

@@HVACTIME thanks for your honesty. Everyone has a different opinion on how long you can keep POE exposed to atmosphere

[@czechmate6916]

I will be looking forward to the next video. 👍👍

[@sterlingarcher46]

2 things that blow my mind with the recovery / charging : How fast it's going How you can use 1/4" hoses whilst I use 3/8 and I still struggle By the way Holden can I ask : Do you pull a vac on your recovery machine ( i do but I wonder if it doesn't hurt it ) or do you just purge ? And also , do you not use hoses with ball valves ? Cause if you unhook everything to finish the charge after the push pull , then you're loosing the gas that's inside the recovery unit and the hoses ? Thank you very much mate , brilliant video by the way 👍

[@HVACTIME]

I purge my recovery, never tried the vacuum thing. I usually use stubby ball valves but just didn't pull them out on this one.

[@ryanbrown7134]

I noticed that you turned on your micron gauges after starting your vacuum. I was taught to turn them on before hand to let them calibrate to atmospheric pressure. What’s your thoughts on that?

[@HVACTIME]

Instead of directly answering I will ask this. How do you turn them on to calibrate when they auto off during the vacuum?

[@ryanbrown7134]

@@HVACTIME I almost always install mine with a core removal tool so i can shut the ball valve when I take it off to calibrate. On the few instances where space doesn’t allow me to install a core removal tool, I have a short 1/4 inch hose with a ball valve on it.

[@ryanbrown7134]

@@HVACTIME I’ve always wondered if it’s worth going through the extra steps but it’s just how I was taught.

[@HVACTIME]

Trust your training but my short answer is modern gauges aren't affected and you wont have issues doing as I did. Ultimately I'm just a guy online and should be taken cautiously.

[@czechmate6916]

Ryan Brown I was told the same as you.

[@shanek923]

Have you done the charging experiment with the g5twin on video? I know you have talked about it and I'm sure it's similar to the navac bit curious... also with charging straight liquid like that cant have any core depressers correct?

[@HVACTIME]

I never had a multi compressor job side by side I could experiment like this with the G5twin. I definitely wanted to. The new recovery is so good I see myself switching full time. The vacuum is great but it may be my centrifugal pump and keep the TEZ8 as my everything else.

[@yellowzx7r]

What gantry is that? Looks pretty easy to get around

[@HVACTIME]

Not sure, we have had it a long time

[@SupremeRuleroftheWorld]

fun fact: that navac vaccum gauge is a cheap aliexpress rebadge.

[@Skam1la]

Originally VALUE VMV-1, there is few Navac tool that is rebadged Value. Value is not bad at all, we are using Value tools more and more in Europe.

[@SupremeRuleroftheWorld]

@@Skam1la i am not sayign they are bad, just to temper expectations compared to YJ, refco or testo sensors and tools.

[@HVACChillin]

That Navac vacuum pump oil is expensive. I don’t see the value in going with a Navac pump, when it needs the special vacuum pump oil.

[@HVACTIME]

For the normal air cooled It doesn't really show its value as much as I am hoping to see on the centrifugal. I start that project Monday.

[@KeithMcFly]

The oil is designed to last longer. If you don't like changing the oil you can use the industrial oil.

[@zaccody6980]

How many tons is that chiller? That drier shell is a monster

[@HVACTIME]

400 ton chiller with 3 circuits.

[@zaccody6980]

@@HVACTIMEthat's insane, I work on chillers occasionally for 1 customer but never anything that big

[@cameronblades2394]

Your vacuum time is only as good as the the ports you’re pulling from. 12cfm pump hooked up to 1/4” -3/8” ports. You’re going to let it pull overnight anyway. No such thing as a perfect vacuum.

[@HVAC-prochiller]

👏👏👏

[@stephwaylonwells3218]

👍

[@Harry1s]

Watching you not loosing and tighten the packing nut when working that liq valve made my HVAC soul hurt!!! LOL Just wait until we have to switch to the new freons which will require special vacuum pumps and recovery machines. And you will not be able to leave them running without being in front of them. Oh and one more thing...the new freons will be flammable (much more than R410) which will require massive amounts of nitrogen to blow out of the circuits before soldering can take place. Annndddd our vans will need to have sectioned off areas for the tanks and exhaust fans installed. Joy joy joy!!

[@HVACRTECH-83]

You're way off man, first, let's start by using proper terminology. It's called refrigerant not freon. If you're in the trade you should know the difference. Yes the next refrigerants being developed are going to be slightly flammable and will require some extra precaution and some different practices in general but your acetylene torch on your truck is more flammable than the new refrigerant will be. You don't need a special compartment and exhaust fan on your truck to store it. They will be classified as A2L refrigerants and are only mildly flammable in fact class 3 refrigerants which already exist are much more flammable and have been around forever. Propane is a refrigerant. Much more dangerous.

[@Harry1s]

@@HVACRTECH-83 Easy smarty pants. I don't need an education on the difference between freon and refrigerant. OMG. Trying to be the smartest guy in the room much? That's your opinion about the compartment in the truck, exh fans, etc. I work for one of the largest HVAC companies in the world and that will be their policy. You will only be able to carry a certain amount in the truck (I think it is 30lbs) and it can not get but so hot. I can't remember the temp right. Companies will handle these new properties and regs differently.

[@MrBdogg317]

Jb makes a core removal tool for 3/8’s It’s pricey but I’m not sure if it’s vacuum rated or not.