This is the best explanation I have come across on RU-vid on adding refrigerant to a central AC system. Thank you. I am a retired electrical engineer; I designed radio & TV stations, microwave links, and performed human exposure to radio frequency energy safety studies. As an engineer I like to understand other systems, so have been watching RU-vid HVAC videos. It's given me a better understanding of my home's HVAC system, and what the tech is doing during annual check up visits.
I looked around for someone that posted the "inner workings" of the AC gauges/manifold valve. This visualization is EXACTLY what I was looking-for. Pictures are truly worth a thousand words. The "logic" for proper usage is now thoroughly ingrained in my brain! A Big Thank You goes out to you!!
The BEST, there is no one of, just the BEST video about the gauge use in RU-vid!!! Thanks man! I thought the valve is for connecting to the gauge but actually it controls the connection between suction and charging! If I understand this then everything is understood! Other videos barely mentions this. You got to admit that very FEW people know how to teach!!!
This is really great. I am EPA certified but it has been several years since I worked on HVAC so this has been a great refresher course for me. Thank you so very much!
You make things very clear to me. I am a special education teacher looking for a degree in HVAC. You are a genius in your presentation. Keep up the great work.
Oh man the most Helpful video regarding the AC system of course for beginners I was searching online everywhere for this video I couldn’t find anybody else explained it Like that specially for people learning through vision so thank you very much very much for this This video for every person interesting Or home owners Please make more video in the future at the same simplistic way to understand Thank you so much
You have the best videos and do an excellent job explaining things! The graphics are very helpful. I appreciate you taking the time to share your knowledge!
Thank you, such clear & easy to understand teaching. I've been an electrical engineer for 30 years & am now going to train as a refrigeration engineer. I will check out if you have any other videos.
nice video I was always doing install work and was never taught service in detail they always had a different guy come in that mainly did service but good to see videos break things down simply and help ppl start to understand the proper ways as I'm going into the direction to open my own business so I been attending youtube college lol but Na I had a great Co worker he us like a teacher to me taught me alot of stuff thankful for him for doing that
Purge air in the service line of the manifold at the refrigerant jug after purging at the manifold on the liquid and suction line. Make sure you have the red or liquid line CLOSED and suction line open at the manifold open prior to purging the service port or yellow line. Aside from the purging of the service line, this is an excellent instruction for charging.
With blended refrigerants, like R410a, you must charge upside down (with liquid). You should have a metering device inline with your charging hoses so you don't flood the compressor. With R22 you should charge right side up.
Refrigerant 410A is so close to being a true azeotrpe it's not necessary to charge it only like as a liquid. Most guys use it almost the same as R22. The refer just does not fractionate (fractionize) like other blends.
Hence the need for a metering device is not needed. I use it mostly in liquid and I have no problem meeting with my manifold gauge. I think that's the way it is with most guys. I taught for 15 years and I understand the dilemma of presenting curriculum material and balancing it out with practical application.
Thanks Ron have Great Knowledge & an are Great instructor .Indeed Thank you so very very much ..for i have learned so much from you already & I do study HVAC almost ever single day .on bleeding hoses iv been doing HVAC /R for 26 + years but when i hook up to an system I always Now bleed thu the charging hose by cracking then close the low side usually 1 st then then the hi side gauge handles & let the air & a small tad of gas or liquid escape thu the end on the center / yellow or charging hose that way iam sure the gauge body & the hoses or entire system & setup are all bled
Thank u Mr.Ron for your clear and great explanation. Just a question with keeping the discharge side of the manifold closed,How do i proceed to check the discharge pressure?
Very well explained, I only have one question though. Would you not turn your refrigerant drum upside down? or leave it valve side up? in other words valve side down or up? Only reason I ask is b/c I seen a service tech turning one upside down once and didn't really understand why he was doing that.
radcon821 Good question, you have to charge blended refrigerants in the liquid state (upside down drum). Shoot me an email at hvactrainingsolutions@gmail.com and I'll explain more. It is too long for a RU-vid reply.
This is a mandatory educational video for anyone working on any AC refrigeration work and especially Parker and Sons technicians, in Phoenix AZ who do not purge air and directly connect compound gauges and contaminate ac systems and sabotage the life expectancy of customers expensive AC systems
Great job, of explaining how it should be done properly, I had a new set of gauges and didn’t have 100% clear explanation on which way my lines should be hooked up? my AC gauge lines has a 45° curve in the fitting and the other ends are straight, and on the yellow line on 1 end it does not have a valve in it, wasn’t sure if it should go towards the gauge or away from the gauge? Thanks
Thank you for this video, I am new to this business and just want to recharge my AC. I just purchased the manifold gauge and noticed that it has two inputs to the flexible houses for each color, yellow, blue, and green. These extra inputs are located just behind the bottom inputs. Do you know the purpose of these? Also, there is some air left inside of the manifold gauge in case I use your purging technique, do you think it will be easier to purge the system from the red and blue housed into the yellow line before e it is connected to the refrigerant bottle? In this case, the valves need to be opened.
if you will use an adapter between the vacuum pump and refrigerant tank or can, you can avoid purging the yellow hose during the charging process. doing so will insure 100% vacuum of the unit that is being charge with refrigerant. you can buy this adapter from amazon or make one. it is like a y or t setup where you can close the line to the vacuum pump after you reached the correct vacuum reading. also by doing so it avoid wasting refrigerant and releasing it to atmosphere. i suggest all hvac, refrigeration, and appliance repair technicians should use this type of adapter setup. i have read something that even r134a refrigernat is not safe to the ozone layer of the earth atmosphere.
thank you for the nice explanation..and the regulation prohibit deliberate release of refrigerants to the atmosphere.. Should they be collected to a separate receiver when purging ?
Question: I thought before charging a system you have to pull a vacuum first. If this is the case, how does bleeding the lines help? It seems like any air in the lines would be pulled directly into the system as soon as they were connected...
Great video, If I wanted to just check pressure without connecting the yellow hose and using a cap on the port, what is the best method to bleed the air out between the high/low ports before sweeping the gauge set back into the system?
Ron these videos have been very helpful...i had a question about the purge...can i purge when the compressor is turned ON...or does that make things worse cause it will start to suck in more air from outside ?
Nick Wall Hi Nick, you can hook up your gauges and purge running or not. Even though it is called the suction side, there is still pressure 70 to 130 psi depending on the refrigerant (R-22 or R-410A) so you don't have to worry about sucking in air.
Yeah great video. Now, 5/2017, my ac guy is using 427a. Some quick fixers will put it on top of 22. I think it might be worth just doing a conversion replacing the 22. Have you the latest, simplest method for this? Your thoughts. Thanks, subscribing....
nice demonstration. if you are connecting a gauge set to a domestic refrigerator would you not end up with half the charge in your hoses ? how can you avoid this ?
So how would you purge the yellow charge/vacuum line if you only wanted to check the system pressures without adding refrigerant? I am trying to figure out about the air in the yellow line when the refrigerant is transferred from the manifold back into the system. I dont want to suck the air in the charge line into the system with the refrigerant. Thx
When you purge the hoses at setup,do you loosen the connecting flared fitting AFTER you hook the hoses up or BEFORE and then tighten them after you get that second or two of purging gush? Thanks!
Can I hook up my gauges , open the bottle then untwist the valves up at the body until I get refrigerant, or is is necessary to crack them a little first. The reason I am asking is because the unit I am working on has king valves so I have to front seat the valves.
Does it matter whether you first connect your lines with the system off and once they are connected you turn on the unit to purge the lines or should the unit be running when you connect the lines and then proceed to purge the lines?
I didn't see you purge the new refrigerant and what happens if there air in the hose when your adding refrigerant? And what are the other fittings on the manifold for they are no open are they?
I have some questions. Virgin refrigerant cylinders contain only one port. What comes out of that port? Vapor or Liquid? Or is it uniquely mixed? Does it depend on the type of refrigerant? If you are charging by vapor, it shouldn't really matter which side you connect to, correct? I've charged recycled refrigerant by vapor through the hide side plenty of times. Never had an issue...but I do want to learn more. He states that high side pressure will always be higher than cylinder pressure. However, if you are going for a full charge, shouldn't the system but under no pressure, if not a vacuum? Assuming you pulled your system into a vacuum that is. Another thing I am used to doing is charging by use of recovery machine.
2:38 purging hoses. Would it be ok / better to leave the loose connections nearest to the condensing unit instead, and purge by opening the valve of the jug? This should be able to purge the manifold too, instead of just the hoses.
