Thank you :)

Thanks I'm glad it help. I have a compressor troubleshooting guide on my channel that might help with your valve plate question God bless

Thanks for the comment This is an excellent observation :)

I'm glad To help thank you for the encouragement :)

Thank you for the Comment. I appreciate the suction filter tip! :) That's not something I have encountered yet.

"Residential hvac doesn't teach you anything about this, lol." - really? I only do resi and am following 90% of the stuff he is saying, although I do watch a lot of light-commercial vids from Chris.

Thanks man ! I don't really give out my exact location I'm paranoid that my videos will get taken down 😅. But i'm in the new england area.

Thankyou !

I made the video so long ago I can't remember if I went into it. But you are correct, it ended up also being a meat Cooler t x v pouring into the system.

Yes ! :)

When you check your superheat at the rack you're checking for the compressors not the case. In theory if you're super heat is in range at the case you shouldn't have a problem at the rack. But the reason why you check superheat at the rack is so compressors will not drink liquid refrigerant it has to heat up to a certain point before it hits your compressors. I have a video on D superheaters and I go into like the temperature range that compressors can deal with if you're interested. Hope that helps

Thanks I’ve never really gotten into compressor superheat yet as you said I usually start working on the txv air flow epr valve for flood back I will check out the video as well But when you don’t have access at the evaporator suction to check superheat How do you proceed

@@CouchDad09 Well its a little bit of guessing to be honest but this is what I would do. 1) manul on Refrigeration 2) manul on compressors - you turn on the compressors manually because you need to drive down the pressure below what the epr is sent to in order to see what the epr is set too. 3) you hook up your gauges on the case side of the EPR. 4) this will give you your pressure. Which will correspond to the starting temperature of your coil. ( well theoretical starting temperature) 5) leaving all the manual overrides in you go down to the case and take your temperature on the outlet of evap coil. The difference between your outlet temperature and your theoretical pressure temperature is your super heat. 6) I would also check with a AR gun and make sure that your coil is getting to your theoretical temperature. 7) I would go back to the rack make sure there is no flood back on that circuit. 8) takeout overrides I hope that helps

yes it does thanks. when I Replace a txv without a service port at the evaporator I install one . that's what I have been doing . also have set the txv to a factory setting and checking for flood back but I like your method .

Thankyou for your comment. I actually adress this around 20 minutes in the video:)

Have you came along a issue like this?

Yeah I've come up crossings like this. 1) Did you check the filter going into the oil regulator. There's a little tiny screen going into the oil regulator or I'd heard it called an oil float. Sometimes this screen gets clogged. 2) Is there flood back from somewhere. You did a lot of checking on the oil system which. Is great so if you've concluded that the oil system is OK then? Did you check if there was flood back that's washing out your compressor. 3) I would isolate the compressor. And see if the suction side of the compressor Slowly rises to discharge Pressure. If the compressor is isolated and slowly rises the discharge that usually means that the read valves are no good or that there is some type of slippage going on inside. This will cause the compressor to fill up a liquid and sometimes trip. Anyway that's the direction I would go with it I hope that helps. !!

Thanks that's a great idea !!

Yes I first turned it off. Then I turned it back on and checked again. Both times I checked the temperature of the suction line going into the rack.

Yes, You simply isolate the compressor from oil. Hook a line from the oil pump to another part of The suction header. Over another compressor so when that compressor stages on it can return the oil back to the oil separator. You then manually stage the compressor on until oil is removed out of it. I hope that helps

@@gendronhvac-r1269 yes that did help so close don’t the oil control feeding line to that compressor stage on compressor. Thank you sure would help I see some compressors with a lot of oil in sight glass.

Kind of, The problem with this oil issue is if that one compressor turns off. It will suck all the oil dry in the rack. It will pool in the compressor. Because it's off on an alarm. This will cause all the compressors to shut off during oil failure. That will then in turn cause the case will run warm. The suction group depends on all the compressors if Shuts off, it's not a big deal.The case could still be a temperature. It's when the one that shuts off causes problems for all the others. Hope that makes sense.

Is typically low temp compressors. Of a certain kind of refrigerant need them. It depends on the manufacturer. But From my experience low temp high glide refrigerants need headfansfor sure.

No they will run just fine with the oil they have inside the compressors. Eventually they will all lock out on oil failure and you just have to open everything up and reset them it's not a big deal. But if you wanted to shut down the rack that's fine also. Hope that helps :)

@@gendronhvac-r1269 yes sir thank you for that piece of info!! You’ve helped me tremendously in this trade 👍

I don't know, But most of the ones i work on are close to 20 years old.

No underneath the hot and gas differential valve is the hot gas header which is responsible for defrost for the system. Above the hot gas differential valve is the discharge that goes out to the condenser. I have a video called rack Refrigeration explained in 35 minutes it goes into more detail I don't know if you've watched that one. I hope this helps

@@gendronhvac-r1269 Yes, Thanks.

@@gendronhvac-r1269 kzfaq.info/get/bejne/fdqppbyi29yvcqc.html Yes, this answered my question about the Hot Gas Bypass Valve. (Been struggling with that one for a couple weeks, but yes, there it is, literally in the last minute.) Thanks. [This goes a long way to adding knowledge of pressure and direction in these systems (!). The experienced guys already know this, but newbies don't - they get lost in the rack room when pipes get pointed to and we literally don't know which end is "up". This goes a long way to clearing it all up. (I should play this one every session the way musicians play the scales.)]

Thankyou for the comment! I love when people share what they know it helps me and anyone watching learn. I have never heard of that. We're did you here that from the manufacturer or a fellow technician just wondering :)

@@gendronhvac-r1269 So after speaking to a senior tech, he said they used to do it back with the old Y8 valves on the older Hussmann racks. He even showed me a procedure list from the manufacturer on how to set that valve( I wish I could attach a picture ). However, after speaking to a sporlan rep, he advised me the new Y1236-C valves no longer need to do that older procedure because they all come factory set at a 17 pound differential and you can adjust from there. Sorry for the confusion, just wanted to clear that up. As long as there is a differential, that’s probably all that matters.

@@Reefertech Thanks!! I appreciate the time you took to research and post :) I will keep it in mind when I'm dealing with older rack. This is the kind of commitment I want on my channel. Don't be afraid to share what you know ! I have learned alot through comments like these.

Is is when the liquid refrigerant make it al the way back to the rack :) Hope that helps

🤣schrader I am probably not saying it right.

kzfaq.info/get/bejne/eqmpi6pnnsWbc6c.htmlsi=SgpMP-x-uVe-Z12F This is a video I have on negative super heat. it doesn't exist in a theoretical world. You are correct. It's technically impossible for a refrigerant Lose heat in a warmer environment. But I kept encountering this phenomena so I investigated it. You can encounter it due to refrigerant glide. If you have fled back. Your refrigerant can cause symptoms to make you believe that you have negative suprer heat. Also great catch. I definitely did not realize that in the moment of recording the video. :) Why don't you watch the other video if you have time and let me know if you agree with my conclusion on that one. I honestly love hearing What all you guys have to say. And I learn a lot every day from all of your comments!

I get this comment a lot. So typically what I target is 29.9 Which is below Five hundred micros. In this case my gauges were 30 Inches of vacuum. This is considered a perfect vacuum. I know that it is impossible to have A perfect vacuum. But as far as my gauges were concerned I think I satisfied 500 micron requirements.

Sadly they told me to close out the job that I did enough and that we had more important fish to fry so they never allowed me to get back

The liquid refrigerant carries away the oil out of the compressor while it's running. Hope that makes sense

@@gendronhvac-r1269 Ok, so, - an overfeeding TXV sends liquid Back to the compressor (slugging?) - and then that liquid picks up compressor oil and sends it out to the condenser? (I don't think I've got this right, but it's a start.)

@@hg2. Yes but more than likely it will never make it out to the condenser because the rack systems have a oil separator. So the oil will go out the discharged and more than likely to be fed back to the oil Reservoir. But because it will sense there's no oil in the compressor it will just shut the compressor off. The oil cannot feed to the compressor fast enough to compensate for how much oil it's losing because of the slugging

@@gendronhvac-r1269 Phew... "slugging as part of the diagnosis". Ok. Thanks. On to the next one....

No because if you use a crescent wrench it is very likely you will round off the service valve. I can try to be directions to specific in videos. But I adjust the valve in this video to the left to open to allow higher pressure

How are we supposed to count the rotations if we can't tell what direction he's turning in the first place? You speak from experience -- good for you. But Mr. Gendron makes videos to teach. And if you're trying to learn, "little" details like 'what direction?' are important.

When you have a blended refrigerant. You can actually get a negative super heat reading. You cannot actually do this.It does not actually exist because you cannot Lose heat in a warmer environment. But because of the blend of refrigerant is an average across the blend if you have extreme floodback. It will give you a negative super heat reading. I have a video on it if you're interested :) Because with four forty eight a most of the blend is actually well below negative twenty for that saturated section temperature. Hope this helps god bless

kzfaq.info/get/bejne/oaqjfbymx9PJl4k.html This video I made explains it OK.

Yeah I might have been better off using A micron Gauge. My gauges have a micron function So i've been putting off buying a new gauge. Because i've been trying to figure out how to convert my gauges over to microns. I might have to just bite the bullet and buy two sets of gauges. But a 29.9 Inch vacuum is five hundred microns. I pulled a thirty inch vacuum. This is a deeper vacuum Then required. Anyway I hope learn something from the video :)

I mean we're all in different places man. I wouldn't be so harsh on people just starting out. I mean maybe on day one you knew all this stuff. But most of the tecs I used to train had no idea about this stuff. Every master was once in an Apprentice.