Copeland Discus - Full Inspection & Teardown

[@jfs520]

Hey Trevor, ever since I’ve been studying about these semi hermetic Compressors, I’ve saved a few customers time and money just by taking a few extra minutes of taking apart the compressor. I really love and enjoy these videos. Please keep them coming.

[@RefrigerationMentor]

So happy to hear you are going that one step further for your customer. Keep up the great work

[@CHOMAHOMA]

Awesome video. Thank you. I feel that this video just scratches the surface. It means that there is still a ton of information that I need to put my hands on and read.

[@RefrigerationMentor]

That is a great way to put it. It just scratches the surface. It is all about putting the reps. Learn from different people and books. Keep Learning Chomahoma

[@CHOMAHOMA]

@@RefrigerationMentor Will do Trevor. Everyday.

[@josepalacios9505]

Well done thank you for sharing your knowledge

[@CHOMAHOMA]

Watched twice. More input incorporated. Thanks again Trevor

[@RefrigerationMentor]

Glad you enjoyed it

[@luish.8525]

very well. Thanks.👍

[@tukamushabadickson6811]

hello Mr Trevor thank you very much for this video too! I have advanced more in my skills about These semi-hermatic and scroll compressors I have been able to prevent liquid flood back avoid flood starts and avoid overheating many of my customer equipments had a lot of errors in their installations and because of you I am so happy of what am i becoming. thank you! Then could you have covered screw compressors too! could you be having the same video covering screw compressors the same way like in this video! screw compressors for chillers!

[@RefrigerationMentor]

It is great to hear that this channel is bringing you and your customers value. Share it with others who want to grow there knowledge. I have a Vilter Single Screw playlist that maybe of interest that I recorded with a good friend of mine here kzbin.info/aero/PLH6R3tp4lm-leRXcR8wrUGdvH2Hv8LFUp&si=08E267Yz8a_cRLJE if you are looking for compact screw I have not made those yet.

[@k.y22]

yes , really really great information. Thank a lot sir. Keep it up. Best regards

[@RefrigerationMentor]

Most welcome

[@prithwishdey6708]

Sir you discuss on screw compressor mechanical and refrigerant cycle (loading and unloading)

[@RefrigerationMentor]

That will be coming down the road.

[@toddswartz1836]

Excellent training tool

[@RefrigerationMentor]

Thanks for your support

[@babatunde6080]

Very good mentor, wish learn a lot more to you, thanks

[@RefrigerationMentor]

I am glad to hear. Share that knowledge with others.

[@Practicing_HVACR]

Would love to have some more info on the oil check valve and Venturi valve. I haven’t had much success finding anything detailed.

[@RefrigerationMentor]

You are in luck we have a few learning programs coming up if you are interested in learn a huge amount of knowledge on compressors in a short period of time. refrigerationmentor.com/upcoming-courses/

[@reftech1]

I learned a new concept today - Rotor Drag due to main bearing damage

[@RefrigerationMentor]

Yes it is very important to understand because it happens on Scrolls too.

[@fenflyer]

I love scroll compressors .......don't get liquid slug damage with a scroll 🤞

[@RefrigerationMentor]

For sure too much oil or liquid refrigerant will damage the compressor. More great content at www.refrigerationmentor.com

[@tukamushabadickson6811]

what brings about the compressor tripping oil differential! yet the oil level is okay from the sight glass

[@RefrigerationMentor]

You could have damaged cylinders and piston rings from overheat which is causing blow by. But it could be other things as well. Great question.

[@sureshkumar-ux2nq]

Would like to know when I change compressor what I should I see if same compressor and same manufacture not available, could u let me know please bro

[@RefrigerationMentor]

That is very hard to say. No every manufacture works the same as well as the quality of design is not the same.

[@Rin-bn9mj]

Hi Trevor, if discharge pressure and temperature both high in semi hermatic compressor is there possible the valve plate foulty?

[@RefrigerationMentor]

@@Rin-bn9mj it could be but it may not be. If you have valve plate issues like blow by for example your crankcase would warm up too. Think of anything on the high side that could cause high temp and pressure like Fans, coils, heat reclaim, check valves, service valves. Best thing to do is plot you diagnostic numbers on the compressor manufacturers performance and electrical curve charts of that compressor to see if it’s running near spec or not. Check the temp of the cylinders while running if they are close it’s probably something else. If one is 30 degrees higher then the others then I would isolate safely and look at the valve plate.

[@Rin-bn9mj]

Thanks a lot for your precious reply.

[@EBPization]

Awesome tear down vid! I have the copeland kagb-005E-Iaa-800 on a beverage air freezer. What would it mean if the compressor takes several tries by the start capacitor before it cranks over?

[@RefrigerationMentor]

I would look at the start components

[@ammarazzawi8213]

Does the oil pump work in two directions or one direction ?

[@RefrigerationMentor]

Great question. It can go in either direction.

[@hishammosa6977]

I have same compressor and I have problem low oil pressure and when I revrse the direction of rotation I get normal oil pressure, Is that normal?

[@sureshkumar-fp8bl]

Sir What type of bearing using in reciprocating compressor.

[@wanderlygomes6059]

Perfect !

[@RefrigerationMentor]

Thanks Wanderly

[@WWCONSTRUCTION2008]

Really great video. May tackle the next bad unit myself. If not, any places you recommend to have a rebuild done. Do you do that service. Thanks

[@RefrigerationMentor]

We do not do that service but there are many companies out there that do depending on your location.

[@randomrefrigeration4564]

How do you tell if the discharge puck is bad Will it be hard to push in easy to push in Thanks

[@RefrigerationMentor]

Should not be stuck or too hard to push.

[@muhammadikram4094]

Very Good work....... I m Refrigeration Technician... I Need job

[@RefrigerationMentor]

Best of luck

[@techti8792]

You got one for bitzer?

[@RefrigerationMentor]

Not at this time I do have a whole video on Frascold compressors which have some similar characteristics

[@boricuaarecibo9259]

Can the oil pick up tube be accessed with out taking off the bottom plate on a 4D compressor? I just liked/subscribed

[@RefrigerationMentor]

Great question. There is not an oil pickup tube in the 4D compressors it has ports drilled out in the casting to the oil pump. K body compressors have pickup tube and you can sometime get them out without taking the bottom plate off but you have to be careful not to break it.

[@rickrojas9564]

Always use a megger most efficient test

[@boricuaarecibo9259]

I have a customer who's 4D compressor has no oil pressure differential

[@RefrigerationMentor]

That could be from many things no oil, flood back or damaged pump.

[@MOISESTHAMER]

EXCUSEME, can i to translate your video to spanish? with credits ofcourse.

[@jfs520]

Quick question. What does it mean if my net oil pressure is above 60PSID?

[@RefrigerationMentor]

There is a spring inside the oil pump that will bypass the the oil.

[@jfs520]

@@RefrigerationMentor Thank you. What would cause high net oil pressure? I recently check the net oil pressure and my crankcase psi was 1 and my oil pump psi was 83 - 82PSID

[@AirsoftColeraine]

Great video. Trying to learn a little more about these. Going to look at one this week. I am getting it tripping on High oil pressure overnight. Any ideas what would be causing that? The compressor is actually low on oil although sight glass is very dirty and cant see for sure. Separator float may be jammed i suspect. Thanks

[@RefrigerationMentor]

What is the oil pump pressures and the crankcase pressure? When it trips?

[@RefrigerationMentor]

Intermittent oil warnings or a lockout is possibly a symptom of a plugged oil pickup screen. Symptoms of a plugged oil pickup screen is a return to higher oil pressure after the compressor starts again, followed by lowering oil pressure as the run time increases. If these symptoms are observed and other common causes of low oil pressure are ruled out (e.g. refrigerant dilution or low oil level), removal of the oil pickup screen to drain the sump and clean the screen will likely solve the problem. If the oil protection system is generating low oil pressure warnings or lockouts but the measured oil pressure is adequate…inspect the screen on the oil pressure sensor for debris.

[@AirsoftColeraine]

@@RefrigerationMentor Oil pump pressure 75psig and crankcase 15psig when at set temp of -12.. on the controller inside it reads “high oil pressure” on the history but I suspect it may mean low or high as it’s only one 1/4” transducer. I am going to replace it to eliminate it. Check oil screen as you say. I may replace the separator as it’s a sealed one as a precaution. It is on a Copeland semi running a bread retarder it trips at night intermittent. Thanks again

[@RefrigerationMentor]

@@AirsoftColeraine have you did a blow by test or looked inside the compressor yet? kzbin.info/www/bejne/j2XKnXh5bZmfbrc

[@AirsoftColeraine]

@@RefrigerationMentor got it repaired today, oil change, blow by ok, oil pick up screen very dirty and cleaned out, oil was very low when I got there, 700ml drained and 1400ml new in, it’s been working ok, they said they,ve only been using it through the day no overnight programs as it’s for retarding and proving bread. It tripped 2 early mornings previous displaying high oil pressure on the history, no way of checking back what the pressures were unfortunately. I’ll keep you posted you,ve been a great help .

[@mobster7459]

Do you have to drain the oil in order to clean the pickup screen while in the field? I am having low oil pressure issues on 6D compressor

[@RefrigerationMentor]

I have always pulled and changed the oil to check, usually the oil was dark in colour anyway but I have friends who isolate the compressor full close suction, discharge and oil line as well as electrical safe the compressor and they put a vac pump on the crankcase. While in a negative pressure they pull it out quickly to check the screen than pull the compressor into a deep vacuum to get out any moisture. I have not tried this myself personally.

[@mustafadudde]

👌

[@brelservicesbrelbaz3436]

bonjours c'est très bien mais si tu peux nous faire les vidéos en français sa sera super bien merci

[@kevinmitchell8126]

Il existe une fonction de traduction automatique dans les légendes.

[@tblock2123]

godbless

[@RefrigerationMentor]

I am glad you enjoyed it

[@traviskerr7439]

Football fans

[@PaulPassarelli]

audio & video are badly out of sync

[@RefrigerationMentor]

Thank you for notifying me. I had a few others check it and they said it seems good now.

[@TabbyY23]

Very well information Trevor 👏 🫡 kudos to your effort and time.

[@RefrigerationMentor]

Your welcome