Chiller Shaft Seal Repair on York YK Centrifugal
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- Опубликовано: 7 дек 2021
- Had a fun shaft seal replacement on this York YK Centrifugal chiller. It had a major oil leak due to seal failing. This chiller has had this for some time, a couple years ago they had the motor replaced due to bearings. That is where the bulk of the seal damage came from.
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With the ammonia compressors I service, we usually go by drip rate. They have weep catch bottles like the one in this video, so during our PMs, services, and follow ups, it’s good practice to note the level of oil in the catch bottles. If a weep catch is full, we empty it and check drip rate. I’ve had weep catch bottles stay the same level for a year, and I’ve had some overflow within a week! I like the fact that this seal comes preassembled. Not typical with the compressors I’m messing with. Also, one thing that is important to note: LOTO your motor when you service anything shaft related. If you’re doing and alignment, if your swapping a shaft seal, or even inspecting it, putting your hands on it, LOCK OUT THAT MOTOR 🤙
I am HVAC supervisor in Qatar highly appreciate your videos
First, the keepers are only to keep the seal aligned. It doesn’t keep it from flying apart. And it’s 750ml per 14 days. The YK seal is one of the easiest there is to change. And it doesn’t hurt a yk to turn it the other way by hand. Far more advanced than the LTD style compressor
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Lol I was about to say all the same things and thought "this guy must work for JCI", and then I saw the name 🤣.
Policy has changed! It now is based off of run hours, not days any longer. 750ml in 112 hours is the specifications for replacement.
Damn, looks like York engineers actually thought about the people who have to service the equipment down the road. I work on a lot of different equipment, nothing HVAC, but usually servicing is the last thing engineers think about. That seal assembly is easy to get to, has the jacking bolt holes, plenty of room to work. Usually shit is buried, can't see it, impossible to get a wrench on it, but in this case the total opposite! Would be nice if everything was designed with service in mind.
that klein adjustable should be in every toolbag-widemouth is super versatile....good job on the repair
Awesome content and team direction.
Good tip always get in the habit of using guide pins for removal and installation. Helps everything come off / install straight and properly spaced off shaft
You’re a damn good hand man.
Great video brotha. Much appreciated.
Yep, York has come along way since old seal and O rings. Amsetting up the seal on, specially machined sheet of glass to verify how flat it really was. York alwsys said that they were true, but our machine shop found several that were way out from the factory.
I wanna hear that this all went well on your next sit down bro. Good work.
Pressure test was spot on today!
I just came here to say nice shaft
Cool video!
Excellent 👏👍✌🙏 Thx for sharing ...
Nice video, Make more. Do one on recovery / push and pull
nice job
Moly Kote!!!!! Best name ever.
Great video no one is going this in depth into chillers. Great work. When I went to York tear down course they said chillers aren’t charged to nameplate. They are field charged to discharge superheat.
What course did you go to?
@@SombraLocs It was at Johnson controls YT/YK tear down/panel course. Pretty Good course, my co worker went to Entech and he said it was very good as well.
The class in new freedom PA is great!
@@HVACTIME that’s exactly where it’s at. They do a lot of R & D for specialty chillers. Wish we could of got to see that part of the plant.
@@HVACChillin I used to work at this facility. The west York plant before that was built was even more impressive. Unfortunately that department has dumbed everything down and they treat their techs like trash. Been in the field (local 520) since I left and definitely not looking back
Very cool, it would be nice to work under you just to learn, great stuff 🙏🏼💯
Love this channe!!
Thnx man for this am going to change it for first time soon so any advices
One of the plants we take care of has 6 of them. Only done one so far.
What did you pressure test at? Did it hold? Shaft seals are known for leaking, however ive never pressure tested a brand new one, do they actually hold? Or do you account for a certain leakage? I have a YT the shaft seal was leaking really bad at 5psi, i unfortunately dont do run inspections so im unable to log oil loss.
Thanks, love your videos!!!!
Didn’t see you replace the C ring
Out of curiosity is it easy to get a replacement for that O ring and do they give you a part number for it ?
The stuff I work on it's a noght are to get the replacements because there is no part number , no size no info no nothing about them O rings .
How often does the charge on these open-drive chillers need to be topped off?
What was the troubleshooting steps for this repair?
So the std is the difference between the refrigerant temp and tbe chilled water leaving the systen? Example chilled water leaving at 42 and refrigerant temp of 40 would be a std or approach of 2 degrees. The york chillers we run calculate it this way. The carrier one does not. It will be a difference of 2 yet if you scroll through the menue to the std it will show a number mch higher.
What do you set the pressure regulator for the shaft seal at? I always set it at barely positive???
Do have the exact parts list needed to replace the shaft seal . My local York supply house has a bunch of idiots and lazy personal at it
Honestly, I've not seen a shaft seal that thick. The ones I've done is flush with the forward thrust cover
Hey mate, may I ask if how to discharge capacitor bank of yk vsd? I suspect resistor bleeder has issue but we cannot dig further as dc volts still quite high at A and B point of vsd. Thanks
Yes there are bleed resistors. If its not discharging capacitor bank then need to replace those.
@@HVACTIME thanks mate..
Apa kah .york type 12VV F masi pruksi karna saya ada kendala di mecanical seal...shaf...
What style is that yk? I havent seen a steak like that yet.
Is that a loop pump bearing assembly growling in the background?
No turbine exhaust fan
@@HVACTIME I guessed that or VFD … lol. Good work with your guys letting them get hands on. Stay safe
It's supposed to be replaced when it fills the catch cup twice a month per YORK.
Sir you from where ?
What is the tonnage of this machine?
400 ton
Good job excellent ,I always change 0 ring only inside mechanical seal ,not needs to change complet mechanical seal.
Catch bottle is 750 ml. If the leak rate exceeds a full bottle every two weeks the seal should be replaced
That is factory spec but for customers with low to no redundancy I recommend if they fill it in a month then its time. Properly working one should go years with minimal leakage.
😆 🤣
You sound like me, on a soap box when I think someone should know something.
You only know what your taught and what you retain.
😆
Stay safe.
Retired (werk'n)keyboard super tech. Wear your safety glasses!
Do you have any literature on how to do this job?
I do but my company doesnt have me share it. Very expensive to get.
If you’d like I have the literature I can send you if you need it I would need you’re email though
@@robertmorales1409 if you're willing to share I'd like a copy
@@southendcycleworks what are working on and where are located?
@@southendcycleworks you*
Hi sir how are
250 ml if it fill it after 14 days (working days)
York says 750 ml in 14 days
yeah some people gotta learn that some parts are single use. when that part is serviced, just replace the damn o-rings... they seat and swell. why sweat so much on a leak when you can just replace the seal. smh
750ml every 2 weeks if it was taking 4-6 weeks to fill bottle then you did a uneeded repair
Ya that 2 week mark is when its critical. Id rather fix it before then when they have no redundancy.
750 mil in 14 days
Hack