York Chiller Refrigeration Cycle - YCIV & YVAA AC

UPDATE: I made a mistake on my YVAA rundown. There is not a drain valve after the flash tank. It uses the "condenser drain valve" aka the feed valve only.
In this hvac training I explain the refrigeration cycle of a York chiller. YCIV & YVAA are great hvac system for any building air conditioner. This hvac training videos goal is to help hvac technician better understanding these AC systems.
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00:00 Intro
00:24 Visual Explanation
05:56 Main Panel Readings Explanation
09:38 YCIV Drawing Explanation
20:38 Evaporator Design Changes
22:38 YVAA Drawing Explanation
28:44 Closing & Tech Support

[@pinoyhvacrtech_australia]

Eductor part is wrong mate.. illustration should be 1 from liquid goes to eductor, 1 line from buttom of the barrel or evaporator and 1 line back to suction line.. this kind of oil management is almost the same of rtac unit. Oil from buttom barrel then back to compressor

[@HVACTIME]

Thank you, after I finished it and released it I realized I made a mistake on that part. What I will have to do is make a separate correction video doing a better job on that.

[@pinoyhvacrtech_australia]

@@HVACTIME yvaa has some changes depends on coil either copper coil or micro channel. Copper condenser coil the drain valve control by liquid level sensor at evaporator whereas with micro channel coil they dont have liquid level sensor at evaporator. I have few yvaa unit that i maintain here in the island

[@HVACTIME]

All of mine have micro channel.

[@brianwolf9860]

Economizer opens based on comp frequency. Our YVAA now does not have check valves in the econ pipe, because our newer software allows for Economizer backflow control.

[@pinoyhvacrtech_australia]

@FILIPINO WONDER'S yvaa sir?

[@rudrapratapsingh367]

after watching this video, my basic dx chiller cycle clear , thanks a lot HVAC time

[@HVACTIME]

I made a mistake on my YVAA rundown. There is not a drain valve after the flash tank. It uses the "condenser drain valve" aka the feed valve only.

[@Drak7282]

I was going crazy looking for that thing lol. Glad I came to comments

[@HVACTIME]

Lol my bad

[@EA91HVAC]

You posted this at a perfect time for me ! I just finished going over a few yvaa’s with my journeyman this past couple days. Love the videos keep it up!

[@jasonjohnsonHVAC]

I hope to one day understand and be proficient at troubleshooting equipment like this. This type of equipment is what i get up and get going for. I love this trade

[@stlbrian33]

Thank you for these videos. HVAC Gold.

[@perryjeff77]

Bro thank you so much man. I just got a job as a facilities engineer and this stuff is hard for me to fully grasp. Thank you for breaking this down.

[@wata_laf]

Love the video! Everything was perfectly explained but I would like to add, there is not a “DRAIN VALVE” on the flash tank leaving line to evap. Now there is a shut off but not an eev device.

[@lauderdalechad]

Ran into a yciv today for the first time. I'm used to working on rack refrigeration, needless to say I was all kinds of turned around. This video made it all so clear to me now. I'll be working on it again later this week... Atleast I'm armed with some knowledge now. Thanks a ton! 🍻

[@simohvac9222]

great explanation

[@ramitbajrawar]

Very useful information

[@hvacr3519]

very useful information, thank you very much.

[@bobparrott8130]

Great info thank you 👍

[@Mybusiness1978]

Thanks for really informative video.

[@mischieftommy1252]

Thank you very sir, really fantastic explanation, could you please provide more theatrical explanation , how FD working and collect oil from the cycle.

[@michaelgonzalez1824]

Great Video!

[@yup735]

good job

[@fathmasameer7523]

Great video the chiller I have seen Model YVAA fix orifice instead drain valve (EEX)

[@HVACTIME]

You know I'm glad you said something, I made a mistake on my YVAA rundown. There is not a drain valve after the flash tank. It uses the "condenser drain valve" aka the feed valve only. I will need to make that correction some how.

[@mahendrachoudhari9598]

my best dear techar for my life great vidio for me.

[@michaelhadera3024]

Amazing video man

[@salehhamid]

Most helpfull ,,, Thanks very muck

[@mikefrantz8398]

Good stuff

[@michaelh3142]

It would be awesome to see a video on a daikin screw. In particular how the capacity slides valves work in detail.

[@donwilkes536]

it may be superheat which controls the slide valve which is typically what loads a screw compressor

[@smptbachu155]

need a separate video on edector system

[@sreejithks625]

Nice video brother...My VSD assembly in YVAA got burned. What could be the reason

[@shahidawaisee]

Pls. Look into enhancing the video lighting. Thanks

[@nathandaubis819]

after watching all the chiller videos on you tube, you have found where the BEAR SHIT IN THE WOODS...thank you. great VIDEO.

[@rdheatingandair6973]

Can you change the EXV motor on these chillers without removing the Freon

[@fredrosas2575]

Hey, great video thanks for taking the time to do them. Question. if I'm understanding right the drain valve is the metering device?

[@HVACTIME]

At its core yes, It is the final flash point that is controlling evap superheat. But the feed valve also plays a critical role in that as well.

[@fredrosas2575]

@@HVACTIME I understand now. Thanks for the quick response!

[@chiller-on]

hi. do you have a video on the channel on how to properly replace the oil on the York YVAA chiller?

[@aircooledchilleralltypes4938]

Sir chiller displays show vsd communication failure fault what is the problem

[@ahmedalameendiy]

Awesome vedio :) i think the stupid thing in this system it dont have feed back in valve position

[@anwarahmadkhan4469]

How to remove suction line from the barrack or cooler can u explained me pls

[@SombraLocs]

Great video! Where did get training on these? I know York doesn't offer training to none JCI technicians.

[@HVACTIME]

School of hard knocks and manuals lol

[@HH-oi8hn]

Hi please there is leaked in evaporater. How can I repair it only in Cerkit 1 thanks

[@shoaibmallabadkar3947]

Sir how to change oil in YVAA fladed chiller

[@travisburks628]

Have you had a oil separator on a YCAV start to plug up?

[@HVACTIME]

No haven't ran into that one

[@axltv3873]

I have same unit YCIV micro channel cond coil.im facing problem in drain valve not giving the exact position when I put manually put it to 100% open and 0% closed,when it run it having alarm low suction limiting and unusual sound of the compressor.i suspect the stipper motor module so I tried to swap from other unit but still problem occur.unit shutdown low suction pressure. Any advice

[@HVACTIME]

Extremely common for the exv gears to where out and stick causing it to get out of calibration. Recommend replacing exv.

[@Tamilsongs2813]

Pls how do oil charges this chiller pls make explain sir

[@khushimohammad5357]

How to change York chiller reciprocating oil heater old compressor

[@ziaarnie3694]

Amazing video brother, kindly explain same to Trained cvhe or cvhf water cooled chiller . Thanks

[@HVACTIME]

Coming Soon!

[@ziaarnie3694]

@@HVACTIME thanks

[@allanfernando5358]

Sir i have carrier chiller with water cooled condenser is it possible to convert to air cooled condenser.

[@HVACTIME]

I would heavily advise not to try

[@bryangillis2515]

Can you explain exactly what the economizer valve does? Is it cooling the compressor or reducing compression ratio?

[@HVACTIME]

Its pulling flash gas to reduce pressure on the flash tank.

[@jasonjohnsonHVAC]

That was what i was thinking as well

[@fathmasameer7523]

Hello brother how to reset alarm on this chiller

[@HVACTIME]

You do it through the system switches menu

[@jaymz0074]

Wouldnt happen to have a York YCUL080 air cooled service manual you could email could you?

[@hvacr3519]

where the supper heat sensor installed?

[@HVACTIME]

There is a thermistor on the suction pipe.

[@hvacr3519]

@@HVACTIME thanks

[@ferdinandbergonia6053]

How to drain the oil for YVAA? please for your advise.

[@HVACTIME]

At the oil service valve

[@aircooledchilleralltypes4938]

Sir need help

[@scottymcneill6516]

Holden, the beginning is too dark, we can't really see components.

[@HVACTIME]

Sorry did the best I could at the time.

[@scottymcneill6516]

@@HVACTIME I know brother

[@mahamudulhasan2149]

Picture not so clear

[@HVACTIME]

whats not clear?

[@mahamudulhasan2149]

@@HVACTIMEVideo not Sunny