I checked out your web site and I am very interested in it the intro to chillers, but I noticed a good portion remains under construction? How often do you plan on adding material?
Awesome, would be great to have you a part of the community. Great question, I am adding a new lesson daily on average. At first I was trying to release full modules at a time but have found it much more consistent releasing daily. They will typically post before lunch except for Saturday.
@@jorgejaimes3147 igv is moved by the algorithm in the controller to keep leaving water temp at or very close to set point . Other things can influence how the far or locked in placed for the igv movement if a condition exists that exceeds the machines limits that would keep the IGV from moving to the desired position but that's protection for the machine we don't move those manually
@@bunnyman6321 it's an abbreviation for inlet guide vanes. It's the vanes that control capacity on a machine like this. It can go up and down to modulate capacity. They open wide for machine to go to 100 capacity when the water temperature is far from the setpoint this makes the machine work harder when it reaches near the setpoint it closes somewhat the IGV to reduce capacity and stay close to the setpoint . It's capacity control of the unit. Kind of an unloader on a recip compressor or multi stage cooling and heating
1st year apprentice here, working for a commercial/industrial company. Today I punched tubes for the first time, on a carrier. One thing I like todo at the end of the day is search for educational content on what I did that day. And today I found your video, thanks for the knowledge my friend 🙏 🤑
I like the detail that you give us I am up-and-coming certified Universal and wanting to service and have great knowledge of chillers so you helped me a lot thank you
Daikin has developed a system that practically eliminates surging, one of the things they,ve added is a checkvalve on de discharge of the compressor, this counteracts the reverse flow that comes from the condenser back towards the compressor discharge. as we all know surge is when the condenser pressure is greater than discharge pressure this phenomenon is synonimous with surge
@@CryptoAbe “about to go bankrupt”…..you do realize Daikin is the largest HVAC manufacturer in the world right? Do you even know what you’re talking about?
Can you explain why we loose capacity with the Economizer? I brought it up some I was told I was wrong but didn’t have enough info to explain it. Somebody help lol
Maybe because you are using compressor power to cool The refrigerant, not the water the chiller is intended to. The term "less capacity" refers to total cooling capacity available to chill the water Like in a car for example, you use engine power to run auxiliaries like alternator, coolant pump...
Its okay, its mission critical, your stuff has to just work & keeping a fine healthy relationship with the techs working on it for a living gives full sense of comfort, unlike those simply shilling for products on YT, this is a major indication of trust when it comes to equipment like this and word gets around very fast in the trades.
One thing. . Oil don’t sit on the bottom of the evap it floats on top of the refrigerant. Which is why under light loads we don’t get oil return back because there is no aggressive boiling breaking the oil out of the refrigerant. I would be interested to know actually how far that secondary oil return line goes up into evap?
Another great content! Is my understanding correct for how lowering CHWS set point causes a drop in chiller cooling capacity. For AFD controlled compressor, - chws set point is lowered, - compressor speed increases - increased refrigerant discharge volume to condenser - Liquid refrigerant builds up in condenser - Head pressure increases on first flash plate - Increased subcooling and increased flashed ref gas. - Decreased volume of liquid refrigerant returning to evaporator and increased flashed gas to economiser. Am I getting it right? Thanks!
Liquid decreases in the condenser due to density at colder temps, speed increase to compensate for the volume available. On a normal machine that has a txv sub cooling will decrease.
I think it depends of the type of compressor, expansion device.... In general higher than normal condenser pressures followed by high current possibly tripping alarms for those reasons Particularities in each machine, for example, chillers using exv's you could see control tendency to close the valve more than normal (rthd, rtwd, ylaa, cgam, 30rap) Yk,s you could see control trying to close orifice beyond setpoint Others like ycav fill valve fighting with high subcooling.... If that's the case a good idea is to recover refrigerant in vapor fase only...
York has a new low pressure magnetic bearing machine called YZ .I had the chance to see it after it was commissioned at the start of this summer. It was for a condo. Beautiful piece of equipment.
To my understanding the first generation of ymc2's came with all the load control strategies available: prv, vgd (yes, also used for load control), vsd. Then they decide to skip some of those Maybe they found that vsd+Vgd is enough for load and surge control
Usually surge is agravated by two things; a poor cooling tower performance [tower effectiveness, not adequate] meaning that the tower is undersized for that given moment and time, tower operating outside of the design approach. Also a deficit or lower then normal flow within the condenser shell. This increase in pressure within the condenser shell, overcomes compressor discharge pressure / Surge
There is definitely more things that could cause a surge, especially on these chillers. All depends on if you're talking about a high end surge or a low end surge.
very good content. Can you make a video about TurboCore compressors. I personally have been seeing more and more Daikin Maglev and Multistack using Danfoss TurboCore compressors.
i want to know why this trane chiller shut down with afd hi temp alam , what is the problem and how to fix it..because i have big knowledge abut chiller ..please explain
Have you verified your cooling system for the afd? If you'd like in-depth Chiller support I have a chiller community to discuss troubleshooting help for everyone enrolled at chilleracademy.com
The reason that the oil tank is heated is to keep liquid refrigerant from draining or condensing into the oil tank. Liquid refrigerant is heavier than oil and would cover the electric oil pump intake, feed refrigerant instead of oil on start up, destroying the bearings. The oil pressure control doesn't know difference in liquid refrigerant from oil.
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I checked out your web site and I am very interested in it the intro to chillers, but I noticed a good portion remains under construction? How often do you plan on adding material?
Awesome, would be great to have you a part of the community. Great question, I am adding a new lesson daily on average. At first I was trying to release full modules at a time but have found it much more consistent releasing daily. They will typically post before lunch except for Saturday.
I'm a chiller and boiler mechanic and I cant say I've ever heard some one dumb it down for me as well as you have. This makes a lot more sense, Aces
Good afternoon, I have a question, what does the opening of the IGV depend on?
@@jorgejaimes3147 igv is moved by the algorithm in the controller to keep leaving water temp at or very close to set point . Other things can influence how the far or locked in placed for the igv movement if a condition exists that exceeds the machines limits that would keep the IGV from moving to the desired position but that's protection for the machine we don't move those manually
@@juliocastaneda9864 What's igv?
@@bunnyman6321 it's an abbreviation for inlet guide vanes. It's the vanes that control capacity on a machine like this. It can go up and down to modulate capacity. They open wide for machine to go to 100 capacity when the water temperature is far from the setpoint this makes the machine work harder when it reaches near the setpoint it closes somewhat the IGV to reduce capacity and stay close to the setpoint . It's capacity control of the unit. Kind of an unloader on a recip compressor or multi stage cooling and heating
@@juliocastaneda9864 Thanks!
Do commercial hvac techs deal with plc?
1st year apprentice here, working for a commercial/industrial company. Today I punched tubes for the first time, on a carrier. One thing I like todo at the end of the day is search for educational content on what I did that day. And today I found your video, thanks for the knowledge my friend 🙏 🤑
intro to chillers course launching at chilleracademy.com on Monday! welcome to the industrial side!
I am a mechanical engineer and this is a great explanation full of practical tips. Thank you!
Definitely a good video.
Why is it the Engineering world is so full of "geniuses", but almost all of them can't even teach a pet rock to sit?
Great video, man! We appreciate your time!
I like the detail that you give us I am up-and-coming certified Universal and wanting to service and have great knowledge of chillers so you helped me a lot thank you
Worked on a CVHF570 this week, pulled the rear bearings. Good video.
How to video?
That’s what I thought just wasn’t 100% positive. Thanks for the reply and thank you for what you do. Great job and love your vids.👍
Thank you!
Awesome video. You are killing it man!!
Amazing man just amazing, total respect and admiration
Thanks!
Thank you!
Awesome explanation!! Even Trane couldn't explain this much!!! Thank you Sir!!♥️
Thanks for the video, great explanation of the centrifugal unit!
11:30 also because greater lift requirements for other refrigerants like r134a found in YK 's
Very easy to understand explanation thanks
Great Video, We are having an oil migration issue one of our CVHH-SVX001A units and assistance on how to get it to migrate back would be fantastic
Good afternoon, I would like to know the measurement of the condenser sealing ring? I will be very grateful for your help
Great job sir I am really saying I clear all my doubts in your video very well done 👏
Daikin has developed a system that practically eliminates surging, one of the things they,ve added is a checkvalve on de discharge of the compressor, this counteracts the reverse flow that comes from the condenser back towards the compressor discharge. as we all know surge is when the condenser pressure is greater than discharge pressure this phenomenon is synonimous with surge
Daikin is about to go bankrupt... pile of junk
@@CryptoAbe “about to go bankrupt”…..you do realize Daikin is the largest HVAC manufacturer in the world right? Do you even know what you’re talking about?
@@CryptoAbe lmao dude. No clue what you are talking about
Dear,
Thanks with lots of love.
Great video
Bless u. Valuble infos.keep up the good work
Thank you for explaining it like a tech to tech 😂
Can you explain why we loose capacity with the Economizer? I brought it up some I was told I was wrong but didn’t have enough info to explain it. Somebody help lol
Maybe because you are using compressor power to cool The refrigerant, not the water the chiller is intended to. The term "less capacity" refers to total cooling capacity available to chill the water
Like in a car for example, you use engine power to run auxiliaries like alternator, coolant pump...
513 and 514 is the new flavor of juices being used
Thank you for the videos please keep it up
These are a absolute work horse! I love these machines. Even though I work for jci.
Its okay, its mission critical, your stuff has to just work & keeping a fine healthy relationship with the techs working on it for a living gives full sense of comfort, unlike those simply shilling for products on YT, this is a major indication of trust when it comes to equipment like this and word gets around very fast in the trades.
Work w/ R-11 & R-12 Trane Centravac chillers a very nice reliable machine.
An in depth video, even if it is a short one, on the CVHF/E motor refer cooling cycle would be nice.
Will you please help me out about carrier 19XR centrifugal water cooled chiller.
One thing. . Oil don’t sit on the bottom of the evap it floats on top of the refrigerant. Which is why under light loads we don’t get oil return back because there is no aggressive boiling breaking the oil out of the refrigerant. I would be interested to know actually how far that secondary oil return line goes up into evap?
Amazing as always bro . thank you
Another great content! Is my understanding correct for how lowering CHWS set point causes a drop in chiller cooling capacity.
For AFD controlled compressor,
- chws set point is lowered,
- compressor speed increases
- increased refrigerant discharge volume to condenser
- Liquid refrigerant builds up in condenser
- Head pressure increases on first flash plate
- Increased subcooling and increased flashed ref gas.
- Decreased volume of liquid refrigerant returning to evaporator and increased flashed gas to economiser.
Am I getting it right?
Thanks!
Correct. Lower the setpoint the less total capacity it will carry. And become more inefficient.
@@HVACTIME im amazed how you reply so quickly! Thanks again 💪🏽
@@rupertstaana3382 here to help
Liquid decreases in the condenser due to density at colder temps, speed increase to compensate for the volume available. On a normal machine that has a txv sub cooling will decrease.
Compression ratios matter. Orifice doesn’t care….. txv, exv or float all is related to lift.
Hello my brother I have a problem on the Trane RTAD165 group I have an alarm (Temp winding -comp A)
Hello what are the symptoms of a overcharged chiller?
Good question.
I think it depends of the type of compressor, expansion device....
In general higher than normal condenser pressures followed by high current possibly tripping alarms for those reasons
Particularities in each machine, for example, chillers using exv's you could see control tendency to close the valve more than normal (rthd, rtwd, ylaa, cgam, 30rap)
Yk,s you could see control trying to close orifice beyond setpoint
Others like ycav fill valve fighting with high subcooling....
If that's the case a good idea is to recover refrigerant in vapor fase only...
York has a new low pressure magnetic bearing machine called YZ .I had the chance to see it after it was commissioned at the start of this summer. It was for a condo. Beautiful piece of equipment.
Yes it is! What I find intriguing is they have fixed IGV.
Until you have to fix it.
To my understanding the first generation of ymc2's came with all the load control strategies available: prv, vgd (yes, also used for load control), vsd. Then they decide to skip some of those
Maybe they found that vsd+Vgd is enough for load and surge control
Another Great video. Thanks.
What is the oil line that’s right next to the tang operator?
Usually surge is agravated by two things; a poor cooling tower performance [tower effectiveness, not adequate] meaning that the tower is undersized for that given moment and time, tower operating outside of the design approach. Also a deficit or lower then normal flow within the condenser shell. This increase in pressure within the condenser shell, overcomes compressor discharge pressure / Surge
There is definitely more things that could cause a surge, especially on these chillers. All depends on if you're talking about a high end surge or a low end surge.
Love it bro 👍🏽
Very helpful
Nice well explained thanks man!
very good content. Can you make a video about TurboCore compressors. I personally have been seeing more and more Daikin Maglev and Multistack using Danfoss TurboCore compressors.
Sure can, that would be a great one to do!
Tip speeds the same. Geared or not.
i want to know why this trane chiller shut down with afd hi temp alam , what is the problem and how to fix it..because i have big knowledge abut chiller ..please explain
Have you verified your cooling system for the afd? If you'd like in-depth Chiller support I have a chiller community to discuss troubleshooting help for everyone enrolled at chilleracademy.com
How to change noil of trane
this model chiller High current Alam rejoin?
the ones we have is from g group five of them 160,137(2) two 50 tons
Ek videoHindi me bhi translet karke banaye sir
Great
Sir trane rtaf techview software is free
How do you gain subcooling from flashing?
In the same way sweat takes heat from your body by evaporating. When the flash happens the gas pulls heat from the liquid dropping the subcool temp.
@@HVACTIME Great VDO, thank you.
👍 great info Thank U
The reason that the oil tank is heated is to keep liquid refrigerant from draining or condensing into the oil tank. Liquid refrigerant is heavier than oil and would cover the electric oil pump intake, feed refrigerant instead of oil on start up, destroying the bearings. The oil pressure control doesn't know difference in liquid refrigerant from oil.
Have you work with TRANE RTAF OR RTAE?
Yes
@@HVACTIME what the difference of rtac and rtae in terms of design.
Keep em coming ! Are you from NY?
East Texas
nice
Come and work for Google datacenters...apply, won't regret it
Mitsubishi bought the company now
I work ministry of health
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