I’m a refrigeration technician out here in Chicago Illinois I’m always watching you guys vids! Love em! Always trying to improve my HVAC skills 👊🏾👍🏾🔥❄️#HVACLIFE
Great video.... Nice clear instructions...Im retired now but i wish i would have had youtube when i was just learning.i loved air-conditioning and heating work.still have a chance to do it now and then.Here im retired and like binge watching videos...LOL
So, I have a question. In residential, why does the TD suck on a AH when the system is low on charge compared to refrigeration where the space gets much colder? Is it because as the evap freezes, there is little air flow? I was thinking that since the system is low on charge, the TD would be really high basically making really cold air until it starts to freeze.
super video, I like how you said the super heat protects the compressor, but it would be nice to point out that high super heat is less efficient so its a trade off. Also nice to point out why high sub cool means you have more ability to cool. Lastly it would be nice to mention that heat pumps exist and they have some extra components and link to your other video. Heat pumps are becoming much more common and lots of technicians are afraid to deal with them.
mini splits deal with liquid refrigerator coming from evaporator coil into compressor by putting accumulator on the suction line of the compressor. this not only protects compressor by preventing liquid refrigerant going into the compressor and keeps super heat to the level of maximum efficiency. i wonder why other hvac machines don't follow this approach?
thanks for the clear explanation. whats the benefit of pumping down the system instead of shutting down the compressor and solenoid valve at the same time? is it to pump out the refrigerant from evaporator so it doesnt freeze up?
Pumps Refrigerant into condenser to prevent migration. On walk in coolers and freezers it’s coming to energize the the solenoid with a stat. When the solenoid closes a low pressure cutout will shut the compressor off. The LP control has a cut in range and cutout range for contacts to bring the compressor on and shut it off.
@@JohnnyJr396 i understad how the pump down works but i dont fully understand the reason behind it. if its only because of refrigerant migration, doesnt shutting off the power to the compressor and solenoid valve achieve the same thing? you turn off the compressor and solenoid from thermostat , and the solenoid valve prevents refrigerant from migration. the only difference i see is that the compressor would pump the refrigerant out of the evaporator before turning off which achieves what exactly?
@@faintsmile3279 don’t know why my reply never showed with a link. Anyway refrigerant will migrate to a cooler area, in the case of a cooler freezer it’s the evap. If the unit started up it would slug the compressor.
@@JohnnyJr396 makes sense thanks for the explanation. is there any downside to pumping down instead of cutting off power to compressor and solenoid valve at the same time? ive worked on so many cold rooms and only a handful of them used the pump down method (and that was because of a different reason). although all of them have accumulators and heat exchangers so can that be why?
@@jacobaberwald6072 Thank you for the response, its been a long time since i work on refrigeration systems because i do residential and sometimes light commercial. Ty
I have to do a shout out and promote your channel to my Automotive subscribers so they can learn more about automotive air-conditioning through year channel because the automotive industry does a very poor job of teaching air conditioning.
Got the book. So worth it. Feel smarter every day thank to you!
So awesome! Thanks Lucas!
Thanks Craig for ALL your videos. Can we have more on refrigeration??
It is very helpful. Thank you!
I bought his book months ago, good read, alot of information!!!!
I wish I had Half of the knowledge of this guy.
I’m a refrigeration technician out here in Chicago Illinois I’m always watching you guys vids! Love em! Always trying to improve my HVAC skills 👊🏾👍🏾🔥❄️#HVACLIFE
What’s the salary there ?
Thermodynamics 101. Great stuff...
I'm currently in HVAC school and these videos help me so much! Thanks man!
Thats awesome. thanks!
I need to know more about head pressure control and how troubleshooting it, and if you would more videos about walking cooler and freezers. Thank you
Great video.... Nice clear instructions...Im retired now but i wish i would have had youtube when i was just learning.i loved air-conditioning and heating work.still have a chance to do it now and then.Here im retired and like binge watching videos...LOL
Never stop learning😉 it’ll prolong life!
Thank you for the great video.
This is some great content my man! I am currently in HVAC school now and this helps me tremendously! 🙏
Thanks Craig for explaining perfect HVACR
I want to be an AC technician, where do I get the knowledge, and what knowledge should I learn first?
why does it have the have to go into pump down why can't it just run like a refrigerator is it to keep refrigerant out of the area where the food is.
Thanks again for the videos!
🍺🍺🍺🥃🥃🎳⛳
Stay safe.
Retired (werk'n)keyboard super tech. Wear your safety glasses!
So, I have a question. In residential, why does the TD suck on a AH when the system is low on charge compared to refrigeration where the space gets much colder? Is it because as the evap freezes, there is little air flow? I was thinking that since the system is low on charge, the TD would be really high basically making really cold air until it starts to freeze.
Thanks , how can we contact you please .
This is very good. Oh to find the time to watch all these videos
Awesome video. Thank. Do you video on wiring and controls part of system? Also sequence.
Thank you very much for always explaining at a level. Good luck to you
Very niece sir ji ❤❤❤
you're the man!!!!!! thanks, Craig for sharing.
Great job, thank you brother. You are so talented
I’m going to get your book!! Your great!!
Thats so encouraging! Please let me know what you think of it after reading it!
@@acservicetechchannel no. YOU ARE ENCOURAGING! Lol. Seriously
Great animations, and info. Thanks Craig.
He talks so fast
Very informative! Thanks 😊
🤘⚡️🤘✨✨✨✨✨
Thanks from india gujarat
wow
super video, I like how you said the super heat protects the compressor, but it would be nice to point out that high super heat is less efficient so its a trade off. Also nice to point out why high sub cool means you have more ability to cool. Lastly it would be nice to mention that heat pumps exist and they have some extra components and link to your other video. Heat pumps are becoming much more common and lots of technicians are afraid to deal with them.
mini splits deal with liquid refrigerator coming from evaporator coil into compressor by putting accumulator on the suction line of the compressor. this not only protects compressor by preventing liquid refrigerant going into the compressor and keeps super heat to the level of maximum efficiency.
i wonder why other hvac machines don't follow this approach?
You appear to have numerous "nice" suggestions. Maybe you could start your own RUclips channel and go over all these "nice" points.
Gracias , you are the best
Nice thanks
thanks for the clear explanation. whats the benefit of pumping down the system instead of shutting down the compressor and solenoid valve at the same time? is it to pump out the refrigerant from evaporator so it doesnt freeze up?
Pumps
Refrigerant into condenser to prevent migration. On walk in coolers and freezers it’s coming to energize the the solenoid with a stat. When the solenoid closes a low pressure cutout will shut the compressor off. The LP control has a cut in range and cutout range for contacts to bring the compressor on and shut it off.
@@JohnnyJr396 i understad how the pump down works but i dont fully understand the reason behind it. if its only because of refrigerant migration, doesnt shutting off the power to the compressor and solenoid valve achieve the same thing? you turn off the compressor and solenoid from thermostat , and the solenoid valve prevents refrigerant from migration.
the only difference i see is that the compressor would pump the refrigerant out of the evaporator before turning off which achieves what exactly?
@@faintsmile3279 don’t know why my reply never showed with a link. Anyway refrigerant will migrate to a cooler area, in the case of a cooler freezer it’s the evap. If the unit started up it would slug the compressor.
@@JohnnyJr396 makes sense thanks for the explanation.
is there any downside to pumping down instead of cutting off power to compressor and solenoid valve at the same time?
ive worked on so many cold rooms and only a handful of them used the pump down method (and that was because of a different reason). although all of them have accumulators and heat exchangers so can that be why?
Thanks
👍❄🇺🇸💪
👍
Great video. Clearly explained. Love the videos. Keep up the great work
I am a Refrigeration technician from Kenya 🇰🇪 unfortunately I am unable to find a job
Your not saying anything wrong just bad approach to get people to understand.
I totally agree!
Thank you for this video. Question? Does the king valve have open, closed and cracked (meaning i can read pressures). Thanks in advance.
A king valve can be front seated, back seated and cracked open to read pressures.
@@jacobaberwald6072 Thank you for the response, its been a long time since i work on refrigeration systems because i do residential and sometimes light commercial. Ty
I have to do a shout out and promote your channel to my Automotive subscribers so they can learn more about automotive air-conditioning through year channel because the automotive industry does a very poor job of teaching air conditioning.
love your channel dude
@@faintsmile3279 thanks