Thanks for the great videos

So glad you made these smaller bits of subjects so we newbies don't get lost. You u are da'best!

Fantastic explaination. Great examples that promote understanding why s/h is important. Using the terms under feeding and overfeeding is a great way to visualize what going on in the evap. coil.👍

Awesome info.... it’s AMAZING how many people I know in the field who haven’t fully digested this.

This is very informative.. I would really like to hear those other podcasts on this topic as mentioned. Thank you, Sir!

I agree with that, and after 32 years I still use "Compressor Insurance"; the compressor is a VAPOR PUMP, and you want only vapor going to the compressor. A high superheat MAY be (withing design conditions) a less "aggressive" evaporator, and a low superheat MAY be (within design conditions) an indication of a more "aggressive" evaporator. The greatest transfer of heat takes place during the change of state. That's how I was taught. Within design conditions, superheat may tell us how much of the evaporator we're using. GREAT CHANNEL, THE BEST. I teach all the methods you mentioned at the outset as well to my newbies. GREAT WORK. After 30 years I pick things up from you.

@ethank2466

Жыл бұрын

A compressor doesn't pump though it compresses

We use subcooling and super heat all the time in the fridge process. I work for Scotsman industries, an ice machine manufacturer. Both readings are super important and helpful in determining and diagnosing problems and proper function. Nice and simple video you made. Sometimes it’s easier to use water as an example of super heat as most if not all are familiar with its characteristics. An example would be waters boiling point. Thus, if water is able under pressure to absorb one more degree of heat past its boiling point, we now call that one degree above boiling, super heat(ed) (steam) or vapor.

Very well explained, keep up the awesome work! Thanks

Simple and to the point,, great video

nice podcast keep up the amazing work

Really appreciate the informative video

Excellent explanation

MARVELOUS CHAT, appreciate it

Thanks for an awesome video

Visualize steam in the evaporator . At least that works for me . Google super heated steam . It’s a good analogy.

So many tech dont know this.. 80% dont know VS 20% know in résidentiel. I feel like a super hero when a see this.

Great explanation. But I prefer the terms starved and flooded

Thanks for that explanation, Sir, could you please get time and explain on how a four way reverse valves operate and solenoid valve operation.

well explanation

Can you check super heat on a freezer if it has frost inside? If you go to the super market and go to the ice cream freezers and they working perfectly fine with lots of frost.. would you get a accurate reading if you had to put gauges on?

Can you do one on Subcooling?

@johnbot320

4 жыл бұрын

yeah i thought the same thng

Superheat is the amount of heat absorbed by the refrigerant after it has fully vaporized.

What i don't understand: Why is the temperature-bulb of a TxV direct behind the evaporator? Would it not be more accurate if it would be direkt before the compressor? Because that is the point, where i want to have a little bit superheat? Sometimes, especially in split-ACs there can be 10m between evaporator outlet and compressor inlet. So, if the superheat at the evaporator outlett is perfect, the superheat at the compressor inlet can be totally different.

Awesome

I really like the way you explain refrigeration and air-condition systems ,am anew Hvac technician, and I would like to ask you how to acquire EPA 608 certificate? Thanks alot.

I like your videos very much even i am not a native english speaker. Your videos are much better then the most german videos. But one question: Could you make an explanation video about subcooling? I know that the purpose of subcooling is to protect the TXV from imploding bubbles and caviation but why can a higher subcooling increase efficiency?

I'm disturbed that so few people have engaged with this video.

@InsideOfMyOwnMind

5 жыл бұрын

I'm not even in the trade and I agree with you. This seems like one of the first things you have to understand going in. As it turns out his explanation was exactly what I understood it to be.

hi, i was working on an r22 system with fixed orifice. subcooling was at 9f and my superheat was 2f. the suction temp. was about 30f. there was lots of nice cold air coming out from floor register. please help as i have no idea what the problem is. thank you for all your helpful videos.

@ronnyoo9371

4 жыл бұрын

30 is below freezing air regardless kinda sounds like u are low on “freon” hard to say with knowledge of conditions /

6:18 ok. When you say high super heat meaning that it's bring underfeed . But what about the subcooling.

that makes more sence

did you just say as long as everything is kal Bitzedek? (8:52)

@realSamAndrew

2 жыл бұрын

There is an English word of copacetic.

Thanks for that. I’m an appliance tech, getting into HVAC, but how I could use these principals, practically for fridges? Obviously a lot of fridges aren’t worth seal system repairs, but the higher end sub zero and Vikings are. I would like to be able take this knowledge and apply it to fridges. I asked you a question before with no reply, so if there is a better way for me to ask you, please let me know. Thanks again for all the vids!!

@HVACS

6 жыл бұрын

You can measure suction superheat on refrigeration in the same way and it has the same significance as A/C

@toneblair

6 жыл бұрын

HVAC School would you measure at the compressor, or outlet of evaporator? Thanks for the reply!

@darenhouser427

4 жыл бұрын

toneblair at the outlet of the evaporator

Wouldn’t you say that superheat in simple terms is like a buffer? Not too much or too little, just enough to keep the unit in check once it reaches the desired temperature.

So what your saying is if you have a house that's 90deg indoor and it's 95 outdoor if you show up and bam instantly throw ur gauges on and see you got 50 deg superheat and start pumping refrigerant into the system and say your unit says it wants 10deg superheat .....so you bring it down to that in the first 15 min your there ...once it the tstat starts bringing it down to 65 deg probably before that once indoor drops your going to find urself extremely overcharged ... And u gonna start flooding the compressor.....????

@mrfauk1948

5 жыл бұрын

So we can agree that 65 to 70 degrees is going to be a target temperature for most homes .. .so depending on climate .. You should stay to the high or he low side of the exceptable actuall super heat .... once u have slowly brought the home down to desired operating temp assuming that the unit is sigzed properly...

@mrfauk1948

5 жыл бұрын

Remembering pressure and temp in refrigerants go hand and hand unit will read high pressure at high temp so u can't just say well oh they all run about 130 low side ...ull end up way over charged

@caru3257

5 жыл бұрын

@@mrfauk1948 in my area 72-76. I may be taking care of baby boomers.

@HVACRat

4 жыл бұрын

No, what he is saying is the Superheat is directly related to the amount of heat being absorbed by the refrigerant (ubderfeeding = too much heat, overfeeding = not enough heat). In your scenario (90° indoor and 95° outdoor) you will never see a charging chart call for 10° of Superheat. In fact, most Superheat calculators and charts only go to 76-78° indoor wetbulb. In your scenario you need to bring the indoor conditions down to where they are on the chart first (76° IDWB) BEFORE you set the charge. Then (76° IDWB) the Superheat will be about 29° for correct charge, so that when it does drop to 72° inside (say 68° IDWB) the Superheat will be 14° and you will not be feeding the compressor liquid.

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Uhm, latent heat of evaporation.

@HVACS

6 жыл бұрын

What? Did I say something wrong? That happens sometimes 😉

@tyl8ter

6 жыл бұрын

Max R Now explain it....That's what good teachers do...Thank Brian another great video

@MR-nl8xr

6 жыл бұрын

Michael Madrigal. Mind your business.

@MR-nl8xr

6 жыл бұрын

HVAC School. No, you just said to ask new techs what superheat means to them so i gave my answer.

Superheat is to measure efficiency of a system. This is done last after the charge is calculated based on line set run and factory charge, proper installation, proper airflow and CFMs for system and equipment is properly sized for application. If any of those factors are off or a combination of factors, it will throw off your superheat reading. This I never check superheat until I know the system is sound and properly installed for said space/application.

I asked one of the new techs and he shrugged it off.

what do you do when you have a furnace problem that seemingly no tech can solve.. you go on yuo tube ..:) thats me