How to Check Evaporator Superheat

In this video we discuss how to check evaporator superheat using testo smart probes in a walk-in cooler. Checking superheat at each evaporator on a multi evaporator system is important to system performance.
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[@HVACKnowItAll]

It's not always the TXV!

[@HVACToolReview]

HVAC Know It All haha truth. you must be part of a few of the HVAC Facebook groups out there.

[@lerch400block]

When it is it is when it ain't you wasted a whole fucking day.

[@jaxmoses4259]

instablaster.

[@enemyofthesheeple]

Great channel brother. I've been doing hvac/R for about 7 years. Still learning. Thanks for making videos Mr.Know it all. Lol

[@hrdworkin7633]

Great tip! The way I remember is if you want to Lower superheat, you Loosen the screw.

[@HVACKnowItAll]

Correct

[@jollyscaria1922]

Lowfrezing point ,is 2'f----'4,

[@sparkytech8787]

love the detailed explanation brother, keep them coming, I just subscriber.

[@HVACKnowItAll]

I appreciate that!

[@rubensabeast]

This just flipped the light bulb on lol thanks for the content brother

[@HVACKnowItAll]

You're welcome!

[@chrisgormley5751]

Nice explanation about the txv and how to adjust it.

[@HVACKnowItAll]

Thanks Chris!

[@farhanulrahman9302]

​@HVACKnowItAll How to find what is optimal SH OR SC Requires for a 404a system

[@fandf1449]

the best explanation so far that I've seen, do you have a video and so on subcooling?

[@ares3914]

Very important in refrigeration. I run in many times I'm proper super heat and compressors failing in a few years.

[@xraybravo7180]

Nice video graphics,good view on tablet about pressures and saturation temps over all good sound and intro music

[@HVACKnowItAll]

Thank you!

[@RobRocker09]

What about checking the condenser for the right freon pressures and checking the sight glass first. So the Condensers are running correctly, then check each evp.

[@lorenzoontiveros7875]

Thanks a lot for sharing that always scare me to try ,but u make look so easy thanks again

[@HVACKnowItAll]

You're welcome

[@RobRocker09]

would you check the site glass at the condenser is see if its flashing first, then check each evap, great video

[@robbiebritt8997]

In regards to mini split heat pump units, if you are meant to use the sub cooling method as a way to check refrigerant charge because of EEV in outdoor unit, how are you able to do it if there is only 1 service port on the Suction line and nothing on the liquid line? a lot of mini split systems seem to have this set up. thanks!

[@randyandrews2743]

Simple and to the point. Thank you.

[@HVACKnowItAll]

Thank you!

[@angrynas9668]

Cheking superheat near desire temperature

[@hectortorres542]

Thank you. If you have a chance to show the old school way with gages would be cool.

[@halilcankaya3202]

thank you sir , ı love testo equipments a lot bluetooth connection is very usefull

[@mehdimirzaei451]

Easy explanation thanks buddy

[@JaykeSapalaran-iq3qs]

Great video tutorial ❤ thank you for sharing your knowledge and experience 🫡🇵🇭♥️

[@hvactech2966]

Nice video

[@nbctcp3450]

Home split aircond R32 1. how to find target superheat in Celcius 2. do u hv chart for it 3. what remote temp do u set i.e 24 celcius, low fan, no swing

[@ashkarpk094]

nice explanation brother..

[@marjoneantifuesto4503]

thanks

[@zekenzy6486]

Great video. Happy weekend ^_^

[@HVACKnowItAll]

Thank you, you too!

[@xraybravo7180]

Great video Mr.

[@HVACKnowItAll]

Thank you!

[@ajayibabatundesamuel5663]

if the expansion valve is manufuntion on chiller what cam l do

[@supertech_hvac851]

Great content tech

[@mikegamer2732]

Nice sir. I like your tools

[@michaelminihan6430]

Nice. Great info

[@benfranqui5283]

Great job thanks

[@HVACKnowItAll]

My pleasure

[@edram1909]

Great video and thank you for sharing your knowledge! any tips for new techs in the commercial refrigeration field?

[@dnoorian]

ya, follow @dnoorian

[@videos10]

When adjusting the txv valve, and it does not respond to any turns whatsoever. Not allowing the SH to change. Would this mean txv is bad?

[@goldencoolingsolution]

Is Equalizer after expansion valve bulbe

[@CubanMofo]

What happens if you permanently take off the sensoing bulb of the

[@AlexiFernando-qy9fg]

Sir, How much SH is adequate for a -40°C Blast Chiller using 404a refrigerant in 63KW system with 150 HP Screw compressor ?

[@360hvac5]

Thanks you

[@mochamadyani]

Great video

[@abdullah_q8171]

So if i need more cooler to my package unit?

[@sknight0391]

Beautiful !!! 😎👍

[@timetotravel5886]

Awesome bro

[@eugenenel2486]

What make instrument are you using to measure super heat?

[@HVACKnowItAll]

Testo Smart Probes

[@texture6]

The medium used to absorb the heat, the refrigerant. Is related to the amount which increase or decrease The Superheat You want the right amount of refrigerant which relates to the right amount of heat absorption

[@ananthakrishnanm7717]

Can you provide details of pressure and temperature measuring device

[@HVACKnowItAll]

They are testo smart probes

[@carlosemmanuelgarciabrito791]

Nice video mate but clear my mind I read on google the for must system superheat at the evap should be 6-8 walk in cooler and 4-6 freezer can u explain that for me

[@icecoldfridgy1729]

You typically want your evap SH to be low, so you can ensure you are using more of the coil to boil off the refrigerant. High evap SH means you're loosing evap efficiency. You also have to be worried about too much system SH as to not overheat refrigerant cooled compressors, it's bad for the oil.

[@kennethportes3706]

Good day sir, about the app... How to use em

[@nhelzyoung2958]

boss is that chiller evaporator system?

[@armandoacevedo932]

Good video's👍👍👍👍👍

[@HVACKnowItAll]

Thank you

[@raviyadav8743]

Sir , how to find out proper gas charge in system by measure superheat .?

[@HVACKnowItAll]

You need to measure super heat and subcooling

[@6metal6forever6]

Looking to get a set of the Testo Smart probes. Do the probes and the app have the capability to log data and display graphs of the pressures and temps?

[@HVACKnowItAll]

In graph form yes, data logging yes as long as your phone says beside them. You cant set them up and leave for a couple days and leave. For a couple of hours no problem.

[@6metal6forever6]

@@HVACKnowItAll Thats a bit unfortunate. I was hoping to have the probes connected on the system whilst diagnosing other faults on site without having to leave my phone/tablet behind. thanks for your reply

[@HughesManHVAC]

Nice!

[@HVACKnowItAll]

Thank you!

[@Gianki00013]

Why are you checking superheat if there is a txv valve in the system?

[@HVACKnowItAll]

Tx valves still require an initial set up and periodical check.

[@AbdurRahim-ir9yz]

sir your work places?

[@stephwaylonwells3218]

👍

[@anowarhossain2558]

Hi sir

[@Kyle-sb8dj]

I always told myself lefty lessy and that stuck

[@WPM_in_ATL]

404, EH? Isn't that a freeway going north from the Don Valley Parkway? 😀 You sound like you are Canadian...if not, I will remove this comment. Having fun here in Virginia.

[@HVACKnowItAll]

Yes sir haha

[@MR-nl8xr]

I don't understand why we always adjust the stem on TXVs if they are MODULATING valves to begin with i.e. the TXV is going to adjust the needle pin for refrigerant flow to wherever the sending bulb tells it to. Adjusting the spring tension via the external stem is almost like playing with yourself, it feels good but doesn't make anything. That sending bulb and E.L. are going to tell that needle pin how much to open or close after everything is said and done anyways, do why bother. ???

[@keepthinking2666]

Cap er lary not capil a ry

[@HVACKnowItAll]

No bud, there's no such spelling as caperlary. The word is capillary - some pronounce it different than others.

[@lerch400block]

That is the wrong way to teach. Shortcuts lead to failure and misdiagnosis.

[@HVACKnowItAll]

Pardon? What is wrong?

[@wasimedoo7994]

Very good information 👍