Reach In Cooler Refrigeration Pressures Explained

[@ebfsystem]

I like the way you describe the troubleshooting,great video!

[@saltrue1555]

Really awesome videos, I watch them every so often to memorize them, and God bless.

[@REFRIGERATIONKITCHENEQTECH]

👍

[@garypoplin4599]

2:33 - Where can the actual design TD be found? Is it just a ROT? Also do you use a different coil TD between a walk-in cooler and a walk-in freezer? Or both 10K? I heard the 30K CTOA from school for less than 10 SEER HVAC.

[@erictello1]

To determine your auction pressure, do you use a desire box temp or the actual box temp displaying? Btw awesome videos! Thank you so much!

[@LC-qi5ff]

System with txv = actual temp , capillary = desired temp

[@Gary-ts6dh]

2:30 - Is this one of those "Rules of Thumb" they talked about in class (350CFM per ton for airflow; 20 degrees SH on residential AC; Less than 250F discharge line temperature, etc)? Where to you get information about what the TD is for specific equipment? Is that a calculation? I've not been able to find this information anywhere. In school they taught us the calculation for TD; but, not what it is supposed to be for different equipment. I still have my RACT manual; but, it's not in there either. Is there a calculation I can do from the nameplate ratings?. The closest I could get is the BTU rating of the evaporator. I walk up to a box that appears to be functioning correctly: but, how can I be certain the designed TD is correct? Is it all a guess? or is there a way to know from a chart, maybe?

[@Hudson12339]

Did you have any luck finding out more info?

[@davidanthony6065]

Thanks for the videos! If you have txv instead of captube what should my TD and split be?

[@REFRIGERATIONKITCHENEQTECH]

Current box temp minus Evap TD

[@michaellow5448]

Do you have a program for your electric and refrigeration schematics for troubleshooting

[@maxmax-ui3ks]

I liked your video. question: I have a kitchenaid fridge with dual evap and the freezer side only get to 15F and the fridge is fine at 37F. with the fridge compressor off and with the manifold connected to both hi/lo side the pressure reads 40PSI right away which means the pressures are equalized and there no obstruction, correct. ? are the pressure too high and that may explain why the freezer does not get to temp of 0F? is it worth to purge the freon and preform nitrogen pressure test?

[@RedaReda-uk9lm]

Thanks a lot. That what we were taught in college.

[@REFRIGERATIONKITCHENEQTECH]

Np, thanks for watching

[@pedropadilla9725]

Can I use same formula with a TXV?

[@Hudson12339]

No this is the formula your so-posed to use for a txv system Suction side pressure Current box temp - evaporator Temperature differential Example using r22 Current box temp =40 degrees Evaporator temperature differential of 10* This is equivalent to 30 degrees saturation or 55psi Head pressure Deviant I have 206 psi head pressure If we want between a 100-105 degree saturation temp for our high side what pressure do we need to be at? We would need between 200-216 psi to achieve that saturation temperature so

[@mradam4572]

Great video thanks for your time and explaining

[@JM-wk2tz]

What kind of hoses do you use, and you usually have to add pressure ports correct ?

[@REFRIGERATIONKITCHENEQTECH]

Yes, we braze in access port. I use smart probes for any critically charged system

[@JM-wk2tz]

@@REFRIGERATIONKITCHENEQTECH thanks, it’s a lot of work in the beginning huh, having to recover then add back refrigerant, it’d be cool to see a video of where you place the ports

[@小宇哥-z5e]

Good explaining

[@MrNebRebew]

What is the evaporator DT supposed to be for a newer domestic refrigerator with a linear compressor side-by-side unit with one evaporator in the freezer section?

[@REFRIGERATIONKITCHENEQTECH]

I do not do domestic. I had a commercial customer with a sub zero last year that I changed the evap coil on and the evap TD was 20. Might not apply to your application though unfortunately.

[@joselozano8499]

You always use 30 above ambient?

[@REFRIGERATIONKITCHENEQTECH]

Most older units use a 30F condenser air split, a lot of the newer stuff uses a 15F split.

[@maxmax-ui3ks]

here some more info: The ambient temp is 73F & it equalized very fast when the compressor is off (< 5min). few minutes after the fridge was turn on the pressure went to ~1psi on the low side and then few minutes later to 10PSI , and on the high side it started at 90PSI and went to 125PSI. The compressor temp is slightly warm, i assume since it was just started, correct? after 20min with fridge running the low side is at -10PSI and the high side is at 100PSI, and the compressor is running at high speed and starting to heat up ,does it mean the system is under charged ?

[@REFRIGERATIONKITCHENEQTECH]

If it’s r134A could be low charge or a restriction

[@maxmax-ui3ks]

Well, This fridge happen to have hi/lo ports installed and I noticed very small bubble when using soapy water. I the removed the valve and found that both shredder valvves were leaking , the rubber ring around the valve were worn out completely. How could it be ? I will replace both and see if the leak continues. Thanks

[@yungchan8914]

So if the cooler has txv we can't use suction line pressure for diagnostic?

[@REFRIGERATIONKITCHENEQTECH]

Ye would used current box temp minus evap TD as opposed to desired box temp minus evap TD

[@canadiantailgater8218]

Good explanation

[@REFRIGERATIONKITCHENEQTECH]

Thanks and welcome

[@ericksanabria168]

How do you determine if you going use 10td and 20td 30td

[@REFRIGERATIONKITCHENEQTECH]

The engineer will determine this. Reach ins are typically a 20TD

[@vickreyc]

Where do you find this split information? In the manual? Nameplates ?

[@ericksanabria168]

How you determine desire box temp

[@REFRIGERATIONKITCHENEQTECH]

It is generally 34F

[@raviyadav8743]

Do you mean box temp , set cabinet temp ?

[@REFRIGERATIONKITCHENEQTECH]

Box temp is the current temp of the cabinet. Set temp is your desired temp.

[@simohvac9222]

great explanation

[@musakavalci9470]

Another excellent video. Thank you 👌🏼

[@samjammal886]

thank you sir

[@thefreshride1510]

Thank you boss

[@REFRIGERATIONKITCHENEQTECH]

👍

[@TheChecky1988]

Jesus Christ. You are goooooood.

[@REFRIGERATIONKITCHENEQTECH]

Lol, thanks for watching!

[@cesarvargas1758]

70f plus 30 how does that equal 124 i must have missed a part

[@REFRIGERATIONKITCHENEQTECH]

70F + 30F =100F which equals 124PSI on our PT chart

[@AVirgoserviceTech]

You forgot to say a recovery process have to be done each time

[@thejedibunny4802]

Not on r290 or r600

[@sam-Moori]

Thanks a lot