Reach In Cooler Refrigeration Pressures Explained 

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

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

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?

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!

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.

Great video thanks for your time and explaining

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?

Thanks a lot

Good explaining

Good explanation

great explanation

thank you sir

Another excellent video. Thank you 👌🏼

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

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 ?

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?

Thank you boss

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

How you determine desire box temp

Jesus Christ. You are goooooood.

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

You always use 30 above ambient?

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

Do you mean box temp , set cabinet temp ?

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

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