As someone who doesn’t know anything about refrigeration, this was an amazing explanation. It answered a lot of questions and gave me a big inside in case I ever have to do refrigeration
I got into the HVAC in the mid 70s , I was in the commercial refrigeration side of our shop. We served malls and restaurants. Man if we would have had access to a channel such as yours I would have become a well-seasoned tech much quicker. You do a great service to our industry. Keep up the great videos.
Wow I love these 3D simulators. You can’t get much more accurate then this. As a Hvacr tech I am new to refrigeration and becoming more knowledged in resisdential but the next step is commercial refrigeration. Thank you for taking this time to ensure we understand these presentations
I'd wire those two 120 volt, permanent split capacitor evaporator fan motors to a series parallel contactor that runs them in series during the off cycle and parallel during the cooling cycle. Permanent split capacitor fan motors run very well at reduced voltage, running slower, consuming less power, and running cooler. This will save energy, and reduce the heat load on the system, while still providing plenty of air circulation during the off cycle.
Thank you I have begun to focus more on the commercial side as of recently. I have done this to expand my options and skill set. I appreciate all that you do for the HVACR industry…… GOD bless you all,stay safe out there brothers….and remember to never rush to judgment. Thank You!!
This is such a great video…i have my cfessa certification course at the end of this week. Just refreshing from the bottom up and I’m so confident, thanks for this video. Definitely one to save while I’m in a pinch!
This is amazing. I’m a seasoned resi tech but not so much refrigeration. I had an idea but this just clarified it tot the point that I can properly do service on them with confidence.
FYI - Not only refrigeration systems that have a pump down feature built into them, but many manufacturers such as APC, Bard, Liebert, Stulz, and Unlflair all do as well…
This was an excellent demonstration. Very helpful for me to understand better whats going on. I am also coming from residential air conditioning. Thank you!
This is such a great video! I’m very new to refrigeration, but at my work we have so many issues with the many many HVAC units, and several walk-in coolers. We can’t seem to find anyone that can reliably repair the walk-in units, they either say the entire unit needs replaced, or they try and fail over and over again. Talking to them it’s clear they don’t actually understand them, which makes it hard to work on them. I’ve taken over the maintenance as far as changing filters, keeping condensate drains working and pans clean, replacing start capacitors when they fail etc, so basically I do what I can before calling for help, then watch and learn what I can. I have installed smart thermostats everywhere, since the employees like to turn some units to heat while others are set to cooling, and now have it automated so if one is changed to heat, all the others do as well and vice versa. But this walk-in is driving me crazy, it seems to want to freeze up every week or so, I have widened the temperature setting so it stays off longer between runs giving it time to defrost more, which seems to be working, and also have sealed up a few air leaks where new lines were run in and not sealed up which seemed to help a lot according to the temperature sensor I’ve installed which logs as well so I can see the patterns. But, what this video has opened my eyes to is the fact that the outdoor unit NEVER turns off! So I will be looking into that when I get to work tomorrow, thanks so much for your effort.
Thanks for posting need I can visualize the step procedures, now that got me to go get a back up solenoid operated weight refrigerate scale its just one of those things to own two of! Love the lesson shows! All day I'm to words that teach me! 🙌
As a professional smartass myself i was only able to find one flaw in this video. The explanation and narration was perfect as far as i could tell, but with the graphical representation there were no fileted solder joints except the liquid line filter drier. Great video
Great video. Thank you. It would be good mentioning that cut out at 5 psig is for reciprocating compressors and for scroll it has to be higher then 10 at least. Also for R404a refrigerant cut in of 15 psig is se to low and in most cases it goes in area 20psig and higher. Thanks again for amazing video.
Wouldn't the Cut-in pressure be 80 psi and the cut out pressure be about 70 psi with 404a? To maintain a box temp of 36F degrees? Assuming you have to use a Pt chart to set the pressures on the pressure control. 15 psi is about -22 with 404a. Seems a little low for a box temp of 36F
@Austin Burtch thermosta in this case is regulating temperature in side box by closing and opening soleoid valve. It is set that way that remove most of refrigerant from low side of the system. If thermostat is removed then low pressure switch would be set differently.
Oh yea lol I forgot about the t-stat in this situation 😂 I don't work on much refrigeration and the last one I worked on used the low pressure control to regulate the box temp not using a t-stat or pump down solenoid. Thank you for bouncing my brain back to Earth
Thank you for making this video the time and attention to detail is amazing this will serve as a great reference for new techs and experienced alike! cheers gentlemen!
