@@MidwestHVACRTech I just found your channel and subscribed. Liked your process of diagnosing and looking at the big picture. Please keep posting the refrigeration calls. Thx
Great video!! I’m glad you showed the entire process of the service- not just the problem and solution. You could’ve been done after getting the fans running again but kept searching for more ways to improve the system and discovered the saturation temp being too high and not capable of a -2 set point. You’re teaching me a lot about refrigeration through this one video. I do have some questions. At one point you replaced two fuses after fixing the bad connection and left the unit over night. What was the system doing overnight? Was it only in defrost mode? Was it in defrost mode continually? What is an example of how you should not leave the system overnight? Also, you said you want a superheat around 5-7 degrees. At school I’ve been taught that it’s okay having a higher superheat value if the system is doing what it supposed to. Do you want a 5-7 degree superheat for every system as a general practice? Or did you want a 5-7 degree superheat so that system would reach set point at -2degrees? What do you use the sight glass for?
So it really does depend on the customer. I work for this customer a lot and know the managers well. I’m able to explain to them what needs to be done in a respectful way. The facility was closing soon so I told them I’d be back early in the morning to get it fixed. Leaving the thermostat at 90deg means that the refrigeration won’t engage unless that box gets above 90deg which is impossible for this application, when I got back in the morning it was at 30deg in the box still. So what I did was leave the defrost heaters on and let the defrost clock on the roof continue to run normally every 6hrs for around 40min. I usually try for a 4-7deg SH for a freezer, 7-10 SH for cooler. Super heat just depends on the application, for AC you’ll be way higher around 12-15 SH. The liquid sight-glass on any system is to see if you have a full column of liquid going to your expansion device, which for this application is a TXV. You always want a full column of liquid to have an efficient evaporator and get proper temperatures for cooling/freezing product. I will refer to you a book: Commerical Refrigeration for Air Conditioning Technicians (2nd Edition) by Dick Wirz
Like always, excellent job
I appreciate that
Excellent video
Glad you liked it
@@MidwestHVACRTech I just found your channel and subscribed. Liked your process of diagnosing and looking at the big picture. Please keep posting the refrigeration calls. Thx
@ Thats about 90% of my work so you should see plenty! Thank you
Keep posting love seeing content makes me want to post as well
@@alejandrozometa1951 there’s only so many refrigeration channels so doing my best at showing the trade and what goes into the career
Great video!! I’m glad you showed the entire process of the service- not just the problem and solution. You could’ve been done after getting the fans running again but kept searching for more ways to improve the system and discovered the saturation temp being too high and not capable of a -2 set point. You’re teaching me a lot about refrigeration through this one video. I do have some questions.
At one point you replaced two fuses after fixing the bad connection and left the unit over night. What was the system doing overnight? Was it only in defrost mode? Was it in defrost mode continually? What is an example of how you should not leave the system overnight?
Also, you said you want a superheat around 5-7 degrees. At school I’ve been taught that it’s okay having a higher superheat value if the system is doing what it supposed to. Do you want a 5-7 degree superheat for every system as a general practice? Or did you want a 5-7 degree superheat so that system would reach set point at -2degrees?
What do you use the sight glass for?
So it really does depend on the customer. I work for this customer a lot and know the managers well. I’m able to explain to them what needs to be done in a respectful way. The facility was closing soon so I told them I’d be back early in the morning to get it fixed.
Leaving the thermostat at 90deg means that the refrigeration won’t engage unless that box gets above 90deg which is impossible for this application, when I got back in the morning it was at 30deg in the box still. So what I did was leave the defrost heaters on and let the defrost clock on the roof continue to run normally every 6hrs for around 40min.
I usually try for a 4-7deg SH for a freezer, 7-10 SH for cooler. Super heat just depends on the application, for AC you’ll be way higher around 12-15 SH.
The liquid sight-glass on any system is to see if you have a full column of liquid going to your expansion device, which for this application is a TXV. You always want a full column of liquid to have an efficient evaporator and get proper temperatures for cooling/freezing product.
I will refer to you a book: Commerical Refrigeration for Air Conditioning Technicians (2nd Edition) by Dick Wirz
Thanks for all the answers and referral!!
Get that money