Man this brings back memories . I started working on these and domestic refrigerators over forty seven years ago and worked my way up before retirement.
Restricted cap tube. Also you need to nitrogen sweeping (shielding gas). Fixed meter system should not operate with much if any subcool. Superheat is based on wetbulb indoor and drybulb outdoor temp. TXV is what you pay attention to subcool on.
@hvachacker586 yea, I'm familiar with the exact technicalities of the industry standards and best practices. I've worked with them for such a long time that I understand more about how the refrigerant is flowing through the circuit. Yes, wet bulb and in/out dry bulb are relevant when applying textbook precise readings, but subcool is also still relevant on a fixed metering device. Having subcool only means that liquid change has been completed. If you don't have much, or worse-if you don't have any Subcool, than you don't have a full column of liquid. If you have 0 subcool at a ground located condenser, than you for sure are boiling off on the vertical line set to the evaporator. We also charge txv systems by subcool, yes, but the TXV only serves one purpose: to maintain a preset superheat. So superheat is equally relevant on TXV systems.
Is the filter/drier plugged? I've seen them start coming apart inside with age. With all the effort personally I'd throw a $20 NOS R22 txv on there. Even after the new cap tubes you're are still at a CR of 4.3, really should be under 3.
Hello, MASTER TECHNICIAN MINDSET-How are you?? Hope you are well, recently I have looked to your channel. And saw that in your channel have many many problems, for this reason channel videos not getting much engagements. Not growing, If you can solve these problems, channel will grow, You want to know these main main problems??? I can tell if you want to know. here or in email!! Where?????
Man this brings back memories . I started working on these and domestic refrigerators over forty seven years ago and worked my way up before retirement.
@czechmate6916 wow. That's a long time ago my friend. Hats off to you!
Restricted cap tube. Also you need to nitrogen sweeping (shielding gas). Fixed meter system should not operate with much if any subcool. Superheat is based on wetbulb indoor and drybulb outdoor temp. TXV is what you pay attention to subcool on.
@hvachacker586 yea, I'm familiar with the exact technicalities of the industry standards and best practices. I've worked with them for such a long time that I understand more about how the refrigerant is flowing through the circuit. Yes, wet bulb and in/out dry bulb are relevant when applying textbook precise readings, but subcool is also still relevant on a fixed metering device. Having subcool only means that liquid change has been completed. If you don't have much, or worse-if you don't have any Subcool, than you don't have a full column of liquid. If you have 0 subcool at a ground located condenser, than you for sure are boiling off on the vertical line set to the evaporator. We also charge txv systems by subcool, yes, but the TXV only serves one purpose: to maintain a preset superheat. So superheat is equally relevant on TXV systems.
Every refrigeration system has to operate with some degree of subcooling, without it you don't get phase change in the evaporator.
Is the filter/drier plugged? I've seen them start coming apart inside with age. With all the effort personally I'd throw a $20 NOS R22 txv on there. Even after the new cap tubes you're are still at a CR of 4.3, really should be under 3.
yes very good point. under 3 is what I need to make it
? Did you need to purge nitrogen while brazing
Hello, MASTER TECHNICIAN MINDSET-How are you?? Hope you are well, recently I have looked to your channel. And saw that in your channel have many many problems, for this reason channel videos not getting much engagements. Not growing, If you can solve these problems, channel will grow, You want to know these main main problems??? I can tell if you want to know. here or in email!! Where?????