ct2, why aren't you in class?
Originally posted by ct2
...so I will simply say that it is recomended that the coil also be changed due to the higher pressures associated with 410a
You didn't graduate already did you?
Did you see the "correct me if I am wrong", part?
I'm always willing to learn.
Have you cut one open yet?
I've got a few 410a coil lab samples from various manufacturers, and they are woefully thin, in search of the mighty SEER/COP.
They are encased in plastic, so hard to actually measure thickness.
I have a few new coils & systems in my labs that I could sacrifice in the name of education.
That might be a good project for next week.
After I cut one up, I'll send you a piece of it, if you want it.
I usually give my classes a chance to ruin new equipment before dissection, but I am willing to shortcut the process.
The question was about the connecting tubing, not the coil.
The lineset will be MUCH thicker than the coil, old or new, therefore not the weak link. The header on the coil is thicker, too. The thinnest part of the coil is the part that is covered with fins, plus the return bends, usually at the back of an A-coil.
It has ALWAYS been recommended to change the indoor coil, so why should R-410a be any different?
As usual, correct me if I am wrong.
Heap it on, my shoulders are broad...
RSES Certificate Member Specialist
Southwest Regional Association of RSES Secretary, 2017