Would it be ok to pressurize a R502 taylor soft serve machine using r22 or r404a to find a leak? I have a freon/halogen leak detector but it doesn't detect r502, but does detect 404a and r22.
thanks
I'm more into nitrogen and bubbles. 1st high pressure 200psi+ and listen then dropping in 50 lb increments and finishing at 5lbs. A lot of leaks hide in high pressure by blowing the big blue away and not bubbling. Also a 502 machine is old and if you don't find the leak it's in the block of insulation covering the barrel and holding tank. If it's in there you can forget it.
It's one of those cheap harbor freight detector. It works great for the money and has always found my leaks.
I am planning to recharge to with 502
http://www.refrigerants.com/msds/r502.pdf
R115 and R-22, actually.
Actually I found the leak and it is in the insulation where the barrel is. I had to cut the mild steel covering the insulation to find it. It's made of steel not copper and it is somewhat difficult to access.
I don't want to replace the whole barrel as Taylor is asking $2,000 for that assembly. Does anyone have any suggestions? weld, braze.
thank you
Basically it's your choice as you are walking outside the normal repair zone. keep me informed as I run into a lot of mom and pops willing to chance repair of ancient equipment rather than buy something with less issues.
We were taught in school, if you use R22 as a trace gas to add vapor R22 to 5 psi then top that off with 100psi nitrogen. It does not take much R22.