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Title: R-12 Substitute Post by: bubba on October 30, 2006, 01:58:51 pm I've got a buddy doing the refrigeration on one of my USS-64 machines... someone had put a tap fitting to recharge, and it ended up leaking out again. We welded new schrader fittings on the high and low sides.. He wants to put in R134A instead of R-12 or the other blend.. I didn't think they were compatible, but he is telling me it will work fine....
whatdoyathink??? Title: R-12 Substitute Post by: sodaworks on October 30, 2006, 02:54:51 pm Contact Eric at Global compressors
Title: R-12 Substitute Post by: bubba on October 30, 2006, 08:06:23 pm I was kinda hoping he would check in... I guess I'll give him a ring in the morning if he doesn't respond first... My buddy is supposed to be coming back early tomorrow am to finish it up...
Title: R-12 Substitute Post by: cvb141 on October 30, 2006, 08:47:57 pm The R134a will mix with the oil and can clog the filter/drier and or capillary line. Best to use the right refrigerant in the first place, and now is a good time to replace the filter/drier if he hasn't already when installing the schrader. Good luck.
Jerry Title: R-12 Substitute Post by: johnieG on October 31, 2006, 09:41:38 am Correct, if this is an old original compressor that has mineral oil for it's lubricant, the 134a isn't going to be compatible & it will cause the compressor to fail.
Use R12 or any of the commercial "drop-in" replacements such as HotShot/414a, 414b. R409. etc. Title: R-12 Substitute Post by: on October 31, 2006, 10:17:44 am I've seen R-12a at my local autoparts store, does this stuff work well with R-12??
Title: R-12 Substitute Post by: johnieG on November 01, 2006, 12:57:52 pm You'd have to go to the manufactures website & see if it's compatable (able to mix with...) R12, or if it's intended to totally replace it (R12), as a rule you aren't supose to mix refrigerants it's actually illegal. unless the replacement is rated/approved for "topping off" the refigerant it's compatable with, in this case R12...
Title: R-12 Substitute Post by: Yarochrehc on November 01, 2006, 06:52:48 pm Your right johnieG,
Normally you shoud not mix refrigerants, because they either will not mix properly or cool properly and that can be hard on the compressor. |