[QUOTE=frick;1765790][QUOTE=stickerhead;1765233 I never agreed with Trane's 2mm or 2000 microns.
hell sticker york's acceptable evacuation is 5k microns (IT'S IN THE BOOK)[/QUOTE]
The book hasn't been updated since purges were real purges and R-11 was 25 cents a pound. Remember leak checking with nitrogen pressurize and leak check.....run the purge overnight and run and log next morning.....annual parts list included a 100 lbs. of gas......no wonder the ozone shrunk
I thought you would have all 3 hooked up and checked them all. Naw, you know I'm just harassing you!! But mercury does not lie, so 1mm of Hg equals 1k microns, which to me on some of the chillers is more than acceptable for a deep vacuum.
engineguy, yeah, you guv, looking for you to get here someday. I just had the mercury manometer drilled into my practices by a trio of guys who all had over 40 years with York when I broke in as an apprentice. I guess old habits are hard to break.
Mostly mercury manometer. They don't lie. Or need batteries, or fail to read right in the cold,wet, or hot weather. Hell you can leave one on all night and all the next day and it will still read. There are no sensors or complicated electronic wizardry BS to worry about. I have even used one to check the valid operation of a questionable electronic micron guage. Had to send that one back to Robinair. Use what you like, just know that you can trust it and you feel comfortable using it.
Little stuff, micron guage by robinair or comparable.