Hey Guys, Iv an old York Centrif on R11, We need to recover the Refrigerant from it to fix a few things before summer here..
Iv never reclaimed R11 before, whats involved? Iv heard about pushing liquid out with Dry nitrogen..?
cheers
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Hey Guys, Iv an old York Centrif on R11, We need to recover the Refrigerant from it to fix a few things before summer here..
Iv never reclaimed R11 before, whats involved? Iv heard about pushing liquid out with Dry nitrogen..?
cheers
hi, yes I seem to remember , making a cold trap to condence the R11 to pour it back in a drum < condence at 58f<
No expert myself but found this which has a couple of diagrams.
http://www.asada.co.jp/english/seihin/furon/1_07.html
Pressurize with nitrogen and it will flow in to drum BUT remember not to pressurize to high or you will rupture bursting disc bout 10lbs psi should be enoughQuote:
Originally Posted by licencetochill
Toosh is right, pressurise with nitro but not too much that it ruptures the bursting disc.
Attach some 3/4 soft copper or a decent size hose to the bottom of the condenser & drain off into some large clean oil-type drums, fill each no more than 3/4 full & store in a cool area.
You sure it's R11 & not R123 ??..
Cheers Guys, Its def R11.. we still have a few machines on it.
Was onto it about the bursting disc, Iv been warned!
Here is a little tip when you leak test with r11 run a 1/4 inch line from bursting disc outlet back to cooler it equalizes so you can increase pressure to leak teat without losing bursting disc
R11 recovery is no different than any other refrigerant, just a bit more volume.
If you have some low pressure recovery cylinders or storage cylinders it is much easier.
Adding nitrogen to push out liquid is one (old) way to do it. You can do a push pull even with drums but it is easier with cylinders that you can bottom fill and pull vapor off the top.
Pipe the discharge of the recovery unit (typically a large vacuum pump set up for recovery) back into the condenser and it is amazing how quickly you get the liquid out (block the condenser on the recovery unit so you dont condense the refrigerant be pushed back in). Switch over to vapor recovery and get the last of it out. Break vacuum with nitrogen.
Make sure that you don't freeze and break the condenser or evap when you get down to 16" of vacuum or deeper. (keep flow on or drain the vessels.
Good luck!