9 1/2 captube is about right if your planning to use .028"
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9 1/2 captube is about right if your planning to use .028"
Only stuff I have is .052 ID Captube. Can you convert it?
that is too large to be used on this type of system.. even if you converted it and used a very long lenth.Quote:
Originally Posted by bh2k
You need some .026", .028", .031", .036", or .039" at the very largest.
hmmm I see. Well I can it at the very earliest probably monday guess I'll have to work up to until I need cap tube.
Made progress and basically worked up until I needed to do the evap and suction line.
http://www.xtremesystems.org/forums/...id=19928&stc=1
http://www.xtremesystems.org/forums/...id=19929&stc=1
Captube is 9 1/2 feet of .028 captube just to test for a start.
sorry dude, its as i thought. you built it wrong. the condensor comes before the phase sep so the hight stage refrigerant can condense. I would suggest not building a autocascade so early.
uhhh...that pipe is the oil sep. The condenser is the phase sep dude. The high stage gas condenses and goes to the bottom where the low stage vapor goes to the top and comes out the top to the phase subcooler.
Hi,
Could you get closer shots of everything, i.e. oil seperator and all the connections to pipes and components. And whats that tube thats lieing horizontal? (not the HX)
Thanks
John.
Lying horizontal is the phase sub cooler. I don't think it has to be verticle does it? I'll take some more now. Im open to any suggestions to make it work better, but this was my first Ideas I had to solve problems. Actually nm I have to step out for a movie, I'll take some when I get back.
yah im pretty sure u have it right.
u forgot to connect up the output of the low stage subcooler, to the condensing inlet of the main HX. that u can do without suction line, cap tube, evap etc. just some quick tubing.
one question, what gas goes through the other part of the low stage subcooler? is it the suction line of the low "stage"?
ok so you are not going to blow yourself up :) . YOu should have a filter dryer at each liquid line not at the outlet of the compressor. Could you post some details ln that condensor it looks like a dual outlet. The phaseseo should be verticle b/c there is probobly not enough space for the liquid to completely fall to the bottom so it wont seperate that well. Also why do you have the cap tube comming out of the condensor? It should come out of the phase sep. Sorry for screaming at u, jsut dont want anyone getting hurt or ruining their equip.
As chilly1 mentioned before, it is OK to put a filter drier at the compressor discharge so that you can filter all the refrigerant with only one drier. The captube coming out of the condenser is likely for the high (first) stage refrigerant which is travelling to the heat exchanger to evaporate. Once again THE CONDENSER IS THE PHASE SEPARATOR! I think bh2k will appreciate my emphasizing this, other people don't seem to get it.
BH2k is the inlet to your condenser at teh bottom? It should be halfway up.
I get all of it ;) Just would like a closer look at the plumbing.
But on the filter dryer, if its important to have it pointing down to get a liquid seal, how does it work in the position its in??
Regards
John.
Thanks guys, I know sometimes I seem like I have no idea what I'm doing, but I have all you here to help so I'm confident in my ability. JSU is correct the inlet to the condenser is a dual and is 2 1/4 pipes inside a 1/2 pipe. I have filters on the discharge before the oil sep. Out of the bottom of the condenser. Finally one will be put after the phase sub cooler to filter out anything in the phase subcooler. I still have to do the oil intake back to the compressor and the overall suction to the compressor. If you've noticed in the pics I did braze access right before the compressor to make up for my service port being used for oil return.
http://www.brainwashstudios.com/stev...edoverview.jpg
http://www.brainwashstudios.com/stev...scade/side.jpg
Finished all the piping and basic assembly today for this thing. Im sure there are leaks everywhere, but I haven't even tryed to charge it as i want to make sure it's all looking good first. Give me some feedback. Coil with captube around it is the temporary evap until I finish mine.
lookin good, cant wait till you get it finish, really, i love your work, you are a real inspiration to me, and probaply many others.
My biggest concern is the ghetto phase-sep/condensor and the homemade oil-sep, but it seems like you know what youre doing.
Im thinking of building something similar to your system, so i am following your work closely ;)
btw, why is it necessary with a device that can control the amount of oil returning to the compressor, shouldnt that happen automatically, so no user input is needed?
good going. i hope ya get an evap soon.
one thing i think you have the HX up side down.
need to evaporate at the bottom of the hx up.
i think thats what i see (last photo)
have you sourced co2 yet.
your making me want to start brazing autocascade.
in the last photo that little red tape is oil return. turn it on few hours to suck oil out back to compresser.Quote:
Originally Posted by floshey
awwww, look at all the little lovehearts on the bench
Why use an oil seperator? The phase seperator would return the oil with the first stage refrigerant anyways.
Your drawing I used had one in it so I made one before anyone said it wasn't necessary ;) Oh well, can't hurt.Quote:
Originally Posted by chilly1
Just a little extra bit of assurance. If anything it will lengthen the life of the cascade, or at least make it 99.999% sure that you wont get oil lodged in the evap.Quote:
Originally Posted by bh2k
yea, and I just realized I didn't hook up the phase sub cooler from the 1st stage suction :doh: oh well one more thing to do. I did a little leak testing anyways just to make everything all good. Can never hurt. Anyone got an idea how much dry nitrogen would cost me to use to pressurize?
Yeah i know that, but it is necessary, shouldnt the oil return by itself? :)Quote:
Originally Posted by kayl
oil will return but i guess ppl unsure weather co2 carriers oil or not, ie clogging captube/evap
will but normally a oil seperator has a float that returns oil automactically.
we do it manually, basically ya putting a path disharge oil sep to suction so only want it open for a short peirod of time untill needed again.