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Three Stage Cascade Build

post #1 of 89
Thread Starter 
Three Stage Cascade Build Log

Compressors arrived...


IMG_00000093_zpsdc70d7c9.jpg

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Base ready with Condenser and wheel mounted.
I also plumbed the Heat Exchanger for the first stage next up is to prep the Condenser (the smaller one on top) for the second and third stages.

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I like to verify that the compressor is in working order as soon as possible so that I can send it off for a replacement if it was damaged...anyway compressor 1 is working fine.

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Little more work on the cascade...

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All that empty space is where my electrical work will go...

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Did some temp wiring to verify second stage plumbing...
Verified: First and Second stage cooling...now on to the third stage.

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Here's some very messy progress photos (with the testing suction and evap)...no clean up at all has been done so it looks sort of ugly but that will change...redface.gif

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Edited by Sdumper - 3/30/14 at 3:58pm
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post #2 of 89
Those are very nice, but next time you may want to checkout the r410a compressors in that size range. They are much more robust, and much more tolerant to the conditions we run in. Ends up using less power, running cooler, being quieter, AND you get the right oil from the get go!
post #3 of 89
Thread Starter 
I was under the impression that the r410 compressors ran really hot. Sounds like I may have heard wrong thanks for the info.

Just a side note: I don't intend to change out the oil r402a(first stage), r23 (second stage) r14/r170 blend (3rd stage).thumb.gif
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post #4 of 89
R402a will be a bit too cold for r23 I think you'll find. You'll end up with a high side pressure that doesn't deliver enough massflow. Same issue with r1150 into r14.
Might want to try 507 or even 134.

R410a in R410a compressors run very hot. Not R410a in them makes em purr.
post #5 of 89
You'll still need to change the oil in stage 3 with r14 even with the r170 in there. Patrick showed us that as well. Just the oil carriage isnt enough, oil creep and logging in the hx and evap becomes a pain.
R290 can at least be condensed out in a desuperheater with the oil before the oil separator. Try Zerol 150.
post #6 of 89
Thread Starter 
Bought a gallon of Zerol 150 awhile back for a commercial project and love how it holds up for extended cooling great stuff.
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post #7 of 89
Absolutely, if getting new into the compressor is too hard, it plays nice with AB. So fill the oil sep with the Zerol.
post #8 of 89
Thread Starter 
Base ready with Condenser and wheel mounted.
I also plumbed the Heat Exchanger for the first stage next up is to prep the Condenser (the smaller one on top) for the second and third stages.




My System
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CPUMotherboardGraphicsGraphics
i5 2500k Biostar TZ77XE4 6950 6950 
RAMHard DriveCoolingOS
8gb - DDR3 main: 120gb SSD 830 + 3 1tb drives Air Win7 
MonitorPowerCase
3 x DELL ST242OL  OCZ 900W Lian-Li Custom 
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My System
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CPUMotherboardGraphicsGraphics
i5 2500k Biostar TZ77XE4 6950 6950 
RAMHard DriveCoolingOS
8gb - DDR3 main: 120gb SSD 830 + 3 1tb drives Air Win7 
MonitorPowerCase
3 x DELL ST242OL  OCZ 900W Lian-Li Custom 
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post #9 of 89
Looks like a good start and a nice metal base? Nice to see for sure.
30 plate seems about the right size as well. Unless you'd like to try out a 12x5 thumb.gifwink.gif
post #10 of 89
Thread Starter 
Thats what I was thinking a 30 plate should work a little better than a 20. Still planning to use a 10 plate for 2nd/3rd...
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3 x DELL ST242OL  OCZ 900W Lian-Li Custom 
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My System
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CPUMotherboardGraphicsGraphics
i5 2500k Biostar TZ77XE4 6950 6950 
RAMHard DriveCoolingOS
8gb - DDR3 main: 120gb SSD 830 + 3 1tb drives Air Win7 
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3 x DELL ST242OL  OCZ 900W Lian-Li Custom 
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