Is this cascade setup diagram correct?

[[SLC]Tachyon]

http://boards.slackercentral.com/user/Tachyon/cascade.JPG

Am I understanding this correctly (after doing some quick reading I seem to think I understand how a cascade ought to be set up)? are the correct components listed on here? anything missing? would this work?

TIA

[FUGGER]

Looks off to me, I would use the 134a compressor to cool the 502 with a water condensor converted for the 134a to work as a evaporator.

cap tube goes to the evap head.

[ellsworth]

what you have marked as capilary tube on an expantion valve isnt actually capilary tube. the tube is meant to carry the pressure from the temperture sensing bulb (what you have marked as cap strainer) to the valve itself. the bulb should be mounted on the suction line of the evap itself so the expantion valve can measure how much refrigerant to let in based on the needs of the heatload, this is called superheat.

[[SLC]Tachyon]

Learning every day! :D

Time to revise the diagram in MSpaint... :p:

[Gary Lloyd]

Start here:

http://www.refrigerationbasics.com

Don't even think about a cascade until you have successfully built a single stage system. They can be extremely dangerous.

[Gary Lloyd]

Nobody ever listens, but I'll say it anyway. If you do it wrong, you are building a bomb. Cascades can kill you.

[afireinside]

I'm assuming the high pressure of the more powerful refrigerent could just explode if theres a leak?

[JCviggen]

Originally posted by afireinside
I'm assuming the high pressure of the more powerful refrigerent could just explode if theres a leak?

a leak wouldnt be that bad, if a huge pressure builds up it'll prolly blow up rather than leak

[Gary Lloyd]

A cascade system is most dangerous when it is off. That's when you will find computer parts on your neighbor's lawn.

Take it a step at a time. Learn all you can before you even think about building any system. Do your homework.

I would highly recommend that everyone start with a chiller made from a window A/C or dehumidifier. Then install a piercing (aka tap) valve in the process tube, put on your guages and learn to work with refrigerants. Then replace the cap tube, evacuate and charge the system, and learn how to fine tune it (which involves a hell of a lot more than just adjusting the charge). Then replace the chiller evaporator with a direct die evaporator.

Then start to learn about cascades.

Its not about the destination, its about the journey.

[afireinside]

A cascade system is most dangerous when it is off. That's when you will find computer parts on your neighbor's lawn.

:ROTF:

I'm starting with a chiller :D I'm that stupid kid from phase-change.com who asks way to many stupid questions :p But I'd rather not mess with it after its done. I'd rater build from scratch because I'm crazy, stupid and have financial backing (to an extent) on this stuff :D

[Gary Lloyd]

Want to build from scratch? Get a window shaker, disassemble it an then reassemble it. Let us know how it works out.

Got financial backing? Buy my ACR Trouble Shooting book. It will be your most important tool. :D

[afireinside]

Window shaker=?

I'd buy your books but financial backing doesen't exactly cover 80 dollar books ;)

[[SLC]Tachyon]

Don't worry, not even going to come close to going cascade until I'm well traversed with my single-stage setup awaiting an evap and a R404 charge. :cool:

[Gary Lloyd]

Window shaker=?


Refrigeration slang for window A/C. :D