Cascade 5 (2 Stage GPU)

This is going to be a very interesting project for sure.
I don’t think anyone has ever done a unit where they can easly remove evap heads without effecting the charge and quickly install other suction lines.
Very interested to see the Ram and Nb line. Is r23 cheaper than 1150 over there. I cant get a hold of r23 here in aus.
No case for this unit, so I take its going to be your own personal cascade. You must have a few cascades now We should see some nice results of hwbot after this beast is finished

Quote:

---

Originally Posted by bazx

this is normally a key feature of any of my builds i like balance

as i need to be able to see what i am trying to do when i look at a build
and understand it myself

infact it helps me alot to post the the work here in order so i can see what to do next if ya get what i am sayin

---

I totaly agree with you there on that Baz

Quote:

---

Originally Posted by bazx

the unit will also have shut off hand valves located on the suction return and cap tube for easy change of evaporators and setups

---

say what :shocked:

cooooooool :cool:

Quote:

---

Originally Posted by kayl

This is going to be a very interesting project for sure.
I don’t think anyone has ever done a unit where they can easly remove evap heads without effecting the charge and quickly install other suction lines.
Very interested to see the Ram and Nb line. Is r23 cheaper than 1150 over there. I cant get a hold of r23 here in aus.
No case for this unit, so I take its going to be your own personal cascade. You must have a few cascades now We should see some nice results of hwbot after this beast is finished

---

it will prob take a few goes to get the best way/mech to get the all the refrigerant out of the evap for removal but i think it can be done

i like r23

it is a very good cascade gas , condenses real easy

just finished up the pipe work for the 1st stage

still need to braze it in

need to clean up my work area first can't think straight anymore

i have made a layout change and swapped the oil sep position for the DSH

this after some thought will give me easier runs when piping the 2nd stage

http://www.benchtec.co.uk/1/cascade5...1/DSC00612.jpg

http://www.benchtec.co.uk/1/cascade5...1/DSC00614.jpg

http://www.benchtec.co.uk/1/cascade5...1/DSC00616.jpg

http://www.benchtec.co.uk/1/cascade5...1/DSC00619.jpg

http://www.benchtec.co.uk/1/cascade5...1/DSC00620.jpg

http://www.benchtec.co.uk/1/cascade5...1/DSC00624.jpg

the copper pipe sizes used in this stage are

1/4 inch used on the expansion valve suction sensor to the suction return
5/16 compressor to the condenser and receiver
3/8 used on the run from the receiver to the expansion valve and HX suction return
1/2 used on the expansion valve to HX

fittings

1x 5/16 straight
1x 5/16 tee
2x 3/8 tee
1x 3/8 elbow
1x 1/2 elbow

2x 3/8 flare nut
1x 1/4 flare nut
1x sevice port


http://www.benchtec.co.uk/1/cascade5...1/DSC00628.jpg

So precise, so clean... :cool: I need to learn from you!

Very rewarding to see such pride taken in ones craftsmanship!

really great work! the pipe work is a wet dream! glad to see someone who is planning their work before action.. just curious, why do you use flare connected filterdrier instead of brazed ones?

but where is the safety device? I hope you will install some one second stage.

regards
Tim

thanks lads

Quote:

---

but where is the safety device? I hope you will install some one second stage.

---

@ tim what safety device would you install on a 1st stage of a cascade?

also have you read the 1st and 2nd posts of this thread?

Beautiful!
Theres not a huge need for safety devices on first stage, on second you need them in case the first fails.
Amazing work tho Bazx, awe inspiring as always. I probably need to get a new pair of pants on after seeing that. On one note though, make sure all your flares are perfect and then some, Runmc had problems a long time ago with having the gauges connected straight to the system due to vibration and I guess shipping, which we've solved by putting cap tube between the gauge and the high or low side. Other then that, I do indeed new pants.

Quote:

---

Originally Posted by n00b 0f l337

Beautiful!
Theres not a huge need for safety devices on first stage, on second you need them in case the first fails.
Amazing work tho Bazx, awe inspiring as always. I probably need to get a new pair of pants on after seeing that. On one note though, make sure all your flares are perfect and then some, Runmc had problems a long time ago with having the gauges connected straight to the system due to vibration and I guess shipping, which we've solved by putting cap tube between the gauge and the high or low side. Other then that, I do indeed new pants.

---

i usually do use cap to join in the gauge and you are correct it would be best

hopefully there will be no hard knocks when i move it to the bench table

Very nice pipe work :)

Just the suction schrader valve seems to be near from the suction line and it can freeze and leak :/

bazx:
yes I have read the first two posts.. in the rush things happend.. sorry my mistake.

as I said before, a excellent work but I would refrain from the flare connections as we are aware of how difficult it is to make them 100% sealed.

regards
Tim

amazing stuff

THat's not the first time he uses flare connections, I think we can trust him about them :)

That's one beautiful rollercoaster of pipes :) I need to get myself some more rounded objects to bend beautiful curves like you do or I need a legit pipe bender.

gomeler:
buy a bending tool, a cheap one cost like 20euro and work surprisingly
good.

regards
Tim

Quote:

---

Originally Posted by Clemmaster

Very nice pipe work :)

Just the suction schrader valve seems to be near from the suction line and it can freeze and leak :/

---

good point

i will make a change thank:)

Quote:

---

Originally Posted by tim-

bazx:
yes I have read the first two posts.. in the rush things happend.. sorry my mistake.

as I said before, a excellent work but I would refrain from the flare connections as we are aware of how difficult it is to make them 100% sealed.

regards
Tim

---

np


you should not fear flare connection if made correctly they are fine

its worth remembering that most commercial air conditioning units use flares

and also desirable for the experimental units i build as the parts are easy to recycle and use again which has saved me money

Quote:

---

Originally Posted by [XC] gomeler

That's one beautiful rollercoaster of pipes :) I need to get myself some more rounded objects to bend beautiful curves like you do or I need a legit pipe bender.

---

its worth the extra few bucks to get a bender

Quote:

---

Originally Posted by before

So precise, so clean... :cool: I need to learn from you!

---

Yea - impress, superb, clean ...


Nice work.

I'm stay to see load temps :)


Martin

If perfection doesn't exist, you have found something very similar :D

This work is awesome!

I can't wait for results