my first Cascade is born :-)

[godmod]

On Fri Jan 27 2006 i decided to build my first cascade!
i bought two nice comps from a friend and a plate hx from egay. the rest is from cold_ice who was and is a great help!

here are the parts that i used:

1st stage:
Mitsubishi RH-421-VH (rotary)
Verflüssiger: 0,88kW
30g Filter/Dryer
evap: PlateHX 4kW
refrigerant: R507
.7mm captube

2nd stage:
Rotary 7200BTU
Condenser: PlateHX 4kW
30g Filter/Dryer
selfmade evap
.7mm captube
refrigerant: R1150

the first idea of how i could arrange it...


the two compressors on the mounting plate


i like playing with CAD...


thats gonna be the evap:


some parts arrived


i'm brazing with propane+oxy, green bottle is nitrogen for purging and pressure testing






















this is the finished cascade, partially insulated, wireing is not done but i only have to connect the cables with the relais...

my cute assistant :P


a psu for the fan controller and for the relais, the right one is an empty psu case, i will put the relais inside it


these are two relais, one is missing (sry 4 quality, cell phone nokia 8800 is cool, but cam is really crappy)


the danfoss kp17, 2nd stage high pressure cut off


desuperheater, 1st stage compressor, some piping and the condensor with 230V fan


left upper corner of pic: here goes the cap into the suction line...
right ... oil sep


insulating was hell!




the front, forgot to rotate the pic CCW


front view


overview...







here is a plan of the electric wireing of the cascade


i had the idea (i know, some did already before i did) of building a box, which is filled with nitrogen, where the mobo is mounted inside, so that i wont have condensate...









i hope you like it, and way more important, i hope i will crack the -100°C with that thing

any questions, tips ... ?

[sl4ck]

Nice work

I hope it cracks the -100ºC too

[piotres]

Nice work, specially that table for mobo is nice inovation

I wish You have better cam

Regards
Peter

[skirms_fr]

looks good

good luck

[Sneil]

Very nice. I have a ways to go before i can build(afford) my first cascade. How much do you figure was your grand total? (without tools)

[Unknown_road]

I hope you mean you braze with propane+oxy and not purge

[runmc]

WOW

Nice Cat

[[XC] MarioMaster]

mmmmm......cascade nice work, quality parts

[ooztuncer]

great work dude (including drawings), but yeah u need a good camera

[epion2985]

Nice work. But dude, drop the ISO on your camera to atleast 200 ><

[krullet]

nice man, to bad with the pics, would like to see it with better quality, but i know how it is, i also just have a tycam

[BlueWonder]

nice work mate. Hope the temp it pulls backs up the effort.

[epion2985]

I dont think its a shiity camera. from the looks of it if his ISO is set prety high. Check what it is set at, if pics will still look like this with it set to 200 then yea its the cam, but that will probbably fix it.

[godmod]

thanks for your comendation!
this is a handycam, i really dont know how to set anything except the nightmode (which is quite worse)...

i just borrowed a digital camera from a friend, i think i will make a small vid where you can see 360° of the cascade... (and maybe the cat )

I hope you mean you braze with propane+oxy and not purge

yes i meant brazing (sometimes i mix some words up )

[Blaster]

looking good

how many plates is that HX ?

[godmod]

it has got 12 plates ~4kW (should be enough)

i edited the wireing plan. here's the new one:

[Fhqwhgads6680]

hey man NICE work, good luck with it....if you have cold_Ice helping you it'll be a success for sure!!! And yeah I think you are rivaling and maybe surpassing Gray mole on the photography front haha Just kidding man, keep up the awesome work!

Brandon J

[godmod]

thanks man! i know, i definately need a digi cam...

[Mr. Popo]

Nice job...
Thats one sexy :banana::banana::banana::banana::banana:... cat...

[godmod]

right now 2nd stage is beeing evacuated.
later on i'll charge the it with propane (just 4 fun)...

i have done a little change at the electrics, i took the one relais out of the 230V circuit, so that the whole control circuit is 12V which is much better!

so here you have some pics...










































yes, yes, yes ... i hate the cam too (send me money, and i will buy a casio exilim ex-s600 ;D)

[Xeon th MG Pony]

nothing wrong with the cam, just whiny people who seem to think we need ultra high clear pics to share builds.

Does the job what more do you need?

[Sub zero]

Looks great my friend

[Unseen]

nice work I like that wood case.

[godmod]

finally i did somthing again

the compressor (l'unite aj5513e, very strong one) got broken (dont know why, but there is a connection between the motor coils and ground... ) .. so i ordered a new one (found a nice rotary on ebay.
last week i got my new rotary. i'm happy with it:





chaos in the workshop :roll:



temp ... refrigerant is R290 yet, in few weeks R404a/R507a

Frozen...


1. the rotary compressor get very hot, but i think thats normal...
2. i mistook the oil-filling-port and the discharge port. is that very bad or is it unimportant?

i had already temps in the range of -55 to -50 but i didnt take a foto (suction pressure ~ -0,3bar to -0,2)


-------------

a few days ago i decided to redo the whole unit. i had a monoblock from ebay, and i took the rotary out of it. i redid all the piping and replaced the filters. i changed the system in both stages from captube to TEV (1st) and CPEV (2nd). i like rotaries, coz threy're smaller, but more powerful than reciproaking piston...

pics without any comment :













































i insulated everything, except the piping where the TEV and CPEV is supposed to be.

[aasmaukr]

Wohoo, nice! Looking forward to see this one working.