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 ... ?