2-Stager unit

[before]

1st stage

• Compressor: LG NP407P (25,000Btu/h; 40.7cc/rev)
• Condenser: 1.9kW + Fan
• HSP Service Valve: Schrader
• HSP Manometer: Wigam ML60/18C4FA/A8
• Reciever: Frigomec 1.6l + Alco rotalock valve SR1-WDB
• Filterdrier: Copper 50gr
• Expansion Device: Alco TXV TI-SW (w/ TIO-01)
• Heat Exchanger: Harle compact brazed plate HX B3-12A (12pl)
• LSP Service Valve: Schrader
• LSP Manometer: Wigam ML60/38C4FA/A8
• Refrigerant: R404a

2nd stage

• Compressor: LG NP362P (21,900Btu/h; 36.2cc/rev)
• Oil Separator: ShineYear Automatic
• HSP Service Valve: Schrader
• HSP Manometer: Wigam ML60/18C4FA/A8
• Filterdrier: Copper 50gr
• Expansion Device: Honeywell CPEV AEL1
• LSP Service Valve: Schrader
• LSP Manometer: Wigam ML60/38C4FA/A8
• Refrigerant: R1150 or R1150/R50/R290 blended
• Others: Desuperheater + Fan, Cold_ice's Evap + succion line, and of course something for safety.

Today, I've painted the condenser in blue and brazed few things as well.

















More to come.

[Polizei]

Looks good so far. Specs?

[Jack]

Those compressors look fat

[TopherTony]

Looks to be a couple LG NP362P 220V 50Hz R407C Compressors

Cooling Capacity 50/60 Hz
Btu/hr : 21800/22000
Watts : 6388/6447

Motor Input
Watts : 2096/2135

Second to last on the page

[kayl]

nice work before, i see another killer cascade in the making

[4Qman]

A remarkable improvement on cosmetics to the 3 stager mate. Your enjoying these builds arnt you. hehe

[n00b 0f l337]

Those are some massive compressors indeed.

[before]

Thanks guys

Specifications of the unit.

1st stage
LG NP407P (23,400Btu/h; 40.7cc/rev)
1.9kW condenser + Fan
Schrader HSP
Wigam ML60/18C4FA/A8 gauge
Frigomec 1.6l reciever + Alco rotalock valve SR1-WDB
Copper filterdrier 50gr
Alco TXV TI-SW (w/ TIO-01)
Harle compact brazed plate HX B3-12A (12pl)
Schrader LSP
Wigam ML60/38C4FA/A8 gauge
R290 or R404a

2nd stage
LG NP362P (21,800Btu/h; 37.2cc/rev)
Desuperheater + Fan
ShineYear automatic oil separator
Schrader HSP
Wigam ML60/18C4FA/A8 gauge
Copper filterdrier 50gr
Honeywell CPEV AEL1
Cold_ice's Evap + succion line
2 * Schrader LSP
Wigam ML60/38C4FA/A8 gauge
R1150 or R1150/R50/R290 blended
(and of course something for safety)

[Unseen]

nice start before

can you please post a pic from the Harle compact brazed plate HX B3-12A (12pl)?

thanks

[before]

Thx

Here's the HX. Dunno if flaring is a good option but I want to try it instead of brazing.



Cascade as it looks today:

[4Qman]

Very good Before,. Nice size Desuperheater there man.

[n00b 0f l337]

Looking good! Nice condensers!

[gosmeyer]

We all know you will get the results your after.
Time to braze.

[kayl]

thats going to a beast when its running. How come you didnt want to braze the plate HX? i personally like to have as many joins brazed.

[TopherTony]

maybe because a brazed plate hx is kind of messy looking, where as a flare will keep it looking neat

[before]

Thank you guys

maybe because a brazed plate hx is kind of messy looking, where as a flare will keep it looking neat

Right It will save some silver as well BTW because of space constraints, it might be required to braze pipes...

In fact, space is difficult to use now; the unit is very compact. It more and more looks like a tower.

ATM I'm hesitating about the way to connect the HX... As an Evaporator? Or a Condenser? Does it really matter? The one installed between 1st and 2nd stages of my 3 stager is connected as a condenser and it works fairly good. In fact, I think the HX is still an evaporator for the high stage and a condenser for the low one. BTW actual HX has 2 different sizes for the connections while the other having 4 equivalent connections...

[Moc]

Connect it like its drawed at the second picture. "Refrigerant"= First Stage
"Water"= Second Stage.

[TopherTony]

either way will work. i dont see a benefit from one over the other in the long run. Basically all you are doing is switching the sides?

Make sure that the low stage inlet is on the bottom because when it is evaporating the vapor has to rise. The highstage will be condensing so it's inlet will have to be on the top connection so when it condenses, the liquid will the flow downward. If you do it the opposite way, it wont work correctly.

[n00b 0f l337]

Evap lower stage liquid in the bottom and then out the top, and then with gravity the gaseous upper stage goes from top to bottom and condenses

[Clemmaster]

1st stage on the 2 big connector (inlet at the bottom, outlet at the top) and second one on the others (inlet a the top)

[Moc]

I think enough people said that now ...

[before]

@all: Thank you

@Clem: You're right...

My question was a bit stupid as first stage refrigerant needs to go from bottom to top (liquid to gaz) while second stage refrigerant needing to go from top to bottom (gaz to liquid)... Additionaly, tighter connections are obviously to be used for high side pressure. Contrarily, larger connections are to be used for low side pressure.

Shame on me for not thinking before writing.

[jinu117]

Nice going before What other cascades did you make? I am having not so easy time finding it Yup... I've been out of loop for too long :P
Looking forward to the monster result... 2hp eh? (cringe)

[before]

Here's my 3 stager mate A bit ugly but powerful... http://www.xtremesystems.org/forums/...d.php?t=153348

Actual cascade has clearly a better looking and good power as well... not 2hp but about 6hp; and both compressors have about 40cc/rev displacement.

CPEV has been brazed to captube side and liquid line from HX is ready for brazing.

[piotres]

Looks for sure better than 3 stager ..way better .

Only condensor is bit "life tired" I think hehe .

Rotaries are ... monsterous .

What TXV + what nozzle You use ?

Waiting to see good temps mine friend .

Regards
Peter