Prometeia Mach 2ST - can we still name this as a mod ?!

[piotres]

Hello

A long time ago Symon first asked me about modding his Prometeia Mach 2ST unit which he had had standing in his
house ...not working . Unit was moded sth around 2 years ago - new evaporator with enclosure, R507 refill,
desuperheater added, new suction line, new insulation . Unluckily later unit start to leak somewhere- I don't know
where and when, owner don't know too, but final is that now prommie has difficulties to reach even O*C .

First plan was to mod it for waterchiller but I advised that prommie case is too small to fit big condensor needed
to build good waterchiller (and IMO all cases which are sth like 50 cm long and 25 cm wide are too small to fit
good waterchiller inside them) . So we end up with plan of just "re-modding" old mach 2 ST .

So plan of mod first says about staying stock case, fans, evaporator, and compressor - I plan to change condensor
for bigger one, make longer suction line, mount temperature display etc. ...soon I checked that Unseen's Cube
condensor is WAY too big to fit on stock Mach2 case (this condensor is more than 3 times bigger than stock mach
condensor) . So I've decided that case must be changed too . Luckily I have at home laying from quite long time
Unseen's case . Symon decided that He want "apple green" color of case and some white CCFL inside case (due too in
stock Unseen's case have plexi window) . So I've resprayed it for color "Gelbgrun" RAL6018. I'll add Eliwell EM300
temperature display .

Finaly from stock Mach2ST left ONLY compressor (with oil changed to fresh and capacitor for brand new) ! (remember
first plan was only "moving prommie to life again") LOL .

Specs :

Compressor: Danfoss NL11F
Evap: Jan's evaporator
XV: captube 0.9 mm
Condensor: Unseen's big Cube cooled by Scythe Ultra Kaze 120x38 mm, case dimensions 480 x 225 x 230 mm
Refrigerant : R507
Case : Unseen's case, resprayed to color "Gelbgrun" RAL6018
Others: Revoltec CCFL dual 300mm kit white color, Tt Thunderblade 120x25 mm with RED LEDs on back of case (light can be switched off), Eliwell EM300 controller




Pack which Symon sent me .







I've wait 3 minutes ...and I saw this only (ambient temp 4C) .

so ....







Maybe one day I'll connect those 2 things . But now they're standing on shelf in mine garage.









After some painting work I decide to unmount rest of prommie :





Well, IMO it's not good idea to hold braiding of suction flex line in that way .



This show that prommie's case in fact is too little for any mods ;/ .



This won't be useful anymore .



Looks like capacitor of NL11F had small leak also - will be changed for brand new one.



Oil will be changed for fresh Fuchs Reniso SEZ22.





New braze (with fresh 0.9mm captube) of old Jan's evap - staying from previous prommie mod .





unseen's case have place for gauge - so it'll be mounted of course . I check it for leaks .








Side of condensor are now black - rest will be in "natural" colors .












I stop now because I've run out of silver 40% brazing rods .

With Kindest Regards,
Peter

[ruffus]

looks nice can't wait to see what temps u get as that is a nice size condensor

[imPurpleHaze]

damn very nice mod! I'd really like to see you finishing it!
Keep pushing it!

[tiborrr]

That's a monster! Hell, my cascade doesn't even have that powerhorse! Monsterous!

Keep the pictures rollin'!

[runmc]

Beautiful work Peter You have the Midas touch!!

[EliTE22]

nice work paint looks good
what r u tuning it for?

[sdumper]

Beautiful build....

By the way what brand exhaust fan is that in the picture?

[Unseen]

Heyyy! Thats nice

[piotres]

Tuning will be on 260W dummyload .

Fan on back is Thermaltake Thunderblade 120x25 mm red LED (those fans are not produced anymore, I have it from "old" supply) .

Thanks

Regards
Peter

[SAE]

-subscribed-

I like that build, except that ugly color.

[Jort]

Hey piotres,

I think this was one of the first prommy's i modded few years ago. I dunnow for who it was.

The prommy's i did later where done better but we all learn don't we

Your doing very nice !!

[piotres]

Hey piotres,

I think this was one of the first prommy's i modded few years ago. I dunnow for who it was.

The prommy's i did later where done better but we all learn don't we

Your doing very nice !!

Hi

I have thought it's Your work . Mod of this prommie hadn't been bad except brazing of that braided hose .

You're right we're learning all the time .

Regards
Peter

[Jort]

Hi

I have thought it's Your work . Mod of this prommie hadn't been bad except brazing of that braided hose .

You're right we're learning all the time .

Regards
Peter

hehehe idd

yeah the other mods i did was with a copper piece around the flex, then its mutch stronger. Now the weak place keeps the same.

And brazing Stainless steel wasn't easy with the small torch i had back then.

I sold all my equipment 2 years ago, no time and place anymore.

Your still doing a pritty fine job ! i envy You, i hoped that i build a cascade once but i didn't have the time and the place for it


Good luck !!

[tiborrr]

Any progress Peter?

Regards,
N.

[piotres]

Any progress Peter?

Regards,
N.

Sure . I'll upload pictures later today, or tomorrow.

[piotres]

Hello







Please notice 2 suction line holders .





Even this case isn't still too big .









Fan have switch to turn on/off only red light .



Clear coating as Symon has wanted .

















From first tests it's looking like -31*C@260W and sth like -50*C unloaded .


Regards
Peter

[tiborrr]

These are some great temps considering NL 11F!

Very good job, i like the black sleeving aswell!

[Eldonko]

Nice work man, looks great

[Jack]

Is it an option to attach the Vacuum gauge to the service port while vacuuming? Would that work as well?
I would imagine that then the stress on the vacuum gauge will be al lot less.

[piotres]

Is it an option to attach the Vacuum gauge to the service port while vacuuming? Would that work as well?
I would imagine that then the stress on the vacuum gauge will be al lot less.

where exactly in You opinion ? to manifold aditional port ?

[Jack]

No no, to the serviceport of the compressor.

[piotres]

Hello

Unit is almost finished, left only final test on load before packing and packing :




Final temperature unloaded (unluckily eliwell doesn't show lower than -50C ),



and loaded @260W after 1 hour of testing











Bad news is that now (and during next 2 weeks) I have trully a lot of learning for studies, exam sesion is comming .

Regards
Peter

[Jort]

VEry Nice work peter, proud to see this unit remade

[DistortioniZm]

Wow, beautiful craftsmanship and excellent brazing skill! I totally suck at brazing, but I can arc weld and do almost perfect circles with a plasma cutter

[piotres]

Thanks For me very important is good brazing sticks - for connections danfoss compressors-cooper pipes I use 40% silver brazing rods with flux . For me 3-5% Ag doesn't give nice brazes there. Danfosses' ports are steel and that's problem .