Wip : Single stage

[Foamy]

Hi folks,
After my single stage practise unit i thought it was time to make something worthy to use :D With some luck i found a free and useable coolgroup. It had some nice components in it and all they needed was some refurb loving:hump::eleph:

Here are some pics to start with

The victim
http://img23.imageshack.us/img23/5307/dsc01546hg.th.jpg (http://img23.imageshack.us/i/dsc01546hg.jpg/)
Trading old for new
http://img10.imageshack.us/img10/9414/dsc01547t.th.jpg (http://img10.imageshack.us/i/dsc01547t.jpg/)
Made proces, paintjob
http://img8.imageshack.us/img8/6140/dsc01551p.th.jpg (http://img8.imageshack.us/i/dsc01551p.jpg/)

The compressor is a pretty strong Uniti hermetique CAE9460T.
I wil update this now and then while more has been done :D

[Buckeye]

WoW nice find there :up:

That thing is just begging to be made into a SS unit :clap:

[MeltedDuron]

My god the speed that your moving on with this!! Looks gash but a nice find untill i saw the paint job and looks new again. Keep up the amazing work. You've gotten the skills now and by the looks the eye for detial to go with it!

[clear cmos]

The compressor is a pretty strong Uniti hermetique CAE9460T.


that is to say l'unite hermetique.....

[SexyMF]

They are noisy compressors.

[Foamy]

I have question concerning compressor connection,

http://img6.imageshack.us/img6/1420/pcicomp.th.jpg (http://img6.imageshack.us/i/pcicomp.jpg/)

How do i connect properly?

3 wires 1phase 220V, 2 capacitors, 1 running and 1 start capacitor..

*-edit*
This problem has been solved, motor up and running!

[Foamy]

A bit more work has been done :D

Overall look without fanhouse
http://img253.imageshack.us/img253/6080/dsc01577t.th.jpg (http://img253.imageshack.us/i/dsc01577t.jpg/)

New vibrationpads underneath the compressor, the old ones were really grannystyle
http://img16.imageshack.us/img16/9650/dsc01578pb.th.jpg (http://img16.imageshack.us/i/dsc01578pb.jpg/)

Any comments on the de-superheater coil?
The suction lenght?
I'm going to take 2.4M cappilair

[clear cmos]

my opinion is better placed desuperheater vertically, length of the suction line & capilary tube is only a matter of taste :p:

[sdumper]

A bit more work has been done :D

Overall look without fanhouse
http://img253.imageshack.us/img253/6080/dsc01577t.th.jpg (http://img253.imageshack.us/i/dsc01577t.jpg/)

New vibrationpads underneath the compressor, the old ones were really grannystyle
http://img16.imageshack.us/img16/9650/dsc01578pb.th.jpg (http://img16.imageshack.us/i/dsc01578pb.jpg/)

Any comments on the de-superheater coil?
The suction lenght?
I'm going to take 2.4M cappilair

Desuper is a little long for a large compressor you really only need 1 or 2 coils for vibration.

[MeltedDuron]

DSHC is fine. it'll stop the vibes and add a bit more cooling

[SexyMF]

DSHC is not necessary for a single-stage system. You only need 2 or 3 large loops to dampen the vibration from the compressor onto the condenser joint.

Also, your compressor will run either way you wired it but won't run for long if you have the start and run caps switched. What values of capacitor did you use for each winding?

[Foamy]

DSHC is not necessary for a single-stage system. You only need 2 or 3 large loops to dampen the vibration from the compressor onto the condenser joint.

Also, your compressor will run either way you wired it but won't run for long if you have the start and run caps switched. What values of capacitor did you use for each winding?

I have connected it the right way now :) long live the manual :D
original capacitors btw

[Foamy]

Yesterday first test of the system .

Learned allot :D

it seems that evap design is really important , while gassing the system and starting it, temps were dropping very very fast to -40, once the system was filled temps dropped back to a loazy -25°c within secs...i was scratching my head, how could this be possible???

-->evap
I made a custom test evap at work , but it has no canals and the capilair lays next to the suction line, in other words , it goes in and gets sucked away before it even makes change to evaporate lol.

Anyhow, a decent evap wil be made so we can test again.

System was filled with R417A

[SexyMF]

Give us more details. What are you pressures when you have finished charging? It sounds like you don't have enough volume in the evaporators and the low side pressure is to high.

How did you determine the total charge?

[Foamy]

a little late update lol,
did some finalizing on the unit, insulated the evap added mounting plate S1366 only .:D
I really used some ghetto stuff for this, inox plate and housing from a standard motor, placed the evap in it, a little PU mousse and done deal :-)
Getting idle around -58°/-60 Working on load tester now . Already done some overkill testing with airheater wich produces 2000W or max 300°c :rolleyes:

Stil on R410a btw :)

http://www.madshrimps.be/vbulletin/attachments/f9/2980d1256462000-wip-ss-dsc01615.jpg
http://www.madshrimps.be/vbulletin/attachments/f9/2981d1256462000-wip-ss-dsc01614.jpg

[SexyMF]

Images are broken for me.

I've found that an airheater doesn't put much load on an evap. I'm guessing that air->copper transfer is poor, coupled with the layer of watery ice on the evap that acts as a good insulator.

Final tuning is better served on the actual CPU. Not to mention is looks cool having bottles and guages attached to the computer :)

[Foamy]

Fixed the images :)
http://img44.imageshack.us/img44/9935/dsc01615v.th.jpg (http://img44.imageshack.us/i/dsc01615v.jpg/)
http://img33.imageshack.us/img33/7085/dsc01614cy.th.jpg (http://img33.imageshack.us/i/dsc01614cy.jpg/)
http://img44.imageshack.us/img44/2894/dsc01629j.jpg (http://img44.imageshack.us/i/dsc01629j.jpg/) http://img44.imageshack.us/img44/dsc01629j.jpg/1/w768.png (http://g.imageshack.us/img44/dsc01629j.jpg/1/)

So i had R410a charged, i recharged the system with R507, temps are temps at idle but when when loading it it completely fails :D 250W btw. I guess it's the 9feet .028 capilair that is holding me back.

[sdumper]

Or your pressure is too low...

[Foamy]

Or your pressure is too low...

Hmm sorry m8 but i'm noob, could you explain wich side and how to resolve, or how i should notice this?

I always charge untill a few inches of the compressor is not frozen and my low side at 0 bar .

[sdumper]

Hmm sorry m8 but i'm noob, could you explain wich side and how to resolve, or how i should notice this?

I always charge untill a few inches of the compressor is not frozen and my low side at 0 bar .


Hook up your red hose to your high side the side coming "Out" of the condenser often located on the filter drier...
.
Hook up your blue hose to the low side often the service port on your compressor.


Whats your loaded pressure on the red hose gauge under load?
Also whats the temp of your suction line 2 to 4 inches up from your compressor under load?

If your pressure is above 225 psi and your not holding load then I would trim down to 8 feet and try again.

[Foamy]

Hook up your red hose to your high side the side coming "Out" of the condenser often located on the filter drier...
.
Hook up your blue hose to the low side often the service port on your compressor.


Whats your loaded pressure on the red hose gauge under load?
Also whats the temp of your suction line 2 to 4 inches up from your compressor under load?

If your pressure is above 225 psi and your not holding load then I would trim down to 8 feet and try again.
Was going to test this but in idle my low side was in vaccum and my highside around 150psi, a bit undercharged so i didn't bother to put load on it.
i'm going to swap my custom evap and suction line with a prefab from piotres or duniek . .036capilair with 10feet to start with. I really need this system to hold 250w steady at -35°c if possible.

[sdumper]

Was going to test this but in idle my low side was in vaccum and my highside around 150psi, a bit undercharged so i didn't bother to put load on it.
i'm going to swap my custom evap and suction line with a prefab from piotres or duniek . .036capilair with 10feet to start with. I really need this system to hold 250w steady at -35°c if possible.

Sounds good

[quintus]

Maybe if it's getting colder then you will have 250watt at -35, your compressor is not that strong;)

From your presures is clear that you didn't charge it with enought freon, also 9feet of .028 is too much for 250watt! According to Gary's forumula you need 5feet for 225watt. 5 feet is the minimum recommended so go for 6feet and try your luck. Or best wait for a custom lfex line/evap/ cap line from some1 with more experience.

Make yourself a variable dummy heat load.

I would keep in mind that the compressor doesn't performe like it was brand new.

[Foamy]

Maybe if it's getting colder then you will have 250watt at -35, your compressor is not that strong;)

From your presures is clear that you didn't charge it with enought freon, also 9feet of .028 is too much for 250watt! According to Gary's forumula you need 5feet for 225watt. 5 feet is the minimum recommended so go for 6feet and try your luck. Or best wait for a custom lfex line/evap/ cap line from some1 with more experience.

Make yourself a variable dummy heat load.

I would keep in mind that the compressor doesn't performe like it was brand new.

my compressor is comparable with nl11f ,slighty stronger.

[sdumper]

Whats the compressor rated at and what is the hp?
I dont see it posted...

[Foamy]

Whats the compressor rated at and what is the hp?
I dont see it posted...

1/2 Hp 11.XX cm³ more specific charts i have to search for that

[Foamy]

Ok i trimmed down the capilair to 6feet, thats 3feet off from previous lenght.
It seems that i have significant improvement but now is my question, when do you stop with charging?
My high side pressure is arround 170psi and i'm just working around 0bar to a bit of vaccum.

[n00b 0f l337]

That was a very drastic change, I know your anxious to get to results, but you should trim around 10cm at a time (4 inches).

[Foamy]

That was a very drastic change, I know your anxious to get to results, but you should trim around 10cm at a time (4 inches).

i was using .028 9feet -->at 250watt load it's a no go

[n00b 0f l337]

As you get into the range your at now though, you risk not having enough capillary to cool with the suction return.

[Foamy]

As you get into the range your at now though, you risk not having enough capillary to cool with the suction return.

Hmm explain?
At the moment it hovers around -28°c at 250w.

[SexyMF]

Insulate up a motherboard and give us a look into a how this performs on a CPU. Don't get hung up on load testers.

[quintus]

If the new guys getting in making their own ss would make a variable load tester and read a bit, especially Gary's formula...

[Foamy]

Insulate up a motherboard and give us a look into a how this performs on a CPU. Don't get hung up on load testers.

Wil have to find some stuff first then to test on :D