water chiller in a day

[Xeon th MG Pony]

hey hey i knew this would happen you guys can leave it can you alway saying no thats not right..
question do you know why a vac pump has oil in it? oh and as i said at the start i'll do it how choose......... i said that i did not want posts like yours here

I'm a certified technician so I know a hell of allot better why they do then you will! and by the very post it appears you don't know why at all.

FYI: The oil is NOT there to "Catch the crap" It is to lubricate and to mechanically seal the veins, this is why clean oil is paramount to efficient vacuum pump as dirt will cause the van to not totally seal thus reducing the strength of the vacuum. Vacuum pumps do not rely on valves reed or other wise, they rely on a constant rotation & oil seal. Idealy nothing will be caught in our oil!

Simply put the vacuums main purpose is to remove moisture & Air, running mineral oil you will have moisture tolerance ie no acidic oil, but you'll have your expansion device freezing up all the time and the system will fail.

I don't bs I just give the facts straight up, you won't get sugar coating with this pony!

[Xeon th MG Pony]

yeah problly but like i said it works and im not going to pay £160 for a proper vac my way worked
i did do the boil test with a jam jar and shrader it did boil a bit out
i dont care any more it works so im happy
i just wanted people to be like well done and thats great not critasising cause i dont have a hvac certificut and with spelling like that<---- why would they lol give me one
also advice is nice but there is better ways to put it in text
peace out im going to go play chilled water.....

You want it to work good then you need the right tools, I would say nothing about a cert, all it is a piece of paper worthless in its own right, what matters is how you do it. No cert needed so long as you play by the proper rules and use good procedure. As such will ensure a good working reliable safe system.

If you do not want constructive criticism and just want praise plenty of newb sites that don't know any better will do that!

I assume you come here to learn and as such I offer what cost me 5 years + 10,000 dollars to learn, you learn getting criticism.

[Xeon th MG Pony]

yep did that will keep an eye on ebay.

hey guys right i had a sleep now, my head is clear 1st off just wanted to say my sorrys to detroitAC and Xeon th MG Pony my be i was wrong but the unit is working to a fashtion no malace intended

ok right this is what i think you guys are here for....help
i have found a design floor's
1. 12v pc fans are gay @ 10v(and can any one recommend ether 240v fan or good 12v i can run off a transformer?

2.the unit takes an age to freze up the water around the evap
i.m thinking may be the evap is to large interanally

3.water cooling rad not so good for condencer

and nol you were right in saying about the suction line not being frosted well even with a good charge it wont frost but when i built this unit i did not sub cool the cap tube and hence no liqued @ evap just gas i have now droped the cap tube in the water next to the evap and its frosing the suction line

right i want your guys recommendtions
longer cap? subcool the cap around the suction or just smash it up and say well it was fun for a day lol

i just read this post and it makes no sence so hope you can work it out lol

Accepted, Sorry for being blunt, just the way I communicate it is not intended to be mean or insulting, just take it at face value.

2 - A weak solution of sodium hydroxide will eat away the aluminium fins on the evap nicely. Your evap is fine, it is the cap tube length or mor likely some moisture in the system is freezing and reducing your capacity. We want our evap large in volume and surface area!

3 - No, no it wouldn't be very good for a chiller this size, you want at least a 6,000btu condenser (Remember a hermetic compressor will be adding 30% of its own load on the condensor!)

What to do?
I'd immagin if you can get your self a cheap R-12 tvx from ebay of the 1/4Ton range will make your life way easier for charging and load handling, if not then wait till you have a vac pump that can pull down to 500 microns, (A good vac makes all the dif in the world!).

I'd start with a larger condensor first off. Secondaly what are you going for? Fast pull down or ultimate acheived temp? You can have one or the other but not both! unles you have a TXV it can give both!

[DetroitAC]

(oh and i dont want any posts with You can't do it like that)
well i have to say i.am doing it like that i mean its not like its rocket since lol

I think EvoCarlos has made it clear in his first post that he doesn't want this kind of argument. I've had some things I wanted to warn him about, but I've respected his request to not post that in this thread. (pretty sure you meant rocket science, right?)

IMO if you ask in the first post for no criticism, that's what you should get ( a few reminders may be necessary since not everyone reads an entire thread). No criticism, even if it's constructive, even if if you think your input will help him. I don't think EvoCarlos should need to hunt for a new forum, he should be able to post his build here as long as he stays within forum rules and good taste.

[EvoCarlos]

Accepted, Sorry for being blunt, just the way I communicate it is not intended to be mean or insulting, just take it at face value.

2 - A weak solution of sodium hydroxide will eat away the aluminium fins on the evap nicely. Your evap is fine, it is the cap tube length or mor likely some moisture in the system is freezing and reducing your capacity. We want our evap large in volume and surface area!

3 - No, no it wouldn't be very good for a chiller this size, you want at least a 6,000btu condenser (Remember a hermetic compressor will be adding 30% of its own load on the condensor!)

What to do?
I'd immagin if you can get your self a cheap R-12 tvx from ebay of the 1/4Ton range will make your life way easier for charging and load handling, if not then wait till you have a vac pump that can pull down to 500 microns, (A good vac makes all the dif in the world!).

I'd start with a larger condensor first off. Secondaly what are you going for? Fast pull down or ultimate acheived temp? You can have one or the other but not both! unles you have a TXV it can give both!

hey yeah i relazed that a few post back and i must of over recactided
re:2. i have now modifided the unit to get betterrrr performance well try lol had a real big problem i'll tell ferther down,
i will keep an eye out for txv but £££ is the problem atm lol
re 3. i have a large condencer here to uses now certaesy of Postal dude and a big thanks to him
re what i want form this unit will as i have the controler i would like it to pull down fast and then off @ a set temp with the pc using the temp from water thats chill'd
aaaaaaaaarrrrrrrrrrrrr i need vac pump my air commpressor is dying very slowlly its 8 years old and its shaged lol may invest one day

I think EvoCarlos has made it clear in his first post that he doesn't want this kind of argument. I've had some things I wanted to warn him about, but I've respected his request to not post that in this thread. (pretty sure you meant rocket science, right?)

IMO if you ask in the first post for no criticism, that's what you should get ( a few reminders may be necessary since not everyone reads an entire thread). No criticism, even if it's constructive, even if if you think your input will help him. I don't think EvoCarlos should need to hunt for a new forum, he should be able to post his build here as long as he stays within forum rules and good taste.

hey detroit i dont mind if you want to say it can go here i was just a bit moody when i put i dont want that kind of post lol

also on another note as i have only realy got in to phaze just these last 2 months or so and the 1st bit i did was just repairing a vapo ls that was a bit messed up this chiller was my learning curve to phaze and i have learnt alot and have solve a few problems myslef in the process oh and my brazing skillz are uber leet now just need to get my oxy/acc bottles for speed brazing lol

right on to what i was doing to day project fxxxxx shh not yet
this monring i evac'd the chiller and removed the water rad condencer and added a 2nd on top so now i have 2 linked i remove the water rad from the water box as it made no diffrence what so ever i have now move the water flow in to the water box and improvemnts were made
but i vac'd it down and pured it with propain/butain to flush out the moisture then gas'd it up to 30psig thru the hi side started it up and gas it to running pressures but low and behold 5mins was all i got out if it

then total loss of everything pressures stuck no flow from hi to low when off so to night evc'd it again and unbrazed it all testing all the pipes were clear with propain as it was to hand the cap was clear the condecer was clear but the filter was full absolutilly blocked. F%$K it i shouted and got my hair off with it for 10seconds but where had all this crap come from well it was from the 2nd water rad i had added it was full of limescale i did purge while brazing but this did not help lol
i taped the filter on the bench for 5mins and got all the limescale dust out put it all back together and tri vac'd it for 40mins gas'd it up with 507
now with the evap in air it got to -40 and run for 2 1/2 hours with no problems just trying to get the charge right now

me have i realy wrote this much damn i should of just said it broke but now its fixd lol

[Xeon th MG Pony]

if you want fast pull down a short cap tube will give you an expedient one but your ultimate low temp will suffer for it. Excellent to hear about the condensor congrates!

right now with the strength of the pound you aut to be able to score one nie a quid on the US ebay. Sounds like you may need a new filter/drier or at least recomend one as such.

[drbhatti]

brilliant work, in a day! whodve thunk it?!

[EvoCarlos]

if you want fast pull down a short cap tube will give you an expedient one but your ultimate low temp will suffer for it. Excellent to hear about the condensor congrates!

right now with the strength of the pound you aut to be able to score one nie a quid on the US ebay. Sounds like you may need a new filter/drier or at least recomend one as such.

i'll defo keep an eye out for a vac of some discription
i was going to change the filter but it seams to be working fine now i do have a new one but i have no 1/8 pipe to reduse it to cap tube lol

brilliant work, in a day! whodve thunk it?!

cheers bud i playing with it now seeing what affects the runing and other stuff lol

so the cap tube has been shortend by 7" and the evap i made is 2ft shorter now and coiled close then soft solderd to help transfer the temp thru the hole coil so pics for you to look @ and ponder @
this ones b4 evap mod



dirty pipe the soft solder would not stick lol

4mins its getting there filter down hill

10mins gone by and it a big ol lump o ice filter up hill it works better on this application

[Postal Dude]

Lookin good mate!
Use some of your halfrauds antifreeze to see how cold you can get liquid.As soon as you get ice on the evap it insulates it, ruining heat transfer.With antifreeze in there the liquid temp will get alot lower.

[EvoCarlos]

Lookin good mate!
Use some of your halfrauds antifreeze to see how cold you can get liquid.As soon as you get ice on the evap it insulates it, ruining heat transfer.With antifreeze in there the liquid temp will get alot lower.

with the anit frez it take ages to chill down so ivw made a weak mixture it gets a bit o ice on the evap which helps cool the water down faster 4l of water/af mix 20mins to -10 with the water flowing over the evap still room for improvemt but cba as i used my last silver solder on ur chiller so go to wait till tomorow to get some then im going to fit that big ass condencer yeah!!!!!

[Postal Dude]

i'v got the fan here for that too when we get together next. It should fit right over the top of it

Big ass condenser. Good gas. Tiny little efficient evap. I think its gonna pull down nice