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Well... we can try the cap tube pinch strategy, but keep in mind that it is difficult to unpinch the tube. I would want to use something that gives us a precision pinch. Maybe something like a small vise, so that we can pinch it very gradually.
The condenser is big enough to take the resulting liquid backing up into it (from the overcharge), so that shouldn't be a problem.
I actually have a small vise and it is sitting next to the system in the basement for tommorrow!
From pinching it what kinda gain can be expected?
And can someone please explain to me exactly how that works? I understand it creates some sort of backup..but i don't understand how that can create "more" evaporation or colder temps from the evaporation.
I think i am gonna use Jamal's idea of putting something in there to take alot of room up so i can use less fluid..less coolant shoudl equal colder temps shouldn;t it..i mean then the evap has less to cool and can get what is there cooler.
Any other ideas?
Looking back at your post, I see that you said -4F (-20C), not -4C. Okay, I'll buy that. :DQuote:
What dont you believe about the new thermometer? Do you think it is lower or higher then that?
And I recommend that you calibrate your old thermometer to match the new one.
lol....yea...-30F is my goal now i guess
I try to avoid making predictions, as there is a crack in my crystal ball.Quote:
From pinching it what kinda gain can be expected?
lol...well instead of a prediction..is there an educated guess that can be made?Quote:
Originally posted by Gary Lloyd
I try to avoid making predictions, as there is a crack in my crystal ball.
While we are pinching the cap tube, we need to monitor the coolant temp and the suction line temp a few inches from the compressor.
My SWAG (Scientific Wild Assed Guess) is -40C.
Sorry for my noobness, but what kinda monitoring should i do..is there anything in specific i should watch for?Quote:
Originally posted by Gary Lloyd
While we are pinching the cap tube, we need to monitor the coolant temp and the suction line temp a few inches from the compressor.
And one more question before I call it a night and let all this knowledge sink in...how should i go about pinching it...a VERY tiny bit at a time..montiro and then move on? How do i know when enough is enough...id like to have a general outlook as to what to look for before i go to far?
Less coolant wont get you colder ,It will get you cold faster.Quote:
Originally posted by Conflict
I think i am gonna use Jamal's idea of putting something in there to take alot of room up so i can use less fluid..less coolant shoudl equal colder temps shouldn;t it..i mean then the evap has less to cool and can get what is there cooler.
Any other ideas?
well...considering i already get to my maximum(coldest) temps in just a few hours i don't think that is an issue for me thenQuote:
Originally posted by jamaljaco
Less coolant wont get you colder ,It will get you cold faster.
Mine will pull down to its lowest in 40 min
Quote:
Originally posted by jamaljaco
Mine will pull down to its lowest in 40 min
well i guess i am making a guess...i also have 2 1/2 times asmuch fluid as you!
I have never pinched a cap tube, but yes, I would pinch it a very tiny bit at a time, and then wait for about 15 minutes to view the results. The coolant must be at its lowest temp before we start. And several pinches are better than one big pinch. I want the suction line temp to be about 10C higher than the coolant temp, and I want the bottom of the compressor to be warm.Quote:
And one more question before I call it a night and let all this knowledge sink in...how should i go about pinching it...a VERY tiny bit at a time..montiro and then move on? How do i know when enough is enough...id like to have a general outlook as to what to look for before i go to far?
So measuring the temp of the piping a few inches from the compressor...when i see the temps are about 10C warmer then the coolant...that is when it will be optimal?Quote:
Originally posted by Gary Lloyd
I have never pinched a cap tube, but yes, I would pinch it a very tiny bit at a time, and then wait for about 15 minutes to view the results. The coolant must be at its lowest temp before we start. And several pinches are better than one big pinch. I want the suction line temp to be about 10C higher than the coolant temp.
Sorry for all the basic questions..i am just a person of detail..want to do it one time and do it right!
No, optimal is when we do it right. The best we are going to get with the pinch method, overcharge, and no gauges, would be ballpark. Keep in mind that each pinch takes time to take effect.Quote:
So measuring the temp of the piping a few inches from the compressor...when i see the temps are about 10C warmer then the coolant...that is when it will be optimal?
OVercharge? Do you still really think the system is overfull of refrigerant?Quote:
Originally posted by Gary Lloyd
No, optimal is when we do it right. The best we are going to get with the pinch method, overcharge, and no gauges, would be ballpark. Keep in mind that each pinch takes time to take effect.
And yea it isn;t looking like i will be able to get any guages until I get back from florida.
I am just way into making due with what i have...so i want to tweak it with what i can for now....but i am gonna turn the system on in the morning...take temps of the coolant and the suction line after the system has been running for a hour or so...and then slightly pinch it..let it run for another hour or so and i will report the difference here.
TOmmorrow night here in northern mn gonna be -25F so I am gonna be overclocking a Pentium 4 system. Maybe i will have a great day and be able to fully clock a AMD and Intel...lol
Nope ,no accumulator, I do have a nifty series of humps in my suction line from all the bending, My compressor runs 108f system loaded after pulldown,with the ambient at 72f, its around 12f degrees warmer during pulldown in the same conditions.Quote:
Originally posted by Gary Lloyd
More importantly, the compressor isn't safe from floodback. I'm thinking your system has an accumulator in the suction line. That is the device that is saving your compressor. I don't recall seeing one on conflicts's system.
Also, I see it says in your profile you authored a book....
I am extremely interested in learning ALL about refrigeration. I am a seriously fast leanrer and i am always taking up a new interest and since playing with this over the last week I believe along with computers I have foudn somethign that really truly sparks a GREAT interest in me. If you could help me out and point me towards the best data or info to get started in learning the basics and semi advanced basics of refrigeration...i would greatly appreciate it
The lower the evaporator temp, the less refrigerant is needed. Your A/C is charged for above freezing evap temp. Yes, it is overcharged, and will be more so when you are finished pinching it.
Another thing to keep in mind: A pinch is a weak spot, which can snap if it is knocked around. When we are done, we want to strap the pinched area to the suction line, so that it doesn't get moved around and snapped.
Actually, I have authored 4 books. They are written in plain english where possible. I would recommend first going to:Quote:
Also, I see it says in your profile you authored a book....
http://refrigerationbasics.com
By the time you read through the samples, you will be ready for my book(s). I am retired and if I sell a few books I get to eat, so please hurry. I am fading fast. :D
The temperature in compressor heaven is 140-160F/60-70C, but 108F is well out of the danger zone. :DQuote:
My compressor runs 108f system loaded after pulldown,with the ambient at 72f, its around 12f degrees warmer during pulldown in the same conditions.
What is the temp on the bottom of the compressor at lowest coolant temp, while unloaded? This is where flooding is most likely.
ok just checked the compressor bottom was 93f with an ambient of 73f. The rest of the compressor is around 2f cooler than the bottom.Quote:
Originally posted by Gary Lloyd
What is the temp on the bottom of the compressor at lowest coolant temp, while unloaded? This is where flooding is most likely.
Hey Gary, is it true that when you get old there is little need for sleep?