Homemoaner and the cost of freon

Daltons law applied.

The link worked.

A Sporlan publication also states that you can measure the condenser temp midway on the coil and compare it to the liquid pressure converted to temp. A deviation of a few degrees indicates non condensibles. This can be done with the unit running.

Actually what it say verbatim is;

The proper use of the P-T relationship can be helpful in discovering the presence of air or other non-condensable gases in the system. This would be revealed by the measured temperature in the condenser or the leaving temperature of the cooling medium being much lower than that indicated by the P-T relationship.

Form10-135

Too complicated especially considering that extra money can be made selling used refrigerant to the next customer.

Perhaps you should learn why they put * by items. I didn't figure you'd understand the diagrams correctly!

The dumbass asks for a schematic, yet lacks the knowledge to read them correctly, go figure!

I thought that only low ballers and hacks did that.

So you like to break laws, nice.

Different strokes for different folks I guess. IMO if your going to charge top dollar you should have enough professional integrity to do the job right and in this case make an attempt to find the leak. A quality the OP's tech apparently doesn't posses.

Maybe he was out of Windex leak detector. :)

Most ICP schematics will have asterisks, in this case it's simply an artifact from when those switches were an option.

Do you really think any compressor manufacturer would honor a warranty these days where the unit manufacturer doesn't include safeties ?

Suggest best to look at the sales brochures, unit specification, or engineering submittal sheets.

The paper below covers models you refer to earlier and by reading the very first page you'll find the unit does indeed have safeties installed at the factory:

No respectable Low baller or Hack would stoop that low. That obviously is a member of the ___________(insert name of favorite s*****ad group)

Hey Dipshit,

Take a look at the spec sheet...

There are units manufactured today *without* pressure switches.... oh no, the world might come to an end. You're such a clueless wonder.

Find where I stated such.

As I said, limits don't matter check the PT chart it will tell you if theres non-condensables.

Your pulling "venturi effect" out your your ass and you know it...it's not going to happen except perhaps once in a thousand years because the specific conditions that must be met are all but completely impossible to happen.

F*ck it just sell them a new condensor...

--( your question has little if anything to do with your determining whether or not there were non-condensables in the refrigerant ).

LOL

Referring someone to specific federal law enacted by the government agency having jurisdiction over refrigerant purity is "pawning it off" according to your twisted view....

snip

Explain how a medium or high temp refrigeration system gets contaminated with moisture because of an evaporator leak.

The system is cycled on and off with a pressure switch above atmospheric pressure.

Nope and nope.

Daltons law describes the effect on pressure with a combination of gases and Charles law describes how pressure and volume react to a change in temperature.

P.S. The condensing unit is indoors, there is liquid in the system, the sg moisture indicator goes from green to yellow. The moisture in the system freezes at the metering device causing a temporary restriction that cycles the unit off on the pressure control above atmospheric pressure for a short period at which point the moisture thaws and the cycle repeats.

How does the moisture get into the system?

Yeah I forget exactly but temp/ vapor pressure relationship is basic gas law not going to look it up.

Not sure where you are going with this but feel free explain--it does appear you are assuming above there already was enough moisture present in the sysyem to freeze and cause a restriction.

So also need to explain how the moisture got there in the first place though I suppose it could become more concentrated upon repeated topping off.

Still, this has little to do with the need for checking pressure temp in order to verify non-condensibles as opposed to routinely replacing the entire charge because there "could be" moisture in it.

I could look it up for you if you'd like. Im not sure about the exact wording of Daltons, Charles, or Boyles laws but that's the jist of Dalton and Charles. Note that none of them describe how air or moisture gets in a system.

Nope, Im not assuming that at all. In fact that's not the case.

Basically I described a service call on a refrigerator and I wanted to see your answer to the question, how did the moisture get in the system that was never in a vaccum or was it repeatedly topped off.

The bottom line is that moisture and air can enter a system even though it is not running in HG. In reality you wont ordinarily get enough air or moisture to notice in comfort cooling (unless you're real astute) but depending on evaporating temps you will notice moisture in a refrigeration system because of the lower evaporating temperature.

You can see it on your gauges, they rise and fall when the moisture is freezing and thawing. In most comfort cooling systems (mechanical a/c) the evap temp is above freezing @40-45Fand the moisture gets trapped in the drier. After the drier absorbs to capacity the excess carries along with the refrigerant and oil. That makes nasties as you know. Eventually the compressor burns out. That's why is always good practice to change the drier every time you open a system.

Just think, with todays POE oil and if there's a moisture problem you also must change the oil and the new oil can only be exposed to atmosphere for 15 minutes tops. If POE oil is exposed longer than that has just become bio waste. That's not a big deal with a semi hermitic but it can be with a tin can.

You're right about the way to check for non-condensibles. Usually if you find non-conds in a system you have a larger issue.

http://216.122.22.11/FetchDocument.aspx?ID=35035a71-2f38-46b9-a2af-46d6312d4def

Wow it's a 13 seer model rated at 2-1/2 tons.

Impressive to say the least.

Lipstick on a pig...

So then how did it get there ? ( or if you like then how come there was no terrorist attacks on our soil till AFTER BUSH took office )

--really not being facetious about the moisture and venturi curious is all...just that Ive checked every book and what not that I have here and never a mention of venturi--like I say not something thats gonna happen except once in well lest say quite a few blue moons.

Well -410 and POE wasnt a part of the original discussion here--actually it was the OP has a -22 system and is tired of the runaround concerning a supposed evap leak and so he was considering a complete replacement vs $1200 to replace the evap.

My own experience here is that before doing anything else make him take a beeper to the schraders.

Maybe then at least I got one thing right this time.

THX.