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Posted by on May 18, 2007, 12:47 am
> > if system develop leak on low side 9 to 1 you must change oil
> > because you can not take moisture out of oil,
>
>
>
> A leak on the low side doesn't mean moisture will get into the system.
> It's still under pressure. How do you figure external moisture is going
> to overcome the pressure of the refrigerant leaking out and infiltrate
> the system?
Low side, it's not ALWAYS under pressure during operation.
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Posted by Bob_Loblaw on May 19, 2007, 8:33 am
> Low side, it's not ALWAYS under pressure during operation.
Yes it is, unless, as I stated in my post, a leak occurs to the point where
a vacuum is caused during operation, in which case the charge is
fractionated and should be completely removed, the leak repaired, a vacuum
pulled, a filter/dryer installed and/or replaced, and a new charge weighed
in.
Remember, I was responding to Tony's post where he stated that with 410A,
even a small leak will cause water to enter the system.
This is simply not true.
--
"Poor Canada. So desperate to be the socialist nirvana of multicultural
heaven, that it ends up being used and abused by the dregs of the world.
Oh, the joys of diversity!"
Respectfully, Bob
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Posted by Tony on May 19, 2007, 11:00 am
>
>
>
>> Low side, it's not ALWAYS under pressure during operation.
>
>
>
> Yes it is, unless, as I stated in my post, a leak occurs to the point
> where
> a vacuum is caused during operation, in which case the charge is
> fractionated and should be completely removed, the leak repaired, a vacuum
> pulled, a filter/dryer installed and/or replaced, and a new charge weighed
> in.
> Remember, I was responding to Tony's post where he stated that with 410A,
This is Tony now Mr. Lawblow where did you read that I said even small leak.
I did not specified size of leak not that would make any difference
how big or small leak is, question here is did system lost charge and gone
in to
vacuum so that moisture can be pull in. You work on air conditions
that low side pressures are let say between 50 and 100 Psi I work on
systems that low side pressure may very between 20" vacuum and 150 Psi
and lot of cases don't have any safety protection such as low and high
pressure
cut off! "stupid design yes" but I did not built them or design them.
Not long ago I replace two scroll compressor because oil return line crack
compressor lost oil and refrigerant and you may use word committed suicide,
Why no safeties and customer did not want put one in, I install new
compressor
but report reads sorry no warrantee.
Dear Sir you need to be in business few more years before
you can even think of catch in up to my experience.
Tony
www.cas-environ.com
> even a small leak will cause water to enter the system.
> This is simply not true.
>
>
>
> --
> "Poor Canada. So desperate to be the socialist nirvana of multicultural
> heaven, that it ends up being used and abused by the dregs of the world.
> Oh, the joys of diversity!"
>
> Respectfully, Bob
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Posted by on May 20, 2007, 4:12 pm
>
>
>
> > Low side, it's not ALWAYS under pressure during operation.
>
>
>
> Yes it is, unless, as I stated in my post, a leak occurs to the point
where
> a vacuum is caused during operation, in which case the charge is
> fractionated and should be completely removed, the leak repaired, a vacuum
> pulled, a filter/dryer installed and/or replaced, and a new charge weighed
> in.
> Remember, I was responding to Tony's post where he stated that with 410A,
> even a small leak will cause water to enter the system.
> This is simply not true.
But it *IS* true, it can and will happen.
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Posted by Dave Martindale on May 20, 2007, 5:19 pm
>> Yes it is, unless, as I stated in my post, a leak occurs to the point
>where
>> a vacuum is caused during operation, in which case the charge is
>> fractionated and should be completely removed, the leak repaired, a vacuum
>> pulled, a filter/dryer installed and/or replaced, and a new charge weighed
>> in.
>> Remember, I was responding to Tony's post where he stated that with 410A,
>> even a small leak will cause water to enter the system.
>> This is simply not true.
>But it *IS* true, it can and will happen.
A leak can let water (and air, which is also bad) enter the system if
the pressure inside the line is below atmospheric pressure. But how
often does that happen?
A pressure of 0 PSI gage (15 PSI absolute) in an R-22 or R-410a system
means that the evaporator is either at -40 degrees, or it's dry (no
refrigerant flowing). This is not a normal operating condition for an
air conditioning system.
In normal operation, the low side pressure is several times atmospheric
pressure and any leakage is outwards.
Dave
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