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
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.
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
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
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
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.
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.
According to the Rheem tech rep, if the lineset is correctly sized, blowing
it out with N2 real well and using a little lineset flush is sufficient for
a new R-410a system. Contrary to popular belief, R-410a is a more efficient
refrigerant, and requires a smaller compressor. The same size of R-22 system
in the same efficiency will use twice the amount of refrigerant to do the
job. The real catch is if the lineset is correctly sized. As far as
reliability, I have recently replaced 35 year old R-22 systems with
R-410a....I can't say about the longevity with the new because it hasn't
been around that long.
Ok..... 2 heat pumps, 4 ton, 13 SEER...same series......
RPNL-048JAZ 13SEER R-410a heat pump takes 11.5lbs refrigerant and rated 21.8
RLA(measured amp draw on the compressor is 12.8 - 13.2 amps) Copeland
compressor # ZP42K5E-PFV-130
RPNE-048JAZ 13SEER R-22 heat pump takes 19.8lbs refrigerant and rated 22.7
RLA (measured amp draw on the compressor is 17.6 - 18.0 amps) Copeland
compressor # ZR45K3-PFV-835
The R-410a compressor is also physically almost half the size of the R-22
compressor. Using half the amount of refrigerant, half of the coils(single
layer instead of double layer coils in the condenser/heat pump), and a
smaller compressor, to give the same or greater efficiency at the same BTU
capacity, makes R-410a more efficient......almost twice that of R-22.
You're talking about one model of one manufacturer. Why do they tell
us in 410a training classes that 410a is only 5% more efficient than
r-22? Are ALL manufacturers going to single row condenser coils or
Your argument is somewhat slanted if you dont also include todays
repair costs of 410a vs R22.
like the man said, its all nothing more than a political thing
designed to line the pockets of corporate america.
So, um, how is it both units ARE THE SAME SEER?
Efficiency is simply the ratio of two scalar physical quantities: heat
moved to power consumed. For example, BTUs per watt-hour. Coil or
compressor volume is not a factor.
So why is it that the coils size, volume, refrigerant quantity, compressor
size, compressor capacity are so much larger on the R-22 systems to get the
same efficiency and BTU ratings as the same equipment in R-410a????
I can only tell you what I *SEE* from direct, hands on experience, and what
I am learning from the manufacturers tech reps, and engineers.
Richard, Just for grinns, how many of each of these systems have you
installed?? What first hand experience do you have with the new systems??
That's an interesting issue, but it is not a matter of efficiency.
Your observations are fine. Your analysis of those observations is
muddled as regards efficiency.
The profit motive tends to overpower critical thinking. Here is some
typical blarney from a Peirce-Phelps, Inc Web page that shills for
Carrier (http://www.nopay.com/aircond_38TZA.asp ):
Now if it is more efficient, up to 14 SEER, then this implies there is
no R-22 system of 14 SEER or more. Which is false.
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