On 14 Jun 2006 09:27:42 -0700, "RAJ" wrote:

It's difficult to understand because the guy today said it was TOTALLY
uneccesary. It's only necessary if you need a different sized tubing,
which I don't. Plus, who in the hell knows how much extra it would
cost to rip the thing out. Why would I want to pay for something extra
that I don't need??? That's the difficult part to understand.
He said there were concerns a few years ago about mixing the oils, but
basically those concerns have proven to be unfounded. Of he's going to
vacuum it out during the install, so that should get rid of most of it
anyway.

Carrier, who I think it's fair to say knows about 410 at least as much
as anyone else, is not as concerned about the oil as they were
initially. Replace the line set when switching to 410 if it's
practical. But, If the vertical sections are in walls, don't worry
about them but replace the accessible horizontal sections which are
more likely to have small amounts of oil trapped in them. That's
according to Carrier. I would recommend blowing nitrogen through the
lines that are being re-used anyway.

Anyone who makes a big deal about the price of either refrigerant must
be planning on going back to put lots more in. Your system will not
consume it like a car consumes gas, so why is that even an issue? The
average system holds maybe five or six pounds, so what's the big deal,
even if it all has to be replaced once in the life of the system?
Nothing wrong with 410 at all, and 22 will probably still be available
by the time your system needs to be replaced again. I would tend to
go with 410 just because the wider range of equipment choices at this
point is with 410.



Zephyr wrote:
Run a new lineset and abandon the old.... what's so difficult to understand
about that. [Otherwise, you could use the older lineset provided it has
less than 5% of the mineral oil left from the R-22 after the install.] But
I'd prefer a new lineset if its at all possible.

--
Zyp
"Scott Townsend" wrote in message
. com...
The Installers I've worked with on my last two projects were pretty much
in
the Majority of going with the new R410a. There were a few Old Timers
that
tried to convince me that R410a is crap and they don't install it, though
I
think it was that they were not a certified R410a installer and didn't
want
to get up to speed. The Bigger companies and the newer companies only
installed R410a. If you really wanted the R22 they would.

If you have to tear into walls and its going to cost you a bit to get it
in
the wall, etc, then you might want to stick with R22, if you have easy
access to the lineset its not going to be that much to run a new one for
the
R410a

Scott-


"RAJ" wrote in message
ps.com...
Do you think it would be wise to switch over to 410?

HeatMan wrote:
"RAJ" wrote in message
oups.com...
I'm going to upgrade my AC, probably to a 13 or 14 SEER. Is is best
to
just stick with the R22 in this case? When will R22 become more
expensive than R410? From what I understand the units are similar in
price, so that shouldn't be an issue.


R22 refrigerant will be manufactured until 2020. They amount made will
drop
annually, but it will still be made. The equipment using R22 will no
longer
be made after 2010.

If I do stick with R22, is there any need to replace the lineset?
It's
15 years old? The compressor hasn't failed though, so no
contamination
in that regard.


If the lines are sized properly, they shouldn't need replacement if you
go
back with R22. If you go with R410a, you should have them replaced.