"Bruce in Bangkok" wrote in message
...
On Fri, 15 Apr 2011 09:58:42 -0400, "Wilbur Hubbard"
wrote:

"Wayne B" wrote in message
. ..
On Thu, 14 Apr 2011 16:49:39 -0400, Gogarty
wrote:

However, I have been
having problems with blockage of the capillary tube. The only solution
may
be
a new evaporator.

If the blockage is coming from frozen moisture you may be able to
cure it by leaving a vacuum pump on the system for 6 to 8 hours. I
just had to do that with a new Adler-Barbour system and it seems to be
OK now. The symptoms were that it would start out cooling just fine
on startup and then slowly degrade over 24 hours.




Or, alternately, purge the system with dry nitrogen, then vacuum pump.

http://www.air-conditioner-selection...n-skilled.html

Wilbur Hubbard


Why bother with the nitrogen and additional cost. Just hook up the
vacuum pump and turn it on. Go home, have a beer, eat supper and go to
bed. when you get back to work tomorrow the system will be dehydrated
and all you have to do is load the gas.

The trade has been doing this for Yonks (as out British cousins have
it), successfully.


An ignorant bit of advice, as usual, Bruce. What if the system has a small
leak. Then all the vacuum pump will accomplish is to suck humid air through
the system. If you're going to use a vacuum pump you can't go home and have
a beer and ignore the readings. If it won't hold a hard vacuum then you got
problems. Using dry nitrogen to pressurize the system before vacuuming it
out absorbs any moisture that might have gotten into the works. Try reading
the article. Oh, that's right, you are functionally illiterate. Never mind!

Wilbur Hubbard

Wilbur Hubbard