Frank is Surprised Re: <VV> Engineering VS Fact

[FrankCB at aol.com]

Hey Smitty,
    Wow!!  So I am SURPRISED that you have it  working so well that you can 
even get close to 30 inches of mercury (in. Hg)  vacuum.  29.92 is generally 
considered a "perfect" vacuum so that is  certainly low enough pressure that you 
can use it for evacuating A/C  systems.  Thanks for correcting my assumption 
that it wouldn't likely  work.  Now I have to look for a discarded refrig. 
unit.  I wonder if  one used in a window A/C unit would work as well??  Anybody 
know??
    Regards,
    Frank "still learning engineering facts"  Burkhard
 
In a message dated 8/10/2006 12:48:36 PM Eastern Standard Time,  
vairologist at verizon.net writes:

From:  FrankCB at aol.com

All good points, except that I would be surprised if a  refrigerator 
compressor could "pull" a deep enough vacuum to remove nearly  all the air 
from an A/C system. 
-----------------------------------------------------
Smitty  Says:  Here's one of those cases that shows that bumble bees can fly  
Frank.  I have been using my evolved and modified Frigidare refrigerator  
compressor for at least 20 years.  It will pull an indicated 30 inches in  about 
30 seconds.  I have hand valves fitted to hold what the compressor  draws.  As 
a side note the only lube it has ever received is what gets  into it as a 
function of drawing down to reclaim freon from systems.   So There   gg