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Re: Air Conditioning Recharging
Posted by Stephen Goldberger (more from Stephen Goldberger) on Tue, 22 Oct 2002 16:48:43
In Reply to: , Kok Chen, Sat, 17 Dec 1988 12:00:00 

>got the recharge kit ( hoses and gauge ), and 3 cans.
>Any advice on how to do it?

The *best way* is to draw a vacuum and then replace with precisely the 
correct volume of refrigerant and lubricant.  But that's not how I do it.

Ideally you get a table which shows the suction pressure and high pressures 
as a function of air temperature at the condenser and evaporator and fill 
until you get the right numbers.  I've done this with my home system any 
number of times before I discovered where it was leaking from and tightened 
the fitting.  Lacking the table, the gauges usually have guides printed on 
the label that will get you close.  Remember that too little is better than 
too much.  Also remember that by the time you need to do this again, the 
little can will have leaked anything left in it to the ozone layer, so 
after you're done, be a sport and take the half-full bottle to an approved 
a/c technician so the freon can be recycled.

Stephen Goldberger, Editor and Publisher
NINES, the magazine of the SAAB Club of North America
vist our web site at http://www.saabclub.com
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