Quote:
Originally Posted by FrqntFlyer
Ok. I put the gauges and a a vacuum pump and it immediately pulled down to around 15 psi. after a few minutes it was down to 27 psi. I let it run for about an hour and shut it down. When I get home ill see if it held overnight.
It may be wishful thinking.
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Vacuum is Inches of water..not PSI (29" is a Full vacuum.. 27 is partial) and is Negative pressure.. inches is a LOT less than PSI..
if a system wont hold a vacuum it definitely wont hold refrigerant.. if your system DOES hold the vacuum, then you still need to charge with 150 PSI of NITROGEN...
Nitrogen is not temperature dependent and is detectable using an ELD
DOnt use refrigerant to pressure test a system as its pressure readings will change with temperature.... not to mention its frowned on by the EPA to charge a known leaking system..
-Christopher