Re: delorean air conditioning question

["David Teitelbaum" <jtrealty@xxxx>]

You need to pull a vacuum of 700 microns minimum. You cannot read this
on an ordinary compound gauge, you need an electronic vacuum gauge.
You should hold this level for at least 1/2 hour, the longer and lower
the better. I try for 400 microns for 1 hour. If you can't get there
it could mean either leaks, contamination, or too much moisture in the
accumulater. CFM is short for Cubic Feet per Minute which is a
measurement of flow, not pressure-vacuum. You can't damage the seals
from too much vacuum. In reality it is just the removal of atmospheric
pressure which is around 15 psi so you can think of it as a negative
15 psi pressure. If any seals do fail during an evacuation they
wouldn't have held up against the pressure which on the low side can
go over 100 psi and on the high side over 150 psi.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, john fredt <hecklerkochgmbh@xxxx> wrote:
> 
> I need some help with evacuating the air conditioning system.Does
anyone know how many cfm to bring it down too? My pump can pull 5 cfm
but im sure thats way more than necessary.Im not certified for air
conditioning work so I dont know.Can to much vacuum damage the
deloreans ac system? It seems to much would cause the seals to
fail.Isnt that correct? 
> 
> 
> 
> thanks guys