I am printing out everyones reply to take
to my mechanic..thanks all..
Bree!
--- Brad Fornal <toyman@digitex.net> wrote:
> Ok, so I am not a heating and a/c expert, but my
> brother is, does that
> count?? Thanks for correcting my error. Now when
> Bree goes to talk to
> the guy, she will have the CORRECT information to
> ask him about. Bree,
> print out Ron's reply, it will help.
> Brad
>
> Ron Soave wrote:
>
> > --- Brad Fornal <toyman@digitex.net> wrote:
> > > I had the 70 Impala converted to Freeze 12. The
> guy
> > > told me that if it blew out warm air, it was
> because
> > > the condenser
> > > core was freezing up from being a bit low.
> >
> > BF,
> > That'd be the evaporator freezing. The condenser
> > "high side" is where the refrigerant enters as a
> gas
> > from the compressor and changes phase to a liquid
> at
> > constant (nearly) pressure and temperature before
> > entering the expansion valve. After expansion, it
> is
> > now on the "low side" of the system, where it then
> > goes into the evaporator distributor pan as either
> a
> > liquid or 2 phase mixture ("under the dome", in
> P-H
> > terms). Because the refrigerant is accomplishing
> work
> > by expanding (very roughly equal to the work the
> > compressor has done in compressing the gas), there
> is
> > a large temperature drop, and the refrigerant is
> now
> > cold. On a refrigerant properties diagram ("P-H",
> for
> > Pressure-Enthalpy), the lower the pressure, the
> lower
> > the temperature. So if you're icing, chances are
> the
> > evap pressure is too low.
> >
> > __________________________________
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>
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