rgallivan@worldnet.att.net wrote:
I just switched back to r-12 after going to rs-276 & not getting the temps
I wanted.
What is rs-276?
The vent temps before I switched back where ~52 to 48 degs now I’m down to
~40 degs & still working on it but before there was hardly any condensation
There should be condensation. even if the vent temperature is in the 50s range,
the
condenser tubes are much lower. Anything lower than the dew point of the
incoming ait will produce condensation.
dripping from under the car, to the point that I thought the drains were
clogged again but after switching back it pours out.
Colder will produce more, naturally. How much do you need?
The center vent temps did hit the mid 30’s but the sight glass still looked
like it wasn’t FULL of fluid so I pumped in some more gas then the temp
rose to the low 40’s
to maybe 50. So I figure that I over filled , bleed some off but the sight
You WHAT??? Is this R-12 you are talking about? Don’t you know why
it was phased out? (sorry for the sermon, but really…)…
glass seems to have a void & fluid, rev the engine up & it appears to be
full of fluid. From what I’m gathering here the sight glass should be full
of fluid with NO bubbles. When I get that I’m seeing higher center vent
temps Higher hi side pressure 230+ , low side 20 - 25 psi @ 1200rpm but
that might be because the temp in front of the condensor was 108F. This was
done with the outside temp ~85 degs F close to 100 humidity.
Are these gauge pressures or absolute? That is, do I need to add 14.7 to get
the absolute pressure?
This may sound dumb [ 40 grit armor suit on ] should I keep filling
the system until the sight glass is full of fluid ? Should it be full of
fluid at say 1200 - 1500 rpm ?
ROM says a few bubbles below 70 F ambient is OK at 1800 RPM. Kirby
will want total absence of bubbles, period
Would the fact that the air temp in front of the condensor was 108F effect
the fluid level in the sight glass & the temp at the center vent ?
I expect so. Higher ambient means higher condensing pressure, meaning at the
very
least lower cooling effect per unit power expended. But then this may just
translate into
more power draw from the engine rather than less cooling at the evaporator. I
would expect
more bubbles, but really have never been able to see ANYTHING in a sight glass,
even when
I had R-12. Too much crude in there.
Ed Sowell
76 XJ-S