So this is the 2nd time I replaced parts of the system.
The last one was a new China scroll type and lasted 6.5 years then exploded (hope Pic is attached).
All parts (all - every line, hose, cond, evap, comp, everything) were replaced last time. System was perfect for all that time (6.5years).
This time I elected to only change the compressor, condenser, dryer and exp valve and flush everything else. The evap seemed hard to flush, but this was my 1st time. I did get some very very fine glitter from the evap, but nothing from anywhere else.
Here's where I messed up. While running after charging. I wasn't thinking and my wife walked into the shop. I opened the low manifold valve with nothing attached, probably for like 30 seconds. I believe this sucked air into the system and caused some low pressures.
After that the system sent cool air but not cold (approx 52° @ 95° ambient). Pressure was 30-35L & 150H (psi). I drove it and didn't seem to have that chill I wanted from the vents. Clutch never cycled.
Stupidity, I added more Freon and bumped the pressure till it cycled (probably for the wrong reasons). Now at 42-52L & 275-325H. The system would cycle when RPM went up but the compressor made a low whine like it was over worked.
I decided to start over. Recovered with my homemade tank. Vacuum and left it under vacuum overnight.
Questions?
Will the piston compressor cool as well as the old crappy scroll types?
Will piston give similar pressures?
Do I need the same Freon charge?
I used the correct amount of oil as prescribed by kit instructions (almost the same as OE amounts). Is this amount good for a piston unit? The housing for the R/D was much larger and the R/D kit provided was too small. Same decant pack, larger bore filter and plug.
My plan is to replace lost oil from recovery, charge exactly what the OE spec is and retest.
Any suggestions would be greatly appreciated.
Thank you if you read my long drawn out post.
-Dave
