hey luke, whats the mix of R290+Co2 in percent?, why do u use R600? i think it isnt needed.
for R290+Co2 its a very good temp, i reached about the same without freezing the suctionline or evap.
maybe u could get ethylene and add some, because HX temps with about -50C would be enough!
pressure is also down, maybe there isnt condensing enough R744, with 10bar HD and -40C it would condense everything, maybe try to add some more R744 and it will go down to -90C with little vacuum (-0,1)
Last edited by MaReNoStRuM; Sep 11th, 06 at 08:26 PM..