I have been trying to get a cold chamber to run as well as i can. the chamber chills new engines to minus 30 , here are some readings i have taken. Any ideas on what i can do to improve on these.
H.P. pipe temp-34c
discharcge temp 75c
H.P. 220 psi
L.P. 9 psi
suction pipe temp varys, minus 18 to minus 24
chamber was at minus 17 at time readings were taken.
Unit runs on R404a and has adjustable expantion valve. Both coils are clean.