Did a compressor change-out on one of these today. At start up found high side a little below normal and suction at 12 psi. I was thinking. "Is this thing restricted". So i'm looking around for a cap tube. No cap-tube. Okay, "where's the TXV"? No txv! But, i did find an Constant pressures expansion valve. My pressure were 130 hi and 12 low after weighing in charge. Bath temp was 66°F. What do you all think? It is cooling. But, i don't know what kind of pressures to expect on this system. Also didn't really like the high SH.
Perlick M# 4404