I installed a new compressor in a walk in today for one of the company stores. I cannot read any tags except for the compressors. Its laid out with two twin fan evaps with tev's, receiver, head pressure control ect.
I went to charge it after the replacement of compressor and weighed in 15lbs to get started cause that's what i recovered although i found a leak so it was low. I was attempting to charge by subcool and was measuring at the condenser outlet. I have 31 lbs in it right now to get 4 degrees subcooling. I figured this would suffice to get it running and till the cooler pulls down to running temp somewhere around 36 degrees. Im goin back tommorro to finish check ups.
my readings when I left:
ambient = 101
285 psi =127
123 degrees b4 receivers
= 4 degrees sc
285 psi = 127
118 degrees on 2nd receivers outlet
= 9 degrees sc
compressor sh. wanna maintain between 20-30. i didnt check evap sh yet
70 psi lo = 41
62.5 line temp
22 degrees sh
So what do I do for the subcooling to ensure its full, before or after receiver? What for subcooling number should I target for the final charge?