Hi All!
Newbee to RE here. I'm trying to diagnose a problem with Hill Phoenix OIZ, ONZ cases that are having problems with leaking evap coils in the cases. These are on parallel refrigeration racks running R0404A, with head pressures around 220 PSI with Koolgas defost. CPC E2 controllers running the show.
We are having leaks in several areas of the coils. The cases seem to be piped correctly and are operating fine just having leaks pop up in the center. top and bottom of the evap coils. The A9 valves are set high and the Koolgas defrost could really for all intended purposes be hot gas defrost.
I want to try to lower the head pressure from 220 PSI to about 160 PSI and set the A9 and A8 valves but are not sure of the proper procedures to set them. I tried looking at H/P website but no luck. Anyone know where to find this info?