I helped starting up a new supermarket installation which I helped install. Was told to check and adjust all superheats to 6 degrees. Was instructed to adjust exactly as Nanotech described in this post with several additional steps.
We locked the eepr to 100% and made sure the case temp was at design temp.
I noticed the suction pressure was always fluctuating, due to other circuits, which I imagine made the txv hunt all over the place.
Seems to me there may be a better method. Do whatever you have to do to make the suction pressure remain constant, as in turn off some compressors, valve off some cases, etc… Once you get that adjust the superheat. The txv shouldn’t be hunting all over the place and the superheat should be relative constant. Open or close the valve as needed.
So will this work? If not, why.