Pressure control on chiller
 

Anybody who knows about refrigeration units.......
I bought a crab/lobster tank chiller and it has a thermostat and a pressure control unit. Does anybody know if I need to adjust anything on the pressure control unit? And how do I know if its set correctly?

do you havea digital pic of it . im a refrigeration meck some units use a presure control to control cut in and cut out pressures to maintain temp and if it was used as a crab tank chiller it will be set to cold for your tank . if thats the fact i could help you out and set the control out.