How To Check Superheat On A Walk In Cooler. Poor distribution of refrigerant thru the evaporator nozzle and circuits. See corrective steps for low suction pressure.
Make sure you leave at least four (4) to six (6) degf superheat at the evaporator minimum measured around the txv bulb. Usually the bottom rows of the evaporator will freeze up when this occurs. Identify fan cell (s) causing vibration and check motor and blade carefully.
I have some general questions on superheat and subcooling for walk in coolers and freezers, i am not working on a walk in right now that i can refer to just want to gain a little more understanding.
Check any suspect areas with an electronic leak detector. Make sure you leave at least four (4) to six (6) degf superheat at the evaporator minimum measured around the txv bulb. Check any suspect areas with an electronic leak detector. There should be no more than 5 degrees f difference in the superheat between any two circuits as they enter the header.