How To Check Superheat On A Walk In Freezer. The ability of the evaporator to efficiently exchange heat is totally dependent on having a fully active coil as near to saturated suction temperature of the refrigerant as possible. Compressor superheat consists of evaporator superheat and suction line superheat.
Pay close attention to areas around solder joints, building penetrations and pipe clamps. A minimum superheat of 20°f is required at the compressor. Set the superheat around 6 to 8 degrees in the freezers and around 8 to 10 degrees in the coolers.
The ability of the evaporator to efficiently exchange heat is totally dependent on having a fully active coil as near to saturated suction temperature of the refrigerant as possible.
Take a dry bulb temperature of the outdoor ambient air. Pump the unit down, take the screen out and blow through it. Check any suspect areas with an electronic leak detector. To check superheat, attach a thermometer designed to take pipe temperature to the suction line.