How To Check Superheat On A Walk In Freezer. Find all the equipment you will be starting and make notes. Excessive or high superheat is an indication of insufficient refrigerant in the evaporator coil for the heat load present.
Use your measurements to determine the amount of. Superheat at the compressor has a direct effect on Check compressor and evaporator superheat, adjust if necessary.
A minimum superheat of 20°f is required at the compressor.
Usually the bottom rows of the evaporator will freeze up when this occurs. If you put the pressure charge on the equipment, you should have done so. A technician can measure total superheat by placing a thermometer, thermocouple, or thermistor at the compressor inlet and reading the temperature. Take a walk around, check with the job supervisors, check in with other trades, etc.