How to check superheat at evaporator with zero mistake
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Take a pressure reading of the suction line at the evaporator to get refrigerant saturation pressure=temperature. If the superheat is too low on a tev system we would say the valve is too far open. Add charge to lower superheat or recover charge to raise superheat.
Fixed orifice superheat formula = suct.
The fact that these readings are normal indicates the low suction pressure is not caused by low refrigerant, but insufficient heat getting to the evaporator.cause #2: If the condensing unit has no flooded Checking the evaporator’s superheat value will help you determine the difference. To measure the total superheat, take a pressure measurement on the vapor line where the refrigerant enters the outdoor unit.
