Question 153Refrigeration & AC - 1st Asst/Chief

The correct answer is B) the suction line of the compressor will be abnormally warm. When the superheat value of the thermostatic expansion valve is adjusted too high, it will allow more liquid refrigerant to enter the evaporator. This results in the evaporator being overfed, causing the refrigerant to not fully evaporate before entering the compressor. The unevaporated liquid refrigerant will then cause the suction line of the compressor to become abnormally warm. The other options are incorrect because: A) increasing the heat removal capacity is the opposite effect of what happens when superheat is too high, C) overfed evaporator is correct, but the suction line being abnormally warm is the key result, and D) the suction line being abnormally cold would occur if superheat was set too low, not too high.