Question 22Refrigeration & AC - Assistant Engineer

The correct answer is A) the suction line of the compressor will be abnormally warm. If the superheat value of the thermostatic expansion valve is adjusted too high, it will cause the valve to open less, resulting in an over-feeding of the evaporator with liquid refrigerant. This excess liquid refrigerant in the evaporator will not be fully vaporized, leading to a lower temperature in the evaporator. As a result, the suction line of the compressor will be abnormally warm as it pulls in a mixture of liquid and vapor refrigerant, rather than just superheated vapor. The other options are incorrect because: B) the heat removal capacity of the evaporator would actually decrease due to the over-feeding, C) the suction line would be abnormally cold if the superheat was too low, and D) the evaporator being overfed is the cause, not the result, of the issue.