Question 118Refrigeration/AC - Assistant Engineer70% to pass
A thermostatic expansion valve is properly controlling evaporator superheat. Adjusting this valve to lower the evaporator superheat setting will result in which of the following?
AI Explanation
The correct answer is C) the evaporator feed will increase.
Lowering the evaporator superheat setting on a thermostatic expansion valve will cause the valve to open further, allowing more refrigerant to flow into the evaporator. This increased refrigerant flow will lead to a higher evaporator feed, which in turn will decrease the superheat in the evaporator.
The other options are incorrect:
A) The evaporator pressure will actually increase as more refrigerant enters the evaporator.
B) The expansion valve will open further, not close.
D) Lowering the superheat setting will not cause the expansion valve diaphragm to rupture.
Related Questions
#116 When replacing a thermostatic expansion valve power element, what is true concerning the thermal bulb? #117 What maintenance may be carried out on a thermostatic expansion valve? #119 Which statement about calibrating a newly installed thermostatic expansion valve is correct? #120 Of the various possible methods shown in the illustration, which is the correct method of attaching a TXV feeler bulb to a small large line (7/8" and larger) with a horizontal run? Illustration GS-RA-50#121 Which of the following statements describes the accepted method for testing a thermostatic expansion valve?