Question 185Refrigeration/AC - 1st Asst/Chief70% to pass
What maintenance may be carried out on a thermostatic expansion valve?
AI Explanation
The correct answer is C) The inlet screen may be cleaned.
The thermostatic expansion valve is a critical component in the refrigeration system that regulates the flow of refrigerant into the evaporator. The inlet screen can become clogged over time, restricting the flow of refrigerant and impacting the valve's performance. Cleaning the inlet screen is a routine maintenance task that can help ensure the proper operation of the thermostatic expansion valve.
The other options are incorrect because they do not represent typical maintenance activities for a thermostatic expansion valve. Recharging the thermal bulb, varying the proportional action, or increasing the rate action are not common maintenance procedures for this component.
Related Questions
#183 Which statement about calibrating a newly installed thermostatic expansion valve is correct? #184 When a thermostatic expansion valve is installed in a refrigerated container unit, the sensing bulb almost always requires insulation. Why is this so? #186 Which of the listed statements describes the method used to determine the amount of superheat present in the suction gas leaving the evaporator coil? Illustration GS-RA-16 #187 The coil temperature measured at the expansion valve sensing bulb of an operating system is 10°F. The low side pressure with the compressor running as shown on the gauge illustrated indicates 15 psig. What adjustments or changes, if any, should be made to the system? Illustration GS-RA-16 #188 Of the various possible methods shown in the illustration, which is the correct method of attaching a TXV feeler bulb to a large line (7/8" and larger) with a horizontal run? Illustration GS-RA-50