ESCO Air Conditioning Practice Exam

When mounting a thermostatic expansion valve sensor bulb, which of the following is not true?

1. It must be installed at the top of the suction line

2. It must be installed lower than the valve body

3. It should be mounted on the horizontal section of the suction line

4. It should be mounted on the evaporator outlet

The correct answer is: It must be installed at the top of the suction line

The correct answer is about the positioning of the thermostatic expansion valve sensor bulb. It should not be installed at the top of the suction line. Placing it at the top could lead to inaccurate readings as the highest point may not adequately represent the average temperature of the refrigerant within the system. Instead, the sensor bulb should typically be installed on the horizontal section of the suction line, below the valve body and not necessarily at the evaporator outlet. The positioning of the sensor bulb plays a critical role in ensuring the proper functioning of the thermostatic expansion valve by providing accurate temperature readings.