Which of the following statements about a capillary tube metering device is NOT true?

A capillary tube metering device primarily functions by allowing the refrigerant to flow through a narrow passage, which creates a pressure drop and regulates the amount of refrigerant entering the evaporator. However, it does not actively maintain a constant evaporator temperature. Instead, the temperature can vary based on the load conditions and the balance between the heat absorbed by the refrigerant in the evaporator and the amount of refrigerant entering.

The other statements highlight characteristics of capillary tube metering devices correctly. They do not contain any moving parts, which contributes to their reliability and simplicity. They facilitate the regulation of refrigerant flow based on the thermal load—though not actively, rather passively—and can be straightforward to install due to their uncomplicated design.