Where must the sensor bulb on a TEV be mounted?

The sensor bulb on a Thermal Expansion Valve (TEV) must be mounted tight to a clean surface on the suction line close to the outlet of the coil to ensure it accurately measures the temperature of the refrigerant leaving the evaporator. This placement is crucial because the sensor's primary function is to detect the temperature of the refrigerant as it exits the cooling coil.

When positioned in this manner, the sensor bulb can effectively monitor the refrigerant's state, allowing the TEV to adjust the flow of refrigerant into the evaporator based on demand. If the bulbis too far from the coil, it may result in delayed responsiveness to temperature changes, leading to inefficient cooling and potential compressor issues due to improper refrigerant flow. This close mounting allows for accurate regulation, optimizing system performance and enhancing efficiency.

Proper sensor bulb installation, therefore, directly impacts the reliability of the refrigeration system, ensuring it operates within designed parameters.