Industry News

How to install a thermal expansion valve?

2024-09-04

Before installing the thermal expansion valve, check whether it is intact, especially the temperature sensing mechanism.


The installation position must be close to the evaporator, and the valve body should be installed vertically, not tilted or upside down.


When installing the thermal expansion valve, care should be taken to keep the liquid in the temperature sensing mechanism in the temperature sensing package at all times, so the temperature sensing package should be installed lower than the valve body.


The temperature sensing package should be installed on the horizontal return air pipe at the outlet of the evaporator as much as possible, and should generally be more than 1.5m away from the air intake of the compressor.


The temperature sensing package of the thermal expansion valve must never be placed on a pipeline with accumulated liquid.


If the evaporator outlet is equipped with a gas-liquid exchanger, the temperature sensing package is generally placed at the outlet of the evaporator, that is, before the heat exchanger.


The temperature sensing package is usually placed on the return air pipe of the evaporator and tightly wrapped against the pipe wall. The oxide scale should be removed from the contact area to reveal the original color of the metal.

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