What system component is directly affected by the expansion device?

The expansion device is a crucial component in a heat pump system that regulates the flow of refrigerant it manages. Its primary function is to lower the pressure and temperature of the refrigerant as it leaves the evaporator, allowing the refrigerant to expand before it enters the evaporator coil. By controlling the amount of refrigerant that flows into the evaporator, the expansion device ensures that the system operates efficiently and effectively, promoting optimal heat exchange.

In summary, the flow of refrigerant is directly impacted by the expansion device, as it facilitates the movement and transformation of the refrigerant through the system, ultimately affecting the overall performance of the heat pump.