How should blended refrigerants be charged into a running system?

Charging blended refrigerants into a running system should be done as a liquid, through a throttling valve into the low side. This method is essential for ensuring that the refrigerant is mixed properly within the system. Blended refrigerants consist of multiple components, and when they are charged as a liquid, they can maintain their designed ratios and effectiveness.

When introduced into the low side through a throttling valve, the refrigerant can rapidly expand and absorb heat effectively. If a blended refrigerant is charged in other ways, such as as a vapor, it may lead to an uneven distribution of the components, which can affect the system's efficiency and cooling performance. Therefore, charging as a liquid on the low side helps to achieve the desired functionality and efficiency in the refrigeration cycle, maintaining the integrity of the refrigerant blend.