If an air conditioning system is added to a heating system, what is recommended regarding blower pulleys?

When integrating an air conditioning system into an existing heating system, adjusting the blower pulley size is crucial to ensure the system operates efficiently. The recommended action of installing a larger motor pulley serves to decrease the rotational speed of the blower fan. This is important because air conditioning systems typically require a different airflow rate compared to heating systems.

By using a larger motor pulley, the blower turns slower, allowing for a more suitable airflow that matches the needs of air conditioning, which often relies on a more consistent and lower-volume air movement. This adjustment helps to prevent issues such as increased noise levels, excess wear on components, or insufficient cooling performance, which can result from running a blower at a speed intended for heating conditions.

In summary, installing a larger motor pulley effectively adapts the system for the requirements of cooling, ensuring optimal performance and longevity of the heating and cooling system combined.