Which starting relay must be mounted in the upright position on a refrigeration system?

The starting relay that must be mounted in the upright position on a refrigeration system is typically the potential relay. This type of relay is designed to operate based on the voltage levels and is sensitive to its orientation. Mounting it upright ensures proper function and avoids issues related to fluid movement or misalignment that could impair its performance. Proper installation is crucial for reliable operation of the refrigeration system.