Disc type temperature limit controls are primarily used to protect what?

Disc type temperature limit controls are primarily designed to protect auxiliary heat elements from overheating. These controls function by monitoring the temperature of the heat elements and shutting them off if they exceed a predetermined safe temperature. This is crucial in preventing overheating, which can lead to damage not only of the heat elements themselves but also of the surrounding components and pose a fire hazard.

In the context of heat pump systems, auxiliary heat is often used to supplement heating capacity, particularly in colder weather, making these controls essential for safe operation. The protection they provide ensures that the system operates reliably and safely, contributing to overall energy efficiency while preventing potential operational failures.