What is the main purpose of a Low Limit in a Combination System?

The main purpose of a Low Limit in a Combination System is to protect the system from low temperatures. This protective measure ensures that the system does not operate at temperatures that could lead to freezing conditions, potentially causing damage to components within the system, such as pipes or valves. The Low Limit acts as a safety threshold, allowing the system to shut down or activate heating elements when temperatures fall below a certain point, thus preventing structural failure or operational issues that could arise from freeze damage.

While enhancing system efficiency and preventing overheating are important aspects of a well-functioning system, those are not the primary focus of the Low Limit. Moreover, increasing system pressure is unrelated to the function of the Low Limit and is managed through different regulatory mechanisms within the gas system. Therefore, the correct identification of the Low Limit's role as a safeguard against low temperatures is essential for maintaining system integrity.