What is the primary function of an aquastat in a hydronic heating system?

The primary function of an aquastat in a hydronic heating system is to control the temperature of the water. An aquastat functions as a thermostat specifically for water, monitoring the temperature and regulating the operation of the heating system accordingly. When the water temperature falls below a set point, the aquastat activates the burner or heating element to bring the water back up to the desired temperature. Conversely, it will shut off the heating element once the temperature reaches the set limit to prevent overheating. This regulation is crucial for maintaining efficiency and safety within the heating system, providing comfort in living spaces by ensuring that the water does not exceed or fall below required temperatures.

Understanding the role of the aquastat helps in recognizing its importance in maintaining the overall functionality and safety of hydronic heating systems, which rely heavily on stable water temperatures for effective heat distribution.