New York Low Pressure Boiler Certificate of Fitness (COF) Practice Test

Where is the aquastat typically located in a boiler system?

1. Above the steam line

2. At the burner control panel

3. Below the water line

4. Alongside the storage tank

The correct answer is: Below the water line

In a boiler system, the aquastat is typically located below the water line. This is crucial because the aquastat monitors the temperature of the water within the boiler. It is designed to provide critical feedback to the boiler control system, helping to regulate the water temperature efficiently to prevent overheating or excessive heat loss. Being positioned below the water line ensures that it accurately reflects the actual temperature of the boiler water, contributing to safe and stable operation. In contrast, options like being above the steam line or at the burner control panel would not provide the aquastat with accurate temperature readings of the water. Similarly, being alongside the storage tank would also preclude the aquastat from effectively monitoring the water temperature within the boiler itself. Thus, positioning the aquastat below the water line is essential for optimal and safe boiler function.