SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam

An aquastat on a hot-water heating boiler primarily does which of the following?

Measures steam header pressure and opens the safety valve Senses boiler-water temperature and cycles the burner (operating control) and/or stops the burner at a high-limit temperature Proves stack draft only Sizes the expansion tank

Correct Answer:

Senses boiler-water temperature and cycles the burner (operating control) and/or stops the burner at a high-limit temperature

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