What is the first thing that must be done when starting up a brand new boiler?

When starting up a brand new boiler, the first step is to boil it out. This process is crucial because it helps eliminate any contaminants or residues that may be present in the boiler system from manufacturing, transportation, or installation. Boiling out involves filling the boiler with water and heating it to a specified temperature, often with the addition of cleaning agents, to ensure that all internal surfaces are thoroughly cleaned before the boiler is put into operation.

This step is essential for protecting the integrity and efficiency of the boiler, as it helps to reduce the risk of foaming, overheating, or other operational issues that could arise from impurities. Once the boil-out process is successfully completed, other tasks such as filling the boiler with water, checking connections, and securing safety valves can follow, but they should not precede the boil-out to ensure that the system is clean and safe for operation.