What must be submitted to the code official when field assembly of boilers is required?

When field assembly of boilers is required, submitting a copy of the Manufacturers Data Report is essential. This report contains critical information about the boiler, including specifications, design features, and compliance with applicable standards and regulations. By providing this document to the code official, it ensures that the boiler assembly complies with safety and performance criteria as established by the manufacturer and regulatory bodies.

The Manufacturers Data Report serves as an official verification that the equipment has been built and tested according to the necessary guidelines. It also helps the code official understand the specific requirements for installation, maintenance, and operational parameters. This documentation is crucial for the overall safety and compliance of the installation process.

Other options such as a list of materials used, a copy of the manufacturer's installation guide, or a signed warranty document may be helpful in different contexts but do not carry the same level of essential regulatory and safety compliance as the Manufacturers Data Report.