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  • CHAPTER20
    BOILERS AND WATER HEATERS

    User note: Code change proposals to this chapter will be considered by the IRC – Plumbing and Mechanical Code
    Development Committee during the 2015 (Group A) Code Development Cycle. See explanation on page iv.

    SECTIONM2001
    BOILERS

    M2001.1 Installation.

    In addition to the requirements of this code, the installation of boilers shall conform to the manufacturer’s instructions. The manufacturer’s rating data, the name-plate and operating instructions of a permanent type shall be attached to the boiler. Boilers shall have their controls set, adjusted and tested by the installer. A complete control diagram together with complete boiler operating instructions shall be furnished by the installer. Solid and liquid fuel-burning boilers shall be provided with combustion air as required by Chapter 17.

    M2001.1.1 Standards.

    Packaged oil-fired boilers shall be listed and labeled in accordance with UL 726. Packaged electric boilers shall be listed and labeled in accordance with UL 834. Solid fuel-fired boilers shall be listed and labeled in accordance with UL 2523. Boilers shall be designed, constructed and certified in accordance with the ASME Boiler and Pressure Vessel Code, Section I or IV. Controls and safety devices for boilers with fuel input ratings of 12,500,000 Btu/hr (3 663 388 watts) or less shall meet the requirements of ASME CSD-1. Gas-fired boilers shall conform to the requirements listed in Chapter 24.

    M2001.2 Clearance.

    Boilers shall be installed in accordance with their listing and label.

    M2001.3 Valves.

    Every boiler or modular boiler shall have a shutoff valve in the supply and return piping. For multiple boiler or multiple modular boiler installations, each boiler or modular boiler shall have individual shutoff valves in the supply and return piping.

    Exception: Shutoff valves are not required in a system having a single low-pressure steam boiler.

    M2001.4 Flood-resistant installation.

    In flood hazard areas established in Table R301.2(1), boilers, water heaters and their control systems shall be located or installed in accordance with Section R322.1.6.