Special thanks to George Peteya, P.E., of Slant/Fin for sharing this circa-1955 Sarcotherm Installation and Service Manual for Modulating Outdoor-Indoor Controls (Sarcotherm Type STA-1 and Type STA-1D). As George wrote, "It's probably the last surviving copy of the first outdoor-air reset controller."
This document contains the complete illustrated instructions for installing the Hercules Steam and Hot Water Heating System, a boiler manufactured by Sears, Roebuck and C...
This document contains the manufacturer's instructions for the HB Smith Series M450L Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor, or Water ...
This document contains the jacket assembly instructions for the HB Smith Series 45 Mills Boiler (circa 1979).