BTR 151 Instruction Manual Brandname: A.O. Smith Category: Water Heater Total Pages: 52 Table of contents TableOfContents2Approvals3GeneralSafetyInformation4GeneralSafetyInformation5Introduction6FeaturesAndComponents7InstallationConsiderations8Caution9InstallationRequirements12Caution14VentingInstallation15WaterHeaterInstallation19StartUp23SequenceOfOperation25Maintenance27Caution28