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1 , Welcome <br /> Thank you for purchasing a Rinnai Tankless To The Consumer <br /> Water Heater. Before installing and operating this <br /> water heater, be sure to read these instructions • You must read the entire manual to prop- <br /> completely and carefully to familiarize yourself with erly operate the water heater and to have <br /> the water heater's features and functionality. regular maintenance performed. <br /> • Keep this manual for future reference. <br /> To The Installer • As when using any appliance generating <br /> heat, there are certain safety precautions <br /> • It is recommended that a licensed profes- you should follow. See section "2.2 Safety <br /> sional install the appliance, inspect it, and Precautions"for detailed safety precau- <br /> leak test it before use. The warranty may tions. <br /> be voided due to any improper installation. <br /> • Be sure your water heater is installed by a <br /> • The trained and qualified professional licensed installer. <br /> should have skills such as: <br /> • If installing in the state of Massachusetts, <br /> — Gas sizing you must read section 7.1 Massachusetts <br /> — Connecting gas lines, water lines, State Gas Regulations" in this manual. <br /> valves, and electricity <br /> — Knowledge of applicable national, state, Acronyms and Abbreviations <br /> and local codes <br /> — Installing venting through a wall or roof Following is a list of common acronyms and <br /> abbreviations used in this manual: <br /> — Training in installation of tankless water <br /> heaters. Training on Rinnai Tankless <br /> Water Heaters is accessible at www. Table 1 <br /> trainingevents.rinnai.us ANSI American National Standards <br /> • Read all instructions in this manual before Institute <br /> installing the water heater. The water heat- <br /> er must be installed according to the exact BTU British Thermal Unit <br /> instructions in this manual. DHW Domestic Hot Water <br /> • Proper installation is the responsibility of <br /> GPM Gallons per minute <br /> the installer. <br /> • When installation is complete, leave this LP Liquid Propane <br /> manual with the water heater(for internal/ NG Natural Gas <br /> indoor units) or give the manual directly to <br /> the consumer. PP Polypropylene <br /> PRV Pressure Relief Valve <br /> PSI Pounds per square inch <br /> W.C. Inches water column <br /> Rinnai Tankless Water Heater Installation and Operation Manual 5 <br />