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4.6 Connect Water Supply <br /> 4.6.1 Guidelines <br /> • The piping (including soldering materials) and components connected to this appliance must be <br /> approved for use in potable water systems. <br /> • Purge the water line to remove all debris and air. Debris will damage the water heater. <br /> • The appliance must not be connected to a system that was previously used with a non-potable <br /> water heating appliance. <br /> • Ensure that the water filter on the water heater is clean and installed. <br /> • DO NOT introduce toxic chemicals such as those used for boiler water treatment to the potable <br /> water used for space heating. <br /> 4.6.2 Instructions <br /> To connect the water supply, follow the instructions below. <br /> IMPORTANT <br /> Water connections to the water heater should follow all state and local plumbing codes. If this is a <br /> standard installation, refer to the "Piping Diagram for Basic Installation" below. <br /> _) <br /> 1. Plumb the cold water supply line to the water heater on the 3/4 in. MNPT connection at the bottom of <br /> the water heater marked "COLD." <br /> 2. Plumb the hot water supply line to the 3/4 in. MNPT connection marked "HOT." <br /> 3. If a pipe cover will be installed, make sure water lines to the water heater fit within the confinements <br /> of the pipe cover. <br /> PIPING DIAGRAM FOR BASIC INSTALLATION <br /> The condensate drain pipe (along its entire <br /> length) must be at least the same diameter <br /> as the drain line (1/2 in. NPT). <br /> Refer to section "4.9 Connect Condensate <br /> Drain"for more information. <br /> KEY �}{ <br /> V 3/4"Ball Valve Pressure Regulator Condensate Drain Line <br /> 3/4"Union I� Circulating Pump o 0 <br /> Check Valve Boiler Drain Valve <br /> Pressure Relief Valve Solenoid Valve Gas Supply <br /> This Is not an engineered drawing.It Is intended only as a guide and not <br /> as areplacement for professionally engineered project drawings.This <br /> drawing Is not intended to describe a complete system.It is up to the <br /> contractor/engineer to determine the necessary components and n <br /> configuration of the particular system being installed.This drawing does <br /> not imply compliance with local building code requirements.It is the <br /> responsibility of the contractor/engineer to ensure installation is in Cold Weber Supply Li00 <br /> c.rdance with all local building codes.Confer with local building <br /> officials before Installation. <br /> I Ure 56 Hot water Supply Line <br /> Rinnai Tankless Water Heater Installation and Operation Manual 54 <br />