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Key Pressure Relief Valve 3/ 4" Ball Valve3/ 4" UnionCheck Valve S Pressure RegulatorCirculating PumpSolenoid Valve Boiler Drain Valve 13 TanklessWaterHeaterPrimary TanklessWaterHeaterSub 1 TanklessWaterHeaterSub 2 TanklessWaterHeaterPrimary TanklessWaterHeaterSub 1 TanklessWaterHeaterSub 2 Pressure Regulator Set to 5 PSI Below Street Pressure Cold Water Supply Line Gas Supply TanklessEquipment List QTY Tankless 6 Water HeatersElectronic Connection ** Refer to Tankless Accessories and Model Applicability forelectronic connection details. Hot Water Supply Line Drawing Number:WH-6 Domestic Hot Water - Standard Installation6 Tankless Water HeatersPreferred Piping Installation Drawing Date: February 27, 2008 This is not an engineering drawing; it notas a replacement for professional engineering This drawing is not intended to describe It is up to thecontractor or engineer to determine andconfiguration of the particular The drawing doesnot imply compliance with It is theresponsibility of the engineer isin accordance with Confer with local buildingofficials before installation. Key Pressure Relief Valve 3/ 4" Ball Valve3/ 4" UnionCheck Valve S Pressure RegulatorCirculating PumpSolenoid Valve Boiler Drain Valve 14 Minimum 3/ 4 " C old W aterS upply Line Minimum 3/ 4" Hot Wate rSupply Line S S 1/ 4 " MinimumNormally Op enSolenoid Valve 3/ 4" MinimumNormally ClosedSolenoid Valve VacuumBreaker TanklessEquipment List QTY IMPORTANT! With electrical power supplied to a Tankless water heater, it will not freeze in enviornments as cold as -30.F, when protected from direct wind exposure. In the event of a power failure at temperatures below freezing, the water heater should be drained of all water to prevent freezing damage. The unit may be drained manually or through the installation of the Optional solenoid valves as shown. The electrical connections for the two solenoid valves should be tied tothe 120 V power terminals provided on the PC Board of the water heater. When the electrical power to the water heater fails, the cold water supply drain down solenoid valve opens, allowing the water heater and associated piping to drain. Ensure that you run the drain for the solenoids per local codes. OutdoorTanklessWater HeaterRoute drain per local codes NOTE:outside building structure. These are indicated by being above the dashed line. line should be located inside the building structure. The vacuum breaker line should be located inside the building structure. NOTE:enclosure or recess box and packed with insulation for additional protection. Outdoor Tankless 1 Water Heater Gas Supply Line Key Pressure Relief Valve 3/ 4" Ball Valve3/ 4" UnionCheck Valve S Pressure RegulatorCirculating PumpSolenoid Valve Boiler Drain Valve Domestic Hot Water - Optional Freeze Protection1 Outdoor Tankless Water HeaterPreferred Piping InstallationThis is not an engineering drawing; it notas a replacement for professional engineering This drawing is not intended to describe It is up to th...

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