Noritz ecoTOUGH NRC711-DV Installation Manual

Also see for ecoTOUGH NRC711-DV: Owner's guide Installation manual Owner's guide Owner's guide Replacement

Contents

28Recirculation SystemCombination Potable Water and Space Heating SystemCold Water SupplyIsolationKit(*㸱)Gas SupplyAquastat(*2)Hot WaterOptional 8-10 GallonStorage Tank(To alleviate cold water sandwich)GlobeValvePump(*1)Expansion Tank(Install accordingto local code)FixturesHot Water ReturnIsolationKit(*1)Gas SupplyBackflow Preventer(optional)CheckValve(*3)Cold WaterSupplyOptionalExpansion Tank(*6)Mixing Valve(*5)Hot WaterPump(*2)Flow Switch(*4)FixturesAir HandlerNotes:1. Noritz recommends the use of an Isolation Kit withthe installation.These kits include an integrated shut-off and servicevalve with unions and a pressure relief valve.2. Size the pump to provide a maximum of 2 GPM(7.5 L/min.) with a head pressure equal to the lossthrough the water heater and Air Handler.3 . Check valve required if it is not included with the pump.4. Set the flow switch to deactivate the Air Handler whenthe domestic hot water flow reaches 2 GPM (7.5 L/min.).Adjust as necessary to prevent cycling.5. If the system requires water for space heating at a highertemperature than for other uses, means such as amixing valve shall be provided to temper the water forthe other uses to help prevent scalding.7. The water heater cannot be used for space heatingapplications only.6. Expansion tank required if a backflow preventer is installed.8. Only POTABLE water may be plumbed throughthe water heater.RBWPump120VAC105NeutralGroundLiveSNotes:Use Honeywell Aquastat(Model L6006A or L6006C)Aquastat Wiring1. Size the pump to provide a maximum of 1.5GPM(5.7L/min.) through the system at 10ft (0.3m) ofhead plus piping losses.Adjust the flow using a globe valve and verify theflow rate with the maintenance monitors.2. Set the Aquastat to 10˚F below the set outputtemperature.3. Noritz recommends the use of an Isolation Kitwith the installation.These kits include an integrated shut-off and servicevalve with unions and a pressure relief valve.NORITZCondensingTankless GasWater HeaterNORITZCondensingTankless GasWater Heater11. Plumbing Applications▲The illustration is an example. Please check with the actual water heater about the position of piping, and form.