Navien NPE-180A Operation Manual

Also see for NPE-180A: Installation manual Installation & operation manual Specification sheet Installation manual Service manual

Contents

Navien NPE-180A Operation Manual Manual pdf 11 page image

Maintaining the Water Heater 114.3 Flushing the Heat ExchangerCAUTIONFlushing the Heat Exchanger is a somewhat complicatedprocedure. Read the following instructions carefully beforeattempting this procedure. If you are uncertain about any ofthe steps in the procedure, contact an authorized technician orlicensed professional. Keep in mind that improper maintenancecan void your warranty.Refer to the “2.2 Parts of the Water Heater” on page 6 for detailsabout part locations.Before flushing the Heat Exchanger, gather the following items:A bucket that is 5 gallons or larger●Cleaning solution diluted with water●3 hoses●A water circulation pump●To flush the Heat Exchanger:AABBCCDDNavien Easy valve KitCold Water LineHot Water LineCirculation PumpFlushing KitRemove the recirculation inlet filter from the bottom of the6.water heater (“A” model only).RecirculationInlet Filter(“A” model only)Pump Drain Plug(“A” model only)Cold WaterInlet FilterOpen the pump drain plug (“A” model only).7.Remove the cold water inlet filter.8.Allow the residual water to drain from the water heater.9.When the water is completely drained, reinsert the10.recirculation inlet filter and the cold water inlet filter, and thenclose the pump drain plug.To refill the water heater follow the steps of “Draining the11.Water Heater” in reverse.