Navien NPE-180A Installation Manual

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

Navien NPE-180A Installation Manual Manual pdf 26 page image

26 Installing the Water Heater3.5 Connecting the Condensate DrainThe Navien Condensing Water Heater creates condensation whenit operates. This condensation has an acidic pH of 3-5. Follow alllocal codes and regulations when disposing of condensate fromthe water heater. We recommend draining the condensate intoa laundry tub, as the alkali in laundry detergent will neutralizethe acid in the condensate. However, other suitable waste drainlocations may be used according to local codes.CAUTION Do not cap or plug the integrated condensate line. Ifprevented from draining, condensate can damage the waterheater. The condensate line must have a negative slope to drainproperly.Before connecting the condensate drain, choose one of thefollowing disposal options:To thelaundry tubDirect to theexternal drainExternal drain To the laundry tub viaa condensate pumpTo thedrain via aneutralizera. From the water heater directly into an external drain.b. From the water heater, through a neutralizing agent, and theninto an external drain.Note If you choose this option, the neutralizing agentmust be replaced periodically. Depletion of theneutralizing agent will vary, based on the usagerate of the water heater. During the first year ofoperation, the neutralizer should be checked everyfew months for depletion and replaced as needed.c. From the water heater into a laundry tub.Note The bottom of the water heater must be higherthan the top of the laundry tub to use this option.The condensate line must have a negative slope todrain properly.d. From the water heater into a condensate pump, and then into alaundry tub.Note A pump can be used when there is a long distancebetween the water heater and the laundry tub orwhen the bottom of the water heater is lower thanthe top of the laundry tub.To connect the condensate drain:1. Connect a drain line to the 1/2 in fitting at the bottom of thewater heater.Use only corrosion-resistant material for the drain line, such asPVC or CPVC. Do not reduce the size of this fitting or the drainline to less than 1/2 in.NPT 1/2 in2. Place the free end of the drain line into an appropriate drain.3. If you are using a condensate pump, ensure that the pumpallows for up to 2 GPH of drainage for each water heater in thesystem.If you are not using a condensate pump, ensure that the drainline is pitched downward at a minimum slope of 1/4 in per foot.