Navien NPE-180A2 Installation Manual page 40

If the neutralizer is installed horizontally, rotate
●
the neutralizer to position the outlet at the
highest point.
Optional
overflow bypass
[Horizontal installation]
If the neutralizer is mounted vertically, ensure that
●
the outlet is higher than the inlet.
Optional
overflow bypass
[Vertical installation]
40 Installing the Water Heater
Ensure that the condensate runs freely to the
●
drain.
Ensure all connections are made to prevent
●
the backflow of condensate. Use corrosion
resistant piping and secure all piping to prevent
movement.
Do not install condensate piping in
Note
areas where the temperature drops
below freezing point. Protect piping in
high pedestrian areas from damage and
vibration.
For increased safety when the condensate drain
●
blocks, install a Y-fitting. Connect the Y-fitting as
shown in the installation diagram and ensure that
the condensate runs freely to the drain.
Ensure that the discharge connection is
●
accessible. Access to the discharge connection is
required for maintenance and pH testing.
If there is insufficient gradient for drainage, install
●
a drainage pump designed for water heater and
water heater condensate removal.
Maintenance
Periodically monitor the level of media in the
neutralizer and test the pH level at the outlet. We
recommend an annual pH test using recognized
test strips or an electronic pH meter to obtain
precise measurements. Replace the neutralizing
media when the pH drops below the minimum
level required by the local water authority. If the pH
level is not specified, replace the neutralizing media
when the pH is below 6.0. For replacement media,
contact your local Navien distributor.