Navien NHB H Series Installation And Operation Manual page 25

If local codes permit, install a Y-fitting as a bypass
●
drain for increased safety when the condensate
drain is blocked. 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 boiler and water
heater condensate removal.
Optional overflow bypass
Figure 1. Horizontal installation
Optional
overflow bypass
Figure 2. Vertical installation
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.
Installing the System Piping 25