Navien NCB-150E Installation & Operation Manual page 25

3.3.1 Condensate Neutralizer Kit
WARNING
To avoid damaging the appliance, the neutralizer inlet and
discharge must be lower than the condensate drain.
Do NOT allow exhaust flue gases to vent through the
neutralizer. Leakage can cause injury or death from carbon
monoxide.
The connection between the appliance and the neutralizer
must be installed to prevent the backflow of condensate
into the appliance.
Do not connect more than one appliance to the neutralizer.
If option 'b' is selected for condensate disposal, the Navien
condensate neutralizer kit is recommended. The condensate from
the appliance flows through the neutralizing media and increases
the pH of the condensate. An increased pH prevents corrosion of
the installation's drainage system and the public sewer system.
Installation guidelines
The inlet has a center connection port and the outlet has an
offset connection.
Install the neutralizer on the wall or the floor and secure it using
the brackets supplied with the kit.
If the neutralizer is installed horizontally, rotate the neutralizer to
position the outlet at the highest point (Figure 1).
If the neutralizer is mounted vertically, ensure that the outlet is
higher than the inlet (Figure 2).
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 areas where the
Note
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 boiler and water heater condensate removal.
Optional
overflow bypass
Figure 1. Horizontal installation
Optional
overflow bypass
Figure 2. Vertical installation
Installing the System Piping 25