28 Installing the System Piping
Figure 1. Horizontal installation
Y-fitting
Figure 2. Vertical installation
Y-fitting
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.
3.4 Filling the System
Before filling the boiler, loosen the air vent cap to enable the
system to fill properly.
Tighten the air vent cap and the vent screws when the system is
full.
Air Vent Cap
Pressure
Relief Valve
Note
Ensure that the vent cap is re-installed and the vent
screws on the system and boiler pumps are properly
tightened before testing or operating the system.
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