Navien H2Air Installation Manual page 13

For NPN:
Remove the screws holding the front panel to the bracket to pull out the part.
Attach the H Air controller on the back side of the Front Panel at the
2
designated mounting location by using the provided tabs on the component
housing.
6. Connect all cables and wiring to the H
Connections", on page 17.
7. Set the proper DIP switches for the desired installation setup. For more
details, refer to "1.3.2 Dip Switch Function Table", on page 7.
8. Make sure to replace the PCB or front panel back into the water heater and
secure it with the two screws.
9. Close the front cover and secure it with the 4 screws.
CAUTION
Before disconnecting cables inside the unit, label all cables. Wiring errors can
cause improper operation and dangerous situations. Verify wiring
connections and unit operation after servicing.
Air. For more details, refer to "3.2 Cable
2
Installing the Device 13