Pcb Board Settings - Navien NR-180 Installation Manual

Gas Water Heater Installation

█ PCB Board Settings:

Water Heater Temperature Settings:
Hot water temperatures over 125°F can cause severe burns instantly or death
from scalding.
 With the Navien Water Heaters, the temperature has been preset at the factory to
120ºF (NR, NR-A), 140ºF (NP, NP-A). The PCB board will electronically control this
temperature. The output hot water temperature can be adjusted either manually
using the main PCB board's dip switches or with the remote controller. Using the
dipswitches, 4 hot water output temperatures can be selected. Please refer to the
chart below.
 Once the remote controller is connected to the Water Heater, it overrides the PCB
board dipswitch settings. If the remote controller is disconnected from the unit, the
PCB board will automatically revert to the temperature indicated by the dipswitches.
The PCB board does not store the remote controller's temperature in memory. As
such, the remote controller must remain connected to the Water Heater at all times
to maintain any temperature other than the 4 presets.
Dipswitch settings for all NR, NR-A series are below: the factory default setting
temperature is 120°F (49°C)
WARNING : Only change relevant switches. DO NOT touch any other switches.
Shown sample dipswitch configurations are NR, NR-A series.
Dipswitch settings for all NP, NP-A series are below: the factory default setting
temperature is 140°F (60°C)
WARNING : Only change relevant switches. DO NOT touch any other switches.
Shown sample dipswitch configurations are NP, NP-A series.
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