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Navien NFB Series User Manual

Navien NFB Series
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84 Operating the Boiler
You can adjust the temperature while the display is flashing. Once
the display stops flashing, the current temperature setting is
stored.
Note
Take note of the original DHW indirect supply
temperature in case you want to restore it to the
default.
The default DHW temperature range is 104°F (40°C,
Absolute MIN) to 180°F (82°C, Absolute MAX).
You can adjust the temperature ranges in the
parameter settings menu.
The boiler will retain your settings during a power
outage.
11.2.3 Resetting the Boiler
If an error message appears during boiler operation, reset the
boiler to resolve the problem. Press the Back button (
) on the
front panel to reset the boiler.
If resetting the boiler does not solve the problem, refer to the
Troubleshooting section of this manual or contact Technical
Support at 1-800-519-8794.
11.2.2 Adjusting the DHW Indirect Supply
Temperature
To adjust the water temperature:
1. In normal operation mode, rotate the Command dial (
). The
space heating temperature(
) is highlighted on the screen.
2. Rotate the Command dial ( ) to the right to select the DHW
temperature.
3. Press the Command dial ( ) to select the indirect DHW
temperature (
). The highlighted section will flash.
4. Rotate the Command dial ( ) to the right or left to increase or
decrease the temperature.
5. Press the Command dial (
) to confirm the new temperature.
6. Press the Back button (
) to return to normal operation
mode, or rotate the Command dial to adjust other operation
conditions.

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Navien NFB Series Specifications

General IconGeneral
TypeCondensing Boiler
Fuel TypeNatural Gas or Propane
Heat ExchangerStainless Steel
Vent TypeDirect Vent
Vent Diameter2" or 3"

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