Navien NFC Series, User'S Information Manual

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Operating the Boiler 9
2. Press the Command dial ( ) to select the space heating
temperature ( ). The highlighted section will flash.
3. Rotate the Command dial ( ) to the right or left to increase or
decrease the temperature.
4. Press the Command dial ( ) to confirm the new temperature.
5. Press the Back button ( ) to return to normal operation
mode, or rotate the Command dial ( ) to adjust other
operation conditions.
You can adjust the temperature while the highlighted section is
flashing. Once the flashing stops, the current temperature setting
is stored.
Note
●
The space heating temperature cannot be adjusted
when the Outdoor Reset Control is used.
●
The space heating temperature cannot be adjusted
if the boiler is operating as a sub unit in a cascade
system. The main unit’s set temperature will be
displayed on the screen.
●
In case of outdoor reset sensor malfunction, the
boiler will operate at this set temperature.
●
Take note of the original heating temperature in case
you want to restore it to the default.
●
The default space heating supply water temperature
range is 104°F (40°C, Absolute MIN) to 180°F (82°C,
Absolute MAX).
●
The default space heating return water temperature
range is 86°F (30°C, Absolute MIN) to 149°F (65°C,
Absolute MAX).
●
You can adjust the temperature ranges in the
parameter settings menu.
●
The boiler will retain your settings during a power
outage.
3.1 Turning the Boiler On or Off
To turn the boiler on or off, press the Power button.
When the power is on, the boiler automatically enters normal
operation mode, and the boiler’s operating conditions are
displayed on the screen.
Note
The boiler status icons remain displayed when the
boiler is turned off.
3.2 Adjusting the Temperature
3.2.1 Adjusting the Space Heating Temperature
To adjust the heating temperature:
1. In normal operation mode, rotate the Command dial ( ) . The
space heating temperature ( ) is highlighted on the screen.
3. Operating the Boiler