Navien NFB-175H, Installation Manual, Page: 101 / 135

101 Operating the Boiler
Press the Back button ( ) to return to the previous
screen or menu.
Item Description
1. SH Set Temp
Set space heating target
temperature (°F).
●
Default: 180°F (82°C)
●
The setting range varies
depending on the
heating control type:
- Supply Temperature or
Sys Supply Temperature:
104–180°F (40–82°C)
- Return Temperature or
Sys Return Temperature:
86–149°F (30–65°C)
Note
●
If “3. Zone Priority
Settings” is enabled, the
set temperature for each
zone is displayed on the
screen.
●
After selecting and
confirming the set
temperature for each
zone, press and hold the
Command dial ( ) for
more than 2 seconds
to return to normal
operation mode.
2. Zone Settings
Set the system type and
operation details.
1. Zone Pump System
2. Zone Valve System
2-1. Pump 1 Settings
Set the pump 1 type.
1. Zone 1 pump
2. DHW pump
This operation is available
only when “2. Zone
Settings” is Zone Pump
System.
Item Description
22. Outdoor Reset
Curve
Outdoor reset curve load
type (displayed when the
outdoor reset option “21.
Outdoor Reset” is enabled)
1: Finned Tube Baseboard
2: FAN Coil
3: Cast Iron Baseboard
4: Low Mass Radiant
5: High Mass Radiant
6: Radiator
7: Custom (set by
installer)
23. Boost Interval
Time
Boost interval set time
(min)
24. High Altitude
Sea Level (0–2,000 ft)
Level 1 (2,000–5,400 ft)
Level 2 (5,400–7,700 ft)
Level 3 (7,700–10,100 ft)
25. Model Model type
26. Gas Fuel type (NG/LPG)
27. Main F/W Ver Main firmware version
28. Panel F/W Ver
Controller panel firmware
version
11.5.2 Setting the Space Heating
Operation
To set the boiler’s space heating operation, press the
Menu button ( ), and then select “2. Space Htg
Operation”.
Rotate the Command dial ( ) to switch between
the list items or to increase/decrease setting values.
Press the Command dial ( ) to select an item or to
confirm after making changes.