Navien NFC-175, Service Manual

Page: 37 / 138

NFC Service Manual 37 Version 1.0
Item Description
16. Flame Value
Flame detector AD value
●
Flame On: 8bit AD values equal to or
lower than 70
●
Flame Off: 8bit AD values equal to or
higher than 175
17. Fan Target RPM Set fan speed (RPM)
18. Fan Current RPM Fan speed (RPM)
19. Fan Target APS Set APS voltage (V)
20. Fan Current APS APS voltage (V)
21. Flow control
valve status
100 - Close state
22. Mixing valve
status
0 - Close state
23. Exhaust Temp Exhaust temperature (°F)
24. Outdoor Reset Outdoor reset status (Enable / Disable)
25. Outdoor Reset
Curve
Outdoor reset curve load type (displayed
when the outdoor reset option “20.
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)
26. Boost Interval
Time
Boost interval set time (min)
27. 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)
28. Well pump
Well pump status
OFF - Unused, ON - Used
29. Model Model type
30. Gas Fuel type (NG/LPG)
31. Main F/W Ver Main firmware version
32. Panel F/W Ver Controller panel firmware version
4.8.3 Setting the Space Heating Operation
To set the boiler’s space heating operation, press the Menu button
( ), and then select “3. 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.
Press the Back button ( ) to return to the previous screen or
menu.
Item Description
1. SH Set Temp
Set space heating target temperature
(°F).
●
Setting range: 104
–
180°F (40
–
82°C)
●
Default: 180°F (82°C)
This option is available only when
“1. Space Htg ON/OFF” is set to
“Enabled”.
2. Outdoor Reset
ON/OFF
Default: Disable
2-1. Outdoor Reset
Curves*
Select a heatload type of the Outdoor
Reset Control.
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)
This option is available only when
“2. Outdoor Reset ON/OFF” is set to
“Enabled”.
2-2. Outdoor High
Temp Set**
Set the maximum temperature for the
Outdoor Reset Control.
●
Setting range: [MIN Set-point + 9°F
(5°C)] – 104°F (40°C)
●
Default: 70°F (21°C)