Resetting The Boiler - Navien NFB-175H User's Information Manual

Item
AHU Space Heating Set
Temperature (°F)
●
5. AHU SH Set Temp
●
Note
Use with iFlow Air
Handlers Only.
Heating supply
6. Supply Temp
temperature (°F)
Boiler return temperature
7. Return Temp
(°F)
System supply
8. Sys Supply Temp
temperature (°F)
System return
9. Sys Return Temp
temperature (°F)
10. Outdoor Temp Outdoor temperature (°F)
11. Approx. Boiler
Flow rate (GPM)
Flow
12. DHW Tank set DHW Tank set temperature
Temp (°F)
13. Tank Sensor DHW indirect tank
Temp temperature (°F)
14. Water Press Water pressure (psi)
Flame detector AD value
●
15. Flame Value
●
16. Fan Target RPM Set fan speed (RPM)
17. Fan Current RPM Fan speed (RPM)
18. Fan Target APS Set APS voltage (V)
19. Fan Current APS APS voltage (V)
20. Exhaust Temp Exhaust temperature (°F)
Outdoor reset status
21. Outdoor Reset
(Enable / Disable)
Description
If AHU is not connected,
"--" will be displayed.
The temperature is
displayed by 1 degree
increments for Fahrenheit
and by 0.5 degree
increments for Celsius.
This is due to the degree
control specifications of
0.5 degree for the AHU
communication type.
Flame On: 8bit AD
values equal to or lower
than 70
Flame Off: 8bit AD
values equal to or
higher than 175
Item
Outdoor reset curve load
type (displayed when the
outdoor reset option "21.
Outdoor Reset" is enabled)
22. Outdoor Reset
Curve
installer)
23. Boost Interval Boost interval set time
Time (min)
Sea Level (0–2,000 ft)
Level 1 (2,000–5,400 ft)
24. High Altitude
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
Controller panel firmware
28. Panel F/W Ver
version

3.4 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.
Description
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
Operating the Boiler 13