Navien NFB Series Installation & Operation Manual page 92

Item
12. DHW Min Limit
13. DHW Max Limit
14. Freeze protection
15. Low Sys Pressure
16. High Sys Pressure
17. Boiler pump
Oper(DHW)
18. Sys pump
Oper(DHW)
19. Zone2 pump
Oper(DHW)
20. DHW pump
Oper(DHW pri)
92 Operating the Boiler
Description
Set the DHW supply minimum
temperature.
Setting range: DHW minimum
●
capacity (%) – [DHW MAX capacity
limit - 20] %
Default: Boiler's minimum heat
●
capacity
Set the DHW supply maximum
temperature.
Setting range: [DHW Min capacity
●
limit + 20] % – 100%
Default: 100%
●
Set the pump freeze protection
temperature.
Setting range: 43°F (6°C) – 50°F (10°C)
●
Default: 50°F (10°C)
●
The system freeze protection
Note
temperature is set based on
the pump freeze protection
temperature.
Set the low water system pressure.
Setting range: 4 – 17 psi
●
Default: 6 psi
●
Set the high water system pressure.
Setting range: 40 – 80 psi
●
Default: 50 psi
●
Turn on or turn off the boiler pump in
DHW mode.
Setting range: On/Off
●
Default: Off
●
Turn on or turn off the system pump in
DHW mode.
Setting range: On/Off
●
Default: Off
●
Turn on or turn off Zone 2 pump in
DHW mode.
Setting range: On/Off
●
Default: Off
●
Turn on or turn off the DHW pump
in DHW mode when both the space
heating and DHW demands are
present.
Setting range: On/Off
●
Default: On
●
Item
Set the space heating pump over-run
time.
21. Boiler Pump
Delay**
Setting range: 3 – 40 min
●
Default: 40 min
●
When the DHW temperature sensor is
used:
22. DHW Demand
On Diff
Setting range: 0–10°C (0–18°F)
●
Default: 3°C (5°F)
●
When the DHW temperature sensor is
used:
23. DHW Demand
Off Diff
Setting range: 0–5°C (0–9°F)
●
Default: 0°C (0°F)
●
Set the time for service notification.
Setting range: 30 – 3650 days (10
●
years)
24. Service Notif Time
It can be set in 10 day increments.
●
Default: 1820 days (5 years)
●
Set the service notification according to
the operating times.
Setting range: 300 – 36500 cycles
25. Service Notif Cycl
●
It can be set in 100 cycle increments.
●
Default: 18200 cycles
●
26. Service contact # View the service contact information.
Initialize all parameter settings (panel
27. Factory Reset
and main controller) to factory default.
Change the parameter setting
password.
Rotate the Command dial (
28. P/W Change
change numbers and places, and press
the Command dial (
password.
Description
) to
) to save the new