Navien NFC-250/175H, Руководство по установке, Страница: 121 / 151

121 Operating the Boiler
Item Description
18. Boiler
Pump
Delay**
Set the space heating pump
over-run time.
●
Setting range: 3 – 40 min
●
Default: 40 min
19. DHW
Wait Time
Set the DHW wait time.
●
Setting range: 0 – 20 min
●
Default: 3 min
20. Recirc.
Interval Time
Set the recirculation or HotButton
operation time.
●
Setting range: 1 – 120 min
●
Default: 20 min
21. Recirc.
Sampling
Time
Set the recirculation interval time.
●
Setting range: 1 – 120 min
●
Default: 30 min
22. Recirc. Off
Diff. Temp
Set the temperature range to
turn off
recirculation or HotButton
operation.
●
Setting range: 5°F (3°C) – 54°F
(30°C)
●
Default: 9°F (5°C)
23. Fixture
Dist.
(HotButton)
Set On-Demand recirculation to
activate according to pipe length
when HotButton is installed, and
Thermal Bypass and external
surface thermometer is disabled.
●
Setting range: 15 ft (4.5 m)
– 660 ft (198 m) (5 ft (1.5 m)
intervals)
●
Default: 30 ft (9 m)
24. Gas
Connect
Error Check
Enable
Enable or disable the gas
connection error detection
function.
●
Setting range: Enable or
disable
●
Default: Enable
25. Service
Notif Time
Set the time for service
notification.
●
Setting range: 30 – 3650 days
(10 years)
●
It can be set in 10 day
increments.
●
Default: 1820 days (5 years)
Item Description
11. Zone
T/S Start-up
Delay Time
Set the delay time for the burner
to operate when there is a call for
heat for a zone valve.
●
Setting range: 0–120 sec
●
Default: 0 min
12. Anti
Fast Cycling
Time*
Set the anti-fast cycling time.
●
Setting range: 0 – 20 min
●
Default: 3 min
13. DHW Min
Limit
Set the DHW minimum heat
capacity.
●
Setting range: DHW minimum
capacity (%) – [DHW MAX
capacity limit - 20] %
●
Default: Boiler’s minimum heat
capacity
14. DHW Max
Limit
Set the DHW maximum heat
capacity.
●
Setting range: [DHW Min
capacity limit + 20] % – 100%
●
Default: 100%
15. Freeze
protection
Set the pump freeze protection
temperature.
●
Setting range: 43°F (6°C) – 50°F
(10°C)
●
Default: 50°F (10°C)
Note
The boiler pump will
operate to provide
system freeze protection
when the water
temperature falls below
this value.
16. Auto-Fill
Pressure
Set the Auto-Fill Pressure.
●
Setting range: 12 – 50 psi (0.8
– 3.4 bar)
●
Default: 12 psi (0.8 bar)
17. High Sys
Pressure
Set the high system water
pressure.
●
Setting range: [Auto-Fill
Pr 10 psi] – 80 psi
([Auto-Fill Pr 0.6bar] –
5.5 bar)
Note
The high system water
pressure cannot be set
lower than 40 psi (2.7 bar).
●
Default: 50 psi (3.4 bar)