Navien NHB H Series, Инструкция по установке и эксплуатации

Страница: 112 / 143

112 Operating the Boiler
Item Description
11. Zone T/S Start-
up Delay Time
Set the delay time for the
burner to operate after a
call for heat is received for
the AHU.
●
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. Low Sys Pressure
Set the low water system
pressure.
●
Setting range: 4 – 17 psi
●
Default: 6 psi
17. High Sys
Pressure
Set the high water system
pressure.
●
Setting range: 44 – 57
psi
●
Default: 50 psi
Item Description
5. SH Burner Off Diff
Set the temperature
range to turn off space
heating.
●
Setting range: - 2°F
(1°C) – 54°F (30°C)
●
Default: 4°F (2°C)
6. SH Burner On Diff
Set the temperature
range to turn on space
heating.
●
Setting range: - 2°F
(1°C) – 54°F (30°C)
●
Default: 5°F (3°C)
7. SH Min Limit
Set space heating
minimum heat capacity
limit.
●
Setting range: Space
heating Min capacity
(%) – [space heating min
capacity limit -20]) %
●
Default: Boiler’s
minimum heat capacity
8. SH Max Limit
Set space heating
maximum heat capacity
limit.
●
Setting range: (Space
heating Min capacity
limit +20) % – 100%
●
Default: 100%
9. SH Min Burning
Time
Set the low-load
combustion time at initial
operation.
●
Setting range: 1 – 20
min
●
Default: 1 min
10. Burning
Acceleration Time
Set the time to reach the
maximum space heating
capacity after initial
operation.
●
Setting range: 0 – 20
min
●
Default: 1 min