Navien NCB700-2S Plus 42K Installation & Operation Manual page 71

Condensing combi boiler
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Press the Back button (
) to return to the previous screen or
menu.
Item
1. Supply MIN Set-point
2. Supply MAX Set-point
3. Return MIN Set-point
4. Return MAX Set-point
5. CH Burning Off Diff
6. CH Burning On Diff
7. Anti Fast Cycling Time*
8. Freeze protection
9. Boiler Pump Delay
Description
Set the central heating supply
minimum temperature.
Setting range: 25°C – [MAX
Set- point – 20°C]
Default: 40°C
Set the central heating supply
maximum temperature.
Setting range: [MIN Set-point
+ 20°C] – 90°C
Default: 85°C
Set the central heating supply
minimum temperature.
Setting range: [MAX Set-
point - 10°C]
Default: 30°C
Set the central heating supply
maximum temperature.
Setting range: [MIN Set-point
+ 10°C] – 70°C
Default: 65°C
Set the temperature range to
turn off central heating.
Setting range: 0°C – 30°C
Default: 2°C
Set the temperature range to
turn on central heating.
Setting range: 1°C – 30°C
Default: 3°C
Set the anti-fast cycling time.
Setting range: 0 – 20 min
Default: 3 min
Set the pump freeze protection
temperature.
Setting range: 6°C – 10°C
Default: 10°C
The system
Note
freeze protection
temperature is set
based on the pump
freeze protection
temperature.
Set the boiler pump off delay
time.
Setting range: 30 – 40 min
Default: 40 min
Item
10. CH Min Limit
11. CH Max Limit
12. DHW Min Limit
13. DHW Max Limit
14. DHW Wait Time
15. CH Min Burning Time
16. Burning Acceleration
Time
17. DHW Priority Time
18. Service Notify Time
Description
Set the central heating
minimum heat capacity limit.
Setting range: Central heating
minimum capacity (%) –
[central heating minimum
capacity limit-20] %
Default: Boiler's minimum
heat capacity
Set the central heating
maximum heat capacity limit.
Setting range: (Central
heating minimum capacity
limit + 20) % – 100%
Default: 100%
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 minimum
capacity limit +20] % – 100%
Default: 100%
Set the DHW wait time.
Setting range: 0 – 20 min
Default: 5 min
Set the low-load combustion
time at initial operation.
Setting range: 0 – 20 min
Default: 1 min
Set the time to reach the
maximum central heating
capacity after initial operation.
Setting range: 0 – 20 min
Default: 3 min
Set the time duration that
the boiler will remain in DHW
priority.
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)
Operating the Boiler
71

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Ncb700-3s 54k

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