Navien NCB-20LHWE, Руководство по установке и эксплуатации

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Setting the Min Heat Capacity for Space Heating
Display Description
Space heating min heat
capacity (%)
This menu is used to configure the desired space heating
capacity. When the boiler operates in the Normal mode, the min
space heating capacity is limited to the set value (%).
Space Heating Min Heat Capacity Setting Range
Range Remarks
Space Heating Min Heat
Capacity – [Space Heating Max
Heat Capacity set point - 20%]
Default: Space heating min
heat capacity (%)
Setting the Pump Freeze Protection Temperature
Display Description
Pump freeze protection
temperature (°C)
This menu is used to configure the circulation pump freeze
protection temperature.
When the space heating supply temperature stays below the set
value for longer than 10 seconds, the boiler runs the circulation
pump to prevent freeze damage (the pump runs for 10 minutes,
then stops for 1 minute).
Default: 10°C
Range: 6–10°C
Setting the Anti-fast Cycling Time
Display Description
Anti-fast cycling time (min)
The anti-fast cycling time is the duration that the boiler stops
its space heating operation when the space heating supply or
return temperatures reach the set values for boiler operation
stop temperatures. The boiler will not resume space heating
until the duration elapses, even when the space heating supply
or return temperatures return to within the set ranges.
Default: 3 minutes
Range: 0–20 minutes
Setting the Boost Interval Time
Display Description
Boost interval time (min)
The boost interval time may be set to prevent interruption in
space heating while using the Outdoor Reset Control mode,
due to changes in heat load conditions. With the boost interval
time enabled, the boiler increases the space heating supply
temperature by 5°C and the return temperature by 3°C after a
set time elapses.
Boost Interval Time and Temperature Setting
Setting Range Remarks
Boost Interval
Time
OFF (0), 1–120 min
Default:
OFF (0)
Boost
Temperature
Space Heating Supply (Fixed
Value): 5°C
Space Heating Return (Fixed
Value): 3°C
Setting the Max Heat Capacity for Space Heating
Display Description
Space heating max heat
capacity (%)
This menu is used to configure the desired space heating
capacity. When the boiler operates in the Normal mode, the max
space heating capacity is limited to the set value (%).
Space Heating Max Heat Capacity Setting Range
Range Remarks
[Space Heating Min Heat
Capacity set point + 20%] –
100%
Default: 100%
Setting the DHW Wait Time
Display Description
DHW wait time (min)
The DHW wait time is the duration that the boiler maintains the
DHW supply mode after a DHW demand. With the DHW wait
time enabled, a faster DHW supply may be available when there
is a subsequent DHW demand. The boiler switches the 3-way
valve to space heating mode when the set time elapses.
Default: 5 minutes
Range: 0–20 minutes
Note
When a call for space heating occurs simultaneously
with a DHW demand, the 3-way valve will
immediately switch to space heating mode at the end
of the DHW demand.
Setting the Burner-Off Temperature
Display Description
Burner-off temperature (°C)
During space heating, the boiler turns off the burner when the
space heating supply temperature meets or exceeds the burner-
off temperature.
Burner-Off Temperature Range
Range Remarks
0–30°C Default: 2°C
Setting the Pump Overrun Time
Display Description
Pump overrun time (min)
The pump overrun time is the duration the circulation pump
continues to run between the space heating supply or return
temperature reaching the set point and the burner turning off. If
the space heating supply or return temperature remains outside
of the boiler operation temperature range for a set period, the
pump stops for 10 mins, runs again for 5 mins, and then repeats
the cycle.
Default: 40 minutes
Range: 3–40 minutes
Setting the DHW Max Heat Capacity
Display Description
DHW max heat capacity (%)
This menu is used to configure the desired DHW capacity. When
the boiler operates in the Normal mode, the max DHW capacity
is limited to the set value (%).
DHW Max Heat Capacity Setting Range
Range Remarks
[DHW Min Heat Capacity set
point + 20%] – 100%
Default: 100%
Setting the DHW Min Heat Capacity
Display Description
DHW min heat capacity (%)
This menu is used to configure the desired DHW capacity. When
the boiler operates in the Normal mode, the min DHW capacity
is limited to the set value (%).
DHW Min Heat Capacity Setting Range
Range Remarks
DHW Min Heat Capacity –
[DHW Max Heat Capacity set
point - 20%]
Default: DHW Min Heat
Capacity (%)
50 Operating the Boiler