Navien NCB-150E Service Manual page 50

Item
This mode is used to configure the lowest outdoor temperature. The boiler
will operate at the high end of the supply or return set-point range at this
outdoor temperature.
(C) Lowest Outdoor
Outdoor Low Temperature Setting Range
Temperature
Setting
This mode is used to configure the heat load type to be used with the
Outdoor Reset Control mode
The boiler will operate at the high end of the supply or return set-point range
at this outdoor temperature
(D) Highest Outdoor
Temperature
Outdoor Low Temperature Setting Range
Setting
[Outdoor Low Temperature Set-point +
9°F(5°C)] - 104°F(40°C)
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 9°F(5°C) and the return temperature by
5°F(3°C) after a set time elapses.
(E) Boost Interval
Time Setting
Boost Interval Time
Boost Temperature
Description
Setting range
-4°F(-20°C) - [Outdoor High Temperature
Set-point - 9°F(5°C)]
Setting range
Setting Range
0-120 min (0 : OFF)
Space Heating Supply
(Fixed Value): 9°F(5°C)
Space Heating Return
(Fixed Value): 5°F(3°C)
For Celsius (°C) mode;
ex) at - 10°C
For Fahrenheit (°F) mode;
ex) at 14°F
Default
14°F(-10°C)
Lowest Outdoor Reset is not used
For Celsius (°C) mode;
ex)at 21°C
For Fahrenheit (°F) mode;
ex) at 70°F
Default
70°F(21°C)
Highest Outdoor Reset is not used
If Boost Interval Time set is
30 minutes
Remarks
Default : OFF (0)
Display
System Details 49