Navien NCB-150E Service Manual page 49

CAUTION
If you enter an incorrect password 10 times or make no input 5 minutes, the boiler will return to the Normal Mode.
●
To return to the previous mode, press the Reset button.
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The Factory default password is "1234"
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If you make no adjustment for 10 seconds in the Parameter Edit mode, the current parameter value will be saved automatically.
●
Press and hold the Reset button in Parameter Edit mode for 5 seconds to reset all settings to their default values.
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When you reset one of the following parameters, the corresponding parameter will be reset automatically.
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Supply absolute MIN or MAX
Return absolute MIN or MAX
Lowest Outdoor Temperature or Highest Outdoor Temperature
●
Item
(A) Outdoor Reset This mode is used to configure the Outdoor Reset Control mode.
Use Setting This mode is disabled by default from the factory.
This mode is used to configure the heat load type to be used with the
Outdoor Reset Control mode.
A preset or user-defined temperature range is selected automatically based
on the heat load type selected.
1. Finned Tube
2. FAN Coil
3. Cast Iron
(B) Outdoor Reset
4. Low Mass
Heat Load Setting
5. High Mass
6. Radiator
7. Custom
Heat loads 1-6 show the preset temperature ranges based on the load type
selected, while heat load 7 provides a custom temperature range. When the
custom temperature range is in use, the boiler operates based on the user-
defined "Absolute Min" and "Absolute Max" temperature settings.
48 NCB-E Service Manual
Description
Supply CH Set-
Heat Load
point Range
120-180°F
Baseboard (48.5-82°C)
140-180°F
(60-82°C)
100-170°F
Baseboard (37.5-76.5°C)
80-140°F
Radiant (26.5-60°C)
80-120°F
Radiant (26.5-48.5°C)
120-170°F
(48.5-76.5°C)
CH Supply
Control
Absolute MIN/
MAX Set-Point
Return CH Set-
Remarks
point Range
101-147°F
Default
(38-63.5°C)
116-147°F
(46.5-63.5°C)
86-139°F
(30-59°C)
70-116°F
(21-46.5°C)
70-101°F
(21-38°C)
120-180°F
(38-59°C)
CH Return
Control
User-Defined
Absolute MIN/
MAX Set-Point
Display
Outdoor Reset in use
Outdoor Reset not in use
Outdoor Reset heat load types
(1-7)
Outdoor Reset heat load not
selected
Version 1.4