Setting The Parameters - Navien NCB-20LHWE Installation & Operation Manual

11.5 Setting the Parameters

You can modify parameter settings for boiler operations, such
as the space heating and DHW temperature ranges, in di erent
operating conditions. Follow the instructions below to enter the
Special Parameter mode and change parameter settings.
CAUTION
Parameters must be set by a quali ed professional with
an extensive understanding of the boiler system. Setting
parameters improperly may lead to property damage or
injury.
1. Press the Power button and turn o the boiler.
2. Press and hold the ECO and Summer/Winter button at the
same time for 5 seconds to enter the Special Parameter
mode.
3. You will be asked to enter a password ("PASS" is displayed).
The factory default password is "1234".
4. Press the INFO button and enter your 4-digit password.
Use the + (Up) or – (Down) buttons to increase or decrease
numbers and the Summer/Winter button to move between
digits.
5. When you are nished, press the INFO button.
6. Press the + (Up) or – (Down) buttons to move to a parameter
setting, and then press the INFO button to enter the
Parameter Edit mode.
7. Press the + (Up) or – (Down) buttons to change the
parameter value.
8. When you are nished, press the INFO button to save the
settings.
9. To exit the Special Parameter mode, press the Reset button.
48 Operating the Boiler
If you enter an incorrect password 10 times or make
Note
no inputs for 5 minutes, the boiler will return to the
Normal mode.
To return to the previous mode, press the Reset
button.
The Factory default password is "1234".
If you make no inputs 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 individual parameters
to their default values.
When you reset one of the following parameters,
the corresponding parameter will be reset
automatically:
- Supply absolute MIN or MAX
- Return absolute MIN or MAX
- Lowest Outdoor Temperature or Highest Outdoor
Temperature
Con guring the Outdoor Reset Control Mode
Display
This mode is used to con gure the Outdoor Reset Control mode.
This mode is disabled by default.
CAUTION
An outdoor sensor error may occur if the Outdoor Reset
Control mode is enabled without the outdoor sensor
installed
In the Outdoor Reset Control mode, the boiler's water
Note
temperature is regulated according to the outdoor
temperature. The Outdoor Reset Control operation
ensures that the system provides optimal space
heating. It helps limit the cost for space heating
by preventing unnecessary fuel consumption and
minimises air pollution.
Description
Outdoor Reset enabled
Outdoor Reset disabled