Navien NCB-20LHWE, Installation & Operation Manual

Page: 53 / 80

Setting the LCD Back Light
This menu may be used to set the status of LCD back light.
Default: ON
Display Description
LCD back light maintains
minimum brightness.
LCD back light is off when no
button is pressed.
Setting the Maintenance Time
Display Description
Maintenance time
This menu may be used to set the maintenance time.
Default: 0
Range: 0–999 days
Setting the DHW Heat Demand
Display Description
DHW heat demand (with
cylinder temp. sensor)
DHW heat demand (with
cylinder stat)
DHW tank not in use
This menu may be used to select the control method for the
domestic hot water temperature when using an external tank.
You can select either cylinder temp. sensor or cylinder stat.
DHW Heat Demand Setting
Setting Remark
DHW Heat Demand Default: Cylinder temp. sensor
Setting the Return Absolute MIN Temperature
Display Description
Return absolute MIN set point
(°C)
This menu can be used to change the minimum return
temperature range in Return Control mode. When Custom
mode is configured in Outdoor Reset Control mode, changes to
the return temperature are based on the return absolute MIN
temperature range.
Return Absolute MIN Temperature Range
Range Remarks
20°C – [MAX set point - 10°C] Default: 30°C
Low Burning Time
Display Description
Low burning time during initial
heating.
This menu may be used to set the low burning time during
initial heating.
Default: 1 min
Range: 0–20 min
Burning Acceleration Time
Display Description
Burning acceleration time to CH
Max during initial heating.
This menu may be used to set the burning acceleration time.
Default: 3 min
Range: 0–20 min
53 Operating the Boiler